/* ============================================================
   全局样式 - 上海泓锦浩机械科技有限公司
   优化版本：更现代、更专业
   ============================================================ */

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

:root {
    /* 主色调 */
    --blue:       #1a6db5;
    --blue-dark:  #125494;
    --blue-light: #e8f4fd;
    --blue-bg:    #f0f7ff;
    
    /* 强调色 */
    --orange:     #e67e22;
    --orange-light: #fff3e0;
    
    /* 绿色 */
    --green:      #27ae60;
    --green-light: #e8f8e8;
    
    /* 紫色 */
    --purple:     #9b59b6;
    --purple-light: #f4eef7;
    
    /* 红色 */
    --red:        #e74c3c;
    --red-light:   #fde8e8;
    
    /* 灰色阶 */
    --gray-50:    #f8fafc;
    --gray-100:   #f1f5f9;
    --gray-200:   #e2e8f0;
    --gray-300:   #cbd5e1;
    --gray-400:   #94a3b8;
    --gray-500:   #64748b;
    --gray-600:   #475569;
    --gray-700:   #334155;
    --gray-800:   #1e293b;
    --gray-900:   #0f172a;
    
    /* 功能色 */
    --white:      #ffffff;
    --shadow:     0 4px 24px rgba(0,0,0,0.06);
    --shadow-md:  0 8px 32px rgba(0,0,0,0.10);
    --shadow-lg:  0 12px 48px rgba(0,0,0,0.12);
    --shadow-xl:  0 20px 60px rgba(0,0,0,0.15);
    
    --radius:     12px;
    --radius-lg:   16px;
    --radius-xl:  24px;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.2s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', -apple-system, sans-serif;
    color: var(--gray-700);
    background: var(--white);
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ── 按钮优化 ── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--blue), var(--blue-dark));
    color: #fff;
    box-shadow: 0 4px 16px rgba(26,109,181,0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--blue-dark), #0e4a7a);
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(26,109,181,0.4);
}

.btn-outline {
    background: transparent;
    color: var(--blue);
    border: 2px solid var(--blue);
    padding: 12px 30px;
}

.btn-outline:hover {
    background: var(--blue);
    color: #fff;
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(26,109,181,0.3);
}

.btn-white {
    background: #fff;
    color: var(--blue);
    font-weight: 600;
    box-shadow: 0 4px 16px rgba(255,255,255,0.2);
}

.btn-white:hover {
    background: var(--blue-light);
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(255,255,255,0.3);
}

.btn-outline-white {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255,255,255,0.7);
    padding: 12px 30px;
}

.btn-outline-white:hover {
    background: rgba(255,255,255,0.15);
    border-color: #fff;
    transform: translateY(-3px);
}

/* ── 导航优化 ── */
#navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 999;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 var(--gray-200);
    transition: var(--transition);
}

#navbar.scrolled {
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    background: rgba(255,255,255,0.98);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    transition: var(--transition-fast);
}

.logo:hover {
    transform: scale(1.02);
}

.logo-icon {
    font-size: 2rem;
    color: var(--blue);
    filter: drop-shadow(0 2px 4px rgba(26,109,181,0.2));
}

.logo-text strong {
    display: block;
    font-size: 1.15rem;
    color: var(--gray-900);
    line-height: 1.2;
    font-weight: 700;
}

.logo-text small {
    font-size: 0.75rem;
    color: var(--gray-500);
    letter-spacing: 0.05em;
}

.logo-light .logo-text strong {
    color: #fff;
}

.logo-light .logo-text small {
    color: rgba(255,255,255,0.7);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-links a {
    padding: 8px 18px;
    border-radius: 8px;
    font-size: 0.9rem;
    color: var(--gray-600);
    transition: var(--transition-fast);
    font-weight: 500;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--blue);
    border-radius: 1px;
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 60%;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--blue);
    background: var(--blue-light);
}

.btn-nav {
    background: linear-gradient(135deg, var(--blue), var(--blue-dark)) !important;
    color: #fff !important;
    padding: 8px 20px;
    border-radius: 8px;
    font-weight: 500;
    box-shadow: 0 4px 12px rgba(26,109,181,0.3);
}

.btn-nav:hover {
    background: linear-gradient(135deg, var(--blue-dark), #0e4a7a) !important;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(26,109,181,0.4);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    border-radius: 6px;
    transition: var(--transition-fast);
}

.hamburger:hover {
    background: var(--gray-100);
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--gray-700);
    border-radius: 2px;
    transition: var(--transition);
}

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

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

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

.mobile-menu {
    display: none;
    flex-direction: column;
    background: #fff;
    border-top: 1px solid var(--gray-200);
    padding: 12px 24px 20px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}

.mobile-menu a {
    padding: 14px 0;
    border-bottom: 1px solid var(--gray-100);
    color: var(--gray-700);
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

.mobile-menu a:hover {
    color: var(--blue);
    padding-left: 8px;
}

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

/* ── Hero 优化 ── */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #0a1628 0%, #1a3a6b 40%, #1e5096 70%, #2980b9 100%);
}

.hero-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.hero-content {
    position: relative;
    z-index: 1;
    padding: 140px 0 80px;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    border-radius: 30px;
    background: rgba(255,255,255,0.1);
    color: rgba(255,255,255,0.9);
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    margin-bottom: 2rem;
    border: 1px solid rgba(255,255,255,0.15);
    backdrop-filter: blur(10px);
}

.hero-title {
    font-size: clamp(2.2rem, 5vw, 3.8rem);
    color: #fff;
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: 1.8rem;
    max-width: 800px;
    letter-spacing: -0.02em;
}

.hero-sub {
    color: rgba(255,255,255,0.75);
    font-size: 1.15rem;
    margin-bottom: 3rem;
    max-width: 600px;
    line-height: 1.8;
}

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

.hero-scroll {
    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: 0.8rem;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid rgba(255,255,255,0.3);
    border-bottom: 2px solid rgba(255,255,255,0.3);
    transform: rotate(45deg);
    animation: bounce 1.6s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: rotate(45deg) translateY(0); }
    50%      { transform: rotate(45deg) translateY(8px); }
}

/* ── 统计栏优化 ── */
.stats-bar {
    background: linear-gradient(135deg, var(--gray-900), var(--gray-800));
    padding: 4rem 0;
    position: relative;
    overflow: hidden;
}

.stats-bar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--blue), var(--orange), var(--blue));
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.stat-item {
    text-align: center;
    padding: 2rem 1rem;
    position: relative;
}

.stat-item::after {
    content: '';
    position: absolute;
    right: 0;
    top: 20%;
    height: 60%;
    width: 1px;
    background: rgba(255,255,255,0.1);
}

.stat-item:last-child::after {
    display: none;
}

.stat-num {
    font-size: 3.2rem;
    font-weight: 700;
    color: var(--blue);
    line-height: 1;
    display: inline;
}

.stat-unit {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--blue);
}

.stat-item p {
    color: rgba(255,255,255,0.6);
    margin-top: 0.8rem;
    font-size: 0.9rem;
    letter-spacing: 0.05em;
}

/* ── 通用 section 优化 ── */
.section {
    padding: 7rem 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 4.5rem;
}

.section-tag {
    display: inline-block;
    padding: 6px 18px;
    border-radius: 30px;
    background: var(--blue-light);
    color: var(--blue);
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    margin-bottom: 1.2rem;
    text-transform: uppercase;
}

.section-title {
    font-size: clamp(1.8rem, 3vw, 2.6rem);
    color: var(--gray-900);
    font-weight: 700;
    margin-bottom: 1.2rem;
    letter-spacing: -0.02em;
}

.section-desc {
    color: var(--gray-500);
    max-width: 600px;
    margin: 0 auto;
    font-size: 1rem;
    line-height: 1.8;
}

/* ── 服务卡片优化 ── */
.services {
    background: var(--gray-50);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.service-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 2.5rem 2rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--gray-200);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--blue), var(--orange));
    opacity: 0;
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.service-card:hover::before {
    opacity: 1;
}

.service-card.featured {
    border-color: var(--blue);
    transform: scale(1.02);
}

.service-card.featured::before {
    opacity: 1;
}

.service-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    font-size: 2rem;
    background: var(--blue-light);
    color: var(--blue);
    transition: var(--transition);
}

.service-card:hover .service-icon {
    transform: scale(1.1) rotate(5deg);
    background: var(--blue);
    color: #fff;
}

.service-card h3 {
    font-size: 1.2rem;
    color: var(--gray-900);
    margin-bottom: 0.8rem;
    font-weight: 600;
}

.service-card p {
    color: var(--gray-500);
    font-size: 0.92rem;
    line-height: 1.8;
}

.card-link {
    color: var(--blue);
    font-size: 0.9rem;
    font-weight: 500;
    margin-top: 1.2rem;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition-fast);
}

.card-link:hover {
    gap: 10px;
    color: var(--blue-dark);
}

/* ── 为什么选择我们优化 ── */
.why-us {
    background: #fff;
}

.why-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6rem;
    align-items: center;
}

.why-list {
    margin-top: 2.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.why-list li {
    display: flex;
    gap: 1.2rem;
    align-items: flex-start;
    padding: 1rem;
    border-radius: var(--radius);
    transition: var(--transition-fast);
}

.why-list li:hover {
    background: var(--gray-50);
}

.why-icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--blue), var(--blue-dark));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.85rem;
    flex-shrink: 0;
    margin-top: 2px;
    box-shadow: 0 4px 12px rgba(26,109,181,0.3);
}

.why-list strong {
    display: block;
    color: var(--gray-900);
    margin-bottom: 0.4rem;
    font-weight: 600;
    font-size: 1.05rem;
}

.why-list p {
    color: var(--gray-500);
    font-size: 0.9rem;
    line-height: 1.7;
}

.why-visual {
    display: flex;
    align-items: center;
    justify-content: center;
}

.why-img-wrap {
    position: relative;
    width: 100%;
    max-width: 420px;
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.why-img-bg {
    position: absolute;
    inset: 0;
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    background: linear-gradient(135deg, var(--blue-light), #dbeafe);
    animation: morphBlob 8s ease-in-out infinite;
}

@keyframes morphBlob {
    0%, 100% { border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%; }
    50%      { border-radius: 70% 30% 30% 70% / 70% 70% 30% 30%; }
}

.why-img-card {
    position: relative;
    z-index: 1;
    background: #fff;
    border-radius: var(--radius-xl);
    padding: 3rem 2.5rem;
    box-shadow: var(--shadow-lg);
    text-align: center;
    width: 75%;
}

.cert-badge {
    margin-bottom: 1.5rem;
}

.cert-num {
    display: block;
    font-size: 3.8rem;
    font-weight: 700;
    color: var(--blue);
    line-height: 1;
    letter-spacing: -0.02em;
}

.cert-text {
    font-size: 0.92rem;
    color: var(--gray-500);
    margin-top: 0.5rem;
}

.feature-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-top: 1.5rem;
}

.tag {
    padding: 6px 16px;
    border-radius: 30px;
    background: var(--blue-light);
    color: var(--blue);
    font-size: 0.82rem;
    font-weight: 500;
    transition: var(--transition-fast);
}

.tag:hover {
    background: var(--blue);
    color: #fff;
    transform: translateY(-2px);
}

/* ── 产品预览优化 ── */
.products-preview {
    background: var(--gray-50);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.product-card {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--gray-200);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.product-img {
    height: 220px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4.5rem;
    position: relative;
    overflow: hidden;
    background: var(--gray-50);
}

.product-img::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--blue), var(--orange));
    opacity: 0;
    transition: var(--transition);
}

.product-card:hover .product-img::after {
    opacity: 1;
}

.product-body {
    padding: 1.5rem;
}

.product-cat {
    font-size: 0.75rem;
    color: var(--blue);
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: 0.6rem;
}

.product-body h3 {
    font-size: 1.05rem;
    color: var(--gray-900);
    margin-bottom: 0.6rem;
    font-weight: 600;
    line-height: 1.4;
}

.product-body p {
    color: var(--gray-500);
    font-size: 0.88rem;
    line-height: 1.7;
}

/* ── 评价优化 ── */
.testimonials {
    background: #fff;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.testimonial-card {
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    padding: 2rem;
    border: 1px solid var(--gray-200);
    transition: var(--transition);
    position: relative;
}

.testimonial-card::before {
    content: '"';
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    font-size: 4rem;
    color: var(--blue);
    opacity: 0.1;
    font-family: Georgia, serif;
    line-height: 1;
}

.testimonial-card:hover {
    box-shadow: var(--shadow);
    transform: translateY(-6px);
    background: #fff;
}

.stars {
    color: #f59e0b;
    font-size: 1.1rem;
    margin-bottom: 1.2rem;
    letter-spacing: 2px;
}

.testimonial-card p {
    color: var(--gray-700);
    font-size: 0.95rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--gray-200);
}

.author-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--blue), var(--blue-dark));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
    box-shadow: 0 4px 12px rgba(26,109,181,0.3);
}

.testimonial-author strong {
    display: block;
    font-size: 0.95rem;
    color: var(--gray-900);
    font-weight: 600;
}

.testimonial-author small {
    font-size: 0.82rem;
    color: var(--gray-500);
}

/* ── CTA 优化 ── */
.cta-section {
    background: linear-gradient(135deg, #1a3a6b, #1a6db5);
    padding: 6rem 0;
    text-align: center;
    color: #fff;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Ccircle cx='50' cy='50' r='40'/%3E%3C/g%3E%3C/svg%3E");
}

.cta-section h2 {
    font-size: 2.4rem;
    margin-bottom: 1.2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.cta-section p {
    color: rgba(255,255,255,0.8);
    margin-bottom: 3rem;
    font-size: 1.1rem;
    line-height: 1.8;
}

.cta-btns {
    display: flex;
    gap: 1.2rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ── 页脚优化 ── */
footer {
    background: linear-gradient(135deg, var(--gray-900), var(--gray-800));
    color: rgba(255,255,255,0.7);
    padding: 5rem 0 0;
}

.footer-inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 4rem;
    padding-bottom: 4rem;
}

.footer-brand p {
    margin-top: 1.2rem;
    font-size: 0.9rem;
    line-height: 1.8;
    max-width: 280px;
    color: rgba(255,255,255,0.5);
}

.footer-links h4,
.footer-contact h4 {
    color: #fff;
    font-size: 1rem;
    margin-bottom: 1.5rem;
    font-weight: 600;
    letter-spacing: 0.05em;
}

.footer-links a {
    display: block;
    padding: 6px 0;
    font-size: 0.9rem;
    transition: var(--transition-fast);
    color: rgba(255,255,255,0.5);
}

.footer-links a:hover {
    color: #fff;
    padding-left: 8px;
}

.footer-contact p {
    font-size: 0.9rem;
    margin-bottom: 0.8rem;
    color: rgba(255,255,255,0.6);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding: 2rem 0;
    text-align: center;
}

.footer-bottom p {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.35);
}

/* ============================================================
   关于我们 页
   ============================================================ */
.page-hero {
    background: linear-gradient(135deg, #0a1628 0%, #1a3a6b 60%, #1a6db5 100%);
    padding: 160px 0 100px;
    text-align: center;
    color: #fff;
    position: relative;
    overflow: hidden;
}

.page-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.page-hero h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: 1.2rem;
    letter-spacing: -0.02em;
}

.page-hero p {
    color: rgba(255,255,255,0.75);
    max-width: 600px;
    margin: 0 auto;
    font-size: 1.05rem;
}

.breadcrumb {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    justify-content: center;
    margin-bottom: 2rem;
}

.breadcrumb a,
.breadcrumb span {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.6);
}

.breadcrumb a:hover {
    color: #fff;
}

.breadcrumb .sep {
    opacity: 0.3;
}

.about-story {
    padding: 7rem 0;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6rem;
    align-items: center;
}

.about-img-placeholder {
    aspect-ratio: 4/3;
    border-radius: var(--radius-xl);
    overflow: hidden;
    background: linear-gradient(135deg, var(--blue-light), #dbeafe);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
}

.about-img-inner {
    text-align: center;
}

.about-img-inner .big-icon {
    font-size: 6rem;
    margin-bottom: 1.2rem;
    filter: drop-shadow(0 4px 8px rgba(26,109,181,0.2));
}

.about-img-inner p {
    color: var(--blue);
    font-weight: 600;
    font-size: 1.2rem;
}

.about-text h2 {
    font-size: 2.2rem;
    color: var(--gray-900);
    margin-bottom: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.about-text p {
    color: var(--gray-500);
    font-size: 1rem;
    line-height: 1.9;
    margin-bottom: 1.2rem;
}

.values-section {
    background: var(--gray-50);
    padding: 7rem 0;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.value-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 2.5rem 2rem;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--gray-200);
}

.value-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.value-icon {
    font-size: 3rem;
    margin-bottom: 1.2rem;
    display: inline-block;
    transition: var(--transition);
}

.value-card:hover .value-icon {
    transform: scale(1.15) rotate(5deg);
}

.value-card h3 {
    font-size: 1.1rem;
    color: var(--gray-900);
    margin-bottom: 0.8rem;
    font-weight: 600;
}

.value-card p {
    color: var(--gray-500);
    font-size: 0.9rem;
    line-height: 1.8;
}

.team-section {
    padding: 7rem 0;
}

.timeline {
    position: relative;
    padding: 3rem 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, transparent, var(--gray-300), transparent);
    transform: translateX(-50%);
}

.timeline-item {
    display: flex;
    gap: 3rem;
    margin-bottom: 3rem;
    align-items: flex-start;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-content {
    flex: 1;
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 2rem 2.5rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}

.timeline-content:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.timeline-year {
    font-size: 0.82rem;
    color: var(--blue);
    font-weight: 700;
    letter-spacing: 0.1em;
    margin-bottom: 0.8rem;
    text-transform: uppercase;
}

.timeline-content h3 {
    font-size: 1.15rem;
    color: var(--gray-900);
    margin-bottom: 0.6rem;
    font-weight: 600;
}

.timeline-content p {
    color: var(--gray-500);
    font-size: 0.92rem;
    line-height: 1.8;
}

.timeline-dot {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--blue);
    border: 4px solid #fff;
    box-shadow: 0 0 0 3px var(--blue), 0 4px 12px rgba(26,109,181,0.3);
    flex-shrink: 0;
    margin-top: 1.8rem;
    position: relative;
    z-index: 1;
    transition: var(--transition);
}

.timeline-item:hover .timeline-dot {
    transform: scale(1.2);
    box-shadow: 0 0 0 4px var(--blue), 0 6px 16px rgba(26,109,181,0.4);
}

.timeline-spacer {
    flex: 1;
}

/* ============================================================
   产品服务 页
   ============================================================ */
.products-page {
    padding: 5rem 0;
}

.product-filters {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 3.5rem;
    justify-content: center;
}

.filter-btn {
    padding: 10px 24px;
    border-radius: 30px;
    border: 2px solid var(--gray-200);
    background: #fff;
    color: var(--gray-700);
    cursor: pointer;
    font-size: 0.9rem;
    transition: var(--transition-fast);
    font-weight: 500;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--blue);
    color: #fff;
    border-color: var(--blue);
    box-shadow: 0 4px 12px rgba(26,109,181,0.3);
    transform: translateY(-2px);
}

.products-full-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

/* ============================================================
   联系我们 页
   ============================================================ */
.contact-section {
    padding: 7rem 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 5rem;
}

.contact-info h2 {
    font-size: 2rem;
    color: var(--gray-900);
    margin-bottom: 1.2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.contact-info p {
    color: var(--gray-500);
    margin-bottom: 2.5rem;
    font-size: 1rem;
    line-height: 1.8;
}

.contact-items {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-item {
    display: flex;
    gap: 1.2rem;
    align-items: flex-start;
    padding: 1.2rem;
    border-radius: var(--radius);
    transition: var(--transition-fast);
}

.contact-item:hover {
    background: var(--gray-50);
}

.contact-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--blue-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    flex-shrink: 0;
    transition: var(--transition);
}

.contact-item:hover .contact-icon {
    background: var(--blue);
    color: #fff;
    transform: scale(1.1);
}

.contact-item h4 {
    font-size: 0.85rem;
    color: var(--gray-500);
    margin-bottom: 0.3rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.contact-item p {
    font-size: 1rem;
    color: var(--gray-900);
    font-weight: 500;
}

.contact-form-wrap {
    background: var(--gray-50);
    border-radius: var(--radius-xl);
    padding: 3rem;
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow);
}

.contact-form-wrap h3 {
    font-size: 1.4rem;
    color: var(--gray-900);
    margin-bottom: 2.5rem;
    font-weight: 600;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.2rem;
    margin-bottom: 1.2rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    margin-bottom: 1.2rem;
}

.form-group label {
    font-size: 0.9rem;
    color: var(--gray-700);
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 14px 16px;
    border: 1.5px solid var(--gray-200);
    border-radius: 10px;
    font-size: 0.95rem;
    font-family: inherit;
    background: #fff;
    transition: var(--transition-fast);
    color: var(--gray-900);
    width: 100%;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--blue);
    box-shadow: 0 0 0 4px rgba(26,109,181,0.1);
    background: var(--blue-bg);
}

.form-group textarea {
    resize: vertical;
    min-height: 140px;
}

.form-submit {
    width: 100%;
    padding: 16px;
    font-size: 1.05rem;
    font-weight: 600;
    margin-top: 0.5rem;
}

.map-section {
    background: var(--gray-50);
    padding: 5rem 0;
}

.map-placeholder {
    background: linear-gradient(135deg, var(--blue-light), #dbeafe);
    border-radius: var(--radius-xl);
    height: 360px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow);
}

.map-placeholder-inner {
    text-align: center;
    color: var(--gray-500);
}

.map-placeholder-inner .map-icon {
    font-size: 4rem;
    margin-bottom: 1.2rem;
    filter: drop-shadow(0 4px 8px rgba(26,109,181,0.2));
}

.map-placeholder-inner p {
    font-size: 1.05rem;
    color: var(--gray-700);
}

/* ============================================================
   响应式优化
   ============================================================ */
@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .products-full-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .values-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-inner {
        grid-template-columns: 1fr 1fr;
        gap: 3rem;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hamburger {
        display: flex;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .why-inner {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .why-visual {
        display: none;
    }
    
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .products-full-grid {
        grid-template-columns: 1fr;
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .values-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-inner {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
    
    .timeline::before {
        display: none;
    }
    
    .timeline-item,
    .timeline-item:nth-child(even) {
        flex-direction: column;
        gap: 1rem;
    }
    
    .timeline-dot {
        display: none;
    }
    
    .timeline-spacer {
        display: none;
    }
}

@media (max-width: 480px) {
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .cta-btns {
        flex-direction: column;
        align-items: center;
    }
    
    .section {
        padding: 5rem 0;
    }
}

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

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

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

/* ============================================================
   滚动条美化
   ============================================================ */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
}

/* ============================================================
   选择文本样式
   ============================================================ */
::selection {
    background: var(--blue);
    color: #fff;
}