/* ========== 基础重置与变量 ========== */
:root {
    --green-900: #1b5e20;
    --green-800: #2e7d32;
    --green-700: #388e3c;
    --green-600: #43a047;
    --green-500: #4caf50;
    --green-400: #66bb6a;
    --green-100: #c8e6c9;
    --green-50: #e8f5e9;
    --gray-900: #212121;
    --gray-700: #616161;
    --gray-500: #9e9e9e;
    --gray-300: #e0e0e0;
    --gray-100: #f5f5f5;
    --white: #ffffff;
    --shadow: 0 2px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    --radius: 8px;
    --radius-lg: 16px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 70px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    color: var(--gray-900);
    line-height: 1.8;
    background: var(--white);
    -webkit-font-smoothing: antialiased;
}

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

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

ul { list-style: none; }

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

/* ========== 顶部栏 ========== */
.top-bar {
    background: var(--green-900);
    color: var(--white);
    font-size: 13px;
    padding: 6px 0;
}

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

.top-bar-phone {
    color: var(--green-100);
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
}

.top-bar-phone strong {
    color: #fff;
    font-size: 16px;
    letter-spacing: 1px;
}

.top-bar-phone:hover {
    color: var(--green-400);
}

/* ========== 导航栏 ========== */
.navbar {
    background: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

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

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.brand-logo-img {
    max-height: 52px;
    width: auto;
    max-width: 220px;
    object-fit: contain;
    display: block;
}

.brand-text {
    display: none;
}

.navbar-brand.brand-no-logo .brand-text {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand-logo {
    font-size: 28px;
    font-weight: 900;
    color: var(--green-800);
    letter-spacing: 4px;
}

.brand-logo-fallback {
    display: inline;
}

.brand-sub {
    font-size: 12px;
    color: var(--gray-700);
}

.navbar-menu {
    display: flex;
    gap: 4px;
}

.navbar-menu a {
    padding: 8px 16px;
    border-radius: var(--radius);
    font-size: 15px;
    color: var(--gray-700);
    font-weight: 500;
    transition: var(--transition);
}

.navbar-menu a:hover,
.navbar-menu a.active {
    color: var(--green-800);
    background: var(--green-50);
}

.navbar-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.navbar-toggle span {
    width: 24px;
    height: 2px;
    background: var(--gray-900);
    transition: var(--transition);
    border-radius: 2px;
}

/* ========== 横幅 Hero ========== */
.hero {
    position: relative;
    min-height: 520px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: url('../images/banner1.jpg') center center / cover no-repeat;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(27,94,32,0.85) 0%, rgba(56,142,60,0.75) 50%, rgba(67,160,71,0.7) 100%);
}

.hero-content {
    position: relative;
    text-align: center;
    color: var(--white);
    padding: 60px 20px;
}

.hero-title {
    font-size: 42px;
    font-weight: 900;
    letter-spacing: 6px;
    margin-bottom: 12px;
    text-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.hero-subtitle {
    font-size: 18px;
    letter-spacing: 8px;
    opacity: 0.8;
    margin-bottom: 20px;
}

.hero-desc {
    font-size: 16px;
    opacity: 0.9;
    margin-bottom: 36px;
    line-height: 2;
}

.hero-phone-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--white);
    color: var(--green-800);
    padding: 16px 40px;
    border-radius: 50px;
    font-size: 20px;
    font-weight: 700;
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
    transition: var(--transition);
    letter-spacing: 2px;
}

.hero-phone-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.3);
    background: var(--green-50);
}

/* ========== 通用板块 ========== */
.section {
    padding: 80px 0;
}

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

.section-title {
    font-size: 32px;
    font-weight: 800;
    color: var(--gray-900);
    letter-spacing: 4px;
}

.section-divider {
    width: 60px;
    height: 4px;
    background: var(--green-500);
    margin: 16px auto;
    border-radius: 2px;
}

.section-subtitle {
    font-size: 14px;
    color: var(--gray-500);
    letter-spacing: 4px;
    text-transform: uppercase;
}

.subsection-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--green-800);
    margin-bottom: 24px;
    padding-left: 14px;
    border-left: 4px solid var(--green-500);
}

/* ========== 企业介绍 ========== */
.section-about {
    background: var(--white);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 40px;
    align-items: start;
}

.about-images {
    display: block;
}

.about-images .img-placeholder {
    aspect-ratio: 16/10;
}

.about-text p {
    margin-bottom: 16px;
    text-indent: 2em;
    color: var(--gray-700);
    font-size: 15px;
    line-height: 2;
}

/* ========== 图片占位符 ========== */
.img-placeholder {
    background: var(--gray-100);
    border-radius: var(--radius);
    overflow: hidden;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px dashed var(--gray-300);
    min-height: 180px;
    transition: var(--transition);
}

.img-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: absolute;
    inset: 0;
}

.img-placeholder::before {
    content: attr(data-label);
    color: var(--gray-500);
    font-size: 13px;
    text-align: center;
    padding: 10px;
    z-index: 0;
}

.img-placeholder.placeholder-show {
    border: 2px dashed var(--green-400);
    background: var(--green-50);
}

.img-placeholder.placeholder-show::before {
    color: var(--green-600);
}

.img-placeholder:hover {
    border-color: var(--green-400);
    box-shadow: var(--shadow);
}

/* ========== 企业荣誉 ========== */
.section-honors {
    background: var(--gray-100);
}

.honors-carousel {
    position: relative;
    overflow: hidden;
    padding: 20px 0;
}

.honors-track {
    display: flex;
    gap: 30px;
    will-change: transform;
}

.honor-slide {
    flex-shrink: 0;
    width: auto;
    text-align: center;
}

.honor-slide .img-placeholder {
    min-height: 0;
    border-radius: var(--radius);
    aspect-ratio: auto;
    height: 500px;
    width: auto;
    display: inline-flex;
    border: none;
    background: transparent;
}

.honor-slide .img-placeholder::before {
    display: none;
}

.honor-slide .img-placeholder img {
    position: static;
    width: auto;
    max-width: none;
    height: 500px;
    object-fit: contain;
}

.honor-label {
    margin-top: 10px;
    font-size: 14px;
    color: var(--gray-700);
    font-weight: 500;
}

/* ========== 产品中心 ========== */
.section-products {
    background: var(--gray-100);
}

.product-nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    margin-bottom: 40px;
}

.product-nav-item {
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-700);
    background: var(--white);
    border: 1px solid var(--gray-300);
    transition: var(--transition);
    white-space: nowrap;
}

.product-nav-item:hover,
.product-nav-item.active {
    background: var(--green-800);
    color: var(--white);
    border-color: var(--green-800);
}

.product-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
    margin-bottom: 32px;
    scroll-margin-top: 80px;
}

.product-card-title {
    background: linear-gradient(135deg, var(--green-800), var(--green-600));
    color: var(--white);
    padding: 20px 32px;
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 2px;
}

.product-card-body {
    padding: 32px;
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.product-images {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* 主图区域 */
.product-featured {
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--gray-100);
}

.product-featured .img-placeholder {
    aspect-ratio: 16/10;
    border: none;
    min-height: 0;
    border-radius: var(--radius);
}

.product-featured .img-placeholder img {
    cursor: pointer;
}

/* 缩略图条 */
.product-thumbs {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 4px;
}

.product-thumbs::-webkit-scrollbar {
    height: 4px;
}

.product-thumbs::-webkit-scrollbar-thumb {
    background: var(--green-300);
    border-radius: 2px;
}

.product-thumbs .img-placeholder {
    flex-shrink: 0;
    width: 100px;
    height: 75px;
    aspect-ratio: auto;
    min-height: 0;
    cursor: pointer;
    border-radius: 6px;
    opacity: 0.6;
    transition: opacity 0.2s ease, border-color 0.2s ease;
}

.product-thumbs .img-placeholder:hover,
.product-thumbs .img-placeholder.thumb-active {
    opacity: 1;
    border-color: var(--green-500);
}

.product-thumbs .img-placeholder.thumb-active {
    border: 2px solid var(--green-600);
    box-shadow: 0 0 0 2px var(--green-100);
}

/* 没有缩略图时隐藏 */
.product-thumbs:empty {
    display: none;
}

.product-info p {
    margin-bottom: 14px;
    color: var(--gray-700);
    font-size: 15px;
    line-height: 2;
    text-indent: 2em;
}

.product-features {
    margin: 16px 0;
    padding-left: 0;
}

.product-features li {
    padding: 6px 0 6px 24px;
    position: relative;
    color: var(--gray-700);
    font-size: 14px;
    line-height: 1.8;
}

.product-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 14px;
    width: 8px;
    height: 8px;
    background: var(--green-500);
    border-radius: 50%;
}

/* ========== 工程业绩 ========== */
.section-performance {
    background: var(--white);
}

.performance-gallery {
    margin-bottom: 50px;
}

.gallery-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.gallery-item {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    cursor: pointer;
}

.gallery-item .img-placeholder {
    aspect-ratio: 16/10;
    border: none;
    min-height: 200px;
}

.gallery-item-lg .img-placeholder {
    aspect-ratio: 16/9;
}

.gallery-label {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.7));
    color: var(--white);
    padding: 30px 16px 12px;
    font-size: 14px;
    font-weight: 500;
}

.gallery-item:hover .gallery-label {
    background: linear-gradient(transparent, rgba(27,94,32,0.85));
}

/* 业绩表 */
.performance-table-wrap {
    margin-top: 50px;
}

.table-scroll {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.performance-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
    min-width: 700px;
}

.performance-table thead {
    background: linear-gradient(135deg, var(--green-800), var(--green-600));
}

.performance-table th {
    padding: 14px 18px;
    color: var(--white);
    font-weight: 600;
    text-align: left;
    white-space: nowrap;
}

.performance-table td {
    padding: 12px 18px;
    border-bottom: 1px solid var(--gray-300);
    color: var(--gray-700);
}

.performance-table tbody tr:hover {
    background: var(--green-50);
}

.performance-table tbody tr:nth-child(even) {
    background: var(--gray-100);
}

.performance-table tbody tr:nth-child(even):hover {
    background: var(--green-50);
}

/* ========== 售后服务 ========== */
.section-service {
    background: var(--green-50);
}

.service-intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 40px;
    font-size: 16px;
    color: var(--gray-700);
    line-height: 2;
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.service-item {
    background: var(--white);
    padding: 32px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.service-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.service-icon {
    color: var(--green-600);
    margin-bottom: 16px;
}

.service-item h4 {
    font-size: 18px;
    color: var(--green-800);
    margin-bottom: 12px;
    font-weight: 700;
}

.service-item p {
    color: var(--gray-700);
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: 6px;
}

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

.contact-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    max-width: 900px;
    margin: 0 auto;
}

.business-card {
    background: linear-gradient(135deg, var(--green-800), var(--green-600));
    color: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.business-card-header {
    padding: 28px 28px 16px;
    border-bottom: 1px solid rgba(255,255,255,0.15);
}

.business-card-company {
    display: block;
    font-size: 32px;
    font-weight: 900;
    letter-spacing: 6px;
}

.business-card-fullname {
    display: block;
    font-size: 13px;
    opacity: 0.85;
    margin-top: 4px;
}

.business-card-body {
    padding: 24px 28px 28px;
}

.business-card-name {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 4px;
}

.business-card-title-sub {
    font-size: 13px;
    opacity: 0.75;
    margin-bottom: 16px;
}

.business-card-item {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
    font-size: 14px;
    opacity: 0.9;
}

.business-card-item a {
    color: var(--white);
}

.business-card-item a:hover {
    text-decoration: underline;
}

.contact-cta {
    background: var(--gray-100);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    text-align: center;
}

.cta-phone {
    color: var(--green-800);
}

.cta-phone svg {
    opacity: 0.3;
}

.cta-phone-label {
    font-size: 16px;
    color: var(--gray-700);
    margin-top: 12px;
}

.cta-phone-number {
    display: block;
    font-size: 32px;
    font-weight: 900;
    color: var(--green-800);
    margin: 8px 0;
    letter-spacing: 2px;
}

.cta-phone-hint {
    font-size: 12px;
    color: var(--gray-500);
}

.cta-qrcode {
    display: block;
    max-width: 180px;
    width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 0 auto;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

/* ========== 页脚 ========== */
.footer {
    background: var(--green-900);
    color: var(--white);
}

.footer-inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    padding: 50px 0 30px;
}

.footer-logo {
    font-size: 28px;
    font-weight: 900;
    letter-spacing: 4px;
    margin-bottom: 8px;
}

.footer-logo-fallback {
    display: none;
}

.footer-logo-img {
    max-height: 52px;
    width: auto;
    max-width: 220px;
    object-fit: contain;
    display: block;
    margin-bottom: 8px;
}

/* 页脚有logo图片时，隐藏重复的公司名文字 */
.footer-logo-img:not([style*="display: none"]) ~ .footer-company,
.footer-logo-img:not([style*="display: none"]) ~ .footer-en {
    display: block;
}

.footer-brand.brand-no-logo .footer-logo-fallback {
    display: block;
}

.footer-company {
    font-size: 14px;
    opacity: 0.8;
    margin-bottom: 4px;
}

.footer-en {
    font-size: 12px;
    opacity: 0.5;
    letter-spacing: 4px;
}

.footer-links h4,
.footer-contact h4 {
    font-size: 16px;
    margin-bottom: 16px;
    font-weight: 600;
}

.footer-links a {
    display: block;
    padding: 4px 0;
    opacity: 0.8;
    font-size: 14px;
}

.footer-links a:hover {
    opacity: 1;
    color: var(--green-400);
}

.footer-contact p {
    font-size: 14px;
    opacity: 0.8;
    margin-bottom: 6px;
}

.footer-contact a {
    color: var(--green-400);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 16px 0;
    text-align: center;
}

.footer-bottom p {
    font-size: 13px;
    opacity: 0.6;
}

/* ========== 返回顶部 ========== */
.back-to-top {
    position: fixed;
    right: 24px;
    bottom: 90px;
    width: 44px;
    height: 44px;
    background: var(--green-800);
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow);
    display: none;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    z-index: 999;
}

.back-to-top:hover {
    background: var(--green-600);
    transform: translateY(-2px);
}

.back-to-top.show {
    display: flex;
}

/* ========== 浮动电话按钮 ========== */
.floating-phone {
    position: fixed;
    right: 24px;
    bottom: 28px;
    width: 56px;
    height: 56px;
    background: var(--green-800);
    color: var(--white);
    border-radius: 50%;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(27,94,32,0.4);
    z-index: 999;
    transition: var(--transition);
    animation: pulse 2s infinite;
}

.floating-phone:hover {
    background: var(--green-600);
    transform: scale(1.1);
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(76,175,80,0.5); }
    70% { box-shadow: 0 0 0 14px rgba(76,175,80,0); }
    100% { box-shadow: 0 0 0 0 rgba(76,175,80,0); }
}

/* ========== 灯箱 Lightbox ========== */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: none;
    align-items: center;
    justify-content: center;
}

.lightbox.open {
    display: flex;
}

.lightbox-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.92);
    backdrop-filter: blur(4px);
}

.lightbox-content {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-img-wrap {
    position: relative;
    max-width: 90vw;
    max-height: 85vh;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1;
}

.lightbox-img {
    max-width: 90vw;
    max-height: 85vh;
    object-fit: contain;
    border-radius: 4px;
    box-shadow: 0 4px 30px rgba(0,0,0,0.4);
    user-select: none;
    -webkit-user-drag: none;
}

.lightbox-close {
    position: absolute;
    top: 16px;
    right: 20px;
    z-index: 10;
    background: none;
    border: none;
    color: #fff;
    font-size: 40px;
    cursor: pointer;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition);
    line-height: 1;
}

.lightbox-close:hover {
    background: rgba(255,255,255,0.15);
}

.lightbox-prev,
.lightbox-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;
    background: rgba(255,255,255,0.1);
    border: none;
    color: #fff;
    cursor: pointer;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition);
}

.lightbox-prev { left: 20px; }
.lightbox-next { right: 20px; }

.lightbox-prev:hover,
.lightbox-next:hover {
    background: rgba(255,255,255,0.25);
}

.lightbox-counter {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    color: rgba(255,255,255,0.7);
    font-size: 14px;
    z-index: 10;
    background: rgba(0,0,0,0.4);
    padding: 4px 16px;
    border-radius: 20px;
}

/* 灯箱手机端适配 */
@media (max-width: 768px) {
    .lightbox-prev,
    .lightbox-next {
        width: 44px;
        height: 44px;
    }

    .lightbox-prev { left: 10px; }
    .lightbox-next { right: 10px; }

    .lightbox-close {
        top: 10px;
        right: 10px;
        font-size: 32px;
        width: 40px;
        height: 40px;
    }

    .lightbox-img {
        max-width: 95vw;
        max-height: 80vh;
    }
}

/* ========== 响应式 ========== */

/* 平板 */
@media (max-width: 1024px) {
    .about-content {
        grid-template-columns: 1fr;
    }

    .about-images .img-placeholder {
        aspect-ratio: 16/9;
    }

    .product-card-body {
        padding: 24px;
        gap: 24px;
    }

    .product-thumbs .img-placeholder {
        width: 90px;
        height: 68px;
    }

    .gallery-grid {
        grid-template-columns: 1fr 1fr;
    }

    .service-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

/* 手机 */
@media (max-width: 768px) {
    .top-bar-welcome { display: none; }

    .top-bar-inner {
        justify-content: center;
    }

    .top-bar-phone {
        font-size: 15px;
    }

    .navbar-inner { height: 60px; }

    .brand-sub { display: none; }

    .navbar-toggle { display: flex; }

    .navbar-menu {
        display: none;
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 16px 20px;
        box-shadow: var(--shadow-lg);
        gap: 4px;
    }

    .navbar-menu.open { display: flex; }

    .navbar-menu a {
        padding: 12px 16px;
        font-size: 16px;
    }

    .hero { min-height: 380px; }

    .hero-title {
        font-size: 24px;
        letter-spacing: 3px;
    }

    .hero-subtitle {
        font-size: 14px;
        letter-spacing: 4px;
    }

    .hero-desc { font-size: 14px; }

    .hero-phone-btn {
        padding: 12px 28px;
        font-size: 16px;
    }

    .section { padding: 50px 0; }

    .section-title {
        font-size: 24px;
        letter-spacing: 2px;
    }

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

    .about-images .img-placeholder {
        aspect-ratio: 16/9;
    }

    .about-text p { font-size: 14px; }

    .product-nav {
        flex-wrap: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        justify-content: flex-start;
        padding: 0 4px 12px;
        gap: 6px;
    }

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

    .product-nav-item {
        font-size: 13px;
        padding: 6px 14px;
        flex-shrink: 0;
    }

    .product-card-body {
        padding: 20px;
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .product-images {
        grid-template-columns: 1fr 1fr;
    }

    .product-images .img-placeholder:first-child {
        grid-column: 1 / -1;
    }

    .product-info p { font-size: 14px; text-indent: 0; }

    .gallery-grid {
        grid-template-columns: 1fr;
    }

    .service-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .service-item { padding: 24px; }

    .honor-slide .img-placeholder,
    .honor-slide .img-placeholder img {
        height: 360px;
    }

    .contact-cards {
        grid-template-columns: 1fr;
    }

    .cta-phone-number { font-size: 24px; }

    .footer-inner {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .floating-phone { display: flex; }

    .back-to-top {
        bottom: 94px;
        right: 16px;
    }

    .performance-table { font-size: 13px; }

    .performance-table th,
    .performance-table td {
        padding: 10px 12px;
    }
}

/* 小手机 */
@media (max-width: 480px) {
    .hero-title {
        font-size: 20px;
    }

    .hero-phone-btn {
        padding: 10px 20px;
        font-size: 14px;
    }

    .product-card-title {
        font-size: 18px;
        padding: 16px 20px;
    }

    .business-card-company {
        font-size: 24px;
    }

    .honor-slide .img-placeholder,
    .honor-slide .img-placeholder img {
        height: 280px;
    }
}