:root {
    --primary: #2563EB;
    --primary-light: #EFF6FF;
    --primary-dark: #1D4ED8;
    --success: #16A34A;
    --warning: #F59E0B;
    --danger: #DC2626;
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-lg: 0 4px 16px rgba(0,0,0,0.1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background: var(--gray-50);
    color: var(--gray-800);
    font-size: 15px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    max-width: 100vw;
    overflow-x: hidden;
}

.page { display: none; min-height: 100vh; }
.page.active { display: block; }

.header {
    background: linear-gradient(135deg, var(--primary) 0%, #3B82F6 100%);
    padding: 40px 24px 32px;
    color: #fff;
    border-radius: 0 0 24px 24px;
}

.brand-icon {
    width: 48px; height: 48px;
    background: rgba(255,255,255,0.2);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 22px; margin-bottom: 12px;
}

.brand h1 { font-size: 24px; font-weight: 700; margin-bottom: 6px; }
.brand .subtitle { font-size: 14px; opacity: 0.9; }

.content { padding: 20px 16px 32px; }

.section { margin-bottom: 24px; }
.section-title { font-size: 15px; font-weight: 600; color: var(--gray-700); margin-bottom: 12px; }

.identity-grid {
    display: grid; grid-template-columns: 1fr 1fr; gap: 12px;
}

.identity-btn {
    display: flex; flex-direction: column; align-items: center; gap: 8px;
    padding: 20px 12px;
    background: #fff; border: 2px solid var(--gray-200);
    border-radius: var(--radius); cursor: pointer;
    transition: all 0.2s; font-size: 14px; color: var(--gray-600);
}
.identity-btn i { font-size: 24px; color: var(--primary); }
.identity-btn.selected { border-color: var(--primary); background: var(--primary-light); color: var(--primary); }

.category-list { display: flex; flex-direction: column; gap: 10px; }

.category-btn {
    display: flex; align-items: center; gap: 12px;
    padding: 16px; background: #fff;
    border: 1.5px solid var(--gray-200);
    border-radius: var(--radius); cursor: pointer;
    transition: all 0.2s; text-align: left; width: 100%;
}
.category-btn i { font-size: 20px; color: var(--primary); width: 28px; text-align: center; }
.category-btn .cat-info { flex: 1; }
.category-btn .cat-name { font-size: 15px; font-weight: 500; color: var(--gray-800); }
.category-btn .cat-desc { font-size: 12px; color: var(--gray-400); margin-top: 2px; }
.category-btn:active { border-color: var(--primary); background: var(--primary-light); }

/* PLACEHOLDER_MORE_CSS */

.commitment-list { display: flex; flex-direction: column; gap: 10px; }
.commitment-item {
    display: flex; align-items: center; gap: 10px;
    padding: 12px 16px; background: #fff;
    border-radius: var(--radius-sm); font-size: 14px; color: var(--gray-600);
}
.commitment-item i { color: var(--primary); font-size: 16px; width: 20px; text-align: center; }

.page-header {
    display: flex; align-items: center; gap: 12px;
    padding: 16px; background: #fff;
    border-bottom: 1px solid var(--gray-100);
    position: sticky; top: 0; z-index: 10;
}
.page-header h2 { font-size: 17px; font-weight: 600; }
.back-btn {
    width: 36px; height: 36px; border: none; background: var(--gray-100);
    border-radius: 50%; cursor: pointer; font-size: 14px; color: var(--gray-600);
    display: flex; align-items: center; justify-content: center;
}

.tip-bar {
    background: var(--primary-light); border-left: 3px solid var(--primary);
    padding: 12px 14px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-size: 13px; color: var(--primary-dark); margin-bottom: 20px; line-height: 1.7;
}

.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 14px; font-weight: 500; color: var(--gray-700); margin-bottom: 8px; }
.label-hint { font-weight: 400; color: var(--gray-400); font-size: 12px; }
.required { color: var(--danger); }
.field-hint { font-size: 12px; color: var(--gray-400); margin-top: 6px; }

textarea, input[type="text"], input[type="tel"], select {
    width: 100%; padding: 12px 14px; border: 1.5px solid var(--gray-200);
    border-radius: var(--radius-sm); font-size: 15px; color: var(--gray-800);
    background: #fff; transition: border-color 0.2s; outline: none;
    -webkit-appearance: none;
}
textarea:focus, input:focus, select:focus { border-color: var(--primary); }
textarea { resize: vertical; min-height: 100px; }
select { color: var(--gray-400); }
select:valid { color: var(--gray-800); }

.inline-fields { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 10px; }

.upload-area { margin-top: 8px; }
.upload-preview { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 10px; }
.upload-preview .preview-item {
    width: 72px; height: 72px; border-radius: var(--radius-sm);
    overflow: hidden; position: relative; border: 1px solid var(--gray-200);
}
.upload-preview .preview-item img { width: 100%; height: 100%; object-fit: cover; }
.upload-preview .preview-item .remove-img {
    position: absolute; top: 2px; right: 2px; width: 20px; height: 20px;
    background: rgba(0,0,0,0.5); color: #fff; border: none;
    border-radius: 50%; font-size: 10px; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
}
.upload-btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 12px 20px; background: var(--gray-100);
    border: 1.5px dashed var(--gray-300); border-radius: var(--radius-sm);
    cursor: pointer; font-size: 14px; color: var(--gray-500);
}
.upload-btn i { font-size: 18px; color: var(--primary); }

.extra-info-toggle {
    padding: 14px 0; font-size: 14px; color: var(--primary);
    cursor: pointer; border-top: 1px solid var(--gray-100); margin-top: 8px;
}
.extra-info-toggle.open i { transform: rotate(180deg); }
.extra-info { padding-top: 12px; }
.extra-info .form-group { margin-bottom: 10px; }
.extra-info input, .extra-info select { padding: 10px 12px; font-size: 14px; }

.btn-primary {
    width: 100%; padding: 14px; background: var(--primary);
    color: #fff; border: none; border-radius: var(--radius);
    font-size: 16px; font-weight: 600; cursor: pointer;
    transition: background 0.2s; margin-top: 12px;
}
.btn-primary:active { background: var(--primary-dark); }
.btn-primary:disabled { background: var(--gray-300); cursor: not-allowed; }

.btn-secondary {
    width: 100%; padding: 14px; background: #fff;
    color: var(--primary); border: 1.5px solid var(--primary);
    border-radius: var(--radius); font-size: 15px; font-weight: 500;
    cursor: pointer; transition: all 0.2s; margin-top: 10px;
}
.btn-secondary:active { background: var(--primary-light); }

.success-content { text-align: center; padding-top: 60px; }
.success-icon { font-size: 64px; color: var(--success); margin-bottom: 20px; }
.success-content h3 { font-size: 20px; margin-bottom: 12px; }
.feedback-code {
    background: var(--gray-100); padding: 12px 16px;
    border-radius: var(--radius-sm); margin: 16px 0; font-size: 14px;
}
.success-hint { font-size: 14px; color: var(--gray-500); margin-bottom: 30px; }

.feedback-list { margin-top: 20px; }
.feedback-item {
    background: #fff; border-radius: var(--radius); padding: 16px;
    margin-bottom: 12px; box-shadow: var(--shadow); cursor: pointer;
}
.feedback-item .fi-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.feedback-item .fi-code { font-size: 12px; color: var(--gray-400); }
.feedback-item .fi-status { font-size: 12px; padding: 3px 8px; border-radius: 10px; }
.status-pending { background: #FEF3C7; color: #92400E; }
.status-processing { background: #DBEAFE; color: #1E40AF; }
.status-replied { background: #D1FAE5; color: #065F46; }
.status-resolved { background: var(--gray-100); color: var(--gray-500); }
.feedback-item .fi-title { font-size: 15px; font-weight: 500; margin-bottom: 6px; }
.feedback-item .fi-meta { font-size: 12px; color: var(--gray-400); }

.detail-status {
    background: #fff; padding: 16px; border-radius: var(--radius);
    margin-bottom: 16px; box-shadow: var(--shadow);
}
.detail-status .ds-label { font-size: 12px; color: var(--gray-400); margin-bottom: 4px; }
.detail-status .ds-value { font-size: 16px; font-weight: 600; }

.detail-info {
    background: #fff; padding: 16px; border-radius: var(--radius);
    margin-bottom: 16px; box-shadow: var(--shadow);
}
.detail-info .di-row { display: flex; margin-bottom: 8px; font-size: 14px; }
.detail-info .di-label { color: var(--gray-400); width: 70px; flex-shrink: 0; }
.detail-info .di-value { color: var(--gray-700); flex: 1; }
.detail-info .di-images { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.detail-info .di-images img { width: 64px; height: 64px; object-fit: cover; border-radius: 6px; border: 1px solid var(--gray-200); }

.detail-timeline {
    background: #fff; padding: 16px; border-radius: var(--radius);
    margin-bottom: 16px; box-shadow: var(--shadow);
}
.detail-timeline h4 { font-size: 14px; margin-bottom: 12px; color: var(--gray-700); }
.timeline-item { display: flex; gap: 10px; margin-bottom: 12px; font-size: 13px; }
.timeline-item .tl-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--primary); margin-top: 5px; flex-shrink: 0; }
.timeline-item .tl-time { color: var(--gray-400); width: 60px; flex-shrink: 0; }
.timeline-item .tl-text { color: var(--gray-600); }

.detail-reply {
    background: #fff; padding: 16px; border-radius: var(--radius);
    margin-bottom: 16px; box-shadow: var(--shadow);
}
.detail-reply h4 { font-size: 14px; margin-bottom: 12px; color: var(--gray-700); }
.reply-item { padding: 12px; background: var(--gray-50); border-radius: var(--radius-sm); margin-bottom: 10px; }
.reply-item.from-staff { border-left: 3px solid var(--primary); }
.reply-item.from-user { border-left: 3px solid var(--success); }
.reply-item .ri-sender { font-size: 12px; color: var(--gray-400); margin-bottom: 4px; }
.reply-item .ri-content { font-size: 14px; color: var(--gray-700); }
.reply-item .ri-time { font-size: 11px; color: var(--gray-400); margin-top: 6px; }

.toast {
    position: fixed; top: 50%; left: 50%; transform: translate(-50%, -50%);
    background: rgba(0,0,0,0.75); color: #fff; padding: 14px 24px;
    border-radius: var(--radius-sm); font-size: 14px; z-index: 999;
    opacity: 0; transition: opacity 0.3s; pointer-events: none;
}
.toast.show { opacity: 1; }

.loading {
    position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(255,255,255,0.7); z-index: 998;
    display: none; align-items: center; justify-content: center;
}
.loading.show { display: flex; }
.loading-spinner {
    width: 36px; height: 36px; border: 3px solid var(--gray-200);
    border-top-color: var(--primary); border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.empty-state { text-align: center; padding: 40px 20px; color: var(--gray-400); font-size: 14px; }
.empty-state i { font-size: 40px; margin-bottom: 12px; color: var(--gray-300); }