/* ===== 全局样式 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: #1a1a24;
    --bg-card-hover: #22222e;
    --gold-primary: #c9a962;
    --gold-light: #e8d5a3;
    --gold-dark: #8b7355;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b8;
    --text-muted: #6b6b78;
    --border-color: #2a2a38;
    --border-gold: rgba(201, 169, 98, 0.3);
    --shadow-gold: 0 0 30px rgba(201, 169, 98, 0.1);
    --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.3);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== 导航栏 ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.header.scrolled {
    background: rgba(10, 10, 15, 0.95);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

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

.logo img {
    height: 40px;
    width: auto;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--gold-primary);
    letter-spacing: 2px;
}

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

.nav-item {
    position: relative;
    font-size: 15px;
    color: var(--text-secondary);
    transition: color 0.3s ease;
    cursor: pointer;
}

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

.nav-item::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gold-primary);
    transition: width 0.3s ease;
}

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

.nav-right {
    display: flex;
    align-items: center;
    gap: 24px;
}

.nav-phone {
    text-align: right;
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.nav-phone .phone-number {
    color: var(--gold-primary);
    font-weight: 600;
    font-size: 15px;
}

.btn-primary {
    padding: 10px 24px;
    background: linear-gradient(135deg, var(--gold-primary), var(--gold-dark));
    color: var(--bg-primary);
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(201, 169, 98, 0.4);
}

.btn-outline {
    padding: 10px 24px;
    background: transparent;
    color: var(--gold-primary);
    border: 1px solid var(--gold-primary);
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-outline:hover {
    background: var(--gold-primary);
    color: var(--bg-primary);
}

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

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--gold-primary);
    transition: all 0.3s ease;
}

/* ===== Hero Banner ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 72px;
    overflow: hidden;
    background: linear-gradient(135deg, #0a0a0f 0%, #12121a 50%, #0a0a0f 100%);
}

.hero-content {
    position: absolute;
    z-index: 2;
    max-width: 620px;
    left: 10%;
    top: 50%;
    transform: translateY(-50%);
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(201, 169, 98, 0.1);
    border: 1px solid var(--border-gold);
    border-radius: 50px;
    color: var(--gold-primary);
    font-size: 14px;
    margin-bottom: 24px;
}

.hero-title {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    background: linear-gradient(135deg, #ffffff 0%, var(--gold-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 60px;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    max-width: 450px;
}

.stat-item {
    text-align: left;
}

.stat-number {
    font-size: 36px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--gold-primary) 0%, var(--gold-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 6px;
    line-height: 1;
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
}

.hero-visual {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 50%;
    height: 60%;
    z-index: 1;
}

/* 电磁波效果 */
.wave-container {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: flex-end;
}

.wave {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    border: 2px solid var(--gold-primary);
    border-radius: 4px;
    opacity: 0;
    animation: waveExpand 4.5s ease-out infinite;
}

.wave:nth-child(1) {
    animation-delay: 0s;
    height: 70%;
}

.wave:nth-child(2) {
    animation-delay: 0.9s;
    height: 62%;
}

.wave:nth-child(3) {
    animation-delay: 1.8s;
    height: 54%;
}

.wave:nth-child(4) {
    animation-delay: 2.7s;
    height: 46%;
}

.wave:nth-child(5) {
    animation-delay: 3.6s;
    height: 38%;
}

@keyframes waveExpand {
    0% {
        width: 0;
        opacity: 0.8;
    }
    100% {
        width: 85%;
        opacity: 0;
    }
}

.wave-glow {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 240px;
    height: 100%;
    background: linear-gradient(to left, rgba(201, 169, 98, 0.3), transparent);
    filter: blur(40px);
}

.wave-glow::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 120px;
    height: 60%;
    background: linear-gradient(to left, rgba(201, 169, 98, 0.5), transparent);
    filter: blur(20px);
}

/* 角标装饰 */
.corner-mark {
    position: absolute;
    width: 30px;
    height: 30px;
    border: 2px solid var(--gold-primary);
}

.corner-mark.top-right {
    top: 10%;
    right: 5%;
    border-left: none;
    border-bottom: none;
}

.corner-mark.bottom-right {
    bottom: 10%;
    right: 5%;
    border-left: none;
    border-top: none;
}

/* ===== 通用Section ===== */
.section {
    padding: 100px 0;
}

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

.section-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.section-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.section-divider {
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--gold-primary), var(--gold-light));
    margin: 20px auto 0;
    border-radius: 2px;
}

/* ===== 产品分类 ===== */
.categories {
    background: var(--bg-secondary);
}

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

.category-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 32px 24px;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

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

.category-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, rgba(201, 169, 98, 0.2), rgba(201, 169, 98, 0.05));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gold-primary);
    font-size: 28px;
}

.category-name {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.category-desc {
    font-size: 14px;
    color: var(--text-muted);
}

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

.advantage-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.advantage-item {
    text-align: center;
    padding: 40px 24px;
    background: var(--bg-card);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.advantage-item:hover {
    border-color: var(--border-gold);
    transform: translateY(-4px);
}

.advantage-number {
    font-size: 48px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--gold-primary), var(--gold-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
}

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

.advantage-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===== 精选产品 ===== */
.featured-products {
    background: var(--bg-secondary);
}

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

.product-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s ease;
    cursor: pointer;
}

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

.product-image {
    position: relative;
    width: 100%;
    height: 220px;
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.product-image img {
    max-width: 80%;
    max-height: 80%;
    object-fit: contain;
    transition: transform 0.3s ease;
}

.product-card:hover .product-image img {
    transform: scale(1.05);
}

.product-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    padding: 4px 12px;
    background: linear-gradient(135deg, var(--gold-primary), var(--gold-dark));
    color: var(--bg-primary);
    font-size: 12px;
    font-weight: 600;
    border-radius: 4px;
}

.product-info {
    padding: 20px;
}

.product-name {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-category {
    font-size: 13px;
    color: var(--gold-primary);
    margin-bottom: 12px;
}

.product-desc {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.view-all {
    text-align: center;
    margin-top: 48px;
}

/* ===== 公司简介 ===== */
.about-section {
    background: var(--bg-primary);
}

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

.about-text h3 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.about-text p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 32px;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background: var(--bg-card);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.stat-number {
    font-size: 32px;
    font-weight: 800;
    color: var(--gold-primary);
    margin-bottom: 8px;
}

.stat-label {
    font-size: 13px;
    color: var(--text-muted);
}

.about-image {
    position: relative;
    height: 400px;
    background: var(--bg-card);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.about-image::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(201, 169, 98, 0.1) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* ===== 资质认证 ===== */
.certifications {
    background: var(--bg-secondary);
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.cert-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 40px 24px;
    text-align: center;
    transition: all 0.3s ease;
}

.cert-card:hover {
    border-color: var(--gold-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-gold);
}

.cert-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, rgba(201, 169, 98, 0.2), rgba(201, 169, 98, 0.05));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gold-primary);
    font-size: 36px;
}

.cert-name {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.cert-issuer {
    font-size: 13px;
    color: var(--text-muted);
}

/* ===== 页脚 ===== */
.footer {
    background: #08080c;
    border-top: 1px solid var(--border-color);
    padding: 60px 0 0;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 48px;
}

.footer-brand .logo {
    margin-bottom: 20px;
}

.footer-desc {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.8;
    margin-bottom: 24px;
}

.footer-contact-info {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 2;
}

.footer-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 24px;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    font-size: 14px;
    color: var(--text-muted);
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--gold-primary);
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding: 24px 0;
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
}

/* ===== 产品中心页面 ===== */
.page-header {
    padding-top: 120px;
    padding-bottom: 60px;
    background: linear-gradient(135deg, var(--bg-primary), var(--bg-secondary));
    text-align: center;
}

.page-title {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.page-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
}

.products-section {
    padding: 60px 0 100px;
    background: var(--bg-primary);
}

.products-layout {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 40px;
}

.sidebar {
    position: sticky;
    top: 100px;
    height: fit-content;
}

.sidebar-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.category-list li {
    margin-bottom: 8px;
}

.category-list a {
    display: block;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 14px;
    color: var(--text-secondary);
    transition: all 0.3s ease;
}

.category-list a:hover,
.category-list a.active {
    background: rgba(201, 169, 98, 0.1);
    color: var(--gold-primary);
}

.search-box {
    margin-bottom: 32px;
    position: relative;
}

.search-box input {
    width: 100%;
    padding: 14px 20px 14px 48px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
    transition: all 0.3s ease;
}

.search-box input:focus {
    border-color: var(--gold-primary);
    box-shadow: 0 0 0 3px rgba(201, 169, 98, 0.1);
}

.search-box::before {
    content: '🔍';
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 16px;
}

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

/* ===== 产品详情页 ===== */
.product-detail-section {
    padding: 100px 0;
    background: var(--bg-primary);
}

.product-detail-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.product-gallery {
    position: sticky;
    top: 100px;
}

.product-main-image {
    width: 100%;
    height: 400px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.product-main-image img {
    max-width: 80%;
    max-height: 80%;
    object-fit: contain;
}

.product-info-detail h1 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.product-category-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(201, 169, 98, 0.1);
    border: 1px solid var(--border-gold);
    border-radius: 50px;
    color: var(--gold-primary);
    font-size: 13px;
    margin-bottom: 24px;
}

.product-brief {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 32px;
}

.product-features {
    margin-bottom: 32px;
}

.product-features h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.feature-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 8px 0;
    font-size: 14px;
    color: var(--text-secondary);
}

.feature-list li::before {
    content: '✓';
    color: var(--gold-primary);
    font-weight: bold;
    flex-shrink: 0;
}

.product-actions {
    display: flex;
    gap: 16px;
}

.product-specs {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 40px;
}

.product-specs h2 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.spec-table {
    width: 100%;
    border-collapse: collapse;
}

.spec-table tr {
    border-bottom: 1px solid var(--border-color);
}

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

.spec-table td {
    padding: 14px 16px;
    font-size: 14px;
}

.spec-table td:first-child {
    width: 30%;
    color: var(--text-muted);
    font-weight: 500;
}

.spec-table td:last-child {
    color: var(--text-secondary);
}

.related-products {
    margin-top: 60px;
}

.related-products h2 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 32px;
    color: var(--text-primary);
}

/* ===== 关于我们页面 ===== */
.about-page-section {
    padding: 100px 0;
    background: var(--bg-primary);
}

.about-hero {
    text-align: center;
    margin-bottom: 80px;
}

.about-hero h1 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.about-hero p {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

.about-mission {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    margin-bottom: 80px;
    align-items: center;
}

.mission-content h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.mission-content p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}

.mission-image {
    height: 350px;
    background: var(--bg-card);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ===== 联系我们页面 ===== */
.contact-section {
    padding: 100px 0;
    background: var(--bg-primary);
}

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

.contact-info h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.contact-info > p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 40px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    margin-bottom: 20px;
    transition: all 0.3s ease;
}

.contact-item:hover {
    border-color: var(--gold-primary);
}

.contact-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, rgba(201, 169, 98, 0.2), rgba(201, 169, 98, 0.05));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gold-primary);
    font-size: 20px;
    flex-shrink: 0;
}

.contact-item-content h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.contact-item-content p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.contact-form {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 40px;
}

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

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

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
    transition: all 0.3s ease;
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--gold-primary);
    box-shadow: 0 0 0 3px rgba(201, 169, 98, 0.1);
}

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

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

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .category-grid,
    .advantage-grid,
    .cert-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .product-grid,
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-content,
    .about-mission,
    .product-detail-layout,
    .contact-layout {
        grid-template-columns: 1fr;
    }
    
    .products-layout {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        position: static;
    }
    
    .category-list {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
    }
    
    .category-list a {
        white-space: nowrap;
    }
}

@media (max-width: 768px) {
    .nav-menu,
    .nav-phone {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .hero-visual {
        display: none;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .category-grid,
    .advantage-grid,
    .cert-grid,
    .product-grid,
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .about-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: 12px;
    }
    
    .stat-number {
        font-size: 24px;
    }
    
    .page-title {
        font-size: 32px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}