/* 
 * 前端主样式 - 商业计划生成器
 */

/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

a {
    text-decoration: none;
    color: inherit;
}

/* 头部导航 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: #fff;
    z-index: 1000;
    border-bottom: 1px solid #f0f0f0;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 26px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 6px;
}

.logo-biz {
    background: linear-gradient(135deg, #1a1a2e 0%, #2d2d44 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.logo-planr {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.logo-planr::before {
    content: '';
    width: 6px;
    height: 6px;
    background: linear-gradient(135deg, #f97316, #ea580c);
    border-radius: 50%;
}

.logo-planr span {
    background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
    font-size: 24px;
    letter-spacing: 1px;
}

.nav {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    color: #333;
    font-size: 15px;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-link:hover {
    color: #f97316;
}

.nav-user {
    font-size: 14px;
    color: #78716c;
    font-weight: 500;
}

.btn-outline-nav {
    background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
    border: none;
    color: #fff;
    padding: 10px 22px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s;
    text-decoration: none;
    box-shadow: 0 4px 12px rgba(249, 115, 22, 0.3);
}

.btn-outline-nav:hover {
    background: linear-gradient(135deg, #ea580c 0%, #dc2626 100%);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(249, 115, 22, 0.4);
}

.dropdown-arrow {
    font-size: 12px;
    margin-left: 4px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 24px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
    color: #fff;
    box-shadow: 0 4px 16px rgba(249, 115, 22, 0.35);
    border: none;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #ea580c 0%, #dc2626 100%);
    box-shadow: 0 6px 24px rgba(249, 115, 22, 0.45);
    transform: translateY(-1px);
}

/* 主要内容 */
.main {
    padding-top: 80px;
    background: linear-gradient(180deg, #fff 0%, #fffaf7 30%, #fff7ed 60%, #fff 100%);
}

.hero {
    text-align: center;
    padding: 100px 24px 80px;
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(249,115,22,0.06) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

.hero > * {
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: linear-gradient(135deg, #fff7ed 0%, #ffedd5 100%);
    padding: 12px 24px;
    border-radius: 50px;
    margin-bottom: 32px;
    border: 1px solid rgba(249,115,22,0.2);
    box-shadow: 0 4px 16px rgba(249,115,22,0.1);
}

.badge-text {
    color: #ea580c;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.badge-icon {
    color: #f97316;
    font-size: 18px;
    animation: sparkle 2s ease-in-out infinite;
}

@keyframes sparkle {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(1.2); }
}

.hero-title {
    font-size: 52px;
    font-weight: 800;
    line-height: 1.3;
    color: #1a1a2e;
    margin-bottom: 48px;
    letter-spacing: -1px;
}

.hero-title .highlight {
    background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 输入框区域 */
.input-container {
    max-width: 680px;
    margin: 0 auto;
}

.input-wrapper {
    position: relative;
    background: #fff;
    border-radius: 20px;
    box-shadow: 0 8px 40px rgba(249, 115, 22, 0.12), 0 2px 8px rgba(0,0,0,0.04);
    border: 2px solid transparent;
    background-image: linear-gradient(#fff, #fff), linear-gradient(135deg, #fed7aa, #fdba74);
    background-origin: border-box;
    background-clip: padding-box, border-box;
    transition: all 0.3s;
}

.input-wrapper:hover,
.input-wrapper:focus-within {
    box-shadow: 0 12px 48px rgba(249, 115, 22, 0.18), 0 4px 12px rgba(0,0,0,0.06);
    background-image: linear-gradient(#fff, #fff), linear-gradient(135deg, #f97316, #ea580c);
}

.idea-input {
    width: 100%;
    padding: 32px;
    padding-right: 80px;
    border: none;
    border-radius: 18px;
    font-size: 17px;
    line-height: 1.7;
    resize: none;
    outline: none;
    font-family: inherit;
    min-height: 150px;
    background: transparent;
}

.idea-input::placeholder {
    color: #9ca3af;
}

.submit-btn {
    position: absolute;
    right: 20px;
    bottom: 20px;
    width: 52px;
    height: 52px;
    background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
    border: none;
    border-radius: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
    box-shadow: 0 4px 16px rgba(249,115,22,0.4);
}

.submit-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 24px rgba(249,115,22,0.5);
}

.submit-icon {
    color: #fff;
    font-size: 18px;
}

/* 价值主张区域 */
.value-section {
    background: linear-gradient(180deg, #fffbeb 0%, #fef3c7 100%);
    padding: 64px 24px;
}

.value-container {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.value-stat {
    font-size: 24px;
    color: #1a1a2e;
    margin-bottom: 20px;
    font-weight: 500;
}

.value-stat strong {
    font-size: 32px;
    font-weight: 800;
    background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.value-divider {
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, #f97316, #fb923c);
    margin: 0 auto 20px;
    border-radius: 2px;
}

.value-desc {
    font-size: 17px;
    color: #78716c;
    line-height: 1.9;
    max-width: 720px;
    margin: 0 auto;
}

.partners-logos {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
    max-width: 1000px;
    margin: 0 auto;
}

.partner-logo {
    opacity: 0.6;
}

.logo-text {
    font-size: 20px;
    color: #666;
}

.logo-inc {
    font-family: Georgia, serif;
    font-size: 32px;
    font-weight: 700;
}

.logo-bi {
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 2px;
    line-height: 1.2;
}

.logo-ent {
    font-family: Georgia, serif;
    font-style: italic;
    font-size: 22px;
}

.logo-inv {
    font-size: 16px;
}

.logo-ph {
    font-size: 16px;
}

/* ========== 表单页面样式 ========== */

.plan-page {
    display: flex;
    min-height: 100vh;
    padding-top: 70px;
    background: linear-gradient(180deg, #fffaf7 0%, #fff 100%);
}

/* 简化头部 */
.header-simple {
    border-bottom: none;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
}

.header-simple .nav {
    gap: 0;
}

/* 左侧步骤导航 */
.sidebar {
    width: 320px;
    background: linear-gradient(180deg, #fff 0%, #fffaf7 100%);
    padding: 48px 28px;
    border-right: 1px solid rgba(249,115,22,0.1);
    flex-shrink: 0;
}

.step-list {
    list-style: none;
}

.step-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 18px 20px;
    border-radius: 14px;
    cursor: pointer;
    transition: all 0.3s;
    margin-bottom: 10px;
    border: 1px solid transparent;
}

.step-item:hover {
    background: #fff;
    box-shadow: 0 4px 16px rgba(249,115,22,0.08);
}

.step-item.active {
    background: linear-gradient(135deg, #fff7ed 0%, #ffedd5 100%);
    border-color: rgba(249,115,22,0.2);
    box-shadow: 0 4px 20px rgba(249,115,22,0.12);
}

.step-item.active .step-icon {
    background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.step-item.active .step-text {
    color: #ea580c;
    font-weight: 700;
}

.step-icon {
    font-size: 24px;
    color: #9ca3af;
    width: 32px;
    text-align: center;
}

.step-text {
    font-size: 17px;
    color: #666;
}

/* 右侧内容区 */
.content {
    flex: 1;
    padding: 48px 60px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.content-inner {
    width: 100%;
    max-width: 720px;
}

.page-header {
    text-align: center;
    margin-bottom: 56px;
    width: 100%;
    max-width: 720px;
}

.page-title {
    font-size: 42px;
    font-weight: 800;
    color: #1a1a2e;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.page-subtitle {
    font-size: 17px;
    color: #78716c;
    line-height: 1.7;
}

/* 表单样式 */
.form-group {
    margin-bottom: 32px;
}

.form-label {
    display: block;
    font-size: 16px;
    font-weight: 700;
    color: #1a1a2e;
    margin-bottom: 12px;
}

.form-label .required {
    color: #f97316;
    margin-left: 4px;
    font-weight: 600;
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 16px 20px;
    border: 2px solid #e5e7eb;
    border-radius: 14px;
    font-size: 15px;
    font-family: inherit;
    transition: all 0.3s;
    background: #fff;
}

.form-input:hover,
.form-textarea:hover,
.form-select:hover {
    border-color: #fed7aa;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: #f97316;
    box-shadow: 0 0 0 4px rgba(249, 115, 22, 0.1), 0 4px 16px rgba(249, 115, 22, 0.08);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: #9ca3af;
}

.form-textarea {
    resize: vertical;
    min-height: 130px;
    line-height: 1.7;
}

.form-select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f97316' stroke-width='2'%3E%3Cpolyline points='6,9 12,15 18,9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 18px center;
    padding-right: 50px;
}

.char-count {
    font-size: 14px;
    color: #9ca3af;
    margin-top: 10px;
}

/* 按钮组 */
.form-actions {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 48px;
}

.btn-lg {
    padding: 16px 48px;
    font-size: 17px;
    border-radius: 14px;
    font-weight: 600;
}

.btn-secondary {
    background: linear-gradient(135deg, #f3f4f6 0%, #e5e7eb 100%);
    color: #374151;
    border: 1px solid #e5e7eb;
}

.btn-secondary:hover {
    background: linear-gradient(135deg, #e5e7eb 0%, #d1d5db 100%);
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

/* Radio按钮组 */
.radio-group {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    margin-top: 12px;
}

.radio-label {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 15px;
    color: #374151;
    padding: 12px 20px;
    background: #fff;
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    transition: all 0.3s;
}

.radio-label:hover {
    border-color: #fed7aa;
    background: #fffaf7;
}

.radio-label input[type="radio"] {
    display: none;
}

.radio-label input[type="radio"]:checked + .radio-circle + .radio-text {
    color: #ea580c;
    font-weight: 600;
}

.radio-text {
    white-space: nowrap;
}

.radio-circle {
    width: 20px;
    height: 20px;
    min-width: 20px;
    border: 2px solid #d1d5db;
    border-radius: 50%;
    position: relative;
    transition: all 0.3s;
    flex-shrink: 0;
}

.radio-circle::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 12px;
    height: 12px;
    background: #f97316;
    border-radius: 50%;
    opacity: 0;
    transition: opacity 0.2s;
}

.radio-label:has(input[type="radio"]:checked) {
    border-color: #f97316;
    background: linear-gradient(135deg, #fff7ed 0%, #ffedd5 100%);
}

.radio-label input[type="radio"]:checked + .radio-circle {
    border-color: #f97316;
    background: #fff7ed;
}

.radio-label input[type="radio"]:checked + .radio-circle::after {
    opacity: 1;
}

.radio-label input[type="radio"]:checked ~ .radio-text {
    color: #ea580c;
    font-weight: 600;
}

/* Checkbox样式 */
.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    cursor: pointer;
    font-size: 15px;
    color: #333;
    line-height: 1.5;
}

.checkbox-label input[type="checkbox"] {
    display: none;
}

.checkbox-box {
    width: 22px;
    height: 22px;
    min-width: 22px;
    border: 2px solid #d1d5db;
    border-radius: 4px;
    position: relative;
    transition: all 0.2s;
    margin-top: 2px;
}

.checkbox-box::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #fff;
    font-size: 14px;
    font-weight: bold;
    opacity: 0;
    transition: opacity 0.2s;
}

.checkbox-label input[type="checkbox"]:checked + .checkbox-box {
    background: #f97316;
    border-color: #f97316;
}

.checkbox-label input[type="checkbox"]:checked + .checkbox-box::after {
    opacity: 1;
}

.checkbox-text {
    flex: 1;
}

/* 示例按钮 */
.example-bar {
    margin-bottom: 24px;
}

.btn-example {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    color: #92400e;
    border: 1px solid #fbbf24;
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-example:hover {
    background: linear-gradient(135deg, #fde68a 0%, #fcd34d 100%);
    transform: translateY(-1px);
}

/* 响应式 */
@media (max-width: 768px) {
    .header-container {
        padding: 12px 16px;
    }
    
    .nav {
        gap: 16px;
    }
    
    .nav-link {
        display: none;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .partners-logos {
        gap: 30px;
    }
    
    .plan-page {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        padding: 20px;
        border-right: none;
        border-bottom: 1px solid #e5e7eb;
    }
    
    .step-list {
        display: flex;
        overflow-x: auto;
        gap: 8px;
    }
    
    .step-item {
        white-space: nowrap;
        margin-bottom: 0;
    }
    
    .content {
        padding: 24px;
    }
    
    .page-title {
        font-size: 28px;
    }
}

/* 消息提示 */
.alert {
    padding: 16px 20px;
    border-radius: 8px;
    margin-bottom: 24px;
    font-size: 14px;
}

.alert-success {
    background: #d1fae5;
    color: #065f46;
    border: 1px solid #6ee7b7;
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fca5a5;
}

.alert-info {
    background: #e0f2fe;
    color: #075985;
    border: 1px solid #7dd3fc;
}

/* ============================================
   首页新模块样式
   ============================================ */

/* 通用标题 */
.section-title {
    text-align: center;
    font-size: 42px;
    font-weight: 800;
    color: #1a1a2e;
    margin-bottom: 56px;
    letter-spacing: -0.5px;
}

.section-title .highlight {
    color: #f97316;
    background: linear-gradient(120deg, #f97316 0%, #ea580c 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 为什么选择我们 */
.why-section {
    padding: 100px 40px;
    background: linear-gradient(180deg, #fffaf7 0%, #fff 100%);
}

.features-grid {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.feature-card {
    background: linear-gradient(145deg, #fff 0%, #fef7f3 100%);
    border-radius: 24px;
    padding: 48px 40px;
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid rgba(249, 115, 22, 0.1);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #f97316, #fb923c);
    opacity: 0;
    transition: opacity 0.3s;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(249, 115, 22, 0.15);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-icon {
    margin-bottom: 28px;
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, #fff7ed 0%, #fed7aa 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon svg {
    width: 40px;
    height: 40px;
}

.feature-card h3 {
    font-size: 22px;
    font-weight: 700;
    color: #1a1a2e;
    margin-bottom: 16px;
    line-height: 1.4;
}

.feature-card p {
    font-size: 16px;
    color: #666;
    line-height: 1.8;
}

/* 三步流程 */
.steps-section {
    padding: 100px 40px;
    background: linear-gradient(180deg, #fffbeb 0%, #fef3c7 50%, #fffbeb 100%);
}

.steps-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 80px;
    align-items: center;
}

.steps-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.step-item {
    display: flex;
    gap: 24px;
    padding: 32px;
    background: rgba(255,255,255,0.9);
    border-radius: 20px;
    transition: all 0.3s;
    border: 1px solid rgba(249, 115, 22, 0.08);
}

.step-item:hover {
    background: #fff;
    box-shadow: 0 16px 48px rgba(249, 115, 22, 0.12);
    transform: translateX(8px);
}

.step-number {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    font-weight: 800;
    color: #fff;
    flex-shrink: 0;
    box-shadow: 0 8px 24px rgba(249, 115, 22, 0.3);
}

.step-content h3 {
    font-size: 20px;
    font-weight: 700;
    color: #1a1a2e;
    margin-bottom: 10px;
}

.step-content p {
    font-size: 15px;
    color: #666;
    line-height: 1.8;
}

/* 右侧可视化 */
.steps-visual {
    position: relative;
    padding: 40px;
    min-height: 500px;
}

.visual-card {
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 12px 40px rgba(0,0,0,0.12);
    overflow: hidden;
    position: absolute;
}

.visual-form {
    width: 320px;
    top: 20px;
    left: 0;
    z-index: 2;
}

.visual-plan {
    width: 300px;
    top: 100px;
    right: 0;
    z-index: 1;
}

.card-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 20px;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    border-bottom: 1px solid #e5e7eb;
    font-size: 14px;
    font-weight: 600;
    color: #374151;
}

.header-icon {
    font-size: 18px;
}

.form-preview, .plan-preview {
    padding: 20px;
}

.form-group label {
    font-size: 13px;
    color: #6b7280;
    display: block;
    margin-bottom: 10px;
    font-weight: 500;
}

.form-field {
    font-size: 12px;
    color: #9ca3af;
    margin-bottom: 6px;
}

.form-value {
    font-size: 14px;
    color: #374151;
    padding: 12px 16px;
    background: #f9fafb;
    border-radius: 8px;
    border: 1px solid #e5e7eb;
}

.plan-section {
    padding: 10px 16px;
    font-size: 13px;
    color: #6b7280;
    border-left: 3px solid transparent;
    margin-bottom: 6px;
    border-radius: 0 8px 8px 0;
}

.plan-section.active {
    background: linear-gradient(90deg, #fff7ed 0%, #ffedd5 100%);
    border-left-color: #f97316;
    color: #ea580c;
    font-weight: 600;
}

.generate-btn-visual {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: #fff;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    box-shadow: 0 8px 32px rgba(16, 185, 129, 0.4);
}

/* 应用场景 */
.use-cases-section {
    padding: 100px 40px;
    background: linear-gradient(180deg, #fff 0%, #fffaf7 100%);
}

.use-cases-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.use-case-card {
    display: flex;
    gap: 24px;
    padding: 40px;
    background: linear-gradient(145deg, #fff 0%, #fef7f3 100%);
    border-radius: 20px;
    transition: all 0.3s;
    border: 1px solid rgba(249, 115, 22, 0.08);
}

.use-case-card:hover {
    background: #fff;
    box-shadow: 0 16px 48px rgba(249, 115, 22, 0.12);
    transform: translateY(-4px);
}

.use-case-icon {
    flex-shrink: 0;
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, #fff7ed 0%, #fed7aa 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.use-case-icon svg {
    width: 32px;
    height: 32px;
}

.use-case-content h3 {
    font-size: 20px;
    font-weight: 700;
    color: #1a1a2e;
    margin-bottom: 12px;
}

.use-case-content p {
    font-size: 15px;
    color: #666;
    line-height: 1.8;
}

/* 响应式 */
@media (max-width: 1100px) {
    .features-grid {
        grid-template-columns: 1fr;
        max-width: 600px;
    }
    
    .steps-container {
        grid-template-columns: 1fr;
    }
    
    .steps-visual {
        display: none;
    }
    
    .use-cases-grid {
        grid-template-columns: 1fr;
        max-width: 600px;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .why-section,
    .steps-section,
    .use-cases-section {
        padding: 60px 24px;
    }
}