/* ============================================
   需求发布表单专属样式 - 白底 + 海淇蓝点缀
   复用 style.css 的 :root 变量
   ============================================ */

/* ===== 顶栏（简洁专注式） ===== */
.demand-header {
    background: #ffffff;
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 8px rgba(0, 119, 204, 0.04);
}
.demand-header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 24px;
    max-width: 1200px;
    margin: 0 auto;
    gap: 16px;
}
.demand-back {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: var(--color-text-muted);
    font-size: 14px;
    text-decoration: none;
    transition: color 0.2s;
}
.demand-back:hover { color: var(--color-primary); }

.demand-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}
.demand-logo-mark {
    display: inline-block;
    padding: 4px 10px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: #fff;
    font-size: 14px;
    font-weight: 700;
    border-radius: 6px;
    letter-spacing: 1px;
}
.demand-logo-text {
    color: var(--color-text);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.5px;
}
.demand-header-link {
    color: var(--color-text-muted);
    font-size: 13px;
    text-decoration: none;
    transition: color 0.2s;
}
.demand-header-link:hover { color: var(--color-primary); }

/* ===== 主体 ===== */
.demand-main {
    background: var(--color-dark2);
    padding: 40px 0 80px;
    min-height: calc(100vh - 60px);
}
.demand-main .container { max-width: 900px; }

/* ===== 顶部状态栏 ===== */
.demand-stats {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #fff;
    padding: 18px 28px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-card);
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 12px;
}
.demand-stat-left {
    display: flex;
    align-items: center;
    gap: 10px;
}
.demand-avatars {
    display: flex;
    align-items: center;
}
.demand-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 2px solid #fff;
    margin-left: -8px;
    background: linear-gradient(135deg, #6fa8d6, var(--color-primary));
}
.demand-avatar:first-child { margin-left: 0; }
.demand-avatar-2 { background: linear-gradient(135deg, #b8d8a8, #5a9e5a); }
.demand-avatar-3 { background: linear-gradient(135deg, #e8b8a8, #c97a5a); }
.demand-stat-text {
    font-size: 14px;
    color: var(--color-text-muted);
}
.demand-stat-text strong,
.demand-stat-right strong {
    color: var(--color-primary);
    font-weight: 700;
    font-size: 16px;
}
.demand-stat-num {
    color: var(--color-primary-dark);
    font-size: 18px;
}
.demand-stat-right {
    font-size: 14px;
    color: var(--color-text-muted);
}

/* ===== 表单卡片 ===== */
.demand-form {
    background: #fff;
    padding: 36px 40px 28px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-card);
    border: 1px solid var(--color-border);
}

/* ===== 表单行 ===== */
.form-row {
    display: flex;
    align-items: flex-start;
    margin-bottom: 22px;
    gap: 16px;
}
.form-label {
    flex: 0 0 120px;
    text-align: right;
    font-size: 14px;
    color: var(--color-text);
    font-weight: 500;
    line-height: 38px;
    padding-top: 0;
}
/* 必填项标记 */
.form-label.required::after {
    content: ' *';
    color: #e84545;
    font-weight: 600;
}
.form-label-top {
    line-height: 1.5;
    padding-top: 8px;
}
.form-field {
    flex: 1;
    min-width: 0;
}
.form-hint {
    font-size: 12px;
    color: var(--color-text-muted);
    margin: 0 0 6px;
    line-height: 1.5;
}
.form-hint-highlight {
    color: var(--color-primary-dark);
    font-weight: 500;
}
.contact-hint {
    font-size: 14px;
    color: var(--color-text);
    font-weight: 500;
    padding-top: 8px;
    margin-bottom: 8px;
}
.wechat-notice {
    background: #f0f7ff;
    border-left: 3px solid var(--color-primary);
    border-radius: 4px;
    padding: 10px 14px;
    font-size: 14px;
    color: var(--color-text);
    line-height: 1.6;
    margin-top: -12px;
}
.wechat-notice .highlight-red {
    color: #e84545;
    font-weight: 600;
}

/* ===== 输入框通用 ===== */
.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 10px 14px;
    font-size: 14px;
    font-family: inherit;
    color: var(--color-text);
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
    box-sizing: border-box;
    line-height: 1.5;
}
.form-input::placeholder,
.form-textarea::placeholder {
    color: #9aa3ad;
    font-size: 13px;
}
.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 119, 204, 0.12);
}
.purpose-custom {
    margin-top: 8px;
}
.form-textarea {
    resize: vertical;
    min-height: 120px;
    line-height: 1.6;
}

/* ===== 文件上传区 ===== */
.upload-area {
    border: 2px dashed var(--color-border);
    border-radius: var(--radius);
    padding: 28px 20px;
    text-align: center;
    background: var(--color-dark2);
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
}
.upload-area:hover,
.upload-area.dragover {
    border-color: var(--color-primary);
    background: rgba(0, 119, 204, 0.04);
}
.upload-icon {
    color: var(--color-primary);
    margin-bottom: 8px;
    display: flex;
    justify-content: center;
}
.upload-text {
    font-size: 13px;
    color: var(--color-text-muted);
    line-height: 1.6;
    margin: 0;
}
.upload-link {
    color: var(--color-primary);
    cursor: pointer;
    text-decoration: underline;
}
.upload-filelist {
    margin-top: 12px;
    text-align: left;
}
.upload-filelist:empty { display: none; }
.upload-file-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 10px;
    margin-bottom: 4px;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 12px;
    color: var(--color-text);
}
.upload-file-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.upload-file-size {
    color: var(--color-text-muted);
    margin: 0 10px;
    flex-shrink: 0;
}
.upload-file-remove {
    color: #e84545;
    cursor: pointer;
    padding: 0 4px;
    font-size: 16px;
    line-height: 1;
    flex-shrink: 0;
}

/* ===== 四列字段组 ===== */
.form-grid-4 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
    margin-bottom: 22px;
    margin-left: 136px;
}
.form-cell .form-label {
    flex: none;
    text-align: left;
    display: block;
    line-height: 1.5;
    margin-bottom: 6px;
    padding: 0;
}
.budget-wrap {
    position: relative;
    display: flex;
    align-items: center;
}
.budget-input { padding-right: 42px; }
.budget-unit {
    position: absolute;
    right: 1px;
    top: 1px;
    bottom: 1px;
    display: flex;
    align-items: center;
    padding: 0 12px;
    background: var(--color-dark3);
    color: var(--color-text-muted);
    font-size: 13px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    border-left: 1px solid var(--color-border);
}
.form-select {
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%234a5568' stroke-width='2'><path d='M6 9l6 6 6-6'/></svg>");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 32px;
    cursor: pointer;
}

/* ===== 联系方式三列 ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}
.contact-sub-label {
    display: block;
    font-size: 12px;
    color: var(--color-text-muted);
    margin-bottom: 5px;
}
.code-wrap {
    position: relative;
    display: flex;
    align-items: center;
}
.code-input { padding-right: 100px; }
.code-link {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-primary);
    font-size: 12px;
    text-decoration: none;
    padding: 4px 8px;
    white-space: nowrap;
    transition: opacity 0.2s;
}
.code-link:hover { opacity: 0.8; }
.code-link.disabled {
    color: var(--color-text-muted);
    cursor: not-allowed;
    pointer-events: none;
}

/* ===== 单选按钮 ===== */
.radio-group {
    display: flex;
    align-items: center;
    gap: 28px;
    line-height: 38px;
}
.radio-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    font-size: 14px;
    color: var(--color-text);
    position: relative;
    padding-left: 22px;
    line-height: 1.5;
}
.radio-item input[type="radio"] {
    position: absolute;
    opacity: 0;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
}
.radio-dot {
    width: 16px;
    height: 16px;
    border: 2px solid #c5cdd6;
    border-radius: 50%;
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    background: #fff;
    transition: all 0.2s;
}
.radio-item input[type="radio"]:checked + .radio-dot {
    border-color: var(--color-primary);
    background: #fff;
}
.radio-item input[type="radio"]:checked + .radio-dot::after {
    content: '';
    position: absolute;
    left: 3px;
    top: 3px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-primary);
}

/* ===== 复选框 ===== */
.checkbox-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 14px;
    color: var(--color-text);
    position: relative;
    padding-left: 24px;
    line-height: 38px;
}
.checkbox-item input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
}
.checkbox-box {
    width: 16px;
    height: 16px;
    border: 2px solid #c5cdd6;
    border-radius: 4px;
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    background: #fff;
    transition: all 0.2s;
}
.checkbox-item input[type="checkbox"]:checked + .checkbox-box {
    background: var(--color-primary);
    border-color: var(--color-primary);
}
.checkbox-item input[type="checkbox"]:checked + .checkbox-box::after {
    content: '';
    position: absolute;
    left: 4px;
    top: 1px;
    width: 4px;
    height: 8px;
    border: solid #fff;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}
.help-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border: 1px solid #c5cdd6;
    border-radius: 50%;
    color: var(--color-text-muted);
    font-size: 11px;
    cursor: help;
    margin-left: 8px;
    vertical-align: middle;
    background: #fff;
}

/* ===== 提交按钮 ===== */
.form-submit-row {
    margin-top: 28px;
    text-align: center;
    padding-top: 12px;
    border-top: 1px solid var(--color-border);
}
.submit-btn {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: #fff;
    border: none;
    padding: 12px 56px;
    font-size: 16px;
    font-weight: 500;
    border-radius: var(--radius-pill);
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.2s, opacity 0.2s;
    box-shadow: 0 4px 14px rgba(0, 119, 204, 0.3);
    font-family: inherit;
    letter-spacing: 2px;
}
.submit-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(0, 119, 204, 0.4);
}
.submit-btn:active { transform: translateY(0); }
.submit-btn.loading {
    opacity: 0.7;
    cursor: not-allowed;
    pointer-events: none;
}

/* ===== 底部说明 ===== */
.demand-footer-tip {
    text-align: center;
    font-size: 12px;
    color: var(--color-text-muted);
    margin-top: 20px;
    line-height: 1.6;
}
.demand-link {
    color: var(--color-primary);
    text-decoration: none;
}
.demand-link:hover { text-decoration: underline; }

/* ===== 提交成功提示 ===== */
.demand-toast {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: #fff;
    padding: 28px 40px;
    border-radius: var(--radius);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
    text-align: center;
    z-index: 9999;
    display: none;
    min-width: 280px;
}
.demand-toast.show { display: block; animation: toastIn 0.3s ease; }
@keyframes toastIn {
    from { opacity: 0; transform: translate(-50%, -45%) scale(0.95); }
    to { opacity: 1; transform: translate(-50%, -50%) scale(1); }
}
.demand-toast-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 12px;
    border-radius: 50%;
    background: #5cb85c;
    display: flex;
    align-items: center;
    justify-content: center;
}
.demand-toast-icon::after {
    content: '';
    width: 22px;
    height: 12px;
    border: solid #fff;
    border-width: 0 0 4px 4px;
    transform: rotate(-45deg) translate(2px, -2px);
}
.demand-toast-title {
    font-size: 16px;
    color: var(--color-text);
    font-weight: 600;
    margin-bottom: 6px;
}
.demand-toast-desc {
    font-size: 13px;
    color: var(--color-text-muted);
    line-height: 1.5;
}
.demand-toast-mask {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    z-index: 9998;
    display: none;
}
.demand-toast-mask.show { display: block; }

/* ===== 错误提示 ===== */
.form-input.error,
.form-textarea.error,
.form-select.error {
    border-color: #e84545;
    background: rgba(232, 69, 69, 0.03);
}
.form-error-msg {
    color: #e84545;
    font-size: 12px;
    margin-top: 4px;
    display: none;
}
.form-error-msg.show { display: block; }

/* ===== 移动端适配 ===== */
@media (max-width: 768px) {
    .demand-header-inner {
        padding: 12px 16px;
        gap: 8px;
    }
    .demand-logo-text { display: none; }
    .demand-back span { display: none; }

    .demand-main { padding: 20px 0 60px; }
    .demand-stats {
        padding: 14px 18px;
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    .demand-form { padding: 24px 18px 20px; }

    .form-row {
        flex-direction: column;
        align-items: stretch;
        gap: 6px;
    }
    .form-label {
        flex: none;
        text-align: left;
        line-height: 1.5;
        padding: 0;
    }
    .form-label-top { padding-top: 0; }

    .form-grid-4 {
        grid-template-columns: 1fr 1fr;
        gap: 14px;
        margin-left: 0;
    }
    .contact-grid { grid-template-columns: 1fr; gap: 10px; }

    .submit-btn { width: 100%; padding: 13px 24px; }
}
@media (max-width: 480px) {
    .form-grid-4 { grid-template-columns: 1fr; }
}