body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    color: #333;
    min-height: 100vh;
    background: linear-gradient(135deg, #f5f7fa 0%, #e8d5c4 100%);
    display: flex;
    flex-direction: column;
}

/* ===== 顶部标题区域 ===== */
.site-title {
    text-align: center;
    background: white;
    position: relative;
    height: 300px;
    overflow: hidden;
}

.site-title img {
    width: 1920px;
    height: 300px;
    display: block;
    margin: 0 auto;
    max-width: 100%;
    object-fit: cover;
}

.site-title h1 {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    margin: 0;
    padding: 0 20px;
    color: #2c3e50;
    font-size: 2.5rem;
    text-shadow: 0 2px 4px rgba(255, 255, 255, 0.5);
    z-index: 1;
    white-space: nowrap;
}

/* ===== 导航栏 ===== */
.nav-bar {
    background: linear-gradient(to right, rgba(255, 182, 153, 0.85), rgba(255, 161, 127, 0.85), rgba(255, 182, 153, 0.85));
    backdrop-filter: blur(8px);
    height: 60px;
    display: flex;
    align-items: center;
    position: relative;
    box-shadow: 0 2px 15px rgba(255, 182, 153, 0.3);
}

.nav-container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
    box-sizing: border-box;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-links {
    margin-left: 45px;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ===== 全局管理员徽章（导航栏右侧） ===== */
.admin-badge-wrapper {
    display: flex;
    align-items: center;
}

.badge-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 100px;
    font-size: 0.82rem;
    font-weight: 500;
    background: rgba(44, 62, 68, 0.06);
    backdrop-filter: blur(4px);
    border: 1.5px solid rgba(44, 62, 68, 0.12);
    color: rgba(44, 62, 68, 0.85);
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
    font-family: inherit;
    line-height: 1.4;
}

.badge-btn:hover {
    background: rgba(44, 62, 68, 0.10);
    border-color: rgba(44, 62, 68, 0.18);
    color: #1a1a2e;
}

.badge-btn .badge-icon {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

.badge-btn.is-auth {
    background: linear-gradient(135deg, #4A90D9 0%, #357ABD 100%);
    border-color: transparent;
    color: #fff;
    box-shadow: 0 2px 12px rgba(74, 144, 217, 0.35);
}

.badge-btn.is-auth:hover {
    box-shadow: 0 4px 18px rgba(74, 144, 217, 0.5);
    transform: translateY(-1px);
}

.badge-btn.is-auth .badge-icon {
    color: #fff;
}

/* 点头动画 */
@keyframes badge-nod {
    0%, 100% { transform: translateY(0); }
    25% { transform: translateY(-2px); }
    50% { transform: translateY(0); }
    75% { transform: translateY(-1px); }
}
.badge-btn.nod {
    animation: badge-nod 0.4s ease-out;
}

.nav-links a {
    color: rgba(44, 62, 80, 0.9);
    text-decoration: none;
    padding: 10px 20px;
    border-radius: 25px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-weight: 500;
    font-size: 1rem;
    letter-spacing: 0.3px;
    position: relative;
    background: transparent;
    border: 1px solid transparent;
    white-space: nowrap;
}

.nav-links a:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(76, 175, 80, 0.3);
    transform: translateY(-1px);
    color: #2c3e50;
}

.nav-links a:active {
    transform: translateY(0);
    background: rgba(255, 255, 255, 0.3);
}

.nav-links a.active {
    background: rgba(255, 255, 255, 0.35);
    border-color: rgba(76, 175, 80, 0.5);
    color: #2c3e50;
    font-weight: 600;
}

/* ===== 全局遮罩 ===== */
.admin-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.3);
    backdrop-filter: blur(4px);
    z-index: 999;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}
.admin-overlay.show {
    opacity: 1;
    pointer-events: auto;
}

/* ===== 全局管理员弹窗（16px 大圆角） ===== */
.admin-modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.92);
    z-index: 1001;
    background: #fff;
    border-radius: 16px;
    width: 360px;
    padding: 28px 24px 22px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.15);
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-sizing: border-box;
}
.admin-modal.show {
    opacity: 1;
    pointer-events: auto;
    transform: translate(-50%, -50%) scale(1);
}

.admin-modal-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 4px;
}
.admin-modal-header .icon {
    width: 22px;
    height: 22px;
    color: #4A90D9;
    flex-shrink: 0;
}
.admin-modal-header h3 {
    font-size: 1.05rem;
    font-weight: 600;
    color: #1a1a2e;
    margin: 0;
}

.admin-modal-sub {
    font-size: 0.82rem;
    color: #aaa;
    margin: 0 0 18px 0;
    line-height: 1.5;
}

.admin-modal-input {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid #e0e0e0;
    border-radius: 10px;
    font-size: 0.9rem;
    outline: none;
    transition: border-color 0.2s;
    background: #fafafa;
    box-sizing: border-box;
    font-family: inherit;
}
.admin-modal-input:focus {
    border-color: #4A90D9;
    background: #fff;
}

.admin-modal-error {
    font-size: 0.78rem;
    color: #e74c3c;
    margin-top: 6px;
    min-height: 1.2em;
    opacity: 0;
    transition: opacity 0.25s;
}
.admin-modal-error.show {
    opacity: 1;
}

.admin-modal-actions {
    display: flex;
    gap: 10px;
    margin-top: 16px;
}
.admin-modal-actions .btn {
    flex: 1;
    padding: 9px 0;
    border-radius: 10px;
    font-size: 0.88rem;
    font-weight: 500;
    border: none;
    cursor: pointer;
    font-family: inherit;
    transition: all 0.2s;
}

.admin-auth-status {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    background: #f0faf4;
    border-radius: 10px;
    margin-bottom: 18px;
}
.admin-auth-status .check-icon {
    width: 18px;
    height: 18px;
    color: #27ae60;
    flex-shrink: 0;
}
.admin-auth-status span {
    font-size: 0.85rem;
    color: #1a7a3a;
}

/* 弹窗内的图标按钮 */
.admin-modal .btn-close {
    position: absolute;
    top: 14px;
    right: 14px;
    width: 28px;
    height: 28px;
    border: none;
    background: none;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ccc;
    transition: all 0.2s;
    padding: 0;
}
.admin-modal .btn-close:hover {
    background: #f5f5f5;
    color: #666;
}

/* ===== 页脚 ===== */
.footer {
    background: linear-gradient(to right, rgba(255, 182, 153, 0.85), rgba(255, 161, 127, 0.85), rgba(255, 182, 153, 0.85));
    backdrop-filter: blur(8px);
    padding: 20px 0;
    margin-top: 50px;
    box-shadow: 0 -2px 15px rgba(255, 182, 153, 0.2);
}

.footer-content {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 20px;
    box-sizing: border-box;
}

.copyright {
    margin: 0;
    text-align: center;
    font-size: 1rem;
    color: rgba(44, 62, 80, 0.9);
}

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

.copyright span {
    font-size: 1.2rem;
    font-weight: 600;
    cursor: pointer;
    position: relative;
    transition: all 0.2s ease;
}

.copyright span:hover {
    text-shadow: 0 0 8px rgba(255, 255, 255, 0.3);
}

.copyright span:active {
    transform: translateY(1px);
}

/* ===== 移动端适配 ===== */
@media (max-width: 768px) {
    .site-title {
        height: 200px;
    }
    .site-title img {
        height: 200px;
    }
    .site-title h1 {
        font-size: 1.6rem;
    }

    .nav-bar {
        height: auto;
        padding: 8px 0;
    }
    .nav-container {
        padding: 0 10px;
    }
    .nav-links {
        margin-left: 0;
        justify-content: center;
        flex-wrap: wrap;
        gap: 4px;
    }
    .nav-links a {
        padding: 8px 12px;
        font-size: 0.9rem;
    }

    .badge-btn {
        padding: 4px 10px;
        font-size: 0.75rem;
    }
    .badge-btn .badge-icon {
        width: 12px;
        height: 12px;
    }

    .footer {
        margin-top: 30px;
        padding: 15px 0;
    }
    .footer-content {
        padding: 0 15px;
    }
    .copyright {
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .site-title {
        height: 150px;
    }
    .site-title img {
        height: 150px;
    }
    .site-title h1 {
        font-size: 1.2rem;
    }
    .nav-links a {
        padding: 6px 8px;
        font-size: 0.78rem;
    }
}