body {
    font-family: "Microsoft YaHei", "微软雅黑", sans-serif;
    margin: 0;
    padding: 0;
    color: #444444;
    line-height: 1.6;
    font-size: 16px;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
    border-bottom: 1px solid #eee;
    background: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo-container {
    display: flex;
    align-items: center;
}

.logo-img {
    height: 45px;
    margin-right: 10px;
}

.logo-text {
    color: #0047AB;
    font-family: "Microsoft YaHei", "微软雅黑", sans-serif;
    font-size: 28px;
    font-weight: 900;
}

nav ul {
    display: flex;
    list-style: none;
    align-items: center;
    margin: 0;
    padding: 0;
}

nav ul li {
    margin-left: 20px;
    position: relative;
    height: 100%;
    display: flex;
    align-items: center;
}

nav ul li a {
    text-decoration: none;
    color: #444444;
    padding: 8px 12px;
    border-radius: 4px;
    transition: all 0.3s ease;
    position: relative;
    display: flex;
    align-items: center;
}

nav ul li a:hover {
    background-color: #f0f0f0;
    color: #0047AB;
}

nav ul li a.active {
    color: #0047AB;
}

nav ul li a.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: #0047AB;
}

.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
    text-align: center;
    background: #ffffff;
}

.big-logo {
    margin-bottom: 20px;
}

.big-logo img {
    height: 160px;
    width: auto;
}

h1 {
    font-family: Impact, "Arial Black", "微软雅黑", sans-serif;
    font-size: 50px;
    margin-bottom: 30px;
    line-height: 1.3;
    letter-spacing: 0.5px;
    color: #1a1a1a;
}

h1 span {
    display: block;
    margin-top: 10px;
    color: #0047AB;
    font-size: 45px;
}

.buttons {
    display: flex;
    justify-content: center;
    gap: 100px;
    margin: 40px 0;
}

.btn {
    padding: 12px 40px;
    background: linear-gradient(145deg, #f0f0f0, #e6e6e6);
    font-weight: bold;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-family: "Microsoft YaHei", "微软雅黑", sans-serif;
    font-size: 15px;
    transition: all 0.3s ease;
    text-decoration: none;
    color: #444444;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.btn:hover {
    background: linear-gradient(145deg, #e6e6e6, #f0f0f0);
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
}

/* 统一白色块样式 */
.description,
ul.features {
    max-width: 1200px;
    margin: 0 auto 40px;
    padding: 30px;
    background: rgba(182, 200, 244, 0.144);
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    width: 100%;
    box-sizing: border-box;
    text-align: left;
}

.description p {
    margin-bottom: 1.5em;
    font-size: 17px;
    color: #333;
}

.description strong {
    color: #0047AB;
    font-weight: 700;
}

/* 特定调整 */
ul.features {
    padding: 25px 40px;
    columns: 2;
    column-gap: 40px;
    /* border: 1px solid #eee; */
}

.stats-section {
    max-width: 1200px;
    margin: 60px auto;
    padding: 32px 16px;
    border-radius: 12px;
    background: #fff;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
}

/* 图片容器样式 */
div[style="text-align: center;"] {
    max-width: 1200px;
    margin: 0 auto 40px;
    padding: 30px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    width: 100%;
    box-sizing: border-box;
}

div[style="text-align: center;"] img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

.stats-container {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    margin-top: 40px;
}

.stat-box {
    flex: 1;
    text-align: left;
    padding: 20px;
    background-color: #f8f9fa;
    border-radius: 8px;
}

.stat-box h2 {
    color: #FF6F61;
    font-family: "Microsoft YaHei", "微软雅黑", sans-serif;
    font-size: 28px;
    font-weight: 900;
    margin-bottom: 20px;
}

.stat-box h3 {
    font-family: "Microsoft YaHei", "微软雅黑", sans-serif;
    font-size: 20px;
    font-weight: 900;
    margin: 15px 0 10px 0;
}

.stat-box ul {
    list-style: none;
    padding-left: 0;
    margin: 0;
}

.stat-box li {
    font-size: 16px;
    margin-bottom: 8px;
    color: #666666;
}

.scenario-section,
.metrics-section {
    margin-bottom: 20px;
}

@media (max-width: 768px) {
    .stats-container {
        flex-direction: column;
    }

    .stat-box {
        margin-bottom: 20px;
    }
}

.stats-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 32px;
    justify-content: center;
    align-items: stretch;
    width: 100%;
}

.stat-group {
    flex: 1 1 320px;
    max-width: 420px;
    min-width: 260px;
    box-sizing: border-box;
    margin: 0 auto;
    text-align: left;
    padding: 28px 22px;
    background: #ffffff;
    border-radius: 12px;
    border: 1px solid #eee;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    min-width: 0;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.stat-group:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
}

.stat-group h2 {
    font-size: 22px;
    margin-bottom: 16px;
    padding-bottom: 10px;
}

.stat-group span {
    margin: 16px 0 8px;
    font-size: 15px;
}

.stat-group ul {
    padding-left: 18px;
    margin: 0 0 10px 0;
}

.stat-group li {
    font-size: 15px;
    margin-bottom: 7px;
    padding-left: 20px;
    white-space: normal;
    overflow: visible;
    text-overflow: unset;
    width: 100%;
}

/* 去除 stat-group 列表项前的序号和图标 */
/* 移除 ::before 伪元素和计数器相关样式 */
/* .stat-group li::before, .stat-group.models li::before, .stat-group.scenarios li::before, .stat-group.metrics li::before { display: none !important; } */

.stat-group li::before,
.stat-group.models li::before,
.stat-group.scenarios li::before,
.stat-group.metrics li::before {
    display: none !important;
    content: none !important;
}

@media (max-width: 900px) {
    .stats-section {
        max-width: 100%;
        padding: 18px 4vw;
    }

    .stats-grid {
        gap: 18px;
    }

    .stat-group {
        max-width: 100%;
        min-width: 0;
        padding: 18px 8px;
    }
}

@media (max-width: 600px) {
    .stats-grid {
        flex-direction: column;
        gap: 14px;
    }

    .stat-group {
        padding: 12px 4px;
    }

    .stat-group h2 {
        font-size: 18px;
    }

    .stat-group li {
        font-size: 13px;
    }
}

.dropdown {
    position: relative;
    height: 100%;
    display: flex;
    align-items: center;
}

.dropdown-toggle {
    display: flex;
    align-items: center;
    white-space: nowrap;
}

.dropdown-toggle::after {
    content: '⌄';
    font-size: 14px;
    margin-left: 6px;
    opacity: 0.6;
    line-height: 0;
    position: relative;
    top: -2px;
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 0px);
    left: 0;
    background-color: white;
    min-width: 200px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    border-radius: 4px;
    padding: 8px 0;
    display: none;
    z-index: 1000;
}

.dropdown-menu li {
    margin: 0;
    height: auto;
}

.dropdown-menu a {
    font-size: 0.92em;
    padding: 8px 16px;
    display: block;
    white-space: nowrap;
    width: 100%;
}

.dropdown-menu a:hover {
    background-color: #f0f0f0;
}

.dropdown:hover .dropdown-menu {
    display: block;
}

.nav-icon {
    width: 16px;
    height: 16px;
    margin-left: 6px;
    vertical-align: middle;
}

#benchmark-text {
    color: #eb5d50;
}

.scenarios-section {
    max-width: 1200px;
    margin: 60px auto;
    padding: 32px 16px;
    border-radius: 12px;
    background: #fff;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
}

.scenarios-section h2 {
    text-align: center;
    font-size: 32px;
    color: #0047AB;
    margin-bottom: 40px;
}

.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    row-gap: 60px;
    padding: 20px;
    max-width: 1000px;
    margin: 0 auto;
}

/* 让第二排的两个卡片交错居中 */
.scenario-row2-center:nth-of-type(4) {
    grid-column: 1 / span 2;
}
.scenario-row2-center:nth-of-type(5) {
    grid-column: 2 / span 2;
}

.scenario-card {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

/* 让最后两个卡片居中 */
.scenario-card:nth-last-child(-n+2) {
    grid-column: span 1;
    margin: 0 auto;
    width: 100%;
    max-width: 300px;
}

.scenario-card:hover {
    transform: translateY(-5px);
}

.scenario-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.scenario-card h3 {
    padding: 20px 20px 10px;
    margin: 0;
    color: #0047AB;
    font-size: 20px;
}

.scenario-card p {
    padding: 0 20px 20px;
    margin: 0;
    color: #666;
    font-size: 16px;
    line-height: 1.5;
}

@media (max-width: 1024px) {
    .scenarios-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .scenario-row2-center {
        grid-column: 1 / span 2 !important;
    }
}

@media (max-width: 768px) {
    .scenarios-grid {
        grid-template-columns: 1fr;
    }
    .scenario-row2-center {
        grid-column: 1 / span 1 !important;
    }
}

.scenario-spacer {
    visibility: hidden;
    height: 0;
}

.stats-flex {
    display: flex;
    gap: 40px;
    justify-content: center;
    align-items: flex-start;
    flex-wrap: wrap;
}

.model-group, .metric-group {
    background: #f8f9fa;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    padding: 32px 28px;
    min-width: 260px;
    flex: 1 1 320px;
    max-width: 400px;
    text-align: left;
}

.model-group h2, .metric-group h2 {
    text-align: left;
    color: #0047AB;
    font-size: 26px;
    margin-bottom: 24px;
}

.model-list, .metric-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 14px;
    justify-content: flex-start;
    padding: 0;
    list-style: none;
}
.model-list li, .metric-list li {
    display: flex;
    align-items: center;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    padding: 10px 18px;
    font-weight: 500;
    font-size: 15px;
    margin: 0;
    min-width: 120px;
}
.icon-model, .icon-metric {
    margin-right: 8px;
    font-size: 18px;
    flex-shrink: 0;
}
.metric-block {
    margin-bottom: 24px;
}
.metric-title {
    display: block;
    font-weight: bold;
    color: #444;
    margin-bottom: 10px;
    font-size: 16px;
    text-align: left;
}
.subjective-list li {
    background: #ffe3e3;
    color: #c0392b;
}
.objective-list li {
    background: #e3eaff;
    color: #0047AB;
}

@media (max-width: 900px) {
    .stats-flex {
        flex-direction: column;
        align-items: stretch;
    }
    .model-group, .metric-group {
        max-width: 100%;
        margin-bottom: 24px;
    }
}

.stats-flex-vertical {
    display: flex;
    gap: 40px;
    justify-content: center;
    align-items: flex-start;
    flex-wrap: wrap;
}
.model-list-vertical, .metric-list-vertical {
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.model-card, .metric-card {
    display: flex;
    align-items: center;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    padding: 12px 18px;
    font-weight: 500;
    font-size: 15px;
    margin: 0;
    min-width: 180px;
    transition: box-shadow 0.2s;
}
.model-card:hover, .metric-card:hover {
    box-shadow: 0 4px 16px rgba(0,0,0,0.12);
}
.icon-model, .icon-metric {
    margin-right: 10px;
    font-size: 18px;
    flex-shrink: 0;
}
.metric-card.subjective {
    background: #ffe3e3;
    color: #c0392b;
}
.metric-card.objective {
    background: #e3eaff;
    color: #0047AB;
}
.model-group, .metric-group {
    background: #f8f9fa;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    padding: 32px 28px;
    min-width: 260px;
    flex: 1 1 320px;
    max-width: 400px;
    text-align: left;
}
.model-group h2, .metric-group h2 {
    text-align: left;
    color: #0047AB;
    font-size: 26px;
    margin-bottom: 24px;
}
.metric-block {
    margin-bottom: 24px;
}
.metric-title {
    display: block;
    font-weight: bold;
    color: #444;
    margin-bottom: 10px;
    font-size: 16px;
    text-align: left;
}
@media (max-width: 900px) {
    .stats-flex-vertical {
        flex-direction: column;
        align-items: stretch;
    }
    .model-group, .metric-group {
        max-width: 100%;
        margin-bottom: 24px;
    }
}

.model-group-horizontal, .metric-group-horizontal {
    background: #f8f9fa;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    padding: 32px 28px;
    margin-bottom: 32px;
    text-align: left;
    max-width: 100%;
    overflow-x: auto;
}
.model-group-horizontal h2, .metric-group-horizontal h2 {
    color: #0047AB;
    font-size: 26px;
    margin-bottom: 18px;
    text-align: center;
}
.model-list-horizontal, .metric-list-horizontal {
    display: flex;
    flex-direction: row;
    gap: 14px;
    flex-wrap: wrap;
    overflow-x: auto;
    padding-bottom: 4px;
}
.model-card, .metric-card {
    display: flex;
    align-items: center;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    padding: 12px 18px;
    font-weight: 500;
    font-size: 15px;
    margin: 0;
    min-width: 160px;
    transition: box-shadow 0.2s;
    white-space: nowrap;
}
.model-card:hover, .metric-card:hover {
    box-shadow: 0 4px 16px rgba(0,0,0,0.12);
}
.icon-model, .icon-metric {
    margin-right: 10px;
    font-size: 18px;
    flex-shrink: 0;
}
.metric-card.subjective {
    background: #ffe3e3;
    color: #c0392b;
}
.metric-card.objective {
    background: #e3eaff;
    color: #0047AB;
}
.metric-block-horizontal {
    margin-bottom: 18px;
}
.metric-title {
    display: block;
    font-weight: bold;
    color: #444;
    margin-bottom: 10px;
    font-size: 16px;
    text-align: left;
}
@media (max-width: 900px) {
    .model-group-horizontal, .metric-group-horizontal {
        padding: 20px 8px;
    }
    .model-list-horizontal, .metric-list-horizontal {
        gap: 8px;
    }
    .model-card, .metric-card {
        min-width: 120px;
        font-size: 14px;
        padding: 10px 10px;
    }
}

.center-flex {
    justify-content: center !important;
}

.model-outer-card, .metric-outer-card {
    background: #fff;
    border-radius: 18px;
    box-shadow: 0 6px 24px rgba(0,0,0,0.08);
    padding: 36px 30px 28px 30px;
    margin-bottom: 36px;
    text-align: center;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}
.model-outer-card h2, .metric-outer-card h2 {
    color: #0047AB;
    font-size: 28px;
    margin-bottom: 22px;
    text-align: center;
}
.metric-inner-card-subjective {
    background: #fff6f6;
    border-radius: 14px;
    box-shadow: 0 2px 10px rgba(255, 99, 71, 0.07);
    padding: 22px 18px 14px 18px;
    margin-bottom: 18px;
}
.metric-inner-card-objective {
    background: #f6f8ff;
    border-radius: 14px;
    box-shadow: 0 2px 10px rgba(0, 71, 171, 0.07);
    padding: 22px 18px 14px 18px;
    margin-bottom: 0;
}
.metric-title {
    text-align: left;
    margin-left: 8px;
}
@media (max-width: 900px) {
    .model-outer-card, .metric-outer-card {
        padding: 18px 4px 14px 4px;
    }
    .metric-inner-card-subjective, .metric-inner-card-objective {
        padding: 12px 4px 8px 4px;
    }
}

.features-card-group {
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
    justify-content: center;
    margin: 0 auto 40px auto;
    max-width: 1200px;
}
.feature-card {
    display: flex;
    align-items: center;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    padding: 16px 28px;
    font-size: 17px;
    font-weight: 500;
    color: #0047AB;
    min-width: 140px;
    transition: box-shadow 0.2s;
    gap: 14px;
}
.feature-card:hover {
    box-shadow: 0 4px 16px rgba(0,0,0,0.13);
}
.feature-img {
    width: 32px;
    height: 32px;
    object-fit: contain;
    margin-right: 8px;
    flex-shrink: 0;
    display: block;
}
.feature-card span {
    display: block;
    font-size: 17px;
    color: #0047AB;
    font-weight: 500;
}

@media (max-width: 900px) {
    .features-card-group {
        gap: 10px;
    }
    .feature-card {
        padding: 12px 12px;
        font-size: 15px;
        min-width: 100px;
    }
    .feature-img {
        font-size: 18px;
        margin-right: 7px;
    }
}

.features-title {
    text-align: center;
    font-size: 2.1em;
    color: #0047AB;
    font-weight: bold;
    margin-bottom: 24px;
    margin-top: 0;
}