/* 联系页面样式：全部使用全站主题变量，跟随主题色与暗色模式 */
    .contact-container {
        max-width: 900px;
        margin: 48px auto 80px;
        padding: 0 12px;
    }
    .contact-card {
        background: var(--panel);
        border-radius: 32px;
        border: 1px solid var(--line);
        padding: 48px;
        box-shadow: var(--card-shadow);
        position: relative;
        overflow: hidden;
    }
    .contact-card::before {
        content: "";
        position: absolute;
        top: -40%;
        right: -10%;
        width: 400px;
        height: 400px;
        background: radial-gradient(circle, var(--primary-a12) 0%, transparent 70%);
        pointer-events: none;
    }
    .contact-header {
        text-align: center;
        margin-bottom: 40px;
        position: relative;
        z-index: 1;
    }
    .contact-icon-header {
        width: 64px;
        height: 64px;
        border-radius: 18px;
        background: linear-gradient(135deg, var(--primary), var(--primary-hover));
        display: inline-flex;
        align-items: center;
        justify-content: center;
        font-size: 32px;
        margin-bottom: 20px;
        box-shadow: 0 16px 32px var(--primary-a3);
    }
    .contact-title {
        font-size: 36px;
        font-weight: 800;
        color: var(--text);
        margin-bottom: 12px;
        letter-spacing: -0.02em;
    }
    .contact-subtitle {
        color: var(--muted);
        font-size: 16px;
        max-width: 520px;
        margin: 0 auto;
    }
    .contact-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
        gap: 20px;
        margin-top: 40px;
        position: relative;
        z-index: 1;
    }
    .contact-item {
        background: var(--table-stripe);
        padding: 28px 24px;
        border-radius: 24px;
        text-align: center;
        border: 1px solid var(--line);
        transition: all 0.25s ease;
        text-decoration: none;
        display: flex;
        flex-direction: column;
        gap: 10px;
    }
    .contact-item:hover {
        transform: translateY(-5px);
        border-color: var(--primary);
        box-shadow: var(--card-shadow-hover);
        background: var(--primary-a08);
    }
    .contact-icon {
        font-size: 36px;
        display: block;
    }
    .contact-label {
        font-size: 13px;
        font-weight: 700;
        color: var(--muted);
        text-transform: uppercase;
        letter-spacing: 0.08em;
        display: block;
    }
    .contact-value {
        font-size: 18px;
        font-weight: 800;
        color: var(--text);
        word-break: break-all;
    }
    .contact-hint {
        font-size: 13px;
        color: var(--muted);
        margin-top: 6px;
    }
    .contact-footer {
        text-align: center;
        margin-top: 40px;
        padding-top: 32px;
        border-top: 1px dashed var(--line);
        position: relative;
        z-index: 1;
    }
    .back-btn {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 12px 24px;
        background: linear-gradient(135deg, var(--primary), var(--primary-hover));
        color: #fff;
        border-radius: 16px;
        text-decoration: none;
        font-weight: 800;
        transition: all 0.2s;
        box-shadow: 0 10px 25px var(--primary-a3);
    }
    .back-btn:hover {
        transform: translateY(-2px);
        box-shadow: 0 16px 32px var(--primary-a4);
    }
    @media (max-width: 640px) {
        .contact-card {
            padding: 32px 24px;
        }
        .contact-title {
            font-size: 28px;
        }
    }
    /* 复制邮箱提示模态框 */
    .copy-modal-mask {
        position: fixed;
        inset: 0;
        background: rgba(15, 23, 42, 0.5);
        backdrop-filter: blur(4px);
        z-index: 99999;
        display: none;
        align-items: center;
        justify-content: center;
        padding: 20px;
    }
    .copy-modal {
        width: 320px;
        background: var(--panel);
        border: 1px solid var(--line);
        border-radius: 20px;
        overflow: hidden;
        box-shadow: var(--card-shadow-hover);
        animation: copy-pop 0.25s ease;
    }
    @keyframes copy-pop {
        from { transform: scale(0.92); opacity: 0; }
        to { transform: scale(1); opacity: 1; }
    }
    .copy-modal-header {
        background: linear-gradient(135deg, var(--primary), var(--primary-hover));
        padding: 24px 16px;
        display: flex;
        justify-content: center;
    }
    .copy-modal-icon {
        width: 56px;
        height: 56px;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.22);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 28px;
    }
    .copy-modal-body {
        text-align: center;
        padding: 22px 24px 20px;
    }
    .copy-modal-body h3 {
        margin: 0 0 8px;
        font-size: 18px;
        font-weight: 800;
        color: var(--text);
    }
    .copy-modal-body p {
        margin: 0;
        font-size: 13px;
        color: var(--muted);
        line-height: 1.7;
    }
    .copy-modal-body b {
        color: var(--primary);
    }
    .copy-modal-close {
        display: block;
        width: 100%;
        padding: 13px;
        border: none;
        background: var(--primary);
        color: #fff;
        font-size: 14px;
        font-weight: 700;
        cursor: pointer;
        transition: background 0.2s;
    }
    .copy-modal-close:hover {
        background: var(--primary-hover);
    }