/* ========================================
   泰液·苏中液压 - 移动端首页样式
   高端工业App风格，深色主题 + 金色点缀
   使用统一变量系统 (variables.css)
   ======================================== */

/* 重置样式 */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: var(--leading-normal);
    overflow-x: hidden;
    min-height: 100vh;
}

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

button {
    font-family: inherit;
    border: none;
    background: none;
    cursor: pointer;
    color: inherit;
}

/* ==================== 骨架屏 ==================== */
.skeleton-screen {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-primary);
    z-index: var(--z-modal);
    padding: var(--space-4);
    animation: skeletonFadeOut var(--duration-slow) ease var(--duration-slower) forwards;
}

.skeleton-header {
    height: var(--header-height);
    background: linear-gradient(90deg, var(--bg-secondary) 25%, rgba(30, 58, 95, 0.8) 50%, var(--bg-secondary) 75%);
    background-size: 200% 100%;
    animation: skeletonShimmer var(--duration-slower) infinite;
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
}

.skeleton-hero {
    height: 200px;
    background: linear-gradient(90deg, var(--bg-secondary) 25%, rgba(30, 58, 95, 0.8) 50%, var(--bg-secondary) 75%);
    background-size: 200% 100%;
    animation: skeletonShimmer var(--duration-slower) infinite;
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-4);
}

.skeleton-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.skeleton-item {
    height: 80px;
    background: linear-gradient(90deg, var(--bg-secondary) 25%, rgba(30, 58, 95, 0.8) 50%, var(--bg-secondary) 75%);
    background-size: 200% 100%;
    animation: skeletonShimmer var(--duration-slower) infinite;
    border-radius: var(--radius-md);
}

.skeleton-section {
    height: 150px;
    background: linear-gradient(90deg, var(--bg-secondary) 25%, rgba(30, 58, 95, 0.8) 50%, var(--bg-secondary) 75%);
    background-size: 200% 100%;
    animation: skeletonShimmer var(--duration-slower) infinite;
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-4);
}

@keyframes skeletonShimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

@keyframes skeletonFadeOut {
    to { opacity: 0; visibility: hidden; }
}

/* ==================== 主内容区 ==================== */
.main-content {
    opacity: 1;
    transition: opacity var(--duration-normal);
}

.main-content.hidden {
    opacity: 0;
}

/* ==================== 顶部导航栏 ==================== */
.header {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-3) var(--space-4);
    background: linear-gradient(180deg, var(--bg-primary) 0%, rgba(10, 22, 40, 0.95) 100%);
    backdrop-filter: blur(var(--blur-md));
    -webkit-backdrop-filter: blur(var(--blur-md));
    border-bottom: 1px solid var(--border-gold);
}

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

.logo-text {
    font-size: 20px;
    font-weight: var(--weight-bold);
    background: var(--gold-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-divider {
    color: var(--gold-primary);
    font-size: 18px;
}

.logo-sub {
    font-size: 16px;
    font-weight: var(--weight-medium);
    color: var(--text-primary);
}

.search-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    background: var(--bg-card);
    color: var(--text-primary);
    transition: all var(--duration-fast);
}

.search-btn:active {
    transform: scale(var(--scale-press));
    background: var(--bg-card-hover);
}

.search-btn svg {
    color: var(--gold-primary);
}

/* ==================== Hero轮播区 ==================== */
.hero-section {
    position: relative;
    padding: var(--space-4);
    overflow: hidden;
}

.hero-slider {
    position: relative;
    height: 200px;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration-slow);
    display: flex;
    align-items: center;
    padding: var(--space-6);
}

.hero-slide.active {
    opacity: 1;
    visibility: visible;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: 0;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(10, 22, 40, 0.85) 0%, rgba(5, 13, 24, 0.9) 100%);
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-block;
    padding: 4px 12px;
    background: var(--gold-gradient);
    color: var(--bg-primary);
    font-size: var(--text-xs);
    font-weight: var(--weight-semibold);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-3);
}

.hero-title {
    font-size: 28px;
    font-weight: var(--weight-bold);
    color: var(--text-primary);
    margin-bottom: var(--space-2);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-desc {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    margin-bottom: var(--space-3);
}

.hero-brands {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.brand-tag {
    font-size: var(--text-sm);
    color: var(--gold-light);
    font-weight: var(--weight-medium);
}

.brand-divider {
    color: var(--text-muted);
}

.hero-dots {
    display: flex;
    justify-content: center;
    gap: var(--space-2);
    margin-top: var(--space-3);
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: var(--radius-full);
    background: var(--bg-secondary);
    transition: all var(--duration-fast);
}

.dot.active {
    background: var(--gold-primary);
    width: 20px;
    border-radius: 4px;
}

/* ==================== 快捷入口 ==================== */
.quick-actions {
    padding: var(--space-4);
}

.quick-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-3);
}

.quick-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-gold);
    transition: all var(--duration-fast);
}

.quick-item:active {
    transform: scale(var(--scale-press));
    background: var(--bg-card-hover);
}

.quick-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(212, 175, 55, 0.15) 0%, rgba(212, 175, 55, 0.05) 100%);
    border-radius: var(--radius-md);
    color: var(--gold-primary);
}

.quick-text {
    font-size: var(--text-xs);
    color: var(--text-secondary);
}

/* ==================== 区块标题 ==================== */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) var(--space-4) var(--space-3);
}

.section-title {
    font-size: var(--text-lg);
    font-weight: var(--weight-semibold);
    color: var(--text-primary);
    position: relative;
    padding-left: 12px;
}

.section-title::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 18px;
    background: var(--gold-gradient);
    border-radius: 2px;
}

.section-more {
    font-size: var(--text-sm);
    color: var(--gold-primary);
    display: flex;
    align-items: center;
    gap: 4px;
}

.section-more::after {
    content: '>';
    font-size: var(--text-xs);
}

/* ==================== 产品分类横向滚动 ==================== */
.category-section {
    padding-bottom: var(--space-4);
}

.category-scroll {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding: 0 var(--space-4);
}

.category-scroll::-webkit-scrollbar {
    display: none;
}

.category-list {
    display: flex;
    gap: var(--space-3);
    padding-bottom: var(--space-2);
}

.category-item {
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-gold);
    min-width: 90px;
    transition: all var(--duration-fast);
}

.category-item:active {
    transform: scale(var(--scale-press));
    background: var(--bg-card-hover);
    border-color: var(--gold-primary);
}

.category-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gold-primary);
}

.category-name {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    white-space: nowrap;
}

/* ==================== 热门产品网格 ==================== */
.products-section {
    padding-bottom: var(--space-4);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
    padding: 0 var(--space-4);
}

.product-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border-gold);
    transition: all var(--duration-fast);
    opacity: 0;
    transform: translateY(20px);
}

.product-card.loaded {
    opacity: 1;
    transform: translateY(0);
}

.product-card:active {
    transform: scale(var(--scale-press));
}

.product-image {
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, rgba(30, 58, 95, 0.8) 0%, rgba(10, 22, 40, 0.6) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-placeholder {
    color: var(--text-muted);
}

.product-info {
    padding: var(--space-3);
}

.product-name {
    font-size: var(--text-sm);
    font-weight: var(--weight-medium);
    color: var(--text-primary);
    margin-bottom: 4px;
}

.product-desc {
    font-size: var(--text-xs);
    color: var(--text-secondary);
    margin-bottom: var(--space-2);
}

.product-meta {
    display: flex;
    gap: var(--space-2);
}

.product-tag {
    font-size: var(--text-xs);
    padding: 2px 8px;
    background: rgba(212, 175, 55, 0.15);
    color: var(--gold-primary);
    border-radius: 10px;
}

/* ==================== 企业优势 ==================== */
.advantages-section {
    padding-bottom: var(--space-4);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
    padding: 0 var(--space-4);
}

.advantage-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--space-4);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-gold);
    transition: all var(--duration-fast);
}

.advantage-card:active {
    transform: scale(var(--scale-press));
    background: var(--bg-card-hover);
}

.advantage-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(212, 175, 55, 0.15) 0%, rgba(212, 175, 55, 0.05) 100%);
    border-radius: var(--radius-lg);
    color: var(--gold-primary);
    margin-bottom: var(--space-3);
}

.advantage-title {
    font-size: var(--text-base);
    font-weight: var(--weight-semibold);
    color: var(--text-primary);
    margin-bottom: 4px;
}

.advantage-desc {
    font-size: var(--text-xs);
    color: var(--text-secondary);
}

/* ==================== 联系卡片 ==================== */
.contact-section {
    padding: var(--space-4);
}

.contact-card {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(30, 58, 95, 0.6) 100%);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    border: 1px solid var(--border-gold);
}

.contact-header {
    text-align: center;
    margin-bottom: var(--space-6);
}

.contact-title {
    font-size: var(--text-xl);
    font-weight: var(--weight-semibold);
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.contact-subtitle {
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    background: rgba(10, 22, 40, 0.4);
    border-radius: var(--radius-md);
    transition: all var(--duration-fast);
}

.contact-item:active {
    background: rgba(10, 22, 40, 0.6);
}

.contact-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(212, 175, 55, 0.2) 0%, rgba(212, 175, 55, 0.1) 100%);
    border-radius: var(--radius-md);
    color: var(--gold-primary);
    flex-shrink: 0;
}

.contact-detail {
    display: flex;
    flex-direction: column;
}

.contact-label {
    font-size: var(--text-xs);
    color: var(--text-secondary);
}

.contact-value {
    font-size: var(--text-base);
    font-weight: var(--weight-medium);
    color: var(--text-primary);
}

/* ==================== 底部留白 ==================== */
.bottom-spacer {
    height: 80px;
}

/* ==================== 底部Tab导航 ==================== */
.tab-nav,
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-around;
    padding: var(--space-2) 0 calc(var(--space-2) + var(--safe-bottom));
    background: linear-gradient(180deg, rgba(10, 22, 40, 0.98) 0%, var(--bg-primary) 100%);
    backdrop-filter: blur(var(--blur-md));
    -webkit-backdrop-filter: blur(var(--blur-md));
    border-top: 1px solid var(--border-gold);
    z-index: var(--z-fixed);
}

.tab-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: var(--space-2) var(--space-4);
    color: var(--text-secondary);
    transition: all var(--duration-fast);
    text-decoration: none;
}

.tab-item.active {
    color: var(--gold-primary);
}

.nav-icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-icon svg {
    width: 24px;
    height: 24px;
}

.nav-label {
    font-size: var(--text-xs);
    font-weight: var(--weight-medium);
}

.tab-icon {
    width: 24px;
    height: 24px;
}

.tab-text {
    font-size: var(--text-xs);
}

/* ==================== 弹窗 ==================== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: var(--z-modal);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration-normal);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-overlay);
    backdrop-filter: blur(var(--blur-sm));
    -webkit-backdrop-filter: blur(var(--blur-sm));
}

.modal-content {
    position: relative;
    background: var(--bg-primary);
    width: 100%;
    max-height: 80vh;
    border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
    transform: translateY(100%);
    transition: transform var(--duration-normal);
    overflow: hidden;
}

.modal.active .modal-content {
    transform: translateY(0);
}

/* ==================== 搜索弹窗 ==================== */
.search-modal {
    padding: var(--space-4);
}

.search-header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding-bottom: var(--space-4);
    border-bottom: 1px solid var(--border-gold);
}

.search-input {
    flex: 1;
    height: 44px;
    padding: 0 var(--space-4);
    background: var(--bg-card);
    border: 1px solid var(--border-gold);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: var(--text-base);
    outline: none;
}

.search-input::placeholder {
    color: var(--text-muted);
}

.search-input:focus {
    border-color: var(--gold-primary);
}

.search-close {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
}

.search-body {
    padding-top: var(--space-4);
}

.search-hot-title {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    margin-bottom: var(--space-3);
}

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

.hot-tag {
    padding: var(--space-2) var(--space-4);
    background: var(--bg-card);
    border: 1px solid var(--border-gold);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    color: var(--text-primary);
    transition: all var(--duration-fast);
}

.hot-tag:active {
    background: var(--bg-card-hover);
    border-color: var(--gold-primary);
}

/* ==================== 微信弹窗 ==================== */
.wechat-modal {
    padding: var(--space-6);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.wechat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    margin-bottom: var(--space-6);
}

.wechat-title {
    font-size: var(--text-lg);
    font-weight: var(--weight-semibold);
    color: var(--text-primary);
}

.modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
}

.wechat-body {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
}

.wechat-qr {
    text-align: center;
    margin-bottom: var(--space-4);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.wechat-qr-img {
    display: block;
    margin: 0 auto;
}

.wechat-tip {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    margin-top: var(--space-2);
}

.wechat-id {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-gold);
}

.wechat-label {
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

.wechat-value {
    font-size: var(--text-lg);
    font-weight: var(--weight-semibold);
    color: var(--gold-primary);
    font-family: var(--font-mono);
}

.copy-btn {
    padding: 6px 16px;
    background: var(--gold-gradient);
    color: var(--bg-primary);
    font-size: var(--text-sm);
    font-weight: var(--weight-medium);
    border-radius: var(--radius-sm);
    transition: all var(--duration-fast);
}

.copy-btn:active {
    transform: scale(var(--scale-press));
    opacity: 0.9;
}

/* ==================== 微信弹窗居中 ==================== */
#wechatModal {
    align-items: center !important;
    justify-content: center !important;
    flex-direction: column !important;
}

#wechatModal .modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

#wechatModal .modal-content {
    position: relative;
    border-radius: 20px;
    max-width: 320px;
    width: 90%;
    transform: scale(0.9);
    max-height: none;
    margin: 0 auto;
}

#wechatModal.active .modal-content {
    transform: scale(1);
}

/* ==================== Toast提示 ==================== */
.toast {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    padding: var(--space-3) var(--space-6);
    background: rgba(0, 0, 0, 0.85);
    color: var(--text-primary);
    font-size: var(--text-sm);
    border-radius: var(--radius-md);
    z-index: var(--z-toast);
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration-fast);
}

.toast.active {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%) scale(1);
}

/* ==================== 响应式适配 ==================== */
@media (max-width: 320px) {
    .quick-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

@media (min-width: 414px) {
    .hero-title {
        font-size: 32px;
    }

    .product-name {
        font-size: var(--text-base);
    }
}

/* ==================== 安全区域适配 ==================== */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
    .tab-nav,
    .bottom-nav {
        padding-bottom: calc(var(--space-2) + var(--safe-bottom));
    }
}

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

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.animate-in {
    animation: slideInUp var(--duration-normal) ease forwards;
}

.page-transition {
    animation: fadeIn var(--duration-fast);
}

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