/* ============================================
   云南合谷实业发展有限公司 - 企业门户模板
   参考云南黄金集团门户网站风格
   ============================================ */

/* === 基础重置 === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 90px;
}

body {
    font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "SimHei", sans-serif;
    color: #111;
    line-height: 1.6;
    background: #ffffff;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

ul, ol {
    list-style: none;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* === 顶部信息栏 === */
.top-bar {
    background: rgba(26,26,26,0.85);
    color: #ccc;
    font-size: 13px;
    padding: 8px 0;
    border-bottom: 1px solid rgba(51,51,51,0.5);
    backdrop-filter: blur(15px);
}

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

.top-bar a {
    color: #D9AB08;
    margin-left: 15px;
}

.top-bar a:hover {
    color: #fff;
}

/* === 主导航 === */
.main-header {
    background: rgba(255,255,255,0.85);
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: all 0.3s ease;
    backdrop-filter: blur(15px);
}

.main-header.scrolled {
    box-shadow: 0 2px 20px rgba(0,0,0,0.15);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

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

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

.logo-text {
    font-size: 22px;
    font-weight: bold;
    color: #D9AB08;
    letter-spacing: 2px;
}

.logo-text span {
    display: block;
    font-size: 12px;
    color: #666;
    font-weight: normal;
    letter-spacing: 1px;
}

/* 导航菜单 */
.main-nav {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.main-nav::-webkit-scrollbar {
    display: none;
}

.main-nav ul {
    display: flex;
    flex-wrap: nowrap;
    gap: 0;
}

.main-nav ul li a {
    display: block;
    padding: 12px 14px;
    font-size: 15px;
    color: #333;
    font-weight: 500;
    transition: all 0.3s;
    border-radius: 4px;
    position: relative;
    white-space: nowrap;
}

.main-nav ul li a:hover,
.main-nav ul li a.active {
    color: #D9AB08;
    background: rgba(217, 171, 8, 0.08);
}

.main-nav ul li a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 3px;
    background: #D9AB08;
    border-radius: 2px;
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
}

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 3px;
    background: #333;
    border-radius: 2px;
    transition: all 0.3s;
}

/* === 轮播Banner === */
.banner-section {
    margin-top: 85px;
    position: relative;
    width: 100%;
    height: 600px;
    overflow: hidden;
    background: transparent;
}

.banner-slider {
    position: relative;
    width: 100%;
    height: 100%;
}

.banner-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s ease;
    background-color: #1a1a1a;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

/* === 4 张 banner 背景图 === */
.banner-slider .banner-slide:nth-child(1) {
    background-image: url('../images/banner-1-company.jpg');
}
.banner-slider .banner-slide:nth-child(2) {
    background-image: url('../images/banner-2-rights.jpg');
}
.banner-slider .banner-slide:nth-child(3) {
    background-image: url('../images/banner-3-engineering.jpg');
}
.banner-slider .banner-slide:nth-child(4) {
    background-image: url('../images/banner-4-processing.jpg');
}

.banner-slide.active {
    opacity: 1;
}

.banner-slide .banner-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0,0,0,0.55) 0%, rgba(0,0,0,0.35) 50%, rgba(0,0,0,0.5) 100%);
}

/* 装饰性背景元素 */
.banner-slide .banner-decorative {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 1;
}

.banner-slide .banner-decorative::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 20s ease-in-out infinite;
}

.banner-slide .banner-decorative::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(217, 171, 8, 0.12) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 15s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(30px, -30px) scale(1.05); }
    50% { transform: translate(-20px, 20px) scale(0.95); }
    75% { transform: translate(15px, 15px) scale(1.02); }
}

.banner-slide .banner-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: #111;
    z-index: 2;
}

.banner-slide .banner-content h2 {
    font-size: 48px;
    font-weight: bold;
    margin-bottom: 20px;
    color: #ffffff;
    text-shadow: 0 2px 12px rgba(0,0,0,0.9), 0 1px 3px rgba(0,0,0,0.7);
    letter-spacing: 5px;
    animation: fadeInUp 0.8s ease-out;
}

.banner-slide .banner-content p {
    font-size: 20px;
    opacity: 1;
    color: #ffffff;
    max-width: 700px;
    margin: 0 auto;
    text-shadow: 0 2px 8px rgba(0,0,0,0.9), 0 1px 3px rgba(0,0,0,0.7);
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

/* 轮播控制按钮 */
.banner-nav {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 10;
}

.banner-nav .dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: rgba(0,0,0,0.2);
    border: 2px solid rgba(0,0,0,0.3);
    cursor: pointer;
    transition: all 0.4s ease;
}

.banner-nav .dot:hover {
    background: rgba(217, 171, 8, 0.6);
    border-color: #D9AB08;
    transform: scale(1.2);
}

.banner-nav .dot.active {
    background: #D9AB08;
    border-color: #fff;
    transform: scale(1.4);
    box-shadow: 0 0 10px rgba(217, 171, 8, 0.6);
}

.banner-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    background: rgba(255,255,255,0.6);
    color: #333;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    cursor: pointer;
    z-index: 10;
    transition: all 0.3s;
    border-radius: 50%;
}

.banner-arrow:hover {
    background: rgba(217, 171, 8, 0.7);
    color: #fff;
}

.banner-arrow.prev {
    left: 30px;
}

.banner-arrow.next {
    right: 30px;
}

/* === 通用区块样式 === */
.section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 36px;
    color: #1a1a1a;
    margin-bottom: 10px;
    position: relative;
    display: inline-block;
    text-shadow: 0 1px 3px rgba(255,255,255,0.8);
}

.section-header h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: #D9AB08;
    margin: 15px auto 0;
}

.section-header p {
    color: #222;
    font-size: 16px;
    margin-top: 10px;
    text-shadow: 0 1px 3px rgba(255,255,255,0.9);
}

/* === 关于我们 === */
.about-section {
    background: transparent;
}

.about-content {
    display: flex;
    gap: 50px;
    align-items: center;
}

.about-text {
    flex: 1;
}

.about-text h3 {
    font-size: 28px;
    color: #D9AB08;
    margin-bottom: 20px;
}

.about-text p {
    color: #111;
    font-size: 15px;
    line-height: 1.9;
    margin-bottom: 15px;
    text-indent: 2em;
}

.about-image {
    flex: 1;
    height: 350px;
    border-radius: 10px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* === 企业简介 === */
.profile-section {
    background: transparent;
}

.profile-card {
    max-width: 1000px;
    margin: 0 auto;
    background: rgba(255,255,255,0.75);
    border-radius: 12px;
    box-shadow: 0 3px 20px rgba(0,0,0,0.08);
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.profile-header {
    background: linear-gradient(135deg, #D9AB08, #c49a06);
    padding: 35px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.profile-logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

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

.profile-logo span {
    font-size: 24px;
    font-weight: bold;
    color: #fff;
    letter-spacing: 2px;
}

.profile-credit-code {
    text-align: right;
}

.profile-credit-code .code-label {
    display: block;
    font-size: 12px;
    color: rgba(255,255,255,0.8);
    margin-bottom: 5px;
}

.profile-credit-code .code-value {
    font-size: 16px;
    font-weight: bold;
    color: #fff;
    font-family: 'Courier New', monospace;
    letter-spacing: 1px;
}

.profile-info-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
    border-bottom: 1px solid #f0f0f0;
}

.info-item {
    padding: 22px 30px;
    border-right: 1px solid #f0f0f0;
    border-bottom: 1px solid #f0f0f0;
}

.info-item:nth-child(3n) {
    border-right: none;
}

.info-item:nth-last-child(-n+3) {
    border-bottom: none;
}

.info-label {
    font-size: 13px;
    color: #999;
    margin-bottom: 8px;
}

.info-value {
    font-size: 15px;
    color: #333;
    font-weight: 500;
    line-height: 1.6;
}

.profile-scope {
    padding: 25px 30px;
    border-bottom: 1px solid #f0f0f0;
}

.profile-scope h4 {
    font-size: 16px;
    color: #D9AB08;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.profile-scope h4::before {
    content: '';
    width: 4px;
    height: 18px;
    background: #D9AB08;
    border-radius: 2px;
}

.profile-scope p {
    color: #111;
    font-size: 14px;
    line-height: 1.9;
    text-indent: 2em;
}

.profile-history {
    padding: 25px 30px;
}

.profile-history h4 {
    font-size: 16px;
    color: #D9AB08;
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.profile-history h4::before {
    content: '';
    width: 4px;
    height: 18px;
    background: #D9AB08;
    border-radius: 2px;
}

.timeline {
    position: relative;
    padding-left: 30px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 5px;
    bottom: 5px;
    width: 2px;
    background: #e8e8e8;
}

.timeline-item {
    position: relative;
    margin-bottom: 25px;
    padding-left: 20px;
}

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

.timeline-dot {
    position: absolute;
    left: -26px;
    top: 6px;
    width: 14px;
    height: 14px;
    background: #D9AB08;
    border-radius: 50%;
    border: 3px solid #fff;
    box-shadow: 0 0 0 2px #D9AB08;
}

.timeline-date {
    font-size: 14px;
    color: #D9AB08;
    font-weight: bold;
    margin-bottom: 6px;
}

.timeline-content {
    color: #111;
    font-size: 14px;
    line-height: 1.8;
}

/* === 业务板块 === */
.business-section {
    background: transparent;
}

.business-tabs {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.business-tab {
    padding: 12px 30px;
    background: #fff;
    border: 2px solid #e0e0e0;
    border-radius: 30px;
    cursor: pointer;
    font-size: 15px;
    color: #666;
    transition: all 0.3s;
}

.business-tab:hover,
.business-tab.active {
    background: #D9AB08;
    border-color: #D9AB08;
    color: #fff;
}

.business-content {
    display: none;
}

.business-content.active {
    display: block;
}

.business-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}

.business-card {
    background: rgba(255,255,255,0.75);
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 3px 15px rgba(0,0,0,0.08);
    transition: all 0.3s;
    border-top: 3px solid transparent;
    backdrop-filter: blur(10px);
}

.business-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.12);
    border-top-color: #D9AB08;
}

.business-card .card-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #D9AB08, #f0d060);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin-bottom: 20px;
}

.business-card h4 {
    font-size: 18px;
    color: #333;
    margin-bottom: 12px;
}

.business-card p {
    color: #222;
    font-size: 14px;
    line-height: 1.8;
}

.business-card ul {
    margin-top: 10px;
}

.business-card ul li {
    color: #222;
    font-size: 14px;
    padding: 6px 0;
    padding-left: 18px;
    position: relative;
}

.business-card ul li::before {
    content: '◆';
    position: absolute;
    left: 0;
    color: #D9AB08;
    font-size: 10px;
}

/* === 投资规模 === */
.investment-section {
    background: transparent;
    color: #111;
}

.investment-section .section-header h2 {
    color: #111;
}

.investment-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.investment-card {
    background: rgba(255,255,255,0.75);
    border: 1px solid rgba(217, 171, 8, 0.3);
    border-radius: 12px;
    padding: 40px 30px;
    text-align: center;
    transition: all 0.3s;
    backdrop-filter: blur(10px);
}

.investment-card:hover {
    background: rgba(255,255,255,0.85);
    border-color: #D9AB08;
    transform: translateY(-5px);
}

.investment-card .icon {
    font-size: 50px;
    margin-bottom: 20px;
}

.investment-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #D9AB08;
    text-shadow: 0 1px 3px rgba(255,255,255,0.8);
}

.investment-card .amount {
    font-size: 36px;
    font-weight: bold;
    color: #b8960a;
    text-shadow: 0 1px 3px rgba(255,255,255,0.8);
    margin-bottom: 10px;
}

.investment-card p {
    color: #333;
    font-size: 14px;
}

/* === 资源分布 === */
.resources-section {
    background: transparent;
}

.resource-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.resource-card {
    background: rgba(255,255,255,0.75);
    border-radius: 12px;
    padding: 35px;
    border-left: 4px solid #D9AB08;
    transition: all 0.3s;
    backdrop-filter: blur(10px);
}

.resource-card:hover {
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.resource-card h3 {
    font-size: 22px;
    color: #333;
    margin-bottom: 18px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.resource-card h3 .region-icon {
    width: 35px;
    height: 35px;
    background: #D9AB08;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 16px;
}

.resource-card p {
    color: #111;
    font-size: 15px;
    line-height: 1.8;
    margin-bottom: 8px;
}

/* === 新闻动态 === */
.news-section {
    background: #f8f8f8;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}

.news-card {
    background: rgba(255,255,255,0.75);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 3px 15px rgba(0,0,0,0.08);
    transition: all 0.3s;
    backdrop-filter: blur(10px);
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.12);
}

.news-card .news-image {
    height: 200px;
    background: linear-gradient(135deg, #D9AB08, #f0d060);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 50px;
}

.news-card .news-body {
    padding: 25px;
}

.news-card .news-date {
    color: #D9AB08;
    font-size: 13px;
    margin-bottom: 10px;
}

.news-card h4 {
    font-size: 17px;
    color: #333;
    margin-bottom: 12px;
    line-height: 1.5;
}

.news-card p {
    color: #222;
    font-size: 14px;
    line-height: 1.7;
}

/* === 联系我们 === */
.contact-section {
    background: transparent;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-info h3 {
    font-size: 24px;
    color: #1a1a1a;
    margin-bottom: 30px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 25px;
}

.contact-item .icon {
    width: 45px;
    height: 45px;
    background: linear-gradient(135deg, #D9AB08, #f0d060);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 18px;
    flex-shrink: 0;
}

.contact-item .text strong {
    display: block;
    color: #1a1a1a;
    font-size: 15px;
    margin-bottom: 5px;
}

.contact-item .text p {
    color: #444;
    font-size: 14px;
}

.contact-form {
    background: rgba(255,255,255,0.85);
    border-radius: 12px;
    padding: 40px;
    backdrop-filter: blur(10px);
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid #e8e8e8;
    border-radius: 8px;
    font-size: 15px;
    transition: border-color 0.3s;
    font-family: inherit;
    background: #fff;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #D9AB08;
}

.form-group textarea {
    height: 120px;
    resize: vertical;
}

.submit-btn {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, #D9AB08, #c49a06);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.submit-btn:hover {
    background: linear-gradient(135deg, #c49a06, #a88505);
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(217, 171, 8, 0.4);
}

/* === 页脚 === */
.main-footer {
    background: rgba(26,26,26,0.85);
    color: #ccc;
    padding: 60px 0 0;
    backdrop-filter: blur(15px);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid #333;
}

.footer-col h4 {
    font-size: 18px;
    color: #D9AB08;
    margin-bottom: 20px;
}

.footer-col p {
    color: #bbb;
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: 10px;
}

.footer-col a {
    color: #999;
    font-size: 14px;
    line-height: 1.8;
    transition: color 0.3s;
}

.footer-col a:hover {
    color: #D9AB08;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links li a {
    color: #999;
    font-size: 14px;
    transition: color 0.3s;
}

.footer-links li a:hover {
    color: #D9AB08;
}

.footer-bottom {
    text-align: center;
    padding: 25px 0;
    color: #aaa;
    font-size: 13px;
}

.footer-bottom a {
    color: #bbb;
    transition: color 0.3s;
}

.footer-bottom a:hover {
    color: #D9AB08;
}

/* === 回到顶部按钮 === */
.back-to-top {
    position: fixed;
    bottom: 40px;
    right: 30px;
    width: 45px;
    height: 45px;
    background: #D9AB08;
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    z-index: 999;
    box-shadow: 0 3px 15px rgba(217, 171, 8, 0.4);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 20px rgba(217, 171, 8, 0.5);
}

/* === 响应式设计 === */
@media (max-width: 1024px) {
    .business-grid,
    .investment-grid,
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .top-bar {
        display: none;
    }
    
    .main-header {
        top: 0;
    }
    
    .header-inner {
        padding: 10px 0;
    }
    
    .main-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: #fff;
        box-shadow: 0 5px 20px rgba(0,0,0,0.1);
        padding: 15px 0;
    }
    
    .main-nav.open {
        display: block;
    }
    
    .main-nav ul {
        flex-direction: column;
        gap: 0;
    }
    
    .main-nav ul li a {
        padding: 12px 25px;
        border-radius: 0;
        border-bottom: 1px solid #f0f0f0;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .banner-section {
        height: 400px;
        margin-top: 65px;
    }
    
    .banner-slide .banner-content h2 {
        font-size: 28px;
        letter-spacing: 2px;
    }
    
    .banner-slide .banner-content p {
        font-size: 16px;
    }
    
    .banner-arrow {
        width: 40px;
        height: 40px;
        font-size: 18px;
    }
    
    .section {
        padding: 50px 0;
    }
    
    .section-header h2 {
        font-size: 28px;
    }
    
    .about-content {
        flex-direction: column;
    }
    
    .about-image {
        height: 250px;
    }
    
    .profile-header {
        flex-direction: column;
        text-align: center;
    }
    
    .profile-credit-code {
        text-align: center;
    }
    
    .profile-info-grid {
        grid-template-columns: 1fr;
    }
    
    .info-item {
        border-right: none;
        border-bottom: 1px solid #f0f0f0;
    }
    
    .info-item:last-child {
        border-bottom: none;
    }
    
    .business-grid,
    .investment-grid,
    .news-grid,
    .resource-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .business-tabs {
        gap: 8px;
    }
    
    .business-tab {
        padding: 10px 20px;
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    .banner-section {
        height: 350px;
    }
    
    .banner-slide .banner-content h2 {
        font-size: 22px;
    }
    
    .banner-slide .banner-content p {
        font-size: 14px;
        padding: 0 20px;
    }
    
    .logo-text {
        font-size: 18px;
    }
    
    .logo img {
        height: 40px;
    }
}

/* === 动画效果 === */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   矿产工业用途与商业价值 板块样式
   ============================================ */

.mineral-section {
    background: transparent;
}

/* 矿产标签导航 */
.mineral-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    margin-bottom: 30px;
    padding: 15px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.mineral-tab {
    padding: 8px 18px;
    background: rgba(240,240,240,0.8);
    color: #333;
    border-radius: 20px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.mineral-tab:hover {
    background: #e8e8e8;
    color: #333;
}

.mineral-tab.active {
    background: #D9AB08;
    color: #fff;
    border-color: #D9AB08;
}

/* 矿产内容区域 */
.mineral-content {
    display: none;
    animation: fadeIn 0.4s ease;
}

.mineral-content.active {
    display: block;
}

.mineral-card {
    background: rgba(255,255,255,0.75);
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    backdrop-filter: blur(10px);
}

.mineral-card h3 {
    font-size: 22px;
    color: #1a1a1a;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 3px solid #D9AB08;
}

.mineral-card h4 {
    font-size: 16px;
    color: #333;
    margin: 20px 0 12px;
    padding-left: 12px;
    border-left: 4px solid #D9AB08;
}

/* 矿产基本信息网格 */
.mineral-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 12px;
    margin-bottom: 15px;
}

.mineral-info-item {
    background: rgba(249,249,249,0.8);
    padding: 12px 15px;
    border-radius: 8px;
    border-left: 3px solid #D9AB08;
}

.mineral-info-item strong {
    display: block;
    color: #D9AB08;
    font-size: 12px;
    text-transform: uppercase;
    margin-bottom: 4px;
}

.mineral-info-item span {
    color: #222;
    font-size: 14px;
}

/* 工业用途列表 */
.mineral-use-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.mineral-use-list li {
    padding: 10px 0 10px 20px;
    position: relative;
    border-bottom: 1px dashed #eee;
    color: #222;
    font-size: 14px;
    line-height: 1.6;
}

.mineral-use-list li:last-child {
    border-bottom: none;
}

.mineral-use-list li:before {
    content: "▸";
    position: absolute;
    left: 0;
    color: #D9AB08;
    font-weight: bold;
}

.mineral-use-list li b {
    color: #333;
}

/* 价格表格 */
.mineral-price-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 12px;
    font-size: 14px;
}

.mineral-price-table th {
    background: rgba(26,26,26,0.85);
    color: #fff;
    padding: 12px 15px;
    text-align: left;
    font-weight: 500;
}

.mineral-price-table td {
    padding: 10px 15px;
    border-bottom: 1px solid #eee;
    color: #222;
}

.mineral-price-table tr:hover {
    background: #fafafa;
}

.price-low {
    color: #38a169 !important;
    font-weight: 600;
}

.price-mid {
    color: #dd6b20 !important;
    font-weight: 600;
}

.price-high {
    color: #e53e3e !important;
    font-weight: 600;
}

/* 备注说明 */
.mineral-note {
    margin-top: 15px;
    padding: 12px 15px;
    background: rgba(249,249,249,0.8);
    border-left: 4px solid #D9AB08;
    border-radius: 0 8px 8px 0;
    color: #333;
    font-size: 14px;
    line-height: 1.6;
}

/* 星级评分 */
.star-rating {
    color: #D9AB08;
    font-size: 16px;
    letter-spacing: 2px;
}

/* 标签徽章 */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

.badge-red {
    background: #fed7d7;
    color: #c53030;
}

.badge-yellow {
    background: #fefcbf;
    color: #b7791f;
}

.badge-green {
    background: #c6f6d5;
    color: #276749;
}

/* 洞察框 */
.insight-box {
    background: linear-gradient(135deg, rgba(217,171,8,0.08), rgba(217,171,8,0.03));
    border: 1px solid rgba(217,171,8,0.2);
    border-radius: 8px;
    padding: 15px 18px;
    margin: 10px 0;
}

.insight-box p {
    color: #222;
    font-size: 14px;
    line-height: 1.7;
}

.insight-box b {
    color: #1a1a1a;
}

/* 矿产板块响应式 */
@media (max-width: 768px) {
    .mineral-tabs {
        gap: 6px;
        padding: 10px;
    }
    .mineral-tab {
        padding: 6px 12px;
        font-size: 12px;
    }
    .mineral-card {
        padding: 20px 15px;
    }
    .mineral-card h3 {
        font-size: 18px;
    }
    .mineral-info-grid {
        grid-template-columns: 1fr;
    }
    .mineral-price-table {
        font-size: 12px;
    }
    .mineral-price-table th,
    .mineral-price-table td {
        padding: 8px 10px;
    }
}