@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700&display=swap');

body {
    font-family: 'Noto Sans SC', sans-serif;
    line-height: 1.8;
    margin: 0;
    padding: 0;
    background: linear-gradient(to right, #eef2f3, #f0f2f5);
    color: #444;
    overflow-x: hidden;
}

.container {
    max-width: 1000px;
    margin: auto;
    padding: 0 20px;
}

header {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    border-bottom: 1px solid #e0e0e0;
    text-align: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

header .logo {
    max-height: 50px;
    border-radius: 10px;
    vertical-align: middle;
}

header h1 {
    display: inline-block;
    vertical-align: middle;
    margin: 0 0 0 15px;
    font-size: 1.6rem;
    font-weight: 500;
    color: #333;
}

nav ul {
    padding: 0;
    list-style: none;
    display: inline-block;
    margin: 10px 0 0;
}

nav li {
    display: inline;
    margin: 0 10px;
}

nav a {
    text-decoration: none;
    color: #555;
    font-weight: 500;
    padding: 8px 15px;
    border-radius: 8px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

nav a.active {
    color: #fff;
    background-color: #007bff;
    box-shadow: 0 4px 12px rgba(0, 123, 255, 0.3);
}

nav a:hover {
    color: #007bff;
}

nav a.active:hover {
    color: #fff;
}

.ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: scale(0);
    animation: ripple-effect 0.6s linear;
}

@keyframes ripple-effect {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

main {
    padding: 50px 20px;
}

.card {
    background: #fff;
    margin-bottom: 20px;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.07);
    display: none;
    animation: section-fade-in 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.card.active {
    display: block;
}

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

.card .anim-item {
    opacity: 0;
    transform: translateY(20px);
    animation: item-fade-in 0.5s forwards;
}

h2 {
    color: #0056b3;
    border-bottom: 2px solid #007bff;
    padding-bottom: 10px;
    margin-top: 0;
    font-weight: 700;
}

.intro-layout {
    display: flex;
    align-items: center;
    gap: 40px;
}

.intro-text {
    flex: 1.5;
}

.intro-image {
    flex: 1;
    text-align: center;
}

.intro-image img {
    max-width: 100%;
    border-radius: 15px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}

.intro-text h2 {
    margin-bottom: 20px;
}

.intro-text p {
    font-size: 1.1rem;
    color: #555;
    text-align: left;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.service-item {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 15px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.service-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
}

.service-item img {
    max-width: 80px;
    height: auto;
    border-radius: 10px;
    margin-bottom: 15px;
}

.service-item h3 {
    color: #333;
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.service-item p {
    font-size: 0.95rem;
    color: #666;
}

.service-icon {
    width: 64px;
    height: 64px;
    border-radius: 18px;
    margin: 0 auto 16px;
    position: relative;
    background: linear-gradient(135deg, #e3f2ff, #c2e0ff);
    box-shadow: 0 6px 16px rgba(79, 70, 229, 0.25);
}

/* 医疗IP打造：头像 + 星标 */
.service-icon.ip-icon::before,
.service-icon.ip-icon::after {
    content: '';
    position: absolute;
}

.service-icon.ip-icon::before {
    /* 头像圆形 */
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: #ffffff;
    top: 12px;
    left: 10px;
}

.service-icon.ip-icon::after {
    /* 右上角星星 */
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-bottom: 12px solid #ffb300;
    top: 10px;
    right: 8px;
}

/* AI数字人：数字人头像 + 电路线条 */
.service-icon.ai-icon {
    background: linear-gradient(135deg, #e8e9ff, #d2d4ff);
}

.service-icon.ai-icon::before,
.service-icon.ai-icon::after {
    content: '';
    position: absolute;
}

.service-icon.ai-icon::before {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    border: 2px solid #4b5cff;
    top: 14px;
    left: 16px;
}

.service-icon.ai-icon::after {
    width: 24px;
    height: 12px;
    border-radius: 6px;
    border: 2px solid #4b5cff;
    border-top: none;
    top: 32px;
    left: 18px;
}

/* 内容策略：文档+折线图 */
.service-icon.content-icon {
    background: linear-gradient(135deg, #e6f7ff, #ccefff);
}

.service-icon.content-icon::before,
.service-icon.content-icon::after {
    content: '';
    position: absolute;
}

.service-icon.content-icon::before {
    /* 文档卡片 */
    width: 32px;
    height: 40px;
    border-radius: 6px;
    background: #ffffff;
    top: 10px;
    left: 16px;
}

.service-icon.content-icon::after {
    /* 右下角折线 */
    border-left: 2px solid #29b6f6;
    border-bottom: 2px solid #29b6f6;
    width: 16px;
    height: 10px;
    transform: skewX(-15deg);
    bottom: 14px;
    right: 14px;
}

/* 账号运营：三条进度条 */
.service-icon.ops-icon {
    background: linear-gradient(135deg, #f3e5f5, #e1bee7);
}

.service-icon.ops-icon::before,
.service-icon.ops-icon::after {
    content: '';
    position: absolute;
}

.service-icon.ops-icon::before {
    width: 40px;
    height: 4px;
    border-radius: 2px;
    background: #7b1fa2;
    top: 18px;
    left: 12px;
    box-shadow:
        0 8px 0 0 rgba(123, 31, 162, 0.7),
        0 16px 0 0 rgba(123, 31, 162, 0.4);
}

/* 数据分析：圆形图+柱状图 */
.service-icon.data-icon {
    background: linear-gradient(135deg, #e8f5e9, #c8e6c9);
}

.service-icon.data-icon::before,
.service-icon.data-icon::after {
    content: '';
    position: absolute;
}

.service-icon.data-icon::before {
    /* 圆形图 */
    width: 26px;
    height: 26px;
    border-radius: 50%;
    border: 4px solid #43a047;
    border-top-color: transparent;
    border-right-color: transparent;
    top: 12px;
    left: 10px;
}

.service-icon.data-icon::after {
    /* 柱状图 */
    width: 14px;
    height: 18px;
    border-radius: 3px 3px 0 0;
    background: #43a047;
    bottom: 12px;
    right: 12px;
}

footer {
    text-align: center;
    padding: 20px 0;
    background: #343a40;
    color: #fff;
}

/* Animation Delays */
.card.active .anim-item:nth-child(1) { animation-delay: 0.2s; }
.card.active .anim-item:nth-child(2) { animation-delay: 0.3s; }
.card.active .anim-item:nth-child(3) { animation-delay: 0.4s; }
.card.active .anim-item:nth-child(4) { animation-delay: 0.5s; }
.card.active .anim-item:nth-child(5) { animation-delay: 0.6s; }
.card.active .services-grid .anim-item:nth-child(1) { animation-delay: 0.2s; }
.card.active .services-grid .anim-item:nth-child(2) { animation-delay: 0.3s; }
.card.active .services-grid .anim-item:nth-child(3) { animation-delay: 0.4s; }
.card.active .services-grid .anim-item:nth-child(4) { animation-delay: 0.5s; }
.card.active .services-grid .anim-item:nth-child(5) { animation-delay: 0.6s; }


@keyframes item-fade-in {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 成功案例：三卡片横向并排，带渐进式呈现效果 */
#cases h2 {
    text-align: left;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    column-gap: 18px;
}

.case-card {
    background: #f9fafb;
    border-radius: 14px;
    padding: 10px 11px 12px;
    box-shadow: 0 3px 10px rgba(15, 23, 42, 0.04);
    border: 1px solid rgba(148, 163, 184, 0.35);
    display: flex;
    flex-direction: column;
    gap: 6px;
    opacity: 0;
    transform: translateY(20px);
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease, opacity 0.25s ease;
}

/* 渐进式呈现：依赖已有的 .card.active .anim-item 动画，按顺序淡入 */
.card.active .cases-grid .case-card:nth-child(1) { animation: item-fade-in 0.5s forwards 0.2s; }
.card.active .cases-grid .case-card:nth-child(2) { animation: item-fade-in 0.5s forwards 0.3s; }
.card.active .cases-grid .case-card:nth-child(3) { animation: item-fade-in 0.5s forwards 0.4s; }

.case-card:hover {
    transform: translateY(-4px) scale(1.01);
    box-shadow: 0 10px 24px rgba(15, 23, 42, 0.12);
    border-color: #3b82f6;
}

.case-media {
    display: flex;
    gap: 6px;
}

.case-media img {
    flex: 1;
    max-width: 50%;
    border-radius: 8px;
    object-fit: cover;
}

.case-info h3 {
    margin: 0 0 3px;
    font-size: 0.95rem;
    color: #111827;
}

.case-info p {
    margin: 0;
    font-size: 0.84rem;
    color: #4b5563;
    line-height: 1.6;
}

@media (max-width: 900px) {
    .cases-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        row-gap: 12px;
    }
}

@media (max-width: 600px) {
    .cases-grid {
        grid-template-columns: 1fr;
    }
}

/* 行业机遇模块：纵向时间线风格，与核心业务区分开 */
#opportunity h2 {
    text-align: left;
}

.opportunity-grid {
    max-width: 780px;
    margin: 0 auto;
    position: relative;
    padding-left: 26px; /* 给左边时间线留空间 */
}

/* 竖直时间线 */
.opportunity-grid::before {
    content: '';
    position: absolute;
    left: 11px;
    top: 6px;
    bottom: 6px;
    width: 2px;
    background: linear-gradient(to bottom, rgba(148,163,184,0.7), rgba(148,163,184,0.1));
}

.opportunity-item {
    position: relative;
    padding: 14px 18px 14px 24px;
    margin-bottom: 12px;
    border-radius: 14px;
    background: rgba(248, 250, 252, 0.95);
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.04);
    border: 1px solid rgba(148, 163, 184, 0.25);
    display: block;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.opportunity-item:last-child {
    margin-bottom: 0;
}

/* 时间线圆点 */
.opportunity-item::before {
    content: '';
    position: absolute;
    left: -4px;
    top: 20px;
    width: 12px;
    height: 12px;
    border-radius: 999px;
    background: #3b82f6;
    box-shadow: 0 0 0 4px rgba(59,130,246,0.18);
}

/* 弱化行业机遇的小图标，不再占主要视觉，比核心业务轻一点 */
.opportunity-icon {
    position: absolute;
    right: 16px;
    top: 14px;
    width: 26px;
    height: 26px;
    border-radius: 999px;
    background: linear-gradient(135deg, #e0f2fe, #bfdbfe);
    box-shadow: 0 3px 8px rgba(37, 99, 235, 0.25);
}

/* 行业机遇文本区：左对齐，阅读感更强 */
.opportunity-text h3 {
    margin: 0 0 4px;
    font-size: 1.02rem;
    color: #0f172a;
}

.opportunity-text p {
    margin: 0;
    font-size: 0.94rem;
    color: #4b5563;
    line-height: 1.75;
}

.opportunity-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 24px rgba(15, 23, 42, 0.08);
    border-color: #3b82f6;
    background-color: #ffffff;
}

@media (max-width: 768px) {
    .opportunity-grid {
        padding-left: 20px;
    }

    .opportunity-item {
        padding-right: 14px;
    }

    .opportunity-icon {
        display: none; /* 小屏上直接隐藏图标，突出文字 */
    }
}

/* 解决方案模块：横向步骤流布局，与核心业务/行业机遇区分 */
#solution h2 {
    text-align: left;
}

.solution-grid {
    display: flex;
    flex-wrap: nowrap;
    gap: 18px;
    align-items: stretch;
    overflow-x: auto;
    padding-bottom: 4px;
    position: relative;
}

/* 底部浅色连线，体现“步骤流程感” */
.solution-grid::before {
    content: '';
    position: absolute;
    left: 32px;
    right: 32px;
    bottom: 22px;
    height: 2px;
    background: linear-gradient(90deg, rgba(129,140,248,0.25), rgba(129,140,248,0.05));
    pointer-events: none;
}

.solution-item {
    min-width: 210px;
    flex: 0 0 210px;
    background: #f9fafb;
    border-radius: 18px;
    padding: 18px 18px 22px;
    box-shadow: 0 4px 14px rgba(15, 23, 42, 0.04);
    border: 1px solid rgba(148, 163, 184, 0.35);
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease, background-color 0.25s ease;
}

.solution-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 28px rgba(79, 70, 229, 0.16);
    border-color: #4f46e5;
    background-color: #ffffff;
}

/* 顶部圆形步骤编号，替代大面积图标 */
.solution-icon {
    width: 30px;
    height: 30px;
    border-radius: 999px;
    margin-bottom: 10px;
    position: relative;
    background: linear-gradient(135deg, #eef2ff, #e0e7ff);
    box-shadow: 0 3px 8px rgba(79, 70, 229, 0.35);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 600;
    color: #4338ca;
}

/* 给每个解决方案一个步骤编号 1-5 */
.solution-item:nth-child(1) .solution-icon::after { content: '1'; }
.solution-item:nth-child(2) .solution-icon::after { content: '2'; }
.solution-item:nth-child(3) .solution-icon::after { content: '3'; }
.solution-item:nth-child(4) .solution-icon::after { content: '4'; }
.solution-item:nth-child(5) .solution-icon::after { content: '5'; }

.solution-item h3 {
    margin: 0 0 6px;
    font-size: 1.02rem;
    color: #111827;
}

.solution-item p {
    margin: 0;
    font-size: 0.92rem;
    color: #4b5563;
    line-height: 1.7;
}

@media (max-width: 768px) {
    .solution-grid {
        flex-wrap: nowrap;
        gap: 12px;
    }

    .solution-item {
        min-width: 200px;
    }

    .solution-grid::before {
        left: 24px;
        right: 24px;
    }
}

/* 解决方案模块：圆环布局，体现闭环方案感 */
#solution h2 {
    text-align: left;
}

.solution-ring {
    max-width: 900px;
    margin: 24px auto 0;
}

/* 中心说明块：略收缩，给外圈文字更多空间 */
.solution-center {
    border-radius: 24px;
    background: radial-gradient(circle at top, #eef2ff, #ffffff);
    box-shadow: 0 12px 32px rgba(15, 23, 42, 0.08);
    padding: 20px 24px;
    text-align: left;
    margin-bottom: 20px;
}

.solution-center h3 {
    margin: 0 0 8px;
    font-size: 1.15rem;
    color: #111827;
}

.solution-center p {
    margin: 0;
    font-size: 0.95rem;
    color: #4b5563;
    line-height: 1.8;
}

/* 外圈方案点容器 */
.solution-ring-items {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 18px;
}

.solution-item {
    position: static;
    width: auto;
    max-width: 100%;
    padding: 14px 16px 16px;
    border-radius: 16px;
    background: #f9fafb;
    box-shadow: 0 4px 14px rgba(15, 23, 42, 0.04);
    border: 1px solid rgba(148, 163, 184, 0.45);
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease, background-color 0.25s ease;
}

.solution-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 14px 30px rgba(79, 70, 229, 0.18);
    border-color: #4f46e5;
    background-color: #ffffff;
}

.solution-item h4 {
    margin: 0 0 4px;
    font-size: 0.98rem;
    color: #111827;
}

.solution-item p {
    margin: 0;
    font-size: 0.9rem;
    color: #4b5563;
    line-height: 1.7;
}

.solution-icon {
    width: 32px;
    height: 32px;
    border-radius: 999px;
    margin-bottom: 8px;
    position: relative;
    background: linear-gradient(135deg, #eef2ff, #e0e7ff);
    box-shadow: 0 3px 8px rgba(79, 70, 229, 0.35);
}

@media (max-width: 768px) {
    .solution-ring {
        margin-top: 16px;
    }
}

/* 成功案例：三卡片横向并排，带渐进式呈现效果 */
#cases h2 {
    text-align: left;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    column-gap: 18px;
}

.case-card {
    background: #f9fafb;
    border-radius: 14px;
    padding: 10px 11px 12px;
    box-shadow: 0 3px 10px rgba(15, 23, 42, 0.04);
    border: 1px solid rgba(148, 163, 184, 0.35);
    display: flex;
    flex-direction: column;
    gap: 6px;
    opacity: 0;
    transform: translateY(20px);
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease, opacity 0.25s ease;
}

/* 渐进式呈现：依赖已有的 .card.active .anim-item 动画，按顺序淡入 */
.card.active .cases-grid .case-card:nth-child(1) { animation: item-fade-in 0.5s forwards 0.2s; }
.card.active .cases-grid .case-card:nth-child(2) { animation: item-fade-in 0.5s forwards 0.3s; }
.card.active .cases-grid .case-card:nth-child(3) { animation: item-fade-in 0.5s forwards 0.4s; }

.case-card:hover {
    transform: translateY(-4px) scale(1.01);
    box-shadow: 0 10px 24px rgba(15, 23, 42, 0.12);
    border-color: #3b82f6;
}

.case-media {
    display: flex;
    gap: 6px;
}

.case-media img {
    flex: 1;
    max-width: 50%;
    border-radius: 8px;
    object-fit: cover;
}

.case-info h3 {
    margin: 0 0 3px;
    font-size: 0.95rem;
    color: #111827;
}

.case-info p {
    margin: 0;
    font-size: 0.84rem;
    color: #4b5563;
    line-height: 1.6;
}

@media (max-width: 900px) {
    .cases-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        row-gap: 12px;
    }
}

@media (max-width: 600px) {
    .cases-grid {
        grid-template-columns: 1fr;
    }
}