/* ========================================
   法律文书智能生成系统 - 主样式文件
   专业版 v2.0 - 优化精简版
   ======================================== */

/* ==================== 基础重置 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ==================== CSS变量定义 ==================== */
:root {
    /* 主色调 - 专业蓝 */
    --primary-50: #eff6ff;
    --primary-100: #dbeafe;
    --primary-200: #bfdbfe;
    --primary-500: #3b82f6;
    --primary-600: #2563eb;
    --primary-700: #1d4ed8;
    --primary-800: #1e40af;

    /* 功能色 */
    --success: #10b981;
    --success-light: #d1fae5;
    --danger: #ef4444;
    --danger-light: #fee2e2;
    --warning: #f59e0b;
    --warning-light: #fef3c7;

    /* 中性色 */
    --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;
    --gray-900: #111827;

    /* 语义化颜色 */
    --primary-color: var(--primary-600);
    --primary-hover: var(--primary-700);
    --success-color: var(--success);
    --danger-color: var(--danger);
    --warning-color: var(--warning);
    --text-color: var(--gray-800);
    --text-secondary: var(--gray-500);
    --border-color: var(--gray-200);
    --bg-color: var(--gray-50);
    --white: #ffffff;

    /* 阴影系统 */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

    /* 圆角系统 */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* 过渡动画 */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition: var(--transition-base);
}

/* ==================== 全局样式 ==================== */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial,
                 "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-color);
    background: linear-gradient(180deg, var(--gray-50) 0%, var(--white) 100%);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ==================== 头部 ==================== */
.header {
    background: linear-gradient(135deg, #1e3a8a 0%, var(--primary-600) 50%, var(--primary-500) 100%);
    color: var(--white);
    padding: 48px 0;
    box-shadow: var(--shadow-xl);
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.logo {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 12px;
    position: relative;
    letter-spacing: -0.5px;
}

.logo-icon {
    width: 42px;
    height: 42px;
    filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.15));
}

.tagline {
    font-size: 16px;
    opacity: 0.95;
    margin-left: 56px;
    font-weight: 400;
    letter-spacing: 0.3px;
}

/* ==================== 主内容区 ==================== */
.main-content {
    padding: 48px 0 80px;
    min-height: calc(100vh - 200px);
}

/* ==================== 进度条 ==================== */
.progress-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 48px;
    padding: 36px 24px;
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
}

.progress-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.progress-step:hover {
    transform: translateY(-2px);
}

.step-number {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-full);
    background: var(--white);
    border: 3px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 20px;
    color: var(--gray-400);
    transition: all var(--transition-base);
    margin-bottom: 10px;
    box-shadow: var(--shadow-xs);
}

.step-label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all var(--transition-base);
}

.progress-step.active .step-number {
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-500) 100%);
    color: var(--white);
    border-color: var(--primary-600);
    transform: scale(1.12);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

.progress-step.active .step-label {
    color: var(--primary-600);
    font-weight: 600;
}

.progress-step.completed .step-number {
    background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
    color: var(--white);
    border-color: var(--success);
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}

.progress-step.completed .step-label {
    color: var(--success);
}

.progress-line {
    width: 100px;
    height: 3px;
    background: var(--gray-200);
    margin: 0 16px;
    margin-bottom: 40px;
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.progress-step.completed + .progress-line {
    background: linear-gradient(90deg, var(--success) 0%, #059669 100%);
}

/* ==================== 表单区域 ==================== */
.lawsuit-form {
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    padding: 48px;
    border: 1px solid var(--gray-100);
}

.form-section {
    display: none;
}

.form-section.active {
    display: block;
    animation: fadeInUp 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.section-header {
    margin-bottom: 36px;
    padding-bottom: 24px;
    border-bottom: 2px solid var(--gray-100);
}

.section-header h2 {
    font-size: 28px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.section-desc {
    font-size: 15px;
    color: var(--primary-700);
    font-weight: 600;
    background: linear-gradient(135deg, var(--primary-50) 0%, var(--primary-100) 100%);
    padding: 14px 18px;
    border-radius: var(--radius-md);
    border-left: 4px solid var(--primary-600);
    box-shadow: var(--shadow-xs);
}

/* ==================== 按钮系统 ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    outline: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:active::before {
    width: 300px;
    height: 300px;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-500) 100%);
    color: var(--white);
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.25);
}

.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--primary-700) 0%, var(--primary-600) 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(59, 130, 246, 0.35);
}

.btn-secondary {
    background: var(--white);
    color: var(--gray-700);
    border: 2px solid var(--gray-300);
    box-shadow: var(--shadow-xs);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--gray-50);
    border-color: var(--gray-400);
    transform: translateY(-1px);
}

.btn-success {
    background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
    color: var(--white);
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.25);
}

.btn-success:hover:not(:disabled) {
    background: linear-gradient(135deg, #059669 0%, #047857 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(16, 185, 129, 0.35);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger) 0%, #dc2626 100%);
    color: var(--white);
    box-shadow: 0 2px 8px rgba(239, 68, 68, 0.25);
}

.btn-danger:hover:not(:disabled) {
    background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);
    transform: translateY(-2px);
}

.btn-outline-danger {
    background: var(--white);
    color: var(--danger);
    border: 2px solid var(--danger);
    padding: 10px 22px;
    font-size: 14px;
    box-shadow: var(--shadow-xs);
}

.btn-outline-danger:hover:not(:disabled) {
    background: var(--danger);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.btn-large {
    padding: 16px 48px;
    font-size: 18px;
    border-radius: var(--radius-lg);
}

.btn-icon {
    width: 20px;
    height: 20px;
    stroke-width: 2.5;
}

.btn-outline-danger .btn-icon {
    width: 16px;
    height: 16px;
}

.form-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 40px;
    padding-top: 32px;
    border-top: 2px solid var(--gray-100);
    gap: 12px;
    flex-wrap: wrap;
}

/* ==================== 加载动画 ==================== */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(30, 58, 138, 0.95) 0%, rgba(37, 99, 235, 0.95) 100%);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-spinner {
    text-align: center;
    color: var(--white);
}

.spinner {
    width: 72px;
    height: 72px;
    border: 5px solid rgba(255, 255, 255, 0.2);
    border-top-color: var(--white);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 28px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-text {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    letter-spacing: 0.5px;
}

.loading-hint {
    font-size: 15px;
    opacity: 0.9;
    font-weight: 400;
}

/* ==================== Toast提示 ==================== */
.toast {
    position: fixed;
    top: 24px;
    right: 24px;
    padding: 18px 28px;
    border-radius: var(--radius-lg);
    background: var(--white);
    box-shadow: var(--shadow-2xl);
    z-index: 10000;
    transform: translateX(400px);
    transition: transform var(--transition-slow);
    max-width: 420px;
    font-weight: 500;
    border: 1px solid var(--gray-200);
}

.toast.show {
    transform: translateX(0);
    animation: slideInRight 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideInRight {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast.success { border-left: 5px solid var(--success); }
.toast.error { border-left: 5px solid var(--danger); }
.toast.warning { border-left: 5px solid var(--warning); }
.toast.info { border-left: 5px solid var(--primary-600); }

/* ==================== 结果区域 ==================== */
.result-section {
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    padding: 56px;
    border: 1px solid var(--gray-100);
    animation: fadeInUp 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.result-card {
    text-align: center;
}

.result-icon {
    width: 96px;
    height: 96px;
    margin: 0 auto 28px;
    animation: scaleIn 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes scaleIn {
    from {
        transform: scale(0);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.result-icon svg {
    width: 100%;
    height: 100%;
    filter: drop-shadow(0 4px 12px rgba(16, 185, 129, 0.3));
}

.result-card.success .result-icon {
    color: var(--success);
}

.result-card h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 14px;
    color: var(--gray-900);
    letter-spacing: -0.5px;
}

.result-card p {
    font-size: 17px;
    color: var(--text-secondary);
    margin-bottom: 36px;
    font-weight: 400;
}

.download-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-width: 640px;
    margin: 0 auto 36px;
}

.download-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.download-item:hover {
    border-color: var(--primary-300);
    background: var(--primary-50);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.download-info {
    display: flex;
    align-items: center;
    gap: 16px;
}

.download-icon {
    width: 44px;
    height: 44px;
    color: var(--primary-600);
}

.download-name {
    font-weight: 600;
    font-size: 17px;
    color: var(--gray-800);
}

.result-actions {
    margin-top: 40px;
}

/* ==================== 隐私保护横幅 ==================== */
.privacy-banner {
    background: linear-gradient(135deg, var(--primary-50) 0%, var(--primary-100) 100%);
    border-bottom: 3px solid var(--primary-400);
    padding: 20px 0;
    position: relative;
    box-shadow: var(--shadow-sm);
    animation: slideDown 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.privacy-banner.collapsed .privacy-banner-details {
    display: none;
}

.privacy-banner.hidden {
    display: none;
}

.privacy-banner-content {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    position: relative;
}

.privacy-banner-text {
    flex: 1;
}

.privacy-banner-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
    cursor: pointer;
    user-select: none;
}

.privacy-banner-title strong {
    font-size: 19px;
    color: var(--primary-800);
    font-weight: 700;
}

.privacy-banner-details {
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.privacy-points {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.privacy-point:nth-child(5) {
    grid-column: 1 / -1;
}

.privacy-point {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14.5px;
    color: var(--primary-900);
    font-weight: 500;
    padding: 8px 12px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: var(--radius-sm);
}

.check-icon {
    width: 20px;
    height: 20px;
    color: var(--success);
    flex-shrink: 0;
    stroke-width: 3;
}

.privacy-banner-close {
    position: absolute;
    top: 0;
    right: 0;
    background: none;
    border: none;
    padding: 10px;
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.privacy-banner-close:hover {
    background: rgba(239, 68, 68, 0.15);
    transform: rotate(90deg);
}

.privacy-banner-close svg {
    width: 22px;
    height: 22px;
    color: var(--danger);
    stroke-width: 2.5;
}

/* ==================== 确认对话框 ==================== */
.confirm-dialog-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(17, 24, 39, 0.7);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    opacity: 0;
    transition: opacity var(--transition-slow);
}

.confirm-dialog-overlay.show {
    opacity: 1;
}

.confirm-dialog {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: 40px;
    max-width: 480px;
    width: 90%;
    box-shadow: var(--shadow-2xl);
    transform: scale(0.9);
    transition: transform var(--transition-slow);
    text-align: center;
    border: 1px solid var(--gray-200);
}

.confirm-dialog-overlay.show .confirm-dialog {
    transform: scale(1);
    animation: bounceIn 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes bounceIn {
    0% {
        transform: scale(0.3);
        opacity: 0;
    }
    50% {
        transform: scale(1.05);
    }
    70% {
        transform: scale(0.9);
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.confirm-dialog-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 24px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
}

.confirm-dialog-warning .confirm-dialog-icon {
    background: linear-gradient(135deg, var(--warning-light) 0%, #fde68a 100%);
    color: var(--warning);
}

.confirm-dialog-error .confirm-dialog-icon {
    background: linear-gradient(135deg, var(--danger-light) 0%, #fecaca 100%);
    color: var(--danger);
}

.confirm-dialog-info .confirm-dialog-icon {
    background: linear-gradient(135deg, var(--primary-100) 0%, var(--primary-200) 100%);
    color: var(--primary-600);
}

.confirm-dialog-icon svg {
    width: 40px;
    height: 40px;
    stroke-width: 2.5;
}

.confirm-dialog-message {
    font-size: 17px;
    color: var(--gray-700);
    line-height: 1.7;
    margin-bottom: 32px;
    font-weight: 500;
}

.confirm-dialog-actions {
    display: flex;
    justify-content: center;
    gap: 12px;
}

.confirm-dialog-actions .btn {
    padding: 13px 40px;
    font-size: 16px;
    min-width: 130px;
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }

    .header {
        padding: 36px 0;
    }

    .logo {
        font-size: 26px;
    }

    .logo-icon {
        width: 36px;
        height: 36px;
    }

    .tagline {
        font-size: 14px;
        margin-left: 52px;
    }

    .lawsuit-form {
        padding: 32px 20px;
        border-radius: var(--radius-lg);
    }

    .section-header h2 {
        font-size: 24px;
    }

    .progress-bar {
        padding: 24px 16px;
        border-radius: var(--radius-lg);
    }

    .step-number {
        width: 48px;
        height: 48px;
        font-size: 18px;
    }

    .step-label {
        font-size: 13px;
    }

    .progress-line {
        width: 50px;
        margin: 0 8px;
        margin-bottom: 32px;
    }

    .form-actions {
        flex-direction: column;
        gap: 12px;
    }

    .btn {
        width: 100%;
    }

    .result-section {
        padding: 36px 24px;
    }

    .result-card h2 {
        font-size: 26px;
    }

    .privacy-banner {
        padding: 16px 0;
    }

    .privacy-banner-content {
        gap: 16px;
    }

    .privacy-banner-title strong {
        font-size: 17px;
    }

    .privacy-points {
        grid-template-columns: 1fr;
    }

    .privacy-point {
        font-size: 13.5px;
    }

    .confirm-dialog {
        padding: 32px 24px;
        width: 85%;
    }

    .confirm-dialog-icon {
        width: 64px;
        height: 64px;
    }

    .confirm-dialog-icon svg {
        width: 36px;
        height: 36px;
    }

    .confirm-dialog-message {
        font-size: 16px;
    }

    .confirm-dialog-actions {
        flex-direction: column;
    }

    .confirm-dialog-actions .btn {
        width: 100%;
        min-width: auto;
    }
}