/* ============================================
   广州千骏科技有限公司 - 官方网站样式
   Guangzhou Qianjun Technology Co., Ltd.
   ============================================ */

/* CSS变量 */
:root {
    --primary: #1a3a5c;
    --primary-light: #264d73;
    --primary-dark: #0f2440;
    --accent: #c8a45c;
    --accent-light: #e0c78a;
    --accent-dark: #a07d3a;
    --white: #ffffff;
    --light-gray: #f5f5f5;
    --gray: #e0e0e0;
    --dark-gray: #666666;
    --text: #333333;
    --text-light: #888888;
    --shadow: 0 2px 15px rgba(0,0,0,0.08);
    --shadow-hover: 0 8px 30px rgba(0,0,0,0.15);
    --radius: 8px;
    --transition: all 0.3s ease;
}

/* 重置和基础样式 */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    color: var(--text);
    line-height: 1.7;
    background: var(--white);
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

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

/* ============================================
   顶部导航栏
   ============================================ */
.header, .navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(10px);
    box-shadow: 0 1px 0 rgba(0,0,0,0.06);
    transition: var(--transition);
}

.header.scrolled, .navbar.scrolled {
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
}

.header-inner, .nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

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

.logo-icon {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    font-weight: 900;
    font-size: 22px;
    letter-spacing: -1px;
}

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

.logo-text .brand,
.logo-text .logo-name {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: 1px;
}

.logo-text .subtitle,
.logo-text .logo-sub {
    font-size: 11px;
    color: var(--dark-gray);
    letter-spacing: 2px;
}

/* 导航菜单 */
.nav-links {
    display: flex;
    gap: 32px;
    align-items: center;
}

.nav-links a {
    font-size: 15px;
    color: var(--text);
    font-weight: 500;
    position: relative;
    padding: 4px 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s ease;
}

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

.nav-links a:hover {
    color: var(--accent-dark);
}

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

.menu-toggle span {
    width: 26px;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
    border-radius: 2px;
}

/* ============================================
   Hero区域
   ============================================ */
.hero {
    min-height: 100vh;
    background: linear-gradient(135deg, #0f2440 0%, #1a3a5c 40%, #264d73 100%);
    position: relative;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(200,164,92,0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(200,164,92,0.08) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 1280px;
    margin: 0 auto;
    padding: 120px 24px 80px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-text {
    color: var(--white);
}

.hero-badge {
    display: inline-block;
    background: rgba(200,164,92,0.2);
    border: 1px solid rgba(200,164,92,0.4);
    color: var(--accent-light);
    padding: 6px 20px;
    border-radius: 30px;
    font-size: 13px;
    letter-spacing: 3px;
    margin-bottom: 24px;
}

.hero-text h1 {
    font-size: 52px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero-text h1 .highlight {
    color: var(--accent);
}

.hero-text .subtitle {
    font-size: 18px;
    color: rgba(255,255,255,0.7);
    line-height: 1.8;
    margin-bottom: 36px;
    max-width: 500px;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    letter-spacing: 0.5px;
}

.btn-primary {
    background: var(--accent);
    color: var(--primary-dark);
}

.btn-primary:hover {
    background: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(200,164,92,0.4);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255,255,255,0.3);
}

.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px);
}

/* Hero右侧 - 产品展示卡片 */
.hero-visual {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.hero-card, .hero-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.hero-cards .hero-card-item,
.hero-card {
    background: rgba(255,255,255,0.08);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 16px;
    padding: 24px;
    text-align: center;
    transition: var(--transition);
}

.hero-cards .hero-card-item:hover,
.hero-card:hover {
    background: rgba(255,255,255,0.12);
    transform: translateY(-4px);
    border-color: rgba(200,164,92,0.4);
}

.hero-card .card-icon,
.hero-card-item .hci-num {
    font-size: 36px;
    margin-bottom: 8px;
    color: var(--accent);
    font-weight: 800;
}

.hero-card .card-title,
.hero-card-item .hci-label {
    color: rgba(255,255,255,0.7);
    font-size: 14px;
    font-weight: 500;
}

.hero-card .card-subtitle {
    color: rgba(255,255,255,0.5);
    font-size: 11px;
    margin-top: 4px;
}

/* 滚动指示器 */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: rgba(255,255,255,0.5);
    font-size: 12px;
    letter-spacing: 2px;
    animation: bounce 2s infinite;
}

.scroll-indicator::before {
    content: '';
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, rgba(200,164,92,0.5), rgba(200,164,92,0));
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

/* ============================================
   通用区块标题
   ============================================ */
.section {
    padding: 100px 0;
}

.section.bg-gray {
    background: var(--light-gray);
}

.section-desc,
.section-header .section-desc {
    color: var(--dark-gray);
    font-size: 15px;
    line-height: 1.8;
    max-width: 700px;
    margin: 0 auto;
}

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

.section-header .section-tag,
.section-label,
.section-header .section-label {
    display: inline-block;
    color: var(--accent-dark);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 12px;
}

.section-label-small {
    font-size: 12px;
    letter-spacing: 2px;
}

.section-header h2 {
    font-size: 38px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 16px;
}

.section-header .section-line {
    width: 60px;
    height: 3px;
    background: var(--accent);
    margin: 0 auto;
    border-radius: 2px;
}

.section-header p {
    color: var(--dark-gray);
    margin-top: 16px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

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

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

.about-image-wrapper {
    position: relative;
}

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

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

.about-badge {
    position: absolute;
    bottom: -20px;
    right: -20px;
    background: var(--primary);
    color: var(--white);
    padding: 20px 28px;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-hover);
}

.about-badge .number {
    font-size: 36px;
    font-weight: 800;
    color: var(--accent);
}

.about-badge .label {
    font-size: 12px;
    color: rgba(255,255,255,0.7);
    letter-spacing: 2px;
}

.about-content h3 {
    font-size: 28px;
    color: var(--primary);
    margin-bottom: 20px;
}

.about-content p {
    color: var(--dark-gray);
    margin-bottom: 16px;
    line-height: 1.8;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 24px;
}

.about-feature {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.about-feature .icon,
.af-item .af-icon {
    width: 40px;
    height: 40px;
    background: rgba(200,164,92,0.1);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
}

.about-feature h4,
.af-item h4 {
    font-size: 15px;
    color: var(--primary);
    margin-bottom: 4px;
}

.about-feature p,
.af-item p {
    font-size: 13px;
    color: var(--text-light);
    margin-bottom: 0;
}

/* ============================================
   商标展示区
   ============================================ */
.trademark-section {
    background: linear-gradient(135deg, var(--light-gray) 0%, #fafafa 100%);
}

.trademark-showcase {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
}

.trademark-card {
    background: var(--white);
    border-radius: 16px;
    padding: 40px;
    text-align: center;
    box-shadow: var(--shadow);
    min-width: 250px;
}

.trademark-logo {
    width: 120px;
    height: 120px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 42px;
    font-weight: 900;
    color: var(--accent);
    letter-spacing: 2px;
}

.trademark-card h3 {
    font-size: 20px;
    color: var(--primary);
    margin-bottom: 4px;
}

.trademark-info {
    font-size: 13px;
    color: var(--text-light);
}

.trademark-divider {
    font-size: 36px;
    color: var(--accent);
}

/* ============================================
   产品分类展示
   ============================================ */
.products-section {
    background: var(--white);
}

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

.product-card {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--gray);
}

.product-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-color: var(--accent);
}

.product-card-image {
    position: relative;
    height: 240px;
    overflow: hidden;
    background: var(--light-gray);
}

.product-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.product-card-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    background: var(--accent);
    color: var(--primary-dark);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 1px;
}

.product-card-body {
    padding: 20px;
}

.product-card-body h3 {
    font-size: 17px;
    color: var(--primary);
    margin-bottom: 8px;
}

.product-card-body p {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.6;
}

.product-card-body .brand-mark {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 12px;
    padding: 4px 10px;
    background: rgba(200,164,92,0.1);
    border-radius: 4px;
    font-size: 11px;
    color: var(--accent-dark);
    font-weight: 600;
    letter-spacing: 1px;
}

.brand-mark::before {
    content: '®';
    font-size: 8px;
}

/* 产品标签筛选 */
.product-filters {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 8px 20px;
    border: 1px solid var(--gray);
    background: var(--white);
    border-radius: 30px;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}

/* ============================================
   产品详情区域
   ============================================ */
.product-detail-section {
    padding: 100px 0;
    background: var(--light-gray);
}

.product-detail-section:nth-child(even) {
    background: var(--white);
}

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

.product-detail.reverse {
    direction: rtl;
}

.product-detail.reverse > * {
    direction: ltr;
}

.product-gallery {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.product-gallery .main-img {
    grid-column: 1 / -1;
    border-radius: 12px;
    overflow: hidden;
    height: 320px;
    background: var(--white);
    box-shadow: var(--shadow);
}

.product-gallery .main-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-gallery .thumb-img {
    border-radius: 8px;
    overflow: hidden;
    height: 160px;
    background: var(--white);
    box-shadow: var(--shadow);
}

.product-gallery .thumb-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-info h3 {
    font-size: 28px;
    color: var(--primary);
    margin-bottom: 8px;
}

.product-info .category-tag {
    display: inline-block;
    background: var(--accent);
    color: var(--primary-dark);
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 2px;
    margin-bottom: 16px;
}

.product-info p {
    color: var(--dark-gray);
    margin-bottom: 20px;
    line-height: 1.8;
}

.product-info .trademark-note {
    background: rgba(200,164,92,0.08);
    border-left: 3px solid var(--accent);
    padding: 12px 16px;
    border-radius: 0 8px 8px 0;
    margin-bottom: 20px;
}

.product-info .trademark-note strong {
    color: var(--accent-dark);
}

.product-specs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.spec-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--dark-gray);
}

.spec-item .dot {
    width: 6px;
    height: 6px;
    background: var(--accent);
    border-radius: 50%;
}

/* ============================================
   优势区域
   ============================================ */
.advantages-section {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
}

.advantages-section .section-header h2 {
    color: var(--white);
}

.advantages-section .section-header p {
    color: rgba(255,255,255,0.6);
}

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

.advantage-card {
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 16px;
    padding: 32px 24px;
    text-align: center;
    transition: var(--transition);
}

.advantage-card:hover {
    background: rgba(255,255,255,0.1);
    transform: translateY(-4px);
    border-color: rgba(200,164,92,0.4);
}

.advantage-icon,
.ac-icon {
    font-size: 40px;
    margin-bottom: 16px;
}

.advantage-card h4 {
    font-size: 17px;
    margin-bottom: 8px;
    color: var(--accent-light);
}

.advantage-card p {
    font-size: 13px;
    color: rgba(255,255,255,0.6);
    line-height: 1.6;
}

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

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

.contact-info h3 {
    font-size: 28px;
    color: var(--primary);
    margin-bottom: 16px;
}

.contact-info > p {
    color: var(--dark-gray);
    margin-bottom: 32px;
}

.contact-items {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

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

.contact-item .c-icon {
    width: 48px;
    height: 48px;
    background: rgba(200,164,92,0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    flex-shrink: 0;
}

.contact-item h4 {
    font-size: 15px;
    color: var(--primary);
    margin-bottom: 4px;
}

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

.contact-form {
    background: var(--light-gray);
    border-radius: 16px;
    padding: 36px;
}

.contact-form h4 {
    font-size: 20px;
    color: var(--primary);
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 6px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--gray);
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
    transition: var(--transition);
    background: var(--white);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(200,164,92,0.1);
}

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

/* ============================================
   页脚
   ============================================ */
.footer {
    background: var(--primary-dark);
    color: rgba(255,255,255,0.7);
    padding: 60px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-brand .logo-text .brand {
    color: var(--white);
}

.footer-brand p {
    font-size: 13px;
    line-height: 1.8;
    color: rgba(255,255,255,0.5);
}

/* Footer中的logo */
.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.footer-col .logo-name {
    color: var(--white);
}

.footer-col .logo-sub {
    color: rgba(255,255,255,0.5);
}

.footer-col h4 {
    color: var(--white);
    font-size: 16px;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 8px;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background: var(--accent);
}

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

.footer-col ul li a,
.footer-col > a {
    font-size: 13px;
    color: rgba(255,255,255,0.5);
    transition: var(--transition);
    display: block;
    margin-bottom: 8px;
}

.footer-col ul li a:hover,
.footer-col > a:hover {
    color: var(--accent);
    padding-left: 4px;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: rgba(255,255,255,0.3);
}

/* ============================================
   回到顶部
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow);
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

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

.back-to-top:hover {
    background: var(--accent);
    transform: translateY(-3px);
}

/* ============================================
   图片占位样式（用于无实际图片时）
   ============================================ */
.img-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #e8ecf1 0%, #dfe3e8 100%);
    color: var(--text-light);
    font-size: 14px;
}

.img-placeholder .ph-icon {
    font-size: 48px;
    margin-bottom: 8px;
}

.img-placeholder .ph-brand {
    font-size: 12px;
    color: var(--accent-dark);
    font-weight: 700;
    letter-spacing: 2px;
    margin-top: 4px;
}

/* 商标水印覆盖层 */
.tm-overlay {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(26,58,92,0.85);
    color: var(--accent);
    padding: 3px 10px;
    border-radius: 3px;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 1px;
}

/* ============================================
   内部页面通用样式
   ============================================ */

/* 页面Banner */
.page-banner {
    background: linear-gradient(135deg, #0f2440 0%, #1a3a5c 40%, #264d73 100%);
    padding: 140px 0 60px;
    text-align: center;
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.page-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(200,164,92,0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.page-banner h1 {
    font-size: 42px;
    font-weight: 800;
    margin-bottom: 12px;
    position: relative;
}

.page-banner h1 .highlight {
    color: var(--accent);
}

.page-banner .page-banner-subtitle {
    font-size: 16px;
    color: rgba(255,255,255,0.6);
    position: relative;
}

/* 面包屑 */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
    justify-content: center;
    flex-wrap: wrap;
    position: relative;
}

.breadcrumb a {
    color: var(--accent-light);
    font-size: 14px;
    transition: var(--transition);
}

.breadcrumb a:hover {
    color: var(--accent);
}

.breadcrumb .sep {
    color: rgba(255,255,255,0.4);
    font-size: 12px;
}

.breadcrumb span {
    color: rgba(255,255,255,0.7);
    font-size: 14px;
}

/* 页面主体 */
.page-body {
    padding: 80px 0;
}

.page-body.bg-gray {
    background: var(--light-gray);
}

.page-body.bg-white {
    background: var(--white);
}

/* 并排布局 */
.split-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

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

.split-grid .split-image img {
    width: 100%;
    height: 420px;
    object-fit: cover;
}

.split-content h2 {
    font-size: 32px;
    color: var(--primary);
    margin-bottom: 20px;
}

.split-content p {
    color: var(--dark-gray);
    line-height: 1.9;
    margin-bottom: 16px;
}

/* 图标列表 */
.icon-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 24px;
}

.icon-list-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.icon-list-item .il-icon {
    width: 44px;
    height: 44px;
    background: rgba(200,164,92,0.1);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}

.icon-list-item h4 {
    font-size: 15px;
    color: var(--primary);
    margin-bottom: 4px;
}

.icon-list-item p {
    font-size: 13px;
    color: var(--text-light);
    margin-bottom: 0;
}

/* 详情Hero区 */
.detail-hero {
    padding: 80px 0 0;
}

.detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

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

.detail-gallery .detail-main-img {
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-hover);
    margin-bottom: 12px;
    height: 400px;
}

.detail-gallery .detail-main-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.detail-gallery .detail-thumbs {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.detail-gallery .detail-thumb {
    border-radius: 10px;
    overflow: hidden;
    height: 120px;
    box-shadow: var(--shadow);
}

.detail-gallery .detail-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.detail-body h2 {
    font-size: 32px;
    color: var(--primary);
    margin-bottom: 8px;
}

.detail-body .detail-category {
    display: inline-block;
    background: var(--accent);
    color: var(--primary-dark);
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 2px;
    margin-bottom: 20px;
}

.detail-body .detail-desc {
    color: var(--dark-gray);
    line-height: 1.9;
    margin-bottom: 24px;
}

.detail-body .detail-brand-card {
    background: rgba(200,164,92,0.08);
    border-left: 3px solid var(--accent);
    padding: 16px 20px;
    border-radius: 0 10px 10px 0;
    margin-bottom: 24px;
}

.detail-body .detail-brand-card strong {
    color: var(--accent-dark);
}

.detail-specs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.detail-spec {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    background: var(--light-gray);
    border-radius: 8px;
    font-size: 14px;
    color: var(--dark-gray);
}

.detail-spec .ds-dot {
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
}

/* 回到产品 */
.back-products {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--accent-dark);
    font-weight: 600;
    font-size: 14px;
    margin-top: 32px;
    padding: 10px 20px;
    border: 1px solid var(--accent);
    border-radius: 30px;
    transition: var(--transition);
}

.back-products:hover {
    background: var(--accent);
    color: var(--primary-dark);
}

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-text h1 {
        font-size: 36px;
    }

    .hero-text .subtitle {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-visual {
        max-width: 500px;
        margin: 0 auto;
    }

    .product-grid {
        grid-template-columns: repeat(3, 1fr);
    }

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

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

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

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

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

    .split-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

    .detail-gallery {
        position: static;
    }

    .detail-specs {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        box-shadow: 0 4px 20px rgba(0,0,0,0.1);
        transform: translateY(-110%);
        transition: transform 0.3s ease;
        z-index: 999;
    }

    .nav-links.active {
        transform: translateY(0);
    }

    .menu-toggle {
        display: flex;
    }

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

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

    .section {
        padding: 60px 0;
    }

    .section-header h2 {
        font-size: 28px;
    }

    .hero-text h1 {
        font-size: 28px;
    }

    .trademark-showcase {
        gap: 24px;
    }

    .trademark-card {
        padding: 24px;
        min-width: auto;
    }

    .icon-list {
        grid-template-columns: 1fr;
    }

    .page-banner h1 {
        font-size: 30px;
    }

    .detail-gallery .detail-main-img {
        height: 280px;
    }
}

@media (max-width: 480px) {
    .product-grid {
        grid-template-columns: 1fr;
    }

    .hero-buttons {
        flex-direction: column;
    }

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

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

    .page-banner h1 {
        font-size: 24px;
    }

    .split-content h2 {
        font-size: 24px;
    }

    .detail-body h2 {
        font-size: 24px;
    }
}