/* =========================================
   网学 myeducs.cn - 商务学术风 V4
   Business-Academic Style
   渐变光效 · 玻璃质感 · 数字指标 · 精致商务
   ========================================= */

/* =========================================
   1. 商务级设计 Token
   ========================================= */
:root {
    /* 品牌主色 - 深邃商务蓝 (替代鲜亮的纯蓝) */
    --biz-primary: #0a2540;
    --biz-primary-light: #1e3a5f;
    --biz-primary-deep: #061a30;

    /* 商务强调色 - 沉稳金 */
    --biz-accent: #d4a574;
    --biz-accent-light: #e8c89a;
    --biz-accent-dark: #b48a5a;

    /* 商务青蓝点缀 */
    --biz-cyan: #4a9eff;
    --biz-cyan-light: #7bb8ff;

    /* 玻璃质感 */
    --glass-bg: rgba(255, 255, 255, 0.08);
    --glass-bg-strong: rgba(255, 255, 255, 0.14);
    --glass-border: rgba(255, 255, 255, 0.18);
    --glass-border-strong: rgba(255, 255, 255, 0.28);

    /* 高级阴影 - 商务感 */
    --shadow-business: 0 10px 30px rgba(10, 37, 64, 0.12), 0 4px 12px rgba(10, 37, 64, 0.06);
    --shadow-business-lg: 0 20px 50px rgba(10, 37, 64, 0.18), 0 8px 20px rgba(10, 37, 64, 0.08);
    --shadow-gold: 0 10px 30px rgba(212, 165, 116, 0.25);
    --shadow-glow: 0 0 40px rgba(74, 158, 255, 0.35);

    /* 渐变背景 */
    --gradient-business: linear-gradient(135deg, #0a2540 0%, #1e3a5f 50%, #2d4a6f 100%);
    --gradient-business-soft: linear-gradient(135deg, #f8fafc 0%, #eef2f7 100%);
    --gradient-gold: linear-gradient(135deg, #d4a574 0%, #b48a5a 100%);
    --gradient-shine: linear-gradient(135deg, transparent 0%, rgba(255,255,255,0.3) 50%, transparent 100%);
}

/* =========================================
   2. 商务级 Hero 区 - 渐变光效
   ========================================= */
.hero-business {
    position: relative;
    padding: 5.5rem 0 5rem;
    background:
        radial-gradient(ellipse 80% 50% at 50% 0%, rgba(74, 158, 255, 0.25) 0%, transparent 60%),
        radial-gradient(ellipse 60% 40% at 80% 80%, rgba(212, 165, 116, 0.15) 0%, transparent 60%),
        linear-gradient(135deg, #0a2540 0%, #1e3a5f 60%, #0a2540 100%);
    overflow: hidden;
    color: #ffffff;
    isolation: isolate;
}

/* 网格底纹 + 噪点叠加 */
.hero-business::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, #000 20%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, #000 20%, transparent 80%);
    pointer-events: none;
    z-index: 0;
}

/* 动态光斑 - 优化版 */
.hero-business .hero-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    pointer-events: none;
    z-index: 0;
    will-change: transform;
}

.hero-business .hero-orb-1 {
    top: -120px;
    right: -100px;
    width: 380px;
    height: 380px;
    background: radial-gradient(circle, rgba(74, 158, 255, 0.45) 0%, transparent 70%);
    animation: orbFloat 20s ease-in-out infinite;
}

.hero-business .hero-orb-2 {
    bottom: -150px;
    left: -120px;
    width: 460px;
    height: 460px;
    background: radial-gradient(circle, rgba(212, 165, 116, 0.3) 0%, transparent 70%);
    animation: orbFloat 24s ease-in-out infinite reverse;
}

.hero-business .hero-orb-3 {
    top: 30%;
    left: 50%;
    width: 280px;
    height: 280px;
    background: radial-gradient(circle, rgba(123, 184, 255, 0.2) 0%, transparent 70%);
    animation: orbFloat 28s ease-in-out infinite 4s;
    transform: translateX(-50%);
}

@keyframes orbFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(30px, -20px) scale(1.1); }
}

.hero-business .container {
    position: relative;
    z-index: 2;
}

.hero-business .hero-content {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

/* 商务徽章 */
.hero-business .hero-badge-glass {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--glass-bg-strong);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    padding: 0.5rem 1.125rem 0.5rem 0.75rem;
    border-radius: 50px;
    margin-bottom: 1.75rem;
    border: 1px solid var(--glass-border-strong);
    box-shadow: 0 8px 24px rgba(0,0,0,0.15);
    animation: badgeFloat 3s ease-in-out infinite;
}

@keyframes badgeFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-3px); }
}

.hero-business .hero-badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #4ade80;
    box-shadow: 0 0 12px #4ade80;
    animation: dotPulse 1.5s ease-in-out infinite;
}

@keyframes dotPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero-business .hero-badge-text {
    font-size: 0.875rem;
    font-weight: 500;
    color: rgba(255,255,255,0.95);
    letter-spacing: 0.02em;
}

.hero-business .hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 1.5rem;
    color: #ffffff;
    letter-spacing: -0.025em;
    text-shadow: 0 2px 20px rgba(0,0,0,0.2);
}

.hero-business .hero-title-sub {
    display: block;
    font-size: 1.5rem;
    font-weight: 400;
    opacity: 0.85;
    margin-bottom: 0.75rem;
    letter-spacing: 0.01em;
}

.hero-business .hero-title-main {
    display: block;
    background: linear-gradient(135deg, #ffffff 0%, #e8c89a 50%, #d4a574 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 3.75rem;
    font-weight: 800;
    text-shadow: none;
    letter-spacing: -0.03em;
}

.hero-business .hero-subtitle {
    font-size: 1.125rem;
    color: rgba(255,255,255,0.88);
    margin-bottom: 2.5rem;
    line-height: 1.7;
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
}

.hero-business .hero-subtitle strong {
    color: #e8c89a;
    font-weight: 600;
}

/* =========================================
   3. 大数字指标区 - 商务核心
   ========================================= */
.metrics-section {
    margin-top: 3.5rem;
    padding: 1.5rem;
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    box-shadow: var(--shadow-business);
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    position: relative;
}

.metric-item {
    text-align: center;
    padding: 0.5rem 1rem;
    position: relative;
}

.metric-item:not(:last-child)::after {
    content: '';
    position: absolute;
    right: 0;
    top: 20%;
    bottom: 20%;
    width: 1px;
    background: linear-gradient(180deg, transparent, rgba(255,255,255,0.25), transparent);
}

.metric-value {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #ffffff 0%, #e8c89a 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-feature-settings: 'tnum';
    letter-spacing: -0.02em;
}

.metric-value .metric-unit {
    font-size: 1.125rem;
    margin-left: 0.125rem;
    opacity: 0.9;
}

.metric-label {
    font-size: 0.875rem;
    color: rgba(255,255,255,0.75);
    font-weight: 500;
    letter-spacing: 0.02em;
}

.metric-trend {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    margin-top: 0.5rem;
    padding: 0.125rem 0.5rem;
    background: rgba(74, 222, 128, 0.15);
    color: #86efac;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
}

/* =========================================
   4. 玻璃质感服务卡片
   ========================================= */
.glass-card {
    position: relative;
    display: block;
    background: #ffffff;
    border-radius: 16px;
    padding: 1.75rem 1.5rem;
    text-decoration: none;
    color: inherit;
    overflow: hidden;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1),
                box-shadow 0.4s cubic-bezier(0.16, 1, 0.3, 1),
                border-color 0.4s ease;
    border: 1px solid rgba(10, 37, 64, 0.06);
    box-shadow: 0 4px 12px rgba(10, 37, 64, 0.04);
    height: 100%;
    cursor: pointer;
}

/* 顶部光带 */
.glass-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, #4a9eff 0%, #d4a574 100%);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.glass-card::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 50%;
    height: 200%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.6), transparent);
    transform: skewX(-25deg) translateX(-150%);
    transition: transform 0.8s ease;
    pointer-events: none;
}

.glass-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-business-lg);
    border-color: rgba(74, 158, 255, 0.2);
    color: inherit;
}

.glass-card:hover::before {
    transform: scaleX(1);
}

.glass-card:hover::after {
    transform: skewX(-25deg) translateX(250%);
}

.glass-card .card-icon-box {
    width: 52px;
    height: 52px;
    background: linear-gradient(135deg, #0a2540 0%, #1e3a5f 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #e8c89a;
    box-shadow: 0 8px 16px rgba(10, 37, 64, 0.2);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.glass-card:hover .card-icon-box {
    transform: rotate(-6deg) scale(1.08);
}

.glass-card .card-title {
    font-size: 1.0625rem;
    font-weight: 700;
    color: #0a2540;
    margin-bottom: 0.5rem;
    letter-spacing: -0.01em;
}

.glass-card .card-desc {
    font-size: 0.875rem;
    color: #64748b;
    line-height: 1.6;
}

.glass-card .card-meta {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.875rem;
    padding-top: 0.875rem;
    border-top: 1px dashed rgba(10, 37, 64, 0.08);
    font-size: 0.75rem;
    color: #94a3b8;
}

.glass-card .card-arrow {
    margin-left: auto;
    color: #4a9eff;
    font-size: 1rem;
    transition: transform 0.3s ease;
}

.glass-card:hover .card-arrow {
    transform: translateX(4px);
}

/* AI 标识小角标 */
.glass-card .ai-tag {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    background: linear-gradient(135deg, #4a9eff 0%, #2563eb 100%);
    color: #ffffff;
    font-size: 0.625rem;
    font-weight: 700;
    padding: 0.125rem 0.5rem;
    border-radius: 50px;
    letter-spacing: 0.05em;
    box-shadow: 0 4px 8px rgba(74, 158, 255, 0.3);
}

/* =========================================
   5. 商务级按钮
   ========================================= */
.btn-business {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.625rem;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 50px;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    text-decoration: none;
    letter-spacing: 0.01em;
    position: relative;
    overflow: hidden;
    cursor: pointer;
    border: none;
}

.btn-business-primary {
    background: linear-gradient(135deg, #d4a574 0%, #b48a5a 100%);
    color: #0a2540;
    box-shadow: var(--shadow-gold);
}

.btn-business-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    transition: left 0.6s ease;
}

.btn-business-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(212, 165, 116, 0.4);
    color: #0a2540;
}

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

.btn-business-secondary {
    background: var(--glass-bg-strong);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    color: #ffffff;
    border: 1.5px solid var(--glass-border-strong);
}

.btn-business-secondary:hover {
    background: rgba(255,255,255,0.22);
    border-color: rgba(255,255,255,0.4);
    transform: translateY(-3px);
    color: #ffffff;
}

.btn-business-ghost {
    background: transparent;
    color: #4a9eff;
    border: 1.5px solid #4a9eff;
}

.btn-business-ghost:hover {
    background: #4a9eff;
    color: #ffffff;
    transform: translateY(-3px);
    box-shadow: 0 12px 28px rgba(74, 158, 255, 0.3);
}

/* =========================================
   6. 商务级区块标题
   ========================================= */
.biz-section-header {
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
}

.biz-section-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 1rem;
    background: linear-gradient(135deg, rgba(74, 158, 255, 0.1) 0%, rgba(212, 165, 116, 0.1) 100%);
    border: 1px solid rgba(74, 158, 255, 0.2);
    border-radius: 50px;
    color: #4a9eff;
    font-size: 0.8125rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}

.biz-section-title {
    font-size: 2.25rem;
    font-weight: 800;
    color: #0a2540;
    margin-bottom: 0.875rem;
    letter-spacing: -0.025em;
    line-height: 1.2;
}

.biz-section-title .highlight {
    background: linear-gradient(135deg, #0a2540 0%, #4a9eff 50%, #d4a574 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.biz-section-subtitle {
    font-size: 1.0625rem;
    color: #64748b;
    max-width: 640px;
    margin: 0 auto;
    line-height: 1.6;
}

/* =========================================
   7. 商务级数据指标条 (深色版)
   ========================================= */
.biz-stats-band {
    background: var(--gradient-business);
    padding: 3.5rem 0;
    position: relative;
    overflow: hidden;
}

.biz-stats-band::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 50% 80% at 20% 50%, rgba(74, 158, 255, 0.15) 0%, transparent 60%),
        radial-gradient(ellipse 50% 80% at 80% 50%, rgba(212, 165, 116, 0.12) 0%, transparent 60%);
}

.biz-stats-band .container {
    position: relative;
    z-index: 2;
}

.biz-stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}

.biz-stat-card {
    text-align: center;
    padding: 1.5rem 1rem;
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), background 0.3s ease;
}

.biz-stat-card:hover {
    transform: translateY(-4px);
    background: var(--glass-bg-strong);
}

.biz-stat-number {
    font-size: 2.75rem;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 0.625rem;
    background: linear-gradient(135deg, #ffffff 0%, #e8c89a 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.025em;
    font-feature-settings: 'tnum';
}

.biz-stat-number .stat-unit {
    font-size: 1.125rem;
    margin-left: 0.125rem;
}

.biz-stat-label {
    font-size: 0.9375rem;
    color: rgba(255,255,255,0.85);
    font-weight: 500;
    letter-spacing: 0.02em;
}

.biz-stat-desc {
    margin-top: 0.5rem;
    font-size: 0.75rem;
    color: rgba(255,255,255,0.6);
}

/* =========================================
   8. 商务级特性卡片 (大卡片)
   ========================================= */
.biz-feature-card {
    position: relative;
    display: flex;
    flex-direction: column;
    padding: 2rem 1.75rem;
    background: #ffffff;
    border-radius: 20px;
    border: 1px solid rgba(10, 37, 64, 0.06);
    box-shadow: 0 6px 20px rgba(10, 37, 64, 0.06);
    overflow: hidden;
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    height: 100%;
}

.biz-feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #4a9eff 0%, #d4a574 100%);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.biz-feature-card::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100px;
    background: radial-gradient(circle, rgba(74, 158, 255, 0.05) 0%, transparent 70%);
    border-radius: 50%;
    transform: translate(30%, -30%);
    transition: transform 0.6s ease;
}

.biz-feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-business-lg);
    border-color: rgba(74, 158, 255, 0.18);
}

.biz-feature-card:hover::before {
    transform: scaleX(1);
}

.biz-feature-card:hover::after {
    transform: translate(0, 0) scale(2);
}

.biz-feature-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, #0a2540 0%, #1e3a5f 100%);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.625rem;
    margin-bottom: 1.25rem;
    color: #e8c89a;
    box-shadow: 0 10px 20px rgba(10, 37, 64, 0.2);
    position: relative;
    z-index: 1;
}

.biz-feature-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: #0a2540;
    margin-bottom: 0.625rem;
    letter-spacing: -0.01em;
    position: relative;
    z-index: 1;
}

.biz-feature-desc {
    font-size: 0.9375rem;
    color: #64748b;
    line-height: 1.65;
    flex-grow: 1;
    position: relative;
    z-index: 1;
}

.biz-feature-link {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    margin-top: 1.25rem;
    color: #4a9eff;
    font-weight: 600;
    font-size: 0.875rem;
    text-decoration: none;
    transition: gap 0.3s ease;
    position: relative;
    z-index: 1;
}

.biz-feature-link:hover {
    gap: 0.625rem;
    color: #2563eb;
}

/* =========================================
   9. 商务级流程卡片
   ========================================= */
.biz-flow-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 1rem;
    position: relative;
}

.biz-flow-item {
    text-align: center;
    padding: 1.75rem 1rem 1.5rem;
    background: #ffffff;
    border-radius: 16px;
    border: 1px solid rgba(10, 37, 64, 0.06);
    box-shadow: 0 4px 12px rgba(10, 37, 64, 0.04);
    position: relative;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.biz-flow-item:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-business-lg);
    border-color: rgba(74, 158, 255, 0.18);
}

.biz-flow-num {
    position: absolute;
    top: 0.75rem;
    left: 0.875rem;
    font-size: 0.75rem;
    font-weight: 700;
    color: #d4a574;
    letter-spacing: 0.05em;
}

.biz-flow-icon {
    width: 56px;
    height: 56px;
    margin: 0.5rem auto 1rem;
    background: linear-gradient(135deg, rgba(74, 158, 255, 0.08) 0%, rgba(212, 165, 116, 0.08) 100%);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.biz-flow-item:hover .biz-flow-icon {
    transform: scale(1.1) rotate(-5deg);
    background: linear-gradient(135deg, rgba(74, 158, 255, 0.15) 0%, rgba(212, 165, 116, 0.15) 100%);
}

.biz-flow-title {
    font-size: 1rem;
    font-weight: 700;
    color: #0a2540;
    margin-bottom: 0.375rem;
}

.biz-flow-desc {
    font-size: 0.8125rem;
    color: #64748b;
    line-height: 1.5;
}

/* 连接线 */
.biz-flow-item::after {
    content: '';
    position: absolute;
    top: 50%;
    right: -0.5rem;
    width: 1rem;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(212, 165, 116, 0.5), transparent);
    z-index: 1;
}

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

/* =========================================
   10. 商务级 Tab 切换
   ========================================= */
.biz-tabs {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 2.5rem;
    padding: 0.375rem;
    background: #ffffff;
    border-radius: 50px;
    box-shadow: 0 4px 16px rgba(10, 37, 64, 0.08);
    border: 1px solid rgba(10, 37, 64, 0.06);
    max-width: 540px;
    margin-left: auto;
    margin-right: auto;
}

.biz-tab-btn {
    padding: 0.625rem 1.5rem;
    font-size: 0.9375rem;
    font-weight: 600;
    color: #64748b;
    background: transparent;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    flex: 1;
}

.biz-tab-btn:hover {
    color: #4a9eff;
}

.biz-tab-btn.active {
    background: linear-gradient(135deg, #0a2540 0%, #1e3a5f 100%);
    color: #ffffff;
    box-shadow: 0 6px 14px rgba(10, 37, 64, 0.3);
}

/* =========================================
   11. 商务级 CTA
   ========================================= */
.biz-cta {
    position: relative;
    padding: 4.5rem 0;
    background: var(--gradient-business);
    overflow: hidden;
    isolation: isolate;
}

.biz-cta::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 60% 80% at 20% 50%, rgba(74, 158, 255, 0.2) 0%, transparent 60%),
        radial-gradient(ellipse 60% 80% at 80% 50%, rgba(212, 165, 116, 0.15) 0%, transparent 60%);
    z-index: 0;
}

.biz-cta::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
    background-size: 50px 50px;
    mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, #000 30%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, #000 30%, transparent 80%);
    z-index: 0;
}

.biz-cta .container {
    position: relative;
    z-index: 2;
    text-align: center;
}

.biz-cta-content {
    max-width: 700px;
    margin: 0 auto;
}

.biz-cta-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 1rem;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 50px;
    color: #e8c89a;
    font-size: 0.8125rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
    letter-spacing: 0.05em;
}

.biz-cta-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: #ffffff;
    margin-bottom: 1rem;
    letter-spacing: -0.025em;
    line-height: 1.2;
}

.biz-cta-title .highlight {
    background: linear-gradient(135deg, #ffffff 0%, #e8c89a 50%, #d4a574 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.biz-cta-desc {
    font-size: 1.0625rem;
    color: rgba(255,255,255,0.85);
    margin-bottom: 2rem;
    line-height: 1.7;
}

.biz-cta-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
}

/* =========================================
   12. 商务级页脚
   ========================================= */
.biz-footer {
    background: #061a30;
    color: #ffffff;
    padding: 4rem 0 1.5rem;
    position: relative;
    overflow: hidden;
}

.biz-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(212, 165, 116, 0.5), transparent);
}

.biz-footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 2.5rem;
    margin-bottom: 2.5rem;
}

.biz-footer-brand {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    letter-spacing: 0.02em;
    background: linear-gradient(135deg, #ffffff 0%, #e8c89a 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.biz-footer-desc {
    color: rgba(255,255,255,0.7);
    line-height: 1.75;
    font-size: 0.9375rem;
    margin-bottom: 1.25rem;
}

.biz-footer-stats {
    display: flex;
    gap: 1.5rem;
    padding-top: 1.25rem;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.biz-footer-stat-num {
    font-size: 1.375rem;
    font-weight: 800;
    color: #e8c89a;
    letter-spacing: -0.02em;
}

.biz-footer-stat-label {
    font-size: 0.75rem;
    color: rgba(255,255,255,0.6);
    margin-top: 0.125rem;
}

.biz-footer-title {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    color: #ffffff;
    position: relative;
    padding-bottom: 0.625rem;
}

.biz-footer-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 24px;
    height: 2px;
    background: linear-gradient(90deg, #d4a574, #b48a5a);
    border-radius: 2px;
}

.biz-footer-links {
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
}

.biz-footer-link {
    color: rgba(255,255,255,0.7);
    font-size: 0.9375rem;
    transition: color 0.2s ease, transform 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
}

.biz-footer-link::before {
    content: '→';
    color: #d4a574;
    opacity: 0;
    transform: translateX(-4px);
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.biz-footer-link:hover {
    color: #ffffff;
    transform: translateX(4px);
}

.biz-footer-link:hover::before {
    opacity: 1;
    transform: translateX(0);
}

.biz-footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 1.5rem;
    text-align: center;
    color: rgba(255,255,255,0.5);
    font-size: 0.875rem;
}

.biz-footer-bottom a {
    color: rgba(255,255,255,0.7);
    transition: color 0.2s ease;
}

.biz-footer-bottom a:hover {
    color: #e8c89a;
}

/* =========================================
   13. 商务级专区横幅 (子页面用)
   ========================================= */
.biz-page-banner {
    position: relative;
    padding: 4rem 0 3.5rem;
    background: var(--gradient-business);
    overflow: hidden;
    isolation: isolate;
    color: #ffffff;
}

.biz-page-banner::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 60% 80% at 80% 20%, rgba(74, 158, 255, 0.2) 0%, transparent 60%),
        radial-gradient(ellipse 60% 80% at 20% 80%, rgba(212, 165, 116, 0.15) 0%, transparent 60%);
    z-index: 0;
}

.biz-page-banner::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
    background-size: 50px 50px;
    mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, #000 30%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, #000 30%, transparent 80%);
    z-index: 0;
}

.biz-page-banner .container {
    position: relative;
    z-index: 2;
}

.biz-page-banner-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 1rem;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 50px;
    color: #e8c89a;
    font-size: 0.8125rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
    letter-spacing: 0.05em;
}

.biz-page-banner-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: #ffffff;
    margin-bottom: 1rem;
    letter-spacing: -0.025em;
    line-height: 1.2;
}

.biz-page-banner-title .highlight {
    background: linear-gradient(135deg, #ffffff 0%, #e8c89a 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.biz-page-banner-desc {
    font-size: 1.0625rem;
    color: rgba(255,255,255,0.85);
    line-height: 1.7;
    max-width: 720px;
}

/* 子页面指标条 */
.biz-metrics-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    margin-top: 2.5rem;
}

.biz-metric-card {
    text-align: center;
    padding: 1.25rem 1rem;
    background: var(--glass-bg);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: 14px;
    transition: transform 0.3s ease, background 0.3s ease;
}

.biz-metric-card:hover {
    transform: translateY(-3px);
    background: var(--glass-bg-strong);
}

.biz-metric-card .metric-value {
    font-size: 2rem;
    margin-bottom: 0.375rem;
}

.biz-metric-card .metric-label {
    font-size: 0.8125rem;
}

/* =========================================
   14. 商务级导航栏
   ========================================= */
.biz-navbar {
    background: rgba(10, 37, 64, 0.85);
    backdrop-filter: saturate(180%) blur(16px);
    -webkit-backdrop-filter: saturate(180%) blur(16px);
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.biz-navbar.scrolled {
    background: rgba(10, 37, 64, 0.95);
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.biz-navbar .navbar-logo-icon {
    background: linear-gradient(135deg, #d4a574 0%, #b48a5a 100%);
    box-shadow: 0 4px 12px rgba(212, 165, 116, 0.4);
    color: #0a2540;
}

.biz-navbar .navbar-logo-text {
    color: #ffffff;
}

.biz-navbar .navbar-link {
    color: rgba(255,255,255,0.85);
}

.biz-navbar .navbar-link:hover,
.biz-navbar .navbar-link.active {
    color: #e8c89a;
    background: rgba(212, 165, 116, 0.1);
}

.biz-navbar .navbar-cta {
    background: linear-gradient(135deg, #d4a574 0%, #b48a5a 100%);
    color: #0a2540 !important;
    box-shadow: 0 4px 14px rgba(212, 165, 116, 0.35);
}

.biz-navbar .nav-dropdown-menu {
    background: #ffffff;
    border: 1px solid rgba(10, 37, 64, 0.08);
    box-shadow: 0 20px 40px rgba(10, 37, 64, 0.18);
}

.biz-navbar .navbar-toggle span {
    background: #ffffff;
}

/* =========================================
   15. 商务级浮动按钮
   ========================================= */
.biz-floating {
    background: rgba(10, 37, 64, 0.9);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 16px;
    padding: 0.5rem;
    box-shadow: 0 12px 30px rgba(10, 37, 64, 0.25);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.biz-floating .floating-btn {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    box-shadow: none;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.biz-floating .floating-btn:hover {
    transform: scale(1.08);
}

.biz-floating .floating-btn.primary {
    background: linear-gradient(135deg, #d4a574 0%, #b48a5a 100%);
    color: #0a2540;
    animation: floatPulse 2.5s ease-in-out infinite;
}

/* =========================================
   16. 商务级资讯列表
   ========================================= */
.biz-news-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.biz-news-item {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    padding: 1.25rem 1.5rem;
    background: #ffffff;
    border: 1px solid rgba(10, 37, 64, 0.06);
    border-radius: 14px;
    box-shadow: 0 4px 12px rgba(10, 37, 64, 0.04);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    cursor: pointer;
    text-decoration: none;
    color: inherit;
}

.biz-news-item:hover {
    transform: translateY(-4px) translateX(4px);
    border-color: rgba(74, 158, 255, 0.2);
    box-shadow: var(--shadow-business);
    color: inherit;
}

.biz-news-date {
    flex-shrink: 0;
    text-align: center;
    padding: 0.5rem 0.75rem;
    background: linear-gradient(135deg, rgba(74, 158, 255, 0.08) 0%, rgba(212, 165, 116, 0.08) 100%);
    border-radius: 10px;
    min-width: 56px;
}

.biz-news-date-day {
    font-size: 1.25rem;
    font-weight: 800;
    color: #0a2540;
    line-height: 1;
}

.biz-news-date-month {
    font-size: 0.6875rem;
    color: #64748b;
    margin-top: 0.125rem;
}

.biz-news-content {
    flex: 1;
    min-width: 0;
}

.biz-news-tag {
    display: inline-block;
    padding: 0.125rem 0.5rem;
    background: rgba(74, 158, 255, 0.1);
    color: #4a9eff;
    font-size: 0.6875rem;
    font-weight: 600;
    border-radius: 50px;
    margin-bottom: 0.375rem;
}

.biz-news-title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: #0a2540;
    margin-bottom: 0.25rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    transition: color 0.2s ease;
}

.biz-news-item:hover .biz-news-title {
    color: #4a9eff;
}

.biz-news-desc {
    font-size: 0.8125rem;
    color: #64748b;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.biz-news-arrow {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    background: rgba(74, 158, 255, 0.08);
    color: #4a9eff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    transition: all 0.3s ease;
}

.biz-news-item:hover .biz-news-arrow {
    background: #4a9eff;
    color: #ffffff;
    transform: translateX(2px);
}

/* =========================================
   17. 商务级学科标签云
   ========================================= */
.biz-subjects {
    display: flex;
    flex-wrap: wrap;
    gap: 0.625rem;
    justify-content: center;
    padding: 1rem 0;
}

.biz-subject-tag {
    padding: 0.625rem 1.25rem;
    background: #ffffff;
    border: 1px solid rgba(10, 37, 64, 0.08);
    border-radius: 50px;
    color: #0a2540;
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 2px 8px rgba(10, 37, 64, 0.04);
}

.biz-subject-tag:hover {
    background: linear-gradient(135deg, #0a2540 0%, #1e3a5f 100%);
    color: #ffffff;
    border-color: transparent;
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(10, 37, 64, 0.2);
}

.biz-subject-tag.featured {
    background: linear-gradient(135deg, rgba(74, 158, 255, 0.1) 0%, rgba(212, 165, 116, 0.1) 100%);
    border-color: rgba(74, 158, 255, 0.3);
    color: #0a2540;
}

/* =========================================
   18. 商务级优势数据卡 (替代 adv-card)
   ========================================= */
.biz-advantage-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 1rem;
}

.biz-advantage-card {
    position: relative;
    text-align: center;
    padding: 1.75rem 1rem;
    background: #ffffff;
    border-radius: 16px;
    border: 1px solid rgba(10, 37, 64, 0.06);
    box-shadow: 0 4px 14px rgba(10, 37, 64, 0.04);
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.biz-advantage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #4a9eff 0%, #d4a574 100%);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.biz-advantage-card::after {
    content: '';
    position: absolute;
    bottom: -30px;
    right: -30px;
    width: 80px;
    height: 80px;
    background: radial-gradient(circle, rgba(212, 165, 116, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    transition: transform 0.6s ease;
}

.biz-advantage-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-business-lg);
    border-color: rgba(74, 158, 255, 0.15);
}

.biz-advantage-card:hover::before {
    transform: scaleX(1);
}

.biz-advantage-card:hover::after {
    transform: scale(2.5);
}

.biz-advantage-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 1rem;
    background: linear-gradient(135deg, #0a2540 0%, #1e3a5f 100%);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: #e8c89a;
    box-shadow: 0 8px 16px rgba(10, 37, 64, 0.15);
    position: relative;
    z-index: 1;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.biz-advantage-card:hover .biz-advantage-icon {
    transform: rotate(-6deg) scale(1.08);
}

.biz-advantage-value {
    font-size: 1.625rem;
    font-weight: 800;
    background: linear-gradient(135deg, #0a2540 0%, #1e3a5f 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.375rem;
    line-height: 1.1;
    letter-spacing: -0.02em;
    position: relative;
    z-index: 1;
}

.biz-advantage-desc {
    font-size: 0.8125rem;
    color: #64748b;
    line-height: 1.5;
    position: relative;
    z-index: 1;
}

/* =========================================
   19. 商务级区块背景变体
   ========================================= */
.biz-section {
    padding: 5rem 0;
    position: relative;
}

.biz-section-light {
    background: var(--gradient-business-soft);
    position: relative;
}

.biz-section-light::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(74, 158, 255, 0.3), transparent);
}

.biz-section-dark {
    background: var(--gradient-business);
    color: #ffffff;
    position: relative;
    overflow: hidden;
}

.biz-section-dark::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 60% 50% at 20% 50%, rgba(74, 158, 255, 0.1) 0%, transparent 60%),
        radial-gradient(ellipse 60% 50% at 80% 50%, rgba(212, 165, 116, 0.08) 0%, transparent 60%);
    pointer-events: none;
}

/* =========================================
   20. 商务级覆盖原组件默认样式
   ========================================= */

/* 让原 service-card 走商务风格 */
.biz-section .service-card {
    background: #ffffff;
    border: 1px solid rgba(10, 37, 64, 0.06);
    box-shadow: 0 4px 12px rgba(10, 37, 64, 0.04);
    border-radius: 16px;
    padding: 1.5rem 1.25rem;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.biz-section .service-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-business-lg);
    border-color: rgba(74, 158, 255, 0.2);
}

.biz-section .service-icon {
    background: linear-gradient(135deg, #0a2540 0%, #1e3a5f 100%);
    color: #e8c89a;
    box-shadow: 0 8px 16px rgba(10, 37, 64, 0.18);
    width: 48px;
    height: 48px;
    font-size: 1.375rem;
}

.biz-section .service-title {
    color: #0a2540;
    font-weight: 700;
}

/* =========================================
   21. 响应式
   ========================================= */
@media (max-width: 1024px) {
    .hero-business { padding: 4rem 0 3.5rem; }
    .hero-business .hero-title { font-size: 2.75rem; }
    .hero-business .hero-title-sub { font-size: 1.25rem; }
    .hero-business .hero-title-main { font-size: 3rem; }

    .metrics-grid { grid-template-columns: repeat(2, 1fr); gap: 1rem 0; }
    .metric-item:nth-child(2)::after { display: none; }

    .biz-section-title { font-size: 1.875rem; }
    .biz-cta-title { font-size: 2rem; }
    .biz-page-banner-title { font-size: 2rem; }

    .biz-advantage-grid { grid-template-columns: repeat(3, 1fr); }
    .biz-flow-grid { grid-template-columns: repeat(3, 1fr); }
    .biz-flow-item::after { display: none; }
    .biz-news-list { grid-template-columns: 1fr; }
    .biz-footer-grid { grid-template-columns: repeat(2, 1fr); }
    .biz-stats-grid { grid-template-columns: repeat(2, 1fr); gap: 0.875rem; }
}

@media (max-width: 768px) {
    .hero-business { padding: 3rem 0 2.5rem; }
    .hero-business .hero-title { font-size: 2.125rem; }
    .hero-business .hero-title-sub { font-size: 1.0625rem; }
    .hero-business .hero-title-main { font-size: 2.375rem; }
    .hero-business .hero-subtitle { font-size: 0.9375rem; }

    .metrics-section { padding: 1.25rem 0.75rem; }
    .metrics-grid { grid-template-columns: repeat(2, 1fr); gap: 1rem 0; }
    .metric-item:nth-child(2)::after { display: none; }
    .metric-value { font-size: 2rem; }
    .metric-label { font-size: 0.75rem; }

    .biz-cta { padding: 3.5rem 0; }
    .biz-cta-title { font-size: 1.75rem; }
    .biz-cta-actions { flex-direction: column; align-items: stretch; }
    .btn-business { width: 100%; }

    .biz-section { padding: 3.5rem 0; }
    .biz-section-title { font-size: 1.625rem; }
    .biz-section-subtitle { font-size: 0.9375rem; }

    .biz-page-banner { padding: 3rem 0 2.5rem; }
    .biz-page-banner-title { font-size: 1.875rem; }

    .biz-flow-grid { grid-template-columns: repeat(2, 1fr); }
    .biz-advantage-grid { grid-template-columns: repeat(2, 1fr); gap: 0.75rem; }
    .biz-advantage-card { padding: 1.25rem 0.75rem; }
    .biz-advantage-value { font-size: 1.375rem; }

    .biz-tabs { padding: 0.25rem; }
    .biz-tab-btn { padding: 0.5rem 1rem; font-size: 0.875rem; }

    .biz-footer { padding: 3rem 0 1.25rem; }
    .biz-footer-grid { grid-template-columns: 1fr; gap: 2rem; }
    .biz-footer-stats { flex-wrap: wrap; gap: 1.25rem; }

    .biz-news-item { padding: 1rem 1.125rem; gap: 1rem; }

    .biz-metrics-row { grid-template-columns: repeat(2, 1fr); gap: 0.75rem; }

    .biz-stats-grid { grid-template-columns: repeat(2, 1fr); }
    .biz-stat-number { font-size: 2.125rem; }

    .biz-cta-eyebrow { font-size: 0.75rem; }
}

@media (max-width: 480px) {
    .hero-business .hero-title { font-size: 1.875rem; }
    .hero-business .hero-title-main { font-size: 2rem; }
    .hero-business .hero-subtitle { font-size: 0.875rem; }
    .metrics-section { margin-top: 2rem; }
    .metric-value { font-size: 1.75rem; }
    .biz-section-title { font-size: 1.5rem; }
}

/* =========================================
   22. 入场动画增强
   ========================================= */
.biz-fade-up {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.biz-fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.biz-fade-up.delay-1 { transition-delay: 0.1s; }
.biz-fade-up.delay-2 { transition-delay: 0.2s; }
.biz-fade-up.delay-3 { transition-delay: 0.3s; }
.biz-fade-up.delay-4 { transition-delay: 0.4s; }
.biz-fade-up.delay-5 { transition-delay: 0.5s; }

/* 减少动画 - 用户偏好 */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}