/* ==================== 扩展变量系统 ==================== */
:root {
    /* 新增设计变量 */
    --deepseek-radius-lg: 24px;
    --deepseek-shadow-hover: 0 20px 60px rgba(16, 163, 127, 0.15);
    --deepseek-secondary: #667eea;
    --deepseek-warning: #FF9800;
    --deepseek-success: #10a37f;
    --deepseek-info: #2196F3;
    --deepseek-danger: #ef4444;

    /* 曲线切割变量 */
    --deepseek-curve-sm: 12px 24px 12px 24px;
    --deepseek-curve-lg: 24px 48px 24px 48px;

    /* 动效变量 */
    --deepseek-transition: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --deepseek-transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* 减少动效支持 */
@media (prefers-reduced-motion: reduce) {
    :root {
        --deepseek-transition: 50ms ease;
        --deepseek-transition-slow: 100ms ease;
    }
}

/* ==================== 基础容器 ==================== */
.start-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 32px;
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
}

/* ==================== 非对称头部区域 ==================== */
.start-header {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 48px;
    align-items: center;
    padding: 64px 48px;
    background: var(--deepseek-sidebar);
    border-radius: var(--deepseek-radius-lg);
    border: 1px solid var(--deepseek-border);
    position: relative;
    overflow: hidden;

}

/* 体块叠合背景 */
.header-bg {
    position: absolute;
    top: -10%;
    right: -20%;
    width: 60%;
    height: 130%;
    background: linear-gradient(135deg,
            rgba(16, 163, 127, 0.05) 0%,
            rgba(102, 126, 234, 0.05) 100%);
    border-radius: 40% 60% 60% 40% / 50% 50% 50% 50%;
    z-index: 1;
    animation: float 20s ease-in-out infinite;
}

@keyframes float {

    0%,
    100% {
        transform: translate(0, 0) rotate(0deg);
    }

    33% {
        transform: translate(10px, -10px) rotate(2deg);
    }

    66% {
        transform: translate(-5px, 5px) rotate(-1deg);
    }
}

.header-content {
    position: relative;
    z-index: 2;
    grid-column: 1;
}

/* 超大标题系统 */
h1 {
    font-size: 72px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    color: var(--deepseek-text);
    letter-spacing: -1.5px;
    /* 变量字体轴模拟 */
    font-variation-settings: "wght" 800, "wdth" 100;
}

h1 .gradient-text {
    background: linear-gradient(135deg,
            var(--deepseek-primary) 0%,
            var(--deepseek-secondary) 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: block;
}

.subtitle {
    font-size: 20px;
    color: var(--deepseek-text-secondary);
    line-height: 1.7;
    margin-bottom: 48px;
    max-width: 600px;
    font-weight: 400;
    opacity: 0.9;
}

/* 非对称按钮组 */
.header-actions {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    margin-top: 32px;
}

/* 曲线切割按钮 */
.start-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 20px 48px;
    background: var(--deepseek-primary);
    color: white;
    border: none;
    border-radius: var(--deepseek-curve-sm);
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: all var(--deepseek-transition);
    position: relative;
    overflow: hidden;
    /* 体块叠合阴影 */
    box-shadow:
        0 4px 12px rgba(16, 163, 127, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.start-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg,
            rgba(255, 255, 255, 0.1) 0%,
            rgba(255, 255, 255, 0) 100%);
    opacity: 0;
    transition: opacity var(--deepseek-transition);
}

.start-btn:hover {
    transform: translateY(-4px);
    background: var(--deepseek-primary-hover);
    box-shadow:
        0 12px 32px rgba(16, 163, 127, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.start-btn:hover::before {
    opacity: 1;
}

.start-btn:active {
    transform: translateY(-2px);
    transition-duration: 100ms;
}

.secondary-btn {
    background: var(--deepseek-secondary);
    box-shadow:
        0 4px 12px rgba(102, 126, 234, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.secondary-btn:hover {
    background: #5a6fd8;
    box-shadow:
        0 12px 32px rgba(102, 126, 234, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

/* 右侧装饰区域 */
.header-decor {
    grid-column: 2;
    position: relative;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.test-icon {
    font-size: 120px;
    color: var(--deepseek-primary);
    opacity: 0.8;
    filter: drop-shadow(0 8px 16px rgba(16, 163, 127, 0.2));
    animation: gentle-pulse 4s ease-in-out infinite;
}

@keyframes gentle-pulse {

    0%,
    100% {
        transform: scale(1);
        opacity: 0.8;
    }

    50% {
        transform: scale(1.05);
        opacity: 1;
    }
}

/* ==================== 非对称功能特色网格 ==================== */
.features-section {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 40px;
    /* 破格效果：第二列更宽 */
    grid-template-rows: auto auto;
}

.feature-card {
    background: var(--deepseek-sidebar);
    border-radius: var(--deepseek-radius);
    padding: 48px 32px;
    border: 1px solid var(--deepseek-border);
    transition: all var(--deepseek-transition);
    position: relative;
    overflow: hidden;
    /* 细微纹理 */
    background-image:
        radial-gradient(circle at 10% 20%, rgba(16, 163, 127, 0.03) 0%, transparent 20%),
        radial-gradient(circle at 90% 80%, rgba(102, 126, 234, 0.03) 0%, transparent 20%);
}

/* 非对称布局：中间卡片破格 */
.feature-card:nth-child(2) {
    grid-row: span 2;
    padding: 64px 40px;
    transform: translateY(-16px);
    border-color: var(--deepseek-primary);
    box-shadow: var(--deepseek-shadow-hover);
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: var(--deepseek-primary);
    box-shadow: var(--deepseek-shadow-hover);
}

.feature-card:nth-child(2):hover {
    transform: translateY(-24px);
}

/* 曲线切割装饰线 */
.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg,
            var(--deepseek-primary),
            var(--deepseek-secondary));
    opacity: 0;
    transition: opacity var(--deepseek-transition);
    border-radius: 2px 2px 0 0;
}

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

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg,
            var(--deepseek-primary) 0%,
            var(--deepseek-primary-hover) 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 32px;
    color: white;
    font-size: 36px;
    box-shadow: 0 8px 24px rgba(16, 163, 127, 0.25);
    transition: all var(--deepseek-transition);
}

.feature-card:hover .feature-icon {
    transform: rotate(5deg) scale(1.1);
    box-shadow: 0 12px 32px rgba(16, 163, 127, 0.35);
}

.feature-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--deepseek-text);
    margin-bottom: 20px;
    line-height: 1.3;
}

.feature-desc {
    color: var(--deepseek-text-secondary);
    line-height: 1.7;
    font-size: 16px;
    opacity: 0.9;
}

/* ==================== 评估流程（网格秩序 + 破格） ==================== */
.process-section {
    background: var(--deepseek-sidebar);
    border-radius: var(--deepseek-radius-lg);
    padding: 40px 64px;
    margin-bottom: 32px;
    border: 1px solid var(--deepseek-border);
    position: relative;
    overflow: hidden;
}

.section-title {
    font-size: 48px;
    font-weight: 800;
    color: var(--deepseek-text);
    margin-bottom: 64px;
    text-align: center;
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -16px;
    left: 10%;
    width: 80%;
    height: 6px;
    background: linear-gradient(90deg,
            transparent,
            var(--deepseek-primary),
            transparent);
    border-radius: 3px;
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    position: relative;
}

/* 连接线（网格秩序的体现） */
.process-steps::before {
    content: '';
    position: absolute;
    top: 40px;
    left: 12.5%;
    width: 75%;
    height: 2px;
    background: linear-gradient(90deg,
            var(--deepseek-primary) 0%,
            var(--deepseek-secondary) 100%);
    opacity: 0.2;
    z-index: 1;
}

.process-step {
    text-align: center;
    z-index: 2;
    position: relative;
    padding: 24px;
    border-radius: var(--deepseek-radius);
    transition: all var(--deepseek-transition);
}

/* 破格效果：交替偏移 */
.process-step:nth-child(odd) {
    transform: translateY(-16px);
}

.process-step:nth-child(even) {
    transform: translateY(16px);
}

.process-step:hover {
    background: rgba(16, 163, 127, 0.05);
    transform: translateY(-8px) !important;
}

.step-number {
    width: 96px;
    height: 96px;
    background: var(--deepseek-sidebar);
    border: 3px solid var(--deepseek-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 32px;
    font-size: 40px;
    font-weight: 800;
    color: var(--deepseek-primary);
    transition: all var(--deepseek-transition);
    box-shadow: 0 8px 24px rgba(16, 163, 127, 0.15);
    /* 等宽数字 */
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', monospace;
}

.process-step:hover .step-number {
    background: var(--deepseek-primary);
    color: white;
    transform: scale(1.15) rotate(10deg);
    box-shadow: 0 12px 32px rgba(16, 163, 127, 0.3);
}

.step-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--deepseek-text);
    margin-bottom: 16px;
}

.step-desc {
    color: var(--deepseek-text-secondary);
    font-size: 16px;
    line-height: 1.6;
    opacity: 0.9;
}

/* ==================== 常见问题（模块化卡片） ==================== */
.faq-section {
    background: var(--deepseek-sidebar);
    border-radius: var(--deepseek-radius-lg);
    padding: 40px 64px;
    margin-bottom: 40px;
    border: 1px solid var(--deepseek-border);
}

.faq-list {
    max-width: 900px;
    margin: 0 auto;
    display: grid;
    gap: 24px;
}

.faq-item {
    background: var(--deepseek-sidebar);
    border-radius: var(--deepseek-radius);
    padding: 32px;
    border: 1px solid var(--deepseek-border);
    transition: all var(--deepseek-transition);
    position: relative;
    overflow: hidden;
}

.faq-item:hover {
    border-color: var(--deepseek-primary);
    box-shadow: var(--deepseek-shadow);
    transform: translateX(8px);
}

.faq-question {
    font-size: 20px;
    font-weight: 700;
    color: var(--deepseek-text);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: color var(--deepseek-transition);
    line-height: 1.4;
}

.faq-question:hover {
    color: var(--deepseek-primary);
}

.faq-answer {
    color: var(--deepseek-text-secondary);
    line-height: 1.7;
    margin-top: 24px;
    font-size: 16px;
    display: none;
    padding-right: 48px;
    opacity: 0.9;
}

.faq-toggle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(16, 163, 127, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 300;
    color: var(--deepseek-primary);
    transition: all var(--deepseek-transition);
    flex-shrink: 0;
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
    background: var(--deepseek-primary);
    color: white;
}

.faq-item.active .faq-question {
    color: var(--deepseek-primary);
}

/* ==================== 行动按钮区域 ==================== */
.action-section {
    text-align: center;
    padding: 48px 64px;
    background: var(--deepseek-sidebar);
    border-radius: var(--deepseek-radius-lg);
    border: 1px solid var(--deepseek-border);
    position: relative;
    overflow: hidden;
    /* 曲线切割 */

}

.action-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg,
            rgba(16, 163, 127, 0.05) 0%,
            rgba(102, 126, 234, 0.05) 100%);
    z-index: 1;
}

.action-title {
    font-size: 48px;
    font-weight: 800;
    color: var(--deepseek-text);
    margin-bottom: 32px;
    position: relative;
    z-index: 2;
    line-height: 1.2;
}

.action-subtitle {
    font-size: 20px;
    color: var(--deepseek-text-secondary);
    max-width: 700px;
    margin: 0 auto 64px;
    line-height: 1.7;
    position: relative;
    z-index: 2;
    opacity: 0.9;
}

.action-buttons {
    display: flex;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
    position: relative;
    z-index: 2;
}

.action-buttons .start-btn:last-child {
    background: linear-gradient(135deg,
            var(--deepseek-warning) 0%,
            #e68900 100%);
    box-shadow:
        0 4px 12px rgba(255, 152, 0, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.action-buttons .start-btn:last-child:hover {
    background: linear-gradient(135deg,
            #e68900 0%,
            #d17a00 100%);
    box-shadow:
        0 12px 32px rgba(255, 152, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
}



/* ==================== 响应式设计 ==================== */
@media (max-width: 1200px) {
    .start-container {
        padding: 24px;
        gap: 24px;
    }

    .start-header {
        grid-template-columns: 1fr;
        gap: 36px;
        padding: 48px 36px;
    }

    .header-decor {
        order: -1;
        height: 180px;
    }

    .test-icon {
        font-size: 96px;
    }

    h1 {
        font-size: 56px;
    }

    .subtitle {
        font-size: 18px;
        margin-bottom: 36px;
    }

    .features-section {
        grid-template-columns: repeat(2, 1fr);
        gap: 28px;
    }

    .feature-card:nth-child(2) {
        grid-row: auto;
        transform: none;
        padding: 44px 32px;
    }

    .feature-card:nth-child(2):hover {
        transform: translateY(-8px);
    }

    .feature-card {
        padding: 40px 32px;
    }

    .feature-icon {
        width: 72px;
        height: 72px;
        font-size: 32px;
    }

    .feature-title {
        font-size: 22px;
    }

    .process-steps {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }

    .process-steps::before {
        display: none;
    }

    .process-step:nth-child(odd),
    .process-step:nth-child(even) {
        transform: none;
    }

    .process-step:hover {
        transform: translateY(-8px) !important;
    }

    .step-number {
        width: 80px;
        height: 80px;
        font-size: 36px;
    }

    .step-title {
        font-size: 20px;
    }

    .section-title {
        font-size: 40px;
        margin-bottom: 56px;
    }

    .action-title {
        font-size: 40px;
    }

    .action-subtitle {
        font-size: 18px;
    }
}

@media (max-width: 768px) {
    .start-container {
        padding: 20px;
        gap: 20px;
    }

    .start-header {
        padding: 40px 28px;

    }

    h1 {
        font-size: 40px;
    }

    .subtitle {
        font-size: 17px;
        margin-bottom: 32px;
    }

    .section-title {
        font-size: 32px;
        margin-bottom: 48px;
    }

    .action-title {
        font-size: 32px;
        margin-bottom: 24px;
    }

    .action-subtitle {
        font-size: 17px;
        margin-bottom: 48px;
    }

    .features-section,
    .process-steps {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    .feature-card:nth-child(2) {
        padding: 40px 28px;
    }

    .feature-card {
        padding: 36px 28px;
    }

    .feature-icon {
        width: 72px;
        height: 72px;
        font-size: 32px;
        margin-bottom: 28px;
    }

    .feature-title {
        font-size: 22px;
    }

    .feature-desc {
        font-size: 15px;
    }

    .header-actions,
    .action-buttons {
        flex-direction: column;
        align-items: center;
        gap: 20px;
    }

    .start-btn {
        width: 100%;
        max-width: 300px;
        padding: 18px 36px;
        font-size: 16px;
    }

    .process-section,
    .faq-section,
    .action-section {
        padding: 48px 32px;
        margin-bottom: 24px;
    }

    .action-section {
        clip-path: polygon(28px 0,
                100% 0,
                100% 100%,
                0 100%,
                0 28px);
    }

    .step-number {
        width: 72px;
        height: 72px;
        font-size: 32px;
    }

    .step-title {
        font-size: 20px;
    }

    .step-desc {
        font-size: 15px;
    }

    .faq-item {
        padding: 28px;
    }

    .faq-question {
        font-size: 18px;
    }

    .faq-answer {
        font-size: 15px;
        padding-right: 36px;
    }

    .test-icon {
        font-size: 80px;
    }

    .info-footer {
        padding: 20px 20px;
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    .start-container {
        padding: 16px;
        gap: 16px;
    }

    .start-header {
        padding: 32px 20px;

    }

    h1 {
        font-size: 32px;
        letter-spacing: -0.5px;
    }

    .subtitle {
        font-size: 15px;
        margin-bottom: 32px;
    }

    .section-title,
    .action-title {
        font-size: 24px;
        margin-bottom: 40px;
    }

    .header-actions,
    .action-buttons {
        gap: 16px;
    }

    .start-btn {
        padding: 16px 24px;
        font-size: 15px;
        width: 100%;
        max-width: 280px;
        border-radius: 16px;
    }

    .test-icon {
        font-size: 64px;
    }

    .features-section,
    .process-steps {
        gap: 24px;
    }

    .feature-card {
        padding: 32px 24px;
    }

    .feature-icon {
        width: 64px;
        height: 64px;
        font-size: 28px;
        margin-bottom: 24px;
    }

    .feature-title {
        font-size: 20px;
        margin-bottom: 16px;
    }

    .feature-desc {
        font-size: 14px;
    }

    .process-section,
    .faq-section,
    .action-section {
        padding: 40px 24px;
        margin-bottom: 16px;
    }

    .step-number {
        width: 64px;
        height: 64px;
        font-size: 28px;
        margin-bottom: 20px;
    }

    .step-title {
        font-size: 18px;
        margin-bottom: 12px;
    }

    .step-desc {
        font-size: 14px;
    }

    .faq-item {
        padding: 24px;
    }

    .faq-question {
        font-size: 16px;
    }

    .faq-answer {
        font-size: 14px;
        padding-right: 24px;
        margin-top: 16px;
    }

    .faq-toggle {
        width: 32px;
        height: 32px;
        font-size: 20px;
    }

    .action-section {
        clip-path: polygon(24px 0,
                100% 0,
                100% 100%,
                0 100%,
                0 24px);
    }

    .action-subtitle {
        font-size: 16px;
        margin-bottom: 40px;
    }

    .info-footer {
        padding: 16px 16px;
        font-size: 13px;
        margin-top: 16px;
    }
}

@media (max-width: 375px) {
    .start-container {
        padding: 12px;
        gap: 12px;
    }

    .start-header {
        padding: 24px 16px;
    }

    h1 {
        font-size: 28px;
    }

    .subtitle {
        font-size: 14px;
    }

    .section-title,
    .action-title {
        font-size: 22px;
    }

    .start-btn {
        padding: 14px 20px;
        font-size: 14px;
        max-width: 100%;
    }

    .test-icon {
        font-size: 56px;
    }

    .feature-card {
        padding: 24px 20px;
    }

    .feature-icon {
        width: 56px;
        height: 56px;
        font-size: 24px;
    }

    .feature-title {
        font-size: 18px;
    }

    .feature-desc {
        font-size: 13px;
    }

    .step-number {
        width: 56px;
        height: 56px;
        font-size: 24px;
    }

    .step-title {
        font-size: 16px;
    }

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

    .faq-item {
        padding: 20px;
    }

    .faq-question {
        font-size: 15px;
    }

    .faq-answer {
        font-size: 13px;
        padding-right: 20px;
    }

    .action-section {
        padding: 32px 20px;
    }
}

/* ==================== 动效系统 ==================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (prefers-reduced-motion: reduce) {
    @keyframes fadeInUp {
        from {
            opacity: 0;
        }

        to {
            opacity: 1;
        }
    }
}

.feature-card,
.process-step,
.faq-item,
.action-section {
    animation: fadeInUp var(--deepseek-transition-slow) ease forwards;
    animation-fill-mode: both;
}

.feature-card:nth-child(1) {
    animation-delay: 100ms;
}

.feature-card:nth-child(2) {
    animation-delay: 200ms;
}

.feature-card:nth-child(3) {
    animation-delay: 300ms;
}

.process-step:nth-child(1) {
    animation-delay: 100ms;
}

.process-step:nth-child(2) {
    animation-delay: 200ms;
}

.process-step:nth-child(3) {
    animation-delay: 300ms;
}

.process-step:nth-child(4) {
    animation-delay: 400ms;
}

/* ==================== 滚动条样式 ==================== */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.02);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb {
    background: var(--deepseek-primary);
    border-radius: 5px;
    opacity: 0.5;
    transition: opacity var(--deepseek-transition);
}

::-webkit-scrollbar-thumb:hover {
    opacity: 0.8;
}

/* 减少动效时的滚动条 */
@media (prefers-reduced-motion: reduce) {
    ::-webkit-scrollbar-thumb {
        transition: none;
    }
}



/* ==================== SVG图标样式 ==================== */

/* 头部装饰图标 */
.test-icon .child-svg {
    width: 220px;
    /* 加宽以容纳两个小孩 */
    height: 140px;
    opacity: 0.9;
    filter: drop-shadow(0 6px 12px rgba(0, 0, 0, 0.15));
    animation: gentle-pulse 4s ease-in-out infinite;
}



@keyframes gentle-pulse {

    0%,
    100% {
        transform: scale(1);
        opacity: 0.8;
    }

    50% {
        transform: scale(1.05);
        opacity: 1;
    }
}

@keyframes baby-wiggle {

    0%,
    100% {
        transform: rotate(0deg);
    }

    25% {
        transform: rotate(3deg);
    }

    75% {
        transform: rotate(-3deg);
    }
}

.test-icon:hover .child-svg {
    animation: gentle-pulse 4s ease-in-out infinite, kids-swing 3s ease-in-out infinite;
    filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.2));
}

/* 特征卡片图标 */
.feature-icon .feature-svg {
    width: 36px;
    height: 36px;
    fill: white;
    transition: all var(--deepseek-transition);
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

.feature-card:hover .feature-svg {
    transform: scale(1.15) rotate(5deg);
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.3));
}

/* 不同功能卡片的图标颜色 */
.feature-card:nth-child(1) .feature-svg {
    fill: white;
}

.feature-card:nth-child(2) .feature-svg {
    fill: white;
}

.feature-card:nth-child(3) .feature-svg {
    fill: white;
}

/* 图标容器调整（移除emoji样式） */
.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg,
            var(--deepseek-primary) 0%,
            var(--deepseek-primary-hover) 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 32px;
    box-shadow: 0 8px 24px rgba(16, 163, 127, 0.25);
    transition: all var(--deepseek-transition);
    position: relative;
    overflow: hidden;
}

/* 图标背景微动效 */
.feature-icon::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg,
            rgba(255, 255, 255, 0.2) 0%,
            transparent 60%,
            rgba(16, 163, 127, 0.1) 100%);
    opacity: 0;
    transition: opacity var(--deepseek-transition);
}

.feature-card:hover .feature-icon::after {
    opacity: 1;
}

/* 不同功能卡片图标背景渐变 */
.feature-card:nth-child(1) .feature-icon {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.25);
}

.feature-card:nth-child(2) .feature-icon {
    background: linear-gradient(135deg, #10a37f 0%, #0d8c6d 100%);
    box-shadow: 0 8px 24px rgba(16, 163, 127, 0.25);
}

.feature-card:nth-child(3) .feature-icon {
    background: linear-gradient(135deg, #FF9800 0%, #F57C00 100%);
    box-shadow: 0 8px 24px rgba(255, 152, 0, 0.25);
}

.feature-card:hover .feature-icon:nth-child(1) {
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
    box-shadow: 0 12px 32px rgba(102, 126, 234, 0.35);
}

.feature-card:hover .feature-icon:nth-child(2) {
    background: linear-gradient(135deg, #0d8c6d 0%, #10a37f 100%);
    box-shadow: 0 12px 32px rgba(16, 163, 127, 0.35);
}

.feature-card:hover .feature-icon:nth-child(3) {
    background: linear-gradient(135deg, #F57C00 0%, #FF9800 100%);
    box-shadow: 0 12px 32px rgba(255, 152, 0, 0.35);
}

/* ==================== 响应式SVG图标 ==================== */
@media (max-width: 1200px) {
    .test-icon .child-svg {
        width: 200px;
        height: 130px;
    }

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

@media (max-width: 768px) {
    .test-icon .child-svg {
        width: 180px;
        height: 110px;
    }

    .feature-icon .feature-svg {
        width: 28px;
        height: 28px;
    }

    .feature-icon {
        width: 72px;
        height: 72px;
        margin-bottom: 28px;
    }
}

@media (max-width: 480px) {
    .test-icon .child-svg {
        width: 150px;
        height: 90px;
    }

    .feature-icon .feature-svg {
        width: 24px;
        height: 24px;
    }

    .feature-icon {
        width: 64px;
        height: 64px;
        margin-bottom: 24px;
    }
}

@media (max-width: 375px) {
    .test-icon .child-svg {
        width: 56px;
        height: 56px;
    }

    .feature-icon .feature-svg {
        width: 20px;
        height: 20px;
    }

    .feature-icon {
        width: 56px;
        height: 56px;
        margin-bottom: 20px;
    }
}

/* ==================== 减少动效支持 ==================== */
@media (prefers-reduced-motion: reduce) {
    .test-icon .child-svg {
        filter: drop-shadow(0 6px 12px rgba(0, 0, 0, 0.3));
    }

    .test-icon:hover .child-svg {
        filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.4));
    }

    .feature-card:hover .feature-icon,
    .feature-card:hover .feature-svg,
    .test-icon:hover .child-svg {
        transform: none !important;
        transition: none;
    }
}

/* ==================== 深色模式支持 ==================== */
@media (prefers-color-scheme: dark) {
    .test-icon .child-svg {
        filter: drop-shadow(0 8px 16px rgba(16, 163, 127, 0.4));
    }

    .feature-icon .feature-svg {
        filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.4));
    }
}

/* ==================== 高对比度模式 ==================== */
@media (prefers-contrast: high) {
    .feature-icon .feature-svg {
        fill: white;
        filter: none;
    }

    .test-icon .child-svg {
        fill: var(--deepseek-primary);
        filter: none;
    }
}