/* reset & base - 极简风格，无任何卡通元素 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: #f5f5f5;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.5;
    color: #1e2a3a;
    padding: 2rem 1rem;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: #ffffff;
    border-radius: 24px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02), 0 1px 2px rgba(0, 0, 0, 0.05);
    overflow: hidden;
    padding: 2rem;
}

/* 头部 */
.site-header {
    padding-bottom: 1.5rem;
    margin-bottom: 1rem;
    border-bottom: 1px solid #eaeef2;
}

.domain {
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: -0.2px;
    color: #4a5c6c;
}

/* 三模块网格布局 */
.modules-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin: 1rem 0 1.5rem;
}

.card {
    background: #ffffff;
    border-radius: 20px;
    border: 1px solid #eef2f5;
    padding: 1.5rem;
    transition: box-shadow 0.2s ease;
}

.card:hover {
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.03);
}

.card-title {
    font-size: 1.4rem;
    font-weight: 500;
    margin-bottom: 1.25rem;
    letter-spacing: -0.3px;
    color: #1f2f3a;
    border-left: 3px solid #9aaebf;
    padding-left: 0.75rem;
}

/* 留言表单 */
.add-message-form {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    margin-bottom: 1.8rem;
}

.add-message-form input,
.add-message-form textarea {
    padding: 0.7rem 1rem;
    border: 1px solid #dce5ea;
    border-radius: 14px;
    font-size: 0.9rem;
    font-family: inherit;
    background: #fff;
    transition: 0.2s;
}

.add-message-form input:focus,
.add-message-form textarea:focus {
    outline: none;
    border-color: #8aa0ae;
    box-shadow: 0 0 0 2px rgba(138, 160, 174, 0.1);
}

.btn-submit {
    background: #2c3e44;
    color: white;
    border: none;
    padding: 0.7rem;
    border-radius: 40px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s;
    font-size: 0.9rem;
}

.btn-submit:hover {
    background: #1f2e35;
}

.btn-edit {
    background: none;
    border: 1px solid #cbdbe0;
    padding: 0.2rem 0.7rem;
    border-radius: 30px;
    font-size: 0.7rem;
    cursor: pointer;
    color: #4f6f7f;
    transition: 0.1s;
}

.btn-edit:hover {
    background: #f0f4f7;
    border-color: #8aa0ae;
}

/* 留言列表样式 */
.messages-list {
    max-height: 460px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.message-item {
    background: #fafcfd;
    border-radius: 16px;
    padding: 1rem;
    border: 1px solid #edf2f5;
}

.message-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 0.4rem;
}

.message-nickname {
    font-weight: 600;
    color: #2c3e44;
    font-size: 0.9rem;
}

.message-time {
    font-size: 0.7rem;
    color: #8e9eab;
}

.message-content {
    margin: 0.5rem 0 0.6rem;
    word-break: break-word;
    font-size: 0.9rem;
    color: #1e2a38;
    line-height: 1.45;
}

.message-actions {
    display: flex;
    justify-content: flex-end;
}

.loading-placeholder,
.empty-placeholder {
    text-align: center;
    padding: 2rem;
    color: #8ba0ae;
    font-size: 0.85rem;
}

/* 编辑留言内嵌表单 */
.edit-form {
    margin-top: 0.5rem;
    padding-top: 0.5rem;
    border-top: 1px dashed #e2e9ef;
}

.edit-form textarea {
    width: 100%;
    padding: 0.5rem;
    border-radius: 12px;
    border: 1px solid #ccdae2;
    font-size: 0.85rem;
    font-family: inherit;
}

.edit-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.edit-actions button {
    background: none;
    border: 1px solid #cbd5e1;
    border-radius: 20px;
    padding: 0.2rem 1rem;
    cursor: pointer;
    font-size: 0.75rem;
}

.save-edit {
    background: #2c3e44 !important;
    color: white;
    border-color: #2c3e44 !important;
}

.cancel-edit {
    background: white;
}

/* 个人简介 & 联系方式  */
.bio-content,
.contact-content {
    font-size: 0.95rem;
    color: #000000;
    line-height: 1.6;
}

.placeholder-text {
    color: #b7c9d4;
    font-style: normal;
}

footer {
    text-align: center;
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid #eef2f5;
    font-size: 0.7rem;
    color: #9cafbb;
}

/* 响应式微调 */
@media (max-width: 740px) {
    .container {
        padding: 1.2rem;
    }

.card {
        padding: 1.2rem;
    }
}

.message-actions {
    display: flex;
    gap: 0.5rem;
    justify-content: flex-end;
    margin-top: 0.5rem;
}
.btn-delete {
    background: none;
    border: 1px solid #e0b3b3;
    padding: 0.2rem 0.7rem;
    border-radius: 30px;
    font-size: 0.7rem;
    cursor: pointer;
    color: #b34e4e;
    transition: 0.1s;
}
.btn-delete:hover {
    background: #fbeaea;
    border-color: #b34e4e;
}