/* ========================================
   星铂再生资源 - 企业官网样式表 v3.0
   Logo配色：深蓝#1e3a6b + 绿色#2d8c4a
   ======================================== */

/* CSS变量 - 根据Logo配色 */
:root {
    --primary-color: #1e3a6b;
    --primary-dark: #142850;
    --primary-light: #2d5a9e;
    --secondary-color: #2d8c4a;
    --secondary-light: #3da85c;
    --accent-color: #d4a84b;
    --accent-light: #e5c06a;
    --text-dark: #1f2937;
    --text-gray: #4b5563;
    --text-light: #9ca3af;
    --bg-light: #f5f7fa;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --success-color: #2d8c4a;
    --shadow: 0 2px 10px rgba(0,0,0,0.08);
    --shadow-hover: 0 8px 25px rgba(0,0,0,0.12);
    --transition: all 0.3s ease;
    --container-width: 1200px;
}

/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Microsoft YaHei", "PingFang SC", -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--bg-white);
}

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

ul, ol {
    list-style: none;
}

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

/* SVG图标通用样式 */
svg {
    width: 24px;
    height: 24px;
    vertical-align: middle;
    flex-shrink: 0;
}

.icon-sm { width: 18px; height: 18px; }
.icon-md { width: 24px; height: 24px; }
.icon-lg { width: 36px; height: 36px; }
.icon-xl { width: 48px; height: 48px; }

/* 通用容器 */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 30px;
    font-size: 15px;
    font-weight: 500;
    text-align: center;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    border-radius: 6px;
}

.btn svg {
    width: 18px;
    height: 18px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    color: #fff;
    box-shadow: 0 4px 15px rgba(30, 58, 107, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(30, 58, 107, 0.4);
}

.btn-outline {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255,255,255,0.6);
}

.btn-outline:hover {
    background: rgba(255,255,255,0.1);
    border-color: #fff;
}

.btn-block {
    width: 100%;
}

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

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

.section-title {
    font-size: 34px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

.section-subtitle {
    font-size: 16px;
    color: var(--text-gray);
    margin-top: 24px;
}

/* ========================================
   导航栏
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    box-shadow: var(--shadow);
    z-index: 1000;
    transition: var(--transition);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

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

.logo-img {
    height: 72px;
    width: auto;
}

.logo-text-wrap {
    display: flex;
    flex-direction: column;
}

.logo-text {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary-dark);
    line-height: 1.2;
}

.logo-sub {
    font-size: 11px;
    color: var(--text-light);
    line-height: 1.2;
    font-weight: 400;
}

.nav {
    display: flex;
    gap: 28px;
}

.nav-link {
    font-size: 15px;
    color: var(--text-dark);
    padding: 8px 0;
    position: relative;
    transition: var(--transition);
    font-weight: 500;
}

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

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

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

/* 移动端菜单按钮 */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: var(--transition);
}

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

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

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ========================================
   Banner区
   ======================================== */
.banner {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 50%, #1a4a7a 100%);
    overflow: hidden;
}

.banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(45, 140, 74, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.03) 0%, transparent 30%);
}

.banner-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, rgba(20, 40, 80, 0.5) 0%, rgba(20, 40, 80, 0.3) 100%);
}

.banner-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: #fff;
    padding: 0 20px;
}

.banner-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(45, 140, 74, 0.2);
    border: 1px solid rgba(45, 140, 74, 0.4);
    border-radius: 20px;
    font-size: 14px;
    color: var(--secondary-light);
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease;
}

.banner-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: 3px;
    animation: fadeInUp 0.8s ease 0.1s both;
}

.banner-subtitle {
    font-size: 18px;
    opacity: 0.95;
    margin-bottom: 40px;
    font-weight: 400;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.banner-btns {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.4s both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
   关于我们
   ======================================== */
.about {
    background: var(--bg-white);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text p {
    font-size: 16px;
    color: var(--text-gray);
    margin-bottom: 20px;
    line-height: 1.9;
}

.about-text strong {
    color: var(--primary-color);
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.stat-item {
    text-align: center;
    padding: 30px 15px;
    background: linear-gradient(135deg, var(--bg-light), var(--bg-white));
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: var(--transition);
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
    border-color: var(--primary-color);
}

.stat-num {
    font-size: 42px;
    font-weight: 700;
    color: var(--primary-color);
    display: inline;
}

.stat-unit {
    font-size: 20px;
    color: var(--secondary-color);
    font-weight: 600;
}

.stat-label {
    font-size: 14px;
    color: var(--text-gray);
    margin-top: 8px;
}

/* ========================================
   主营业务
   ======================================== */
.services {
    background: var(--bg-light);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.service-card {
    background: var(--bg-white);
    padding: 36px 24px;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid transparent;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-color);
}

.service-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.service-icon svg {
    stroke: #fff;
}

.service-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.service-desc {
    font-size: 14px;
    color: var(--text-gray);
    line-height: 1.7;
}

/* ========================================
   产品中心
   ======================================== */
.products {
    background: var(--bg-white);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.product-card {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    padding: 36px 24px;
    border-radius: 12px;
    text-align: center;
    color: #fff;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 80px;
    height: 80px;
    background: rgba(255,255,255,0.05);
    border-radius: 0 0 0 80px;
}

.product-card:hover {
    transform: scale(1.03);
}

.product-icon {
    width: 56px;
    height: 56px;
    background: rgba(255,255,255,0.15);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.product-icon svg {
    stroke: #fff;
}

.product-card h3 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 8px;
}

.product-card p {
    font-size: 13px;
    opacity: 0.9;
}

/* ========================================
   主营业务 - 图文详情
   ======================================== */
.service-detail {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
    max-width: 1100px;
    margin: 0 auto;
}

.service-image {
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-hover);
}

.service-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    display: block;
}

.service-info {
    padding: 20px 0;
}

.service-info .service-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 16px;
}

.service-info .service-desc {
    font-size: 16px;
    color: var(--text-gray);
    line-height: 1.8;
    margin-bottom: 24px;
}

.service-specs {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
}

.spec-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 12px 20px;
    background: var(--bg-light);
    border-radius: 8px;
    border-left: 3px solid var(--primary-color);
}

.spec-label {
    font-size: 12px;
    color: var(--text-gray);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.spec-value {
    font-size: 16px;
    font-weight: 700;
    color: var(--primary-color);
}

.service-note {
    font-size: 14px;
    color: var(--text-gray);
    line-height: 1.7;
    padding: 16px;
    background: rgba(212, 168, 75, 0.08);
    border-radius: 8px;
    border-left: 3px solid var(--accent-color);
}

/* ========================================
   产品中心 - 图文详情
   ======================================== */
.product-detail {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
    max-width: 1100px;
    margin: 0 auto;
}

.product-image {
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-hover);
}

.product-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    display: block;
}

.product-info {
    padding: 20px 0;
}

.product-info .product-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 16px;
}

.product-info .product-desc {
    font-size: 16px;
    color: var(--text-gray);
    line-height: 1.8;
    margin-bottom: 24px;
}

.product-info .product-specs {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.product-info .product-specs .spec-item {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding: 14px 20px;
}

.product-info .product-specs .spec-label {
    font-size: 14px;
}

.product-info .product-specs .spec-value {
    font-size: 14px;
    color: var(--text-dark);
}

/* ========================================
   环保公示 - 新闻列表样式
   ======================================== */
.env-news-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.env-news-item {
    display: flex;
    gap: 24px;
    padding: 24px;
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: var(--transition);
}

.env-news-item:hover {
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-color);
    transform: translateX(8px);
}

.news-date {
    flex-shrink: 0;
    width: 70px;
    text-align: center;
    padding: 12px 8px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 10px;
    color: #fff;
}

.date-day {
    display: block;
    font-size: 24px;
    font-weight: 700;
    line-height: 1;
}

.date-month {
    display: block;
    font-size: 11px;
    opacity: 0.9;
    margin-top: 4px;
}

.news-content {
    flex: 1;
}

.news-tag {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
    margin-bottom: 10px;
}

.news-tag.monitoring {
    background: rgba(30, 58, 107, 0.1);
    color: var(--primary-color);
}

.news-tag.permit {
    background: rgba(45, 140, 74, 0.1);
    color: var(--secondary-color);
}

.news-tag.report {
    background: rgba(212, 168, 75, 0.15);
    color: #b8942e;
}

.news-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
    line-height: 1.4;
}

.news-desc {
    font-size: 14px;
    color: var(--text-gray);
    line-height: 1.7;
    margin-bottom: 12px;
}

.news-link {
    font-size: 14px;
    color: var(--primary-color);
    font-weight: 500;
    transition: var(--transition);
}

.news-link:hover {
    color: var(--secondary-color);
}

/* 隐藏分类项 */
.env-news-item[data-category].hidden {
    display: none;
}

/* ========================================
   核心优势
   ======================================== */
.advantages {
    background: var(--bg-light);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.advantage-item {
    background: var(--bg-white);
    padding: 32px 28px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    border-left: 4px solid var(--primary-color);
}

.advantage-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    border-left-color: var(--secondary-color);
}

.advantage-num {
    font-size: 42px;
    font-weight: 700;
    color: var(--primary-color);
    opacity: 0.1;
    position: absolute;
    top: 10px;
    right: 16px;
}

.advantage-item h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.advantage-item p {
    font-size: 14px;
    color: var(--text-gray);
    line-height: 1.7;
}

/* ========================================
   合作流程
   ======================================== */
.process {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
    color: #fff;
}

.process .section-title {
    color: #fff;
}

.process .section-subtitle {
    color: rgba(255,255,255,0.9);
}

.process-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.process-step {
    text-align: center;
    width: 140px;
    background: rgba(255,255,255,0.1);
    padding: 28px 16px;
    border-radius: 12px;
    backdrop-filter: blur(10px);
}

.step-icon {
    width: 48px;
    height: 48px;
    background: rgba(45, 140, 74, 0.3);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 14px;
}

.step-icon svg {
    stroke: var(--secondary-light);
}

.step-num {
    width: 28px;
    height: 28px;
    line-height: 28px;
    background: var(--secondary-color);
    color: #fff;
    border-radius: 50%;
    margin: 0 auto 12px;
    font-weight: 700;
    font-size: 14px;
}

.process-step h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 4px;
}

.process-step p {
    font-size: 12px;
    opacity: 0.8;
}

.process-arrow {
    font-size: 20px;
    opacity: 0.4;
    color: #fff;
}

.process-arrow svg {
    stroke: #fff;
}

/* ========================================
   环保公示模块
   ======================================== */
.environment {
    background: var(--bg-white);
}

/* 标签切换 */
.env-tabs {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.env-tab {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-gray);
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.env-tab:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.env-tab.active {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #fff;
    border-color: transparent;
}

/* 内容区 */
.env-content {
    display: none;
}

.env-content.active {
    display: block;
    animation: fadeIn 0.4s ease;
}

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

/* 介绍区块 */
.env-intro {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 24px;
    background: linear-gradient(135deg, var(--bg-light), var(--bg-white));
    border: 1px solid var(--border-color);
    border-radius: 12px;
    margin-bottom: 32px;
}

.env-intro-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.env-intro-icon svg {
    stroke: #fff;
}

.env-intro-text h4 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 6px;
}

.env-intro-text p {
    font-size: 14px;
    color: var(--text-gray);
    line-height: 1.7;
}

/* 数据表格 */
.env-table-wrapper {
    overflow-x: auto;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

.env-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-white);
}

.env-table th,
.env-table td {
    padding: 16px 20px;
    text-align: left;
    font-size: 14px;
}

.env-table th {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: #fff;
    font-weight: 600;
    white-space: nowrap;
}

.env-table th:first-child {
    border-radius: 11px 0 0 0;
}

.env-table th:last-child {
    border-radius: 0 11px 0 0;
}

.env-table td {
    border-bottom: 1px solid var(--border-color);
    color: var(--text-dark);
}

.env-table tr:last-child td {
    border-bottom: none;
}

.env-table tr:hover td {
    background: var(--bg-light);
}

.status-pass {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(45, 140, 74, 0.1);
    color: var(--success-color);
    border-radius: 4px;
    font-size: 13px;
    font-weight: 500;
}

/* 危废卡片 */
.waste-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.waste-card {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: var(--transition);
}

.waste-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
}

.waste-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: #fff;
}

.waste-code {
    font-size: 15px;
    font-weight: 700;
    background: rgba(255,255,255,0.2);
    padding: 4px 12px;
    border-radius: 4px;
}

.waste-type {
    font-size: 14px;
}

.waste-info {
    padding: 20px;
}

.waste-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px dashed var(--border-color);
}

.waste-row:last-child {
    border-bottom: none;
}

.waste-row span:first-child {
    font-size: 13px;
    color: var(--text-light);
}

.waste-row span:last-child {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-dark);
}

.status-valid {
    color: var(--success-color) !important;
}

/* 排污许可 */
.permit-info {
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 8px 0;
    margin-bottom: 24px;
}

.permit-row {
    display: flex;
    padding: 14px 24px;
    border-bottom: 1px solid var(--border-color);
}

.permit-row:last-child {
    border-bottom: none;
}

.permit-label {
    width: 140px;
    font-size: 14px;
    color: var(--text-light);
    flex-shrink: 0;
}

.permit-value {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-dark);
}

.env-download {
    text-align: center;
}

.env-note {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 24px;
    padding: 16px 20px;
    background: rgba(30, 58, 107, 0.05);
    border: 1px solid rgba(30, 58, 107, 0.1);
    border-radius: 8px;
    font-size: 13px;
    color: var(--text-gray);
}

.env-note svg {
    stroke: var(--primary-color);
    flex-shrink: 0;
}

/* ========================================
   联系我们
   ======================================== */
.contact {
    background: var(--bg-white);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.info-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.info-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.info-icon svg {
    stroke: #fff;
}

.info-item h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 4px;
}

.info-item p {
    font-size: 14px;
    color: var(--text-gray);
}

.contact-form {
    background: var(--bg-light);
    padding: 40px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
}

.contact-form h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 24px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
}

.form-row input,
.contact-form textarea {
    width: 100%;
    padding: 14px 18px;
    font-size: 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-white);
    transition: var(--transition);
    font-family: inherit;
}

.form-row input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(30, 58, 107, 0.1);
}

.contact-form textarea {
    margin-bottom: 16px;
    resize: none;
}

/* ========================================
   底部
   ======================================== */
.footer {
    background: linear-gradient(135deg, var(--primary-dark), #0f2240);
    color: #fff;
    padding-top: 60px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 48px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-logo-img {
    height: 50px;
    width: auto;
    margin-bottom: 16px;
}

.footer-brand p {
    font-size: 14px;
    opacity: 0.8;
    line-height: 1.7;
}

.footer-links h4,
.footer-contact h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--secondary-light);
}

.footer-links a,
.footer-links span {
    display: block;
    font-size: 14px;
    color: rgba(255,255,255,0.7);
    margin-bottom: 12px;
    transition: var(--transition);
}

.footer-links a:hover {
    color: #fff;
    padding-left: 6px;
}

.footer-contact p {
    font-size: 14px;
    color: rgba(255,255,255,0.7);
    margin-bottom: 10px;
}

.footer-bottom {
    text-align: center;
    padding: 20px 0;
}

.footer-bottom p {
    font-size: 13px;
    color: rgba(255,255,255,0.5);
}

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 1024px) {
    .services-grid,
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .waste-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-content {
        gap: 40px;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }
    
    .nav {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-white);
        flex-direction: column;
        padding: 20px;
        gap: 0;
        box-shadow: var(--shadow);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }
    
    .nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-link {
        padding: 14px 0;
        border-bottom: 1px solid var(--border-color);
    }
    
    .logo-sub {
        display: none;
    }
    
    .banner-title {
        font-size: 34px;
    }
    
    .banner-subtitle {
        font-size: 16px;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: 12px;
    }
    
    .stat-num {
        font-size: 32px;
    }
    
    .services-grid,
    .products-grid,
    .advantages-grid,
    .waste-grid {
        grid-template-columns: 1fr;
    }
    
    .service-detail,
    .product-detail {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .service-image img,
    .product-image img {
        height: 280px;
    }
    
    .service-specs {
        flex-wrap: wrap;
    }
    
    .process-steps {
        flex-direction: column;
        gap: 12px;
    }
    
    .process-arrow {
        transform: rotate(90deg);
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
        text-align: center;
    }
    
    .footer-logo-img {
        margin: 0 auto 16px;
        display: block;
    }
    
    .env-tabs {
        gap: 6px;
    }
    
    .env-tab {
        padding: 10px 20px;
        font-size: 14px;
    }
    
    .env-table th,
    .env-table td {
        padding: 12px 14px;
        font-size: 13px;
    }
    
    .permit-label {
        width: 100px;
    }
}

@media (max-width: 480px) {
    .banner-title {
        font-size: 28px;
        letter-spacing: 2px;
    }
    
    .banner-subtitle {
        font-size: 14px;
    }
    
    .banner-btns {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 200px;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .contact-form {
        padding: 24px;
    }
    
    .env-intro {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
}

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

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