@font-face {
	font-family: 'SourceHanSerif';
	src: url('../fonts/SourceHanSerifCN-Medium-6.otf') format('opentype'),
		 /*  */;
		 font-weight: normal;
		font-style: normal;
		font-display: swap; /* 优化加载体验 */
	/*  */
}
@font-face {
	font-family: 'SourceHanSerifBold';
	src: url('../fonts/SourceHanSerifCN-Heavy-4.otf') format('opentype');
		font-weight: bold;
		font-style: normal;
		font-display: swap;
}
/* ========== 全局重置 & 变量 ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.document {
			text-align: center;
            max-width: 900px;
            margin: 0 auto;
			border: 0 1cm;
            padding: 0;
            background: transparent;
        }

body {
    font-family: 'SourceHanSerif','SourceHanSerifBold';
    background-color: #f9fafb;
    color: #1f2937;
    line-height: 1.5;
    scroll-behavior: smooth;
}
h1{
	text-align: center;
	font-size: x-large;
	font-family: 'SourceHanSerifBold';
	font-style: bold;
}
h2{
	text-align: center;
	font-size: large;
	font-family: 'SourceHanSerifBold';
	font-style: bold;
}
.frontier {
	margin: 0 10px;
	font-family: 'SourceHanSerifBold';
	font-style: bold;
}
.special{
	font-family: 'SourceHanSerifBold';
	font-weight: bold;
}
/* 引入 Google Fonts 'Inter', sans-serif, */
/*@import url('https://fonts.googleapis.com/css2?family=Inter:opsz,wght@14..32,300;14..32,400;14..32,600;14..32,700&display=swap');*/
/* 容器控制 max-width: 1280px;*/
.container {
    
    margin: 0 80px;
    padding: 0 24px;
}

/* ========== 顶部导航栏 ========== */
.navbar {
    background-color: #ffffff;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(2px);
    border-bottom: 1px solid #e5e7eb;
}

.nav-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    padding: 0.9rem 0;
}

.logo-area {
    font-weight: 700;
    font-size: 1.5rem;
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
    letter-spacing: -0.3px;
}

.logo-area i {
    background: none;
    color: #3b82f6;
    margin-right: 6px;
}

.nav-links {
    display: flex;
    gap: 1.8rem;
    flex-wrap: wrap;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    font-weight: 600;
    color: #374151;
    transition: color 0.2s;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.nav-links a i {
    font-size: 0.9rem;
}

.nav-links a:hover {
    color: #3b82f6;
}

/* 响应式导航 */
@media (max-width: 700px) {
    .nav-container {
        flex-direction: column;
        gap: 12px;
    }
    .nav-links {
        justify-content: center;
        gap: 1.2rem;
    }
}

/* ========== 轮播区域 ========== */
.hero-carousel {
	margin: 0 20px;
/*    background-color: #eef2ff;*/
    margin-top: 0;
    padding: 2rem 0;
}

.carousel-wrapper {
    position: relative;
    border-radius: 28px;
    overflow: hidden;
    box-shadow: 0 20px 35px -12px rgba(0, 0, 0, 0.2);
}

.carousel-slides {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    background: #d9e2ef;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 0.7s ease-in-out;
    border-radius: 0;
}

.slide.active {
    opacity: 1;
    z-index: 1;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.5);
    color: white;
    border: none;
    width: 44px;
    height: 44px;
    border-radius: 60px;
    cursor: pointer;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
    z-index: 20;
    backdrop-filter: blur(4px);
}

.carousel-btn:hover {
    background: rgba(0, 0, 0, 0.8);
}

.btn-prev {
    left: 20px;
}

.btn-next {
    right: 20px;
}

.carousel-dots {
    position: absolute;
    bottom: 18px;
    left: 0;
    right: 0;
    display: flex;
    justify-content: center;
    gap: 12px;
    z-index: 20;
}

.dot {
    width: 10px;
    height: 10px;
    background-color: rgba(255, 255, 255, 0.6);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.2s;
}

.dot.active {
    background-color: #ffffff;
    width: 24px;
    border-radius: 10px;
    background-color: #3b82f6;
}

/* ========== 图文板块样式 ========== */
.sections-wrapper {
    margin: 4rem 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3rem;
}

.feature-block {
    display: flex;
    flex-direction: column;      /* 关键：改为纵向排列，图片在上文字在下 */
    align-items: center;         /* 水平居中 */
    justify-content: center;
    width: 100%;
    max-width: 1200px;             /*每个卡片的固定最大宽度，自适应屏幕 */
    background: #ffffff;
    border-radius: 1.5rem;
    padding: 0;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s, box-shadow 0.3s;
    overflow: hidden;
    scroll-margin-top: 80px;
}

.feature-block:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
}

/* 图片容器 - 宽度自适应，保持比例 */
.block-image {
    width: 100%;
    overflow: hidden;
    border-radius: 1.5rem 1.5rem 0 0;
}

.block-image img {
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;       /* 统一图片比例，美观且自适应 */
    object-fit: cover;
    display: block;
    transition: transform 0.4s;
}

.feature-block:hover .block-image img {
    transform: scale(1.03);
}

.block-content {
    flex: 1;
    padding: 0.5rem;
}

.block-content h2 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    letter-spacing: -0.3px;
    background: linear-gradient(145deg, #1e293b, #2d3a4e);
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
}

.block-content h2 i {
    margin-right: 10px;
    color: #3b82f6;
    background: none;
}

.block-content p {
    color: #4b5563;
    margin: 1rem 0 1.2rem;
    font-size: 1rem;
    line-height: 1.5;
}

.badge {
    display: inline-block;
    background-color: #eef2ff;
    padding: 0.25rem 0.8rem;
    border-radius: 40px;
    font-size: 0.8rem;
    font-weight: 600;
    color: #2563eb;
}

/* 响应式 */
@media (max-width: 800px) {
    .feature-block {
        flex-direction: column;
        text-align: center;
        gap: 1.5rem;
        padding: 1.2rem;
    }
    .block-content {
        text-align: center;
    }
}

/* 分割装饰 */
.section-divider {
    text-align: center;
    margin: 2rem 0 1rem;
    font-size: 0.9rem;
    color: #94a3b8;
}

/* ========== 页脚 ========== */
footer {
    background: #111827;
    color: #cbd5e1;
    padding: 2rem 0;
    text-align: center;
    margin-top: 3rem;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px;
}

@media (max-width: 640px) {
    .footer-inner {
        flex-direction: column;
    }
}