/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 背景图预加载优化 - 移除重复定义，合并到主hero样式中 */

:root {
    --primary-color: #2c5282;
    --secondary-color: #4299e1;
    --accent-color: #ed8936;
    --text-dark: #1a202c;
    --text-light: #4a5568;
    --bg-light: #f7fafc;
    --bg-white: #ffffff;
    --border-color: #e2e8f0;
    --success-color: #48bb78;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    --shadow-hover: 0 5px 20px rgba(0, 0, 0, 0.1);
    --gradient-primary: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    --gradient-accent: linear-gradient(135deg, #ed8936, #f6ad55);
}

html {
    min-width: 1200px;
}

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';
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
    overflow-x: auto;
    padding-top: 70px; /* 为固定导航栏留出空间 */
    min-width: 1200px;
}

.container {
    width: 1200px;
    margin: 0 auto;
    /* padding: 0 20px; */
}

/* 顶部栏 */
.top-bar {
    background-color: var(--text-dark);
    color: white;
    padding: 10px 0;
    font-size: 13px;
}

.top-bar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.contact-info {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.contact-info span {
    display: flex;
    align-items: center;
}

.top-actions {
    display: flex;
    gap: 15px;
    align-items: center;
}

.btn-consult {
    background-color: var(--accent-color);
    color: white;
    border: none;
    padding: 6px 15px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 13px;
    transition: all 0.3s;
}

.btn-consult:hover {
    background-color: #e65a2d;
    transform: translateY(-2px);
}

/* 语言选择功能已移除 */



/* 按钮加载状态 */

/* 按钮加载状态 */
.btn.loading {
    pointer-events: none;
    opacity: 0.7;
}

.btn.loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-left: 8px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}


/* 按钮焦点样式 */
.btn:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* 按钮禁用状态 */
.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}


/* 英雄区域 */
.hero {
    /* 优化背景图加载 */
    background-size: cover;
    background-position: center top;
    background-attachment: fixed;
    background-repeat: no-repeat;
    color: white;
    padding: 50px 0 80px;
    position: relative;
    overflow: hidden;
    min-height: 60vh;
    clip-path: polygon(0 0, 100% 0, 100% 90%, 0 100%);
    /* 添加背景图预加载优化 */
    will-change: transform;
    transition: all 0.5s ease-in-out;
}

.hero.loaded {
    background-image: url('../img/bg.jpg');
    background-position: center top;
    background-size: cover;
}

/* 移动端优化 - 确保塔尖在手机上也能显示 */

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: #333;
    opacity: 0.5;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E") repeat;
    opacity: 0.1;
    pointer-events: none;
}

@keyframes wave {
    0% { background-position: 0 0; }
    100% { background-position: 1200px 0; }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin: 40px 0;
    flex-wrap: wrap;
}

.hero-actions .btn {
    min-width: 180px;
    padding: 16px 32px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 50px;
    text-decoration: none;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
    border: 2px solid transparent;
}

.hero-actions .btn-primary {
    background: linear-gradient(135deg, #ff6b6b, #ff8e53);
    color: white;
    border: 2px solid transparent;
    box-shadow: 0 8px 25px rgba(255, 107, 107, 0.4);
    position: relative;
}

.hero-actions .btn-primary::after {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(135deg, #ff6b6b, #ff8e53, #ff6b6b);
    border-radius: 50px;
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s ease;
    filter: blur(8px);
}

.hero-actions .btn-primary:hover::after {
    opacity: 0.6;
}

.hero-actions .btn-primary:hover {
    transform: translateY(-8px) scale(1.05);
    box-shadow: 0 15px 40px rgba(255, 107, 107, 0.7), 0 5px 15px rgba(255, 107, 107, 0.3);
    background: linear-gradient(135deg, #ff5252, #ff7043);
    border-color: rgba(255, 255, 255, 0.3);
}

.hero-actions .btn-primary:hover::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: shimmer 0.8s ease-in-out;
}

@keyframes shimmer {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

.hero-actions .btn-primary:active {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 107, 107, 0.5);
}

.hero-actions .btn-secondary {
    background: rgba(255, 255, 255, 0.15);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(15px);
}

.hero-actions .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-5px);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.2);
}

.hero-actions .btn-secondary:active {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.hero-actions .btn i {
    margin-right: 8px;
    font-size: 18px;
    transition: transform 0.3s ease;
}

.hero-actions .btn:hover i {
    transform: scale(1.1);
}

.hero-actions .btn-primary i {
    animation: rocketPulse 2s infinite;
    transition: transform 0.3s ease;
}

.hero-actions .btn-primary:hover i {
    transform: scale(1.2) rotate(-5deg);
    animation: rocketBoost 0.6s ease-in-out;
}

@keyframes rocketPulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

@keyframes rocketBoost {
    0% {
        transform: scale(1) rotate(0deg);
    }
    50% {
        transform: scale(1.3) rotate(-10deg);
    }
    100% {
        transform: scale(1.2) rotate(-5deg);
    }
}


.hero-title {
    font-size: 46px;
    font-weight: 800;
    margin-bottom: 24px;
    line-height: 1.15;
    color: #ffffff;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3), 0 2px 8px rgba(0, 0, 0, 0.2);
    letter-spacing: -0.5px;
}

.hero-subtitle-main {
    font-size: 28px;
    margin-bottom: 24px;
    color: rgba(255, 255, 255, 0.98);
    font-weight: 600;
    line-height: 1.4;
    text-shadow: 0 3px 15px rgba(0, 0, 0, 0.3);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    letter-spacing: 0.5px;
}

.hero-subtitle {
    font-size: 20px;
    margin-bottom: 48px;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 400;
    line-height: 1.6;
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 80px;
    margin: 40px 0;
    flex-wrap: wrap;
    position: relative;
}


.stat-item {
    text-align: center;
    position: relative;
}

.stat-item::after {
    content: '';
    position: absolute;
    right: -40px;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 40px;
    background: linear-gradient(180deg, 
        rgba(255,255,255,0) 0%,
        rgba(255,255,255,0.3) 50%,
        rgba(255,255,255,0) 100%
    );
}

.stat-item:last-child::after {
    display: none;
}

.stat-number {
    font-size: 48px;
    font-weight: 900;
    margin-bottom: 12px;
    color: #ffffff;
    background: linear-gradient(135deg, #ffffff, #f0f8ff);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -1px;
}

.stat-label {
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 0.8px;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    text-transform: uppercase;
}


.hero-features {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    padding-top: 20px;
}

.feature-item {
    text-align: center;
    padding: 30px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s;
}

.feature-item:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.1);
}

.feature-item i {
    font-size: 32px;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #ffffff, rgba(255,255,255,0.8));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.feature-item h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: #ffffff;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    letter-spacing: -0.2px;
}

.feature-item p {
    font-size: 15px;
    font-weight: 400;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.85);
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
    letter-spacing: 0.2px;
}

.feature-item h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: #ffffff;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    letter-spacing: -0.2px;
}

.feature-item p {
    font-size: 15px;
    font-weight: 400;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.85);
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
    letter-spacing: 0.2px;
}

/* 区块通用样式 */
section {
    padding:30px 0 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.section-subtitle {
    font-size: 20px;
    color: var(--text-light);
    margin-bottom: 10px;
}

.section-desc {
    font-size: 16px;
    color: var(--text-light);
    max-width: 800px;
    margin: 0 auto;
}

/* 服务栏 */
.services {
    background-color: var(--bg-light);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.service-card {
    background-color: white;
    padding: 0;
    border-radius: 20px;
    box-shadow: var(--shadow);
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    text-align: left;
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.service-card.featured {
    background: linear-gradient(135deg, #ffffff 0%, var(--bg-light) 100%);
    border: 2px solid var(--primary-color);
    transform: scale(1.05);
}

.service-card.featured::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

.service-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
    border-radius: 20px 20px 0 0;
    position: relative;
}

.service-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.service-card:hover .service-image img {
    transform: scale(1.05);
}

.service-badge {
    position: absolute;
    top: 20px;
    right: -30px;
    background: var(--gradient-primary);
    color: white;
    padding: 8px 30px;
    transform: rotate(45deg);
    font-size: 14px;
    font-weight: 600;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    z-index: 10;
}

.service-content {
    padding: 15px 40px 40px;
}

.service-icon {
    width: 80px;
    height: 80px;
    margin-bottom: 25px;
    background: linear-gradient(145deg, #ffffff 0%, #f1f5f9 100%);
    border-radius: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: #3b82f6;
    transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 
        0 8px 25px rgba(59, 130, 246, 0.15),
        0 4px 12px rgba(0, 0, 0, 0.05),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
    border: 2px solid rgba(59, 130, 246, 0.1);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.service-icon::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, 
        rgba(255, 255, 255, 0.3) 0%, 
        rgba(255, 255, 255, 0.1) 50%, 
        rgba(255, 255, 255, 0.05) 100%);
    border-radius: 24px;
    opacity: 0;
    transition: all 0.4s ease;
    backdrop-filter: blur(5px);
}

.service-card:hover .service-icon::before {
    opacity: 1;
    background: linear-gradient(135deg, 
        rgba(255, 255, 255, 0.3) 0%, 
        rgba(255, 255, 255, 0.2) 50%, 
        rgba(255, 255, 255, 0.1) 100%);
    animation: gentleShimmer 3s ease-in-out infinite;
}

@keyframes gentleShimmer {
    0%, 100% {
        transform: translateX(-100%) skewX(-10deg);
        opacity: 0;
    }
    50% {
        transform: translateX(100%) skewX(-10deg);
        opacity: 0.6;
    }
}

.service-card:hover .service-icon {
    background: linear-gradient(145deg, #3b82f6 0%, #2563eb 50%, #1d4ed8 100%);
    color: white;
    transform: scale(1.05) translateY(-8px) rotate(3deg);
    box-shadow: 
        0 20px 40px rgba(59, 130, 246, 0.3),
        0 12px 25px rgba(37, 99, 235, 0.2),
        0 6px 15px rgba(29, 78, 216, 0.15),
        0 3px 8px rgba(0, 0, 0, 0.08),
        inset 0 1px 2px rgba(255, 255, 255, 0.2),
        inset 0 -1px 1px rgba(0, 0, 0, 0.05);
    border-color: rgba(255, 255, 255, 0.3);
    animation: iconFloat 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}


@keyframes iconFloat {
    0% {
        transform: scale(1) translateY(0) rotate(0deg);
        box-shadow: 
            0 8px 25px rgba(59, 130, 246, 0.15),
            0 4px 12px rgba(0, 0, 0, 0.05);
    }
    30% {
        transform: scale(1.1) translateY(-10px) rotate(5deg);
        box-shadow: 
            0 25px 45px rgba(59, 130, 246, 0.4),
            0 15px 30px rgba(37, 99, 235, 0.3),
            0 8px 20px rgba(29, 78, 216, 0.2),
            0 4px 12px rgba(0, 0, 0, 0.1);
    }
    60% {
        transform: scale(1.08) translateY(-6px) rotate(2deg);
        box-shadow: 
            0 22px 40px rgba(59, 130, 246, 0.35),
            0 12px 25px rgba(37, 99, 235, 0.25),
            0 6px 15px rgba(29, 78, 216, 0.15),
            0 3px 8px rgba(0, 0, 0, 0.08);
    }
    100% {
        transform: scale(1.05) translateY(-8px) rotate(3deg);
        box-shadow: 
            0 20px 40px rgba(59, 130, 246, 0.3),
            0 12px 25px rgba(37, 99, 235, 0.2),
            0 6px 15px rgba(29, 78, 216, 0.15),
            0 3px 8px rgba(0, 0, 0, 0.08);
    }
}

.service-card h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.service-card p {
    color: var(--text-light);
    margin-bottom: 25px;
    line-height: 1.8;
}

.service-features {
    list-style: none;
    margin-bottom: 25px;
}

.service-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-light);
    margin-bottom: 12px;
    font-size: 15px;
}

.service-features li i {
    color: var(--success-color);
    font-size: 16px;
}




/* 案例展示 */
.tabs {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 12px 25px;
    background-color: white;
    border: 2px solid var(--border-color);
    border-radius: 25px;
    cursor: pointer;
    font-size: 15px;
    transition: all 0.3s;
    color: var(--text-dark);
}

.tab-btn.active,
.tab-btn:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(44, 82, 130, 0.3);
}

.tab-btn {
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    position: relative;
    overflow: hidden;
}

.tab-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.6s;
}

.tab-btn:hover::before {
    left: 100%;
}

/* 案例卡片切换动画 */
.case-card.fade-in {
    animation: fadeInUp 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

.case-card.fade-out {
    animation: fadeOutDown 0.4s cubic-bezier(0.55, 0.06, 0.68, 0.19) forwards;
}

@keyframes fadeInUp {
    0% {
        opacity: 0;
        transform: translateY(20px) scale(0.95);
    }
    50% {
        opacity: 0.7;
        transform: translateY(10px) scale(0.98);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes fadeOutDown {
    0% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
    50% {
        opacity: 0.5;
        transform: translateY(10px) scale(0.98);
    }
    100% {
        opacity: 0;
        transform: translateY(20px) scale(0.95);
    }
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    min-height: 400px; /* 设置最小高度避免布局抖动 */
    position: relative;
}

.case-card {
    background-color: white;
    padding: 0;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    overflow: hidden;
    opacity: 1;
    transform: translateY(0) scale(1);
    will-change: opacity, transform; /* 优化GPU加速 */
}

.case-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.case-image {
    width: 100%;
    height: 180px;
    overflow: hidden;
}

.case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.case-card:hover .case-image img {
    transform: scale(1.05);
}

.case-content {
    padding: 25px 30px 30px;
}

.case-journal h4 {
    font-size: 20px;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.impact-factor {
    color: var(--accent-color);
    font-weight: 600;
    font-size: 16px;
    margin-bottom: 15px;
}

.case-keywords {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.keyword {
    background-color: var(--bg-light);
    color: var(--text-dark);
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 13px;
}

.case-review {
    font-style: italic;
    color: var(--text-light);
    border-left: 4px solid var(--primary-color);
    padding-left: 15px;
    margin: 20px 0;
    line-height: 1.8;
}

.case-details {
    font-size: 14px;
    color: var(--text-light);
}

.case-details p {
    margin-bottom: 8px;
}

/* 专家团队 */
.experts {
    background-color: var(--bg-light);
}


.experts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.expert-card {
    background-color: white;
    padding: 40px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: all 0.3s;
}

.expert-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.expert-avatar {
    margin-bottom: 20px;
    width: 100px;
    height: 100px;
    margin: 0 auto 20px;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid var(--primary-color);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.expert-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.expert-card h3 {
    font-size: 24px;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.expert-location {
    color: var(--text-light);
    margin-bottom: 10px;
}

.expert-title {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 15px;
}

.expert-field,
.expert-position {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 10px;
    text-align: left;
    line-height: 1.8;
}

.expert-stats {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 25px;
    padding-top: 25px;
    border-top: 2px solid var(--bg-light);
}

.expert-stat {
    text-align: center;
}

.expert-stat .stat-number {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-color);
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.3);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.expert-stat .stat-label {
    font-size: 13px;
    color: var(--text-light);
    font-weight: 500;
    text-shadow: 0.5px 0.5px 2px rgba(0, 0, 0, 0.2);
}

/* 服务保障 */
.guarantees-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.guarantee-card {
    background-color: white;
    padding: 35px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: all 0.3s;
}

.guarantee-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.guarantee-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--accent-color), #ff8c5a);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: white;
}

.guarantee-card h3 {
    font-size: 18px;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.guarantee-card p {
    color: var(--text-light);
    line-height: 1.8;
    font-size: 14px;
}

/* 用户评价 */
.reviews {
    background-color: var(--bg-light);
    padding: 100px 0;
}

/* 所有评价网格布局 - 三列显示 */
.all-reviews-grid {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 30px;
    align-items: flex-start;
    max-width: 1400px;
    margin: 0 auto;
}

/* （撤回）去除针对用户评价卡片的额外布局规则 */

.review-card {
    background: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
    padding: 35px 30px;
    border-radius: 16px;
    box-shadow: 
        0 8px 32px rgba(0, 0, 0, 0.08),
        0 4px 16px rgba(0, 0, 0, 0.04),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    height: 560px;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    display: flex;
    flex-direction: column;
    flex: 0 0 calc(33.333% - 20px);
    width: calc(33.333% - 20px);
    min-width: 0;
}

.review-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

.review-card::after {
    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, 0.05) 50%, 
        rgba(255, 255, 255, 0.02) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
    border-radius: 10px;
    pointer-events: none;
    z-index: 0;
}

.review-card:hover {
    transform: translateY(-12px) scale(1.02);
    box-shadow: 
        0 20px 60px rgba(0, 0, 0, 0.12),
        0 10px 30px rgba(0, 0, 0, 0.08),
        0 5px 15px rgba(0, 0, 0, 0.04),
        inset 0 1px 0 rgba(255, 255, 255, 0.9);
    border-color: rgba(59, 130, 246, 0.2);
}

.review-card:hover::after {
    opacity: 1;
}

.review-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 15px;
    padding-bottom: 15px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    position: relative;
}

.review-header::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 40px;
    height: 2px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 1px;
}

.review-rating {
    color: #ffa500;
    font-size: 20px;
    display: flex;
    gap: 3px;
    filter: drop-shadow(0 2px 4px rgba(255, 165, 0, 0.3));
}

.review-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
}

.review-date {
    font-size: 13px;
    color: var(--text-light);
    background: linear-gradient(135deg, #f1f5f9, #e2e8f0);
    padding: 6px 12px;
    border-radius: 15px;
    font-weight: 500;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.review-service {
    font-size: 16px;
    color: var(--primary-color);
    padding: 0 12px 30px 12px;
    border-radius: 15px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.review-text {
    color: var(--text-dark);
    line-height: 1.9;
    font-style: italic;
    font-size: 17px;
    position: relative;
    padding-left: 25px;
    font-weight: 400;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.review-text::before {
    content: '"';
    position: absolute;
    left: 0;
    top: -15px;
    font-size: 60px;
    color: var(--primary-color);
    opacity: 0.2;
    font-family: serif;
    line-height: 1;
}
.review-text::after {
    content: '"';
    position: absolute;
    right: 0;
    bottom: -15px;
    font-size: 60px;
    color: var(--primary-color);
    opacity: 0.2;
}

/* 学校名称模块 */
.review-institution {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 10px 0;
    justify-content: flex-end;
    transition: all 0.3s ease;
}

.review-institution i {
    color: var(--primary-color);
    font-size: 16px;
    opacity: 0.8;
}

.review-institution span {
    color: var(--text-dark);
    font-weight: 600;
    font-size: 15px;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

/* 评论截图模块 */
.review-screenshot {
    position: relative;
    margin-top: 20px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
    height: 250px;
}

/* 对齐第一行三个评价的截图遮罩高度与底部位置 */
.all-reviews-grid .review-card:nth-child(-n+3) .review-screenshot {
    margin-top: auto;
}

/* 强制第一个评价截图贴底，确保与第二、第三对齐 */
.all-reviews-grid .review-card:nth-child(1) .review-screenshot {
    margin-top: auto !important;
}

.review-screenshot:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.screenshot-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.review-screenshot:hover .screenshot-image {
    transform: scale(1.05);
}

.screenshot-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.review-screenshot:hover .screenshot-overlay {
    opacity: 1;
}

.screenshot-overlay i {
    color: white;
    font-size: 24px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}


.reviews-navigation {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 30px;
}

.nav-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: 2px solid var(--primary-color);
    background-color: white;
    color: var(--primary-color);
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
}

.nav-btn:hover {
    background-color: var(--primary-color);
    color: white;
    transform: scale(1.1);
}

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

.review-dots {
    display: flex;
    gap: 12px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--border-color);
    cursor: pointer;
    transition: all 0.3s;
}

.dot.active {
    background-color: var(--primary-color);
    transform: scale(1.2);
}

.dot:hover {
    background-color: var(--secondary-color);
    transform: scale(1.1);
}


/* 合作伙伴 */
.partners {
    padding: 80px 0;
    overflow: hidden;
}

.partners .section-header {
    text-align: center;
    margin-bottom: 60px;
}

.partners .section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.partners .section-subtitle {
    font-size: 1.2rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

.partners-marquee {
    position: relative;
    width: 100%;
    height: 120px;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 16px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

.marquee-content {
    display: flex;
    align-items: center;
    height: 100%;
    animation: marquee 30s linear infinite;
    gap: 40px;
    padding: 0 20px;
}

.partner-logo {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 80px;
    padding: 15px 25px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.partner-logo:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.partner-logo img {
    max-height: 50px;
    max-width: 120px;
    width: auto;
    height: auto;
    object-fit: contain;
    opacity: 0.8;
    transition: all 0.3s ease;
}

.partner-logo:hover img {
    opacity: 1;
    transform: scale(1.05);
}

@keyframes marquee {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-100%);
    }
}

/* 暂停动画（鼠标悬停时） */
.partners-marquee:hover .marquee-content {
    animation-play-state: paused;
}




/* 移除响应式设计 - 页面不需要手机端适配 */

/* 动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes highlightFade {
    0% {
        opacity: 0;
    }
    20% {
        opacity: 1;
    }
    100% {
        opacity: 0;
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.case-card {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.service-card,
.expert-card,
.guarantee-card {
    opacity: 1;
    transform: translateY(0);
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.review-card {
    opacity: 1;
    transform: translateY(0);
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.animate-in {
    opacity: 1;
    transform: translateY(0);
}

.service-card:nth-child(odd).animate-in {
    animation: slideInLeft 0.6s ease-out forwards;
}

.service-card:nth-child(even).animate-in {
    animation: slideInRight 0.6s ease-out forwards;
}

.expert-card.animate-in {
    animation: scaleIn 0.6s ease-out forwards;
}

/* 添加交互动画 */
.service-card,
.case-card,
.expert-card,
.guarantee-card {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.service-card:hover,
.case-card:hover,
.expert-card:hover,
.guarantee-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}

/* 添加渐变边框效果 */
.service-card::after,
.case-card::after,
.expert-card::after,
.guarantee-card::after {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: var(--gradient-primary);
    border-radius: 17px;
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s;
}

.service-card:hover::after,
.case-card:hover::after,
.expert-card:hover::after,
.guarantee-card:hover::after {
    opacity: 0.1;
}



/* 成功案例33样式 */
.cases-33 {
    padding: 80px 0;
}

.cases-33 .section-header {
    text-align: center;
    margin-bottom: 60px;
}

.cases-33 .section-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 20px;
}

.cases-33 .section-subtitle {
    font-size: 20px;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

.cases-33 .cases-carousel-container {
    position: relative;
    margin: 40px 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
}

.cases-33 .carousel-wrapper {
    position: relative;
    width: 100%;
    max-width: 1200px;
}

.cases-33 .cases-carousel {
    width: 100%;
    overflow: hidden;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    position: relative;
}

.cases-33 .carousel-track {
    display: flex;
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    will-change: transform;
}

/* 案例卡片链接样式 */
.cases-33 .case-slide-link {
    text-decoration: none;
    color: inherit;
    display: block;
    min-width: 50%; /* 每个案例占50%宽度 */
    width: 50%;
    flex-shrink: 0; /* 防止收缩 */
}

.cases-33 .case-slide-link:nth-child(odd) {
    margin-right: 20px;
}

.cases-33 .case-slide {
    min-width: 100%;
    width: 100%;
    height: 350px;
    background-color: white;
    display: flex;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
}

.cases-33 .case-slide-link:hover .case-slide {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

.cases-33 .case-image {
    flex: 0 0 45%;
    position: relative;
    overflow: hidden;
    height: 100%;
    background-color: #f5f5f5;
}

.cases-33 .case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: left center;
    transition: transform 0.3s ease;
    display: block;
}

.cases-33 .case-slide:hover .case-image img {
    transform: scale(1.05);
}

.cases-33 .case-content {
    flex: 1;
    padding: 28px;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    min-height: 100%;
}

.cases-33 .case-journal {
    margin-bottom: 15px;
}

.cases-33 .case-journal h4 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 8px;
    line-height: 1.3;
}

.cases-33 .impact-factor {
    color: var(--accent-color);
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 0;
}

.cases-33 .case-details {
    margin-top: 20px;
    flex: 0 0 auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.cases-33 .case-details p {
    margin-bottom: 0;
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.6;
    word-wrap: break-word;
}

.cases-33 .case-details strong {
    color: var(--text-dark);
    font-weight: 600;
}


.cases-33 .carousel-indicators {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 45px;
}

.cases-33 .carousel-indicators .indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: #cbd5e0;
    cursor: pointer;
    transition: all 0.3s ease;
}

.cases-33 .carousel-indicators .indicator.active {
    background-color: var(--primary-color);
    transform: scale(1.2);
}




/* 打印样式 */
@media print {
    .top-bar,
    .navbar,
    .floating-buttons {
        display: none;
    }
}

/* 图片放大查看模态框 */
.image-modal {
    display: none;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(5px);
    animation: fadeIn 0.3s ease;
}

.image-modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    position: relative;
    max-width: 90%;
    max-height: 90%;
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: scaleIn 0.3s ease;
}

.modal-content img {
    width: 100%;
    height: auto;
    display: block;
    max-height: 80vh;
    object-fit: contain;
}

.modal-close {
    position: absolute;
    top: 15px;
    right: 20px;
    color: #fff;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    z-index: 10000;
    background: rgba(0, 0, 0, 0.5);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.modal-close:hover {
    background: rgba(0, 0, 0, 0.8);
    transform: scale(1.1);
}

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

@keyframes scaleIn {
    from { 
        opacity: 0;
        transform: scale(0.8);
    }
    to { 
        opacity: 1;
        transform: scale(1);
    }
}