/* ========================================
   北京尧图网络科技有限公司 - 全局样式
   中式人文风 | 竹青 + 米白 + 墨黑
   ======================================== */

:root {
    --zhuking: #5D8B6E;
    --zhuking-light: #7BA88A;
    --zhuking-dark: #3D5F4A;
    --miwhite: #F5F1E8;
    --miwhite-dark: #EBE5D5;
    --mohei: #1A1A1A;
    --mohei-light: #333333;
    --text-gray: #666666;
    --border-color: #D4CFC4;
    --shadow: 0 4px 20px rgba(93, 139, 110, 0.15);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background-color: var(--miwhite);
    color: var(--mohei);
    line-height: 1.8;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul, ol {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
    position: relative;
}

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

.section-title h2 {
    font-size: 2.5rem;
    color: var(--mohei);
    margin-bottom: 16px;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--zhuking), var(--zhuking-light));
}

.section-title p {
    color: var(--text-gray);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* 波浪曲线分割 */
.wave-divider {
    position: absolute;
    left: 0;
    width: 100%;
    overflow: hidden;
    line-height: 0;
}

.wave-divider.top {
    top: 0;
    transform: rotate(180deg);
}

.wave-divider.bottom {
    bottom: 0;
}

.wave-divider svg {
    position: relative;
    display: block;
    width: calc(100% + 1.3px);
    height: 80px;
}

.wave-divider .shape-fill {
    fill: var(--miwhite);
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: transparent;
    transition: var(--transition);
    padding: 20px 0;
}

.navbar.scrolled {
    background: rgba(245, 241, 232, 0.98);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    padding: 15px 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo img {
    height: 50px;
    width: auto;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--mohei);
}

.nav-menu {
    display: flex;
    gap: 40px;
}

.nav-link {
    font-size: 1rem;
    color: var(--mohei);
    position: relative;
    padding: 8px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--zhuking);
    transition: var(--transition);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-link:hover,
.nav-link.active {
    color: var(--zhuking);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--mohei);
    transition: var(--transition);
}

/* 页脚 */
.footer {
    background: var(--mohei);
    color: var(--miwhite);
    padding: 80px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    margin-bottom: 60px;
}

.footer-section h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: var(--zhuking-light);
}

.footer-section p,
.footer-section a {
    color: rgba(245, 241, 232, 0.8);
    line-height: 2;
    display: block;
}

.footer-section a:hover {
    color: var(--zhuking-light);
}

.footer-bottom {
    border-top: 1px solid rgba(245, 241, 232, 0.2);
    padding-top: 30px;
    text-align: center;
    color: rgba(245, 241, 232, 0.6);
}

/* 按钮 */
.btn {
    display: inline-block;
    padding: 14px 32px;
    background: var(--zhuking);
    color: var(--miwhite);
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
}

.btn:hover {
    background: var(--zhuking-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--zhuking);
    color: var(--zhuking);
}

.btn-outline:hover {
    background: var(--zhuking);
    color: var(--miwhite);
}

/* 卡片 */
.card {
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(93, 139, 110, 0.25);
}

.card-img {
    width: 100%;
    height: 220px;
    object-fit: cover;
}

.card-body {
    padding: 24px;
}

.card-title {
    font-size: 1.3rem;
    margin-bottom: 12px;
    color: var(--mohei);
}

.card-text {
    color: var(--text-gray);
    line-height: 1.8;
}

/* 动画 */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* 响应式 */
@media (max-width: 1024px) {
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .section {
        padding: 80px 0;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--miwhite);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 30px;
        transition: var(--transition);
    }

    .nav-menu.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .section-title h2 {
        font-size: 2rem;
    }
}

/* 资讯列表样式 */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 30px;
}

.news-item {
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.news-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(93, 139, 110, 0.2);
}

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

.news-content {
    padding: 20px;
}

.news-title {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--mohei);
}

.news-excerpt {
    color: var(--text-gray);
    font-size: 0.95rem;
    margin-bottom: 15px;
    line-height: 1.6;
}

.news-meta {
    display: flex;
    justify-content: space-between;
    color: var(--text-gray);
    font-size: 0.85rem;
}