/* ============================================
   Jucheng Pipe - Shared Components
   东莞俱成管业 - 全站通用组件样式
   ============================================
   包含：Header / Footer / Buttons / Cards /
         Forms / Section Headers / CTA Banner /
         Page Header / Tags / Utilities
   ============================================ */

/* ---- Base Extensions ---- */
body {
    color: var(--jc-gray-700);
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    /* color: var(--jc-gray-900); */
    font-weight: 700;
    line-height: var(--leading-tight);
}

/* ============================================
   1. Buttons 按钮系统
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 0 var(--space-5);
    height: 44px;
    font-size: var(--text-sm);
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: 1.5px solid transparent;
    transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.1s ease;
    white-space: nowrap;
    cursor: pointer;
    letter-spacing: 0.02em;
    text-decoration: none;
    font-family: inherit;
}

.btn:active {
    transform: translateY(1px);
}

.btn-primary {
    background: var(--jc-amber-500);
    color: #FFFFFF;
    border-color: var(--jc-amber-500);
}

.btn-primary:hover {
    background: var(--jc-amber-600);
    border-color: var(--jc-amber-600);
}

.btn-primary:active {
    background: var(--jc-amber-700);
    border-color: var(--jc-amber-700);
}

.btn-secondary {
    background: #FFFFFF;
    color: var(--jc-blue-600);
    border-color: var(--jc-blue-600);
}

.btn-secondary:hover {
    background: var(--jc-blue-50);
}

.btn-outline-light {
    background: transparent;
    color: #FFFFFF;
    border-color: rgba(255, 255, 255, 0.4);
}

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

.btn-outline {
    background: transparent;
    color: var(--jc-blue-600);
    border-color: var(--jc-blue-600);
}

.btn-outline:hover {
    background: var(--jc-blue-50);
}

.btn-ghost {
    background: transparent;
    color: var(--jc-blue-600);
    border-color: transparent;
    padding: 0 var(--space-3);
}

.btn-ghost:hover {
    background: var(--jc-blue-50);
}

.btn-lg {
    height: 52px;
    padding: 0 var(--space-6);
    font-size: var(--text-base);
}

.btn-sm {
    height: 36px;
    padding: 0 var(--space-4);
    font-size: var(--text-xs);
}

.btn-block {
    width: 100%;
}

/* ============================================
   2. Header 顶部导航
   ============================================ */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: var(--jc-blue-900);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    transition: box-shadow 0.3s ease;
}

.site-header.scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
}

.logo {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
    text-decoration: none;
}

.logo-cn {
    font-size: var(--text-xl);
    font-weight: 700;
    color: #FFFFFF;
    letter-spacing: 0.03em;
}

.logo-en {
    font-size: 11px;
    color: var(--jc-blue-200);
    letter-spacing: 0.15em;
    font-weight: 500;
    margin-top: 2px;
    text-transform: uppercase;
}

.nav-main {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.nav-main a {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
    font-weight: 500;
    color: rgba(255, 255, 255, 0.85);
    border-radius: var(--radius-sm);
    transition: color 0.2s ease, background-color 0.2s ease;
    text-decoration: none;
}

.nav-main a:hover {
    color: var(--jc-amber-400);
    background: rgba(255, 255, 255, 0.05);
}

.nav-main a.active {
    color: var(--jc-amber-400);
    font-weight: 600;
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--space-5);
}

.header-phone {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-xs);
    color: rgba(255, 255, 255, 0.7);
    font-weight: 500;
}

.header-phone .phone-icon {
    width: 16px;
    height: 16px;
    color: var(--jc-amber-400);
    flex-shrink: 0;
}

.header-phone .phone-number {
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    font-weight: 600;
    color: #FFFFFF;
}

.mobile-menu-btn {
    display: none;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-sm);
    color: #FFFFFF;
    background: transparent;
    cursor: pointer;
}

/* Header responsive */
@media (max-width: 1024px) {
    .nav-main {
        display: none;
    }
    .header-phone {
        display: none;
    }
    .mobile-menu-btn {
        display: flex;
    }
}

/* ============================================
   3. Footer 页脚
   ============================================ */
.site-footer {
    background: var(--jc-gray-900);
    color: var(--jc-gray-400);
    padding-top: var(--space-9);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
    gap: var(--space-7);
    margin-bottom: var(--space-7);
}

.footer-col-title {
    font-size: var(--text-sm);
    font-weight: 700;
    color: #FFFFFF;
    margin-bottom: var(--space-4);
    letter-spacing: 0.03em;
}

.footer-brand .logo-cn {
    color: #FFFFFF;
    font-size: var(--text-xl);
}

.footer-brand .logo-en {
    color: var(--jc-gray-500);
}

.footer-brand-desc {
    margin-top: var(--space-4);
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
    color: var(--jc-gray-400);
    margin-bottom: var(--space-4);
}

.footer-contact-mini {
    font-size: var(--text-sm);
    color: var(--jc-gray-400);
    line-height: 2;
}

.footer-contact-mini strong {
    color: var(--jc-amber-400);
    font-family: var(--font-mono);
    font-weight: 600;
}

.footer-links,
.footer-product-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    padding: 0;
    margin: 0;
}

.footer-links a,
.footer-product-list a {
    font-size: var(--text-sm);
    color: var(--jc-gray-400);
    transition: color 0.2s ease;
    text-decoration: none;
}

.footer-links a:hover,
.footer-product-list a:hover {
    color: var(--jc-amber-400);
}

.footer-qr-wrap {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.footer-qr {
    width: 110px;
    height: 110px;
    background: #FFFFFF;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--jc-gray-900);
    font-size: var(--text-xs);
    font-weight: 500;
    text-align: center;
    padding: var(--space-2);
}

.footer-qr-text {
    font-size: var(--text-xs);
    color: var(--jc-gray-500);
    line-height: 1.6;
}

.footer-qr-text strong {
    color: #FFFFFF;
    display: block;
    margin-bottom: 2px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: var(--space-5) 0;
}

.footer-bottom-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: var(--text-xs);
    color: var(--jc-gray-500);
    flex-wrap: wrap;
    gap: var(--space-3);
}

.footer-bottom a {
    color: var(--jc-gray-500);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-bottom a:hover {
    color: var(--jc-amber-400);
}

/* Footer responsive */
@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-6);
    }
}

@media (max-width: 640px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
    .footer-bottom-inner {
        flex-direction: column;
        text-align: center;
    }
}

/* ============================================
   4. Section Headers 区块标题
   ============================================ */
.section-header {
    text-align: center;
    margin-bottom: var(--space-8);
}

.section-header-left {
    text-align: left;
    margin-bottom: var(--space-7);
}

.section-eyebrow {
    display: inline-block;
    font-size: var(--text-xs);
    font-weight: 700;
    color: var(--jc-amber-500);
    letter-spacing: 0.15em;
    margin-bottom: var(--space-3);
    text-transform: uppercase;
}

.section-title {
    font-size: var(--text-4xl);
    font-weight: 700;
    color: var(--jc-gray-900);
    line-height: var(--leading-tight);
    margin-bottom: var(--space-4);
}

.section-desc {
    font-size: var(--text-base);
    color: var(--jc-gray-500);
    max-width: 640px;
    margin: 0 auto;
    line-height: var(--leading-relaxed);
}

.section-header-left .section-desc {
    margin: 0;
    max-width: 560px;
}

/* 深色背景上的section header */
.section-dark .section-title {
    color: #FFFFFF;
}

.section-dark .section-desc {
    color: var(--jc-blue-200);
}

/* ============================================
   5. CTA Banner 底部号召横幅
   ============================================ */
.cta-banner {
    background: linear-gradient(135deg, var(--jc-blue-800) 0%, var(--jc-blue-900) 100%);
    padding: var(--space-8) 0;
    position: relative;
    overflow: hidden;
}

.cta-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(245, 124, 0, 0.1) 0%, transparent 60%);
    pointer-events: none;
}

.cta-banner-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-6);
    flex-wrap: wrap;
    position: relative;
}

.cta-banner-text {
    color: #FFFFFF;
    flex: 1;
    min-width: 280px;
}

.cta-banner-title {
    font-size: var(--text-3xl);
    font-weight: 700;
    margin-bottom: var(--space-2);
    line-height: var(--leading-tight);
}

.cta-banner-desc {
    font-size: var(--text-base);
    color: var(--jc-blue-200);
}

.cta-banner .btn-primary {
    height: 56px;
    padding: 0 var(--space-7);
    font-size: var(--text-base);
    flex-shrink: 0;
}

@media (max-width: 768px) {
    .cta-banner-inner {
        flex-direction: column;
        text-align: center;
    }
    .cta-banner-title {
        font-size: var(--text-2xl);
    }
}

/* ============================================
   6. Page Header 内页顶部头部
   ============================================ */
.page-header {
    background: linear-gradient(135deg, var(--jc-blue-700) 0%, var(--jc-blue-900) 100%);
    padding: calc(68px + var(--space-8)) 0 var(--space-8);
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: radial-gradient(ellipse at right center, rgba(245, 124, 0, 0.08) 0%, transparent 60%);
    pointer-events: none;
}

.page-header-inner {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-5);
}

.page-breadcrumb {
    font-size: var(--text-sm);
    color: var(--jc-blue-200);
    margin-bottom: var(--space-4);
}

.page-breadcrumb a {
    color: var(--jc-blue-200);
    text-decoration: none;
    transition: color 0.2s ease;
}

.page-breadcrumb a:hover {
    color: var(--jc-amber-400);
}

.page-breadcrumb .separator {
    margin: 0 var(--space-2);
    color: var(--jc-blue-300);
}

.page-breadcrumb .current {
    color: #FFFFFF;
    font-weight: 500;
}

.page-header-title {
    font-size: var(--text-5xl);
    font-weight: 700;
    color: #FFFFFF;
    line-height: var(--leading-tight);
    margin-bottom: var(--space-4);
}

.page-header-desc {
    font-size: var(--text-lg);
    color: var(--jc-blue-200);
    max-width: 640px;
    line-height: var(--leading-relaxed);
}

@media (max-width: 768px) {
    .page-header-title {
        font-size: var(--text-3xl);
    }
    .page-header-desc {
        font-size: var(--text-base);
    }
}

/* ============================================
   7. Tags / Pills 标签
   ============================================ */
.tag {
    display: inline-block;
    font-size: var(--text-xs);
    font-weight: 600;
    padding: 3px 10px;
    border-radius: var(--radius-sm);
    letter-spacing: 0.03em;
    line-height: 1.5;
}

.tag-primary {
    color: var(--jc-blue-600);
    background: var(--jc-blue-50);
}

.tag-amber {
    color: var(--jc-amber-600);
    background: var(--jc-amber-50);
}

.tag-success {
    color: var(--state-success);
    background: var(--state-success-bg);
}

.tag-gray {
    color: var(--jc-gray-600);
    background: var(--jc-gray-100);
}

.tag-light {
    color: rgba(255, 255, 255, 0.9);
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.tag-outline {
    color: var(--jc-blue-600);
    background: transparent;
    border: 1px solid var(--jc-blue-300);
}

/* ============================================
   8. Cards 卡片基础
   ============================================ */
.card {
    background: #FFFFFF;
    border: 1px solid var(--jc-gray-200);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
    border-color: var(--jc-blue-400);
    box-shadow: 0 8px 24px rgba(10, 74, 143, 0.1);
}

.card-image {
    width: 100%;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background: var(--jc-gray-100);
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

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

.card-body {
    padding: var(--space-5);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.card-title {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--jc-gray-900);
    line-height: var(--leading-tight);
}

.card-desc {
    font-size: var(--text-sm);
    color: var(--jc-gray-500);
    line-height: var(--leading-relaxed);
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--space-4);
    margin-top: auto;
    border-top: 1px solid var(--jc-gray-100);
}

.card-link {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--jc-blue-600);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: color 0.2s ease, gap 0.2s ease;
}

.card-link:hover {
    color: var(--jc-blue-700);
    gap: 8px;
}

/* ============================================
   9. Forms 表单
   ============================================ */
.form-group {
    margin-bottom: var(--space-4);
}

.form-label {
    display: block;
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--jc-gray-700);
    margin-bottom: var(--space-2);
}

.form-label .required {
    color: var(--state-error);
    margin-left: 2px;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 10px 14px;
    font-size: var(--text-sm);
    font-family: inherit;
    color: var(--jc-gray-900);
    background: #FFFFFF;
    border: 1px solid var(--jc-gray-200);
    border-radius: var(--radius-sm);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    line-height: 1.5;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--jc-blue-500);
    box-shadow: 0 0 0 3px rgba(22, 93, 173, 0.1);
}

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

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%235C6575' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
    cursor: pointer;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
}

.form-check {
    display: flex;
    align-items: flex-start;
    gap: var(--space-2);
    font-size: var(--text-sm);
    color: var(--jc-gray-600);
    cursor: pointer;
}

.form-check input {
    margin-top: 2px;
    flex-shrink: 0;
}

.form-check a {
    color: var(--jc-blue-600);
    text-decoration: none;
}

@media (max-width: 640px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   10. Stats / Data Display 数据展示
   ============================================ */
.stats-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-5);
}

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

.stat-number {
    font-family: var(--font-mono);
    font-size: var(--text-4xl);
    font-weight: 700;
    color: var(--jc-gray-900);
    line-height: 1;
    margin-bottom: var(--space-2);
}

.stat-label {
    font-size: var(--text-sm);
    color: var(--jc-gray-500);
}

/* 深色背景数据 */
.stats-dark .stat-number {
    color: var(--jc-amber-400);
}

.stats-dark .stat-label {
    color: var(--jc-blue-200);
}

@media (max-width: 768px) {
    .stats-row {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-5);
    }
}

/* ============================================
   11. Utility Classes 工具类
   ============================================ */
.text-mono {
    font-family: var(--font-mono);
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.bg-white { background-color: #FFFFFF; }
.bg-gray-50 { background-color: var(--jc-gray-50); }
.bg-gray-100 { background-color: var(--jc-gray-100); }
.bg-blue-50 { background-color: var(--jc-blue-50); }
.bg-dark { background-color: var(--jc-blue-900); }

.text-white { color: #FFFFFF; }
.text-gray-900 { color: var(--jc-gray-900); }
.text-gray-700 { color: var(--jc-gray-700); }
.text-gray-500 { color: var(--jc-gray-500); }
.text-blue-600 { color: var(--jc-blue-600); }
.text-amber-500 { color: var(--jc-amber-500); }

.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.font-medium { font-weight: 500; }

.w-full { width: 100%; }
.max-w-3xl { max-width: 48rem; }
.mx-auto { margin-left: auto; margin-right: auto; }

/* 滚动条隐藏 */
.no-scrollbar::-webkit-scrollbar { display: none; }
.no-scrollbar { -ms-overflow-style: none; scrollbar-width: none; }

/* ============================================
   12. Brand Wall 品牌墙
   ============================================ */
.brand-wall {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: var(--space-4);
}

.brand-item {
    background: #FFFFFF;
    border: 1px solid var(--jc-gray-200);
    border-radius: var(--radius-sm);
    aspect-ratio: 3 / 2;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-2);
    transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
    overflow: hidden;
}

.brand-item:hover {
    border-color: var(--jc-blue-300);
    box-shadow: 0 4px 16px rgba(10, 74, 143, 0.08);
    transform: translateY(-2px);
}

.brand-item img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    filter: grayscale(30%);
    transition: filter 0.3s ease;
}

.brand-item:hover img {
    filter: grayscale(0%);
}

@media (max-width: 1024px) {
    .brand-wall {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 640px) {
    .brand-wall {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-3);
    }
}

/* 证书/授权墙变体 */
.cert-wall {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-5);
}

.cert-card {
    background: #FFFFFF;
    border: 1px solid var(--jc-gray-200);
    border-radius: var(--radius-sm);
    padding: var(--space-6) var(--space-5);
    text-align: center;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    position: relative;
}

.cert-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--jc-amber-500), var(--jc-amber-300));
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}

.cert-card:hover {
    border-color: var(--jc-blue-300);
    box-shadow: 0 8px 24px rgba(10, 74, 143, 0.1);
}

.cert-logo {
    width: 100%;
    aspect-ratio: 4 / 3;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-4);
    padding: var(--space-3);
    background: var(--jc-gray-50);
    border-radius: var(--radius-sm);
}

.cert-logo img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.cert-title {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--jc-gray-900);
    margin-bottom: var(--space-2);
}

.cert-desc {
    font-size: var(--text-xs);
    color: var(--jc-gray-500);
    line-height: 1.6;
}

@media (max-width: 768px) {
    .cert-wall {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

/* 减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
    .btn,
    .card,
    .card-image img,
    .site-header,
    .footer-links a,
    .footer-product-list a,
    .nav-main a {
        transition: none !important;
    }
    .card:hover .card-image img {
        transform: none !important;
    }
}