/**
 * =================================================================
 * 文件：css.css
 * 功能：全站通用样式 + 各页面独有样式
 * 说明：通过类名自动适配不同页面，公共样式只保留一份
 * =================================================================
 */

/* ================================================================
   一、全局基础（所有页面共用）
   ================================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:opsz@14..32&display=swap');

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

:root {
    --primary: #0f1f17;
    --primary-light: #1a3a2a;
    --accent: #c99a3b;
    --accent-glow: rgba(201, 154, 59, 0.25);
    --text-light: #f2efe8;
    --text-muted: #b3ad9e;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, sans-serif;
    background: #f6f4ef;
    color: #1e1e1c;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

/* 背景纹理（细微噪点） */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 9999;
    opacity: 0.4;
}


/* ================================================================
   二、导航栏（所有页面共用）
   ================================================================ */

.navbar {
    transition: background 0.4s, box-shadow 0.4s, backdrop-filter 0.4s;
    background: rgba(15, 31, 23, 0.85);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.navbar-scrolled {
    background: rgba(15, 31, 23, 0.95) !important;
    backdrop-filter: blur(12px) saturate(180%);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
}

.nav-link {
    position: relative;
    font-weight: 500;
    letter-spacing: 0.3px;
    color: rgba(255, 255, 255, 0.85);
}

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

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

.nav-link.active {
    color: #fff;
}


/* ================================================================
   三、滚动触发动画（所有页面共用）
   ================================================================ */

.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

.reveal-left {
    opacity: 0;
    transform: translateX(-40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.reveal-right {
    opacity: 0;
    transform: translateX(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-right.visible {
    opacity: 1;
    transform: translateX(0);
}


/* ================================================================
   四、金色按钮（所有页面共用）
   ================================================================ */

.btn-gold {
    background: linear-gradient(135deg, #d4a54a, #b8832a);
    border: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(201, 154, 59, 0.3);
}

.btn-gold:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 8px 30px rgba(201, 154, 59, 0.5);
    filter: brightness(1.08);
}

.btn-outline-gold {
    border: 2px solid var(--accent);
    color: var(--accent);
    transition: all 0.3s;
    background: transparent;
}

.btn-outline-gold:hover {
    background: var(--accent);
    color: #0f1f17;
    box-shadow: 0 0 30px var(--accent-glow);
}


/* ================================================================
   五、滚动进度条（所有页面共用）
   ================================================================ */

#scrollProgress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), #d4a54a);
    z-index: 99999;
    transition: width 0.1s;
}


/* ================================================================
   六、WhatsApp 浮动按钮（所有页面共用）
   ================================================================ */

.whatsapp-float {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 9998;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

.whatsapp-float .wa-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.whatsapp-float .wa-btn {
    width: 64px;
    height: 64px;
    background: #25D366;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 36px;
    box-shadow: 0 6px 30px rgba(37, 211, 102, 0.4);
    transition: transform 0.3s;
    position: relative;
    z-index: 2;
}

.whatsapp-float .wa-btn:hover {
    transform: scale(1.08);
    box-shadow: 0 8px 40px rgba(37, 211, 102, 0.55);
}

.whatsapp-float .wa-pulse {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: rgba(37, 211, 102, 0.3);
    z-index: 1;
    animation: waPulse 2s ease-out infinite;
}

@keyframes waPulse {
    0% { transform: scale(1); opacity: 0.8; }
    100% { transform: scale(1.6); opacity: 0; }
}

.whatsapp-float .wa-label {
    background: rgba(15, 31, 23, 0.9);
    backdrop-filter: blur(8px);
    color: #fff;
    padding: 6px 16px;
    border-radius: 30px;
    font-size: 12px;
    font-weight: 600;
    white-space: nowrap;
    border: 1px solid rgba(255, 255, 255, 0.1);
    animation: waBounce 2.5s ease-in-out infinite;
}

@keyframes waBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-4px); }
}

.whatsapp-float .wa-label i {
    margin-right: 4px;
    color: #25D366;
}


/* ================================================================
   七、回到顶部按钮（所有页面共用）
   ================================================================ */

.back-to-top {
    position: fixed;
    bottom: 200px;
    right: 10px;
    z-index: 9997;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(15, 31, 23, 0.85);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #fff;
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--accent);
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(201, 154, 59, 0.3);
}


/* ================================================================
   八、数字滚动动画（所有页面共用）
   ================================================================ */

.stat-number {
    display: inline-block;
    font-variant-numeric: tabular-nums;
}


/* ================================================================
   九、分类筛选按钮（首页 & 产品列表 & 新闻列表共用）
   ================================================================ */

.filter-btn {
    background: transparent;
    border: 2px solid transparent;
    color: #4a4a4a;
    transition: all 0.3s ease;
    font-weight: 500;
    padding: 0.4rem 1.5rem;
    border-radius: 40px;
    cursor: pointer;
    font-size: 0.85rem;
}

.filter-btn:hover {
    color: var(--accent);
    border-color: var(--accent);
    background: rgba(201, 154, 59, 0.06);
}

.filter-btn.active {
    background: var(--accent);
    color: #0f1f17;
    border-color: var(--accent);
    box-shadow: 0 4px 20px var(--accent-glow);
}


/* ================================================================
   十、分页按钮（产品列表 & 新闻列表共用）
   ================================================================ */

.page-num, .page-btn {
    width: 44px;
    height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: 1px solid #d1d1d1;
    color: #4a4a4a;
    transition: all 0.3s;
    background: transparent;
    font-weight: 500;
    cursor: pointer;
	margin:0 5px;
}

.page-num:hover, .page-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.page-num.page-num-current, .page-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #0f1f17;
}


/* ================================================================
   十一、信任优势卡片（首页 & About 页 & News 页共用）
   ================================================================ */

.trust-card {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 1.25rem;
    padding: 1.5rem;
    text-align: center;
    transition: transform 0.4s ease, box-shadow 0.4s ease, border-color 0.3s;
}

.trust-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.08);
    border-color: var(--accent);
}

.trust-card .icon-wrap {
    width: 64px;
    height: 64px;
    margin: 0 auto 0.75rem;
    border-radius: 50%;
    background: rgba(201, 154, 59, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: var(--accent);
    transition: background 0.3s;
}

.trust-card:hover .icon-wrap {
    background: rgba(201, 154, 59, 0.2);
}

.trust-card h4 {
    font-size: 1rem;
    font-weight: 700;
    color: #0f1f17;
    margin-bottom: 0.25rem;
}

.trust-card p {
    font-size: 0.85rem;
    color: #666;
    line-height: 1.5;
}


/* ================================================================
   十二、客户 Logo 墙（首页 & About 页共用）
   ================================================================ */

.logo-wall img {
    transition: opacity 0.3s, transform 0.3s;
    opacity: 0.6;
    /* filter: grayscale(100%); */
}

.logo-wall img:hover {
    opacity: 1;
    filter: grayscale(0%);
    transform: scale(1.05);
}


/* ================================================================
   十三、表单输入（所有页面共用）
   ================================================================ */

.form-input {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(0, 0, 0, 0.08);
    transition: all 0.3s;
}

.form-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px var(--accent-glow);
    background: white;
}


/* ================================================================
   十四、文章标签（新闻列表 & 新闻详情共用）
   ================================================================ */

.tag {
    display: inline-block;
    background: rgba(201, 154, 59, 0.12);
    color: var(--accent);
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.15rem 0.8rem;
    border-radius: 30px;
}


/* ================================================================
   十五、上一篇/下一篇导航（产品详情 & 新闻详情共用）
   ================================================================ */

.prev-next-nav {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

.prev-next-nav a {
    flex: 1;
    min-width: 180px;
    padding: 1rem 1.5rem;
    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: 1rem;
    transition: all 0.3s ease;
    text-decoration: none;
    color: #4a4a4a;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.prev-next-nav a:hover {
    border-color: var(--accent);
    background: rgba(255, 255, 255, 0.8);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    transform: translateY(-2px);
}

.prev-next-nav a.prev-link {
    justify-content: flex-start;
}

.prev-next-nav a.next-link {
    justify-content: flex-end;
}

.prev-next-nav a .direction {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--accent);
    font-weight: 600;
}

.prev-next-nav a .title {
    font-weight: 500;
    font-size: 0.9rem;
    color: #1e1e1c;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.prev-next-nav a.disabled {
    opacity: 0.3;
    pointer-events: none;
    cursor: default;
}

.prev-next-nav a .arrow {
    color: var(--accent);
    font-size: 1.1rem;
    flex-shrink: 0;
}


/* ================================================================
   十六、分享按钮（新闻详情）
   ================================================================ */

.share-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid #d1d1d1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #4a4a4a;
    transition: all 0.3s;
    background: transparent;
}

.share-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(201, 154, 59, 0.06);
}


/* ================================================================
   十七、首页特有样式（index.html）
   ================================================================ */

/* Hero 区域 */
.hero-section {
    background: linear-gradient(135deg, #0a1a12 0%, #1a3a2a 60%, #2a4a3a 100%);
    position: relative;
    overflow: hidden;
}

.hero-overlay {
    background: radial-gradient(circle at 30% 40%, rgba(201, 154, 59, 0.08) 0%, transparent 60%);
}

.hero-title {
    background: linear-gradient(to right, #f2efe8, #d4a54a);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.floating-circle {
    position: absolute;
    border-radius: 50%;
    background: rgba(201, 154, 59, 0.04);
    animation: float 12s infinite alternate ease-in-out;
    pointer-events: none;
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(30px, -30px) scale(1.1); }
}

/* 产品卡片（首页 & 产品列表） */
.product-card {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1),
                box-shadow 0.5s ease,
                border-color 0.3s;
    will-change: transform;
}

.product-card:hover {
    transform: translateY(-12px) scale(1.01);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.12);
    border-color: var(--accent);
}

.product-card .icon-wrap {
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    transition: transform 0.4s;
}

.product-card:hover .icon-wrap {
    transform: rotate(-6deg) scale(1.05);
}

.product-card img {
    transition: transform 0.7s ease;
}

.product-card:hover img {
    transform: scale(1.08);
}

/* 工厂卡片 */
.factory-card {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    transition: transform 0.4s, background 0.4s;
}

.factory-card:hover {
    transform: scale(1.03);
    background: rgba(255, 255, 255, 0.15);
}

/* 客户合影卡片 */
.customer-card {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 1.5rem;
    overflow: hidden;
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1),
                box-shadow 0.5s ease,
                border-color 0.3s;
}

.customer-card:hover {
    transform: translateY(-10px) scale(1.01);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.12);
    border-color: var(--accent);
}

.customer-card .img-wrap {
    position: relative;
    overflow: hidden;
    height: 260px;
}

.customer-card .img-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.7s ease;
}

.customer-card:hover .img-wrap img {
    transform: scale(1.06);
}

.customer-card .img-wrap .flag-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(6px);
    color: #fff;
    padding: 4px 14px;
    border-radius: 30px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.3px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    gap: 6px;
}

.customer-card .img-wrap .flag-badge i {
    color: var(--accent);
}

.customer-card .card-body {
    padding: 1.25rem 1.5rem 1.5rem;
}

.customer-card .card-body .quote {
    font-size: 0.95rem;
    color: #2d2d2d;
    line-height: 1.6;
    font-style: italic;
}

.customer-card .card-body .quote i {
    color: var(--accent);
    opacity: 0.5;
    font-size: 0.8rem;
}

.customer-card .card-body .customer-name {
    font-weight: 700;
    color: #0f1f17;
    margin-top: 0.5rem;
    font-size: 0.9rem;
}

.customer-card .card-body .customer-name span {
    font-weight: 400;
    color: #888;
    font-size: 0.8rem;
}


/* ================================================================
   十八、About 页特有样式（about.html）
   ================================================================ */

/* 时间线 */
.timeline-item {
    position: relative;
    padding-left: 2.5rem;
    padding-bottom: 2.5rem;
    border-left: 2px solid #d1d1d1;
}

.timeline-item:last-child {
    border-left: 2px solid transparent;
    padding-bottom: 0;
}

.timeline-item .dot {
    position: absolute;
    left: -0.6rem;
    top: 0;
    width: 1.2rem;
    height: 1.2rem;
    border-radius: 50%;
    background: var(--accent);
    border: 3px solid #f6f4ef;
    box-shadow: 0 0 0 2px var(--accent);
}

.timeline-item .year {
    font-weight: 700;
    color: var(--accent);
    font-size: 1.2rem;
}

/* 荣誉/证书卡片 */
.honor-card {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: transform 0.4s, box-shadow 0.4s;
}

.honor-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.08);
}

/* 团队成员卡片 */
.team-card {
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: transform 0.4s, box-shadow 0.4s;
}

.team-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
}


/* ================================================================
   十九、Contact 页特有样式（contact.html）
   ================================================================ */

/* 联系信息卡片 */
.info-card {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: transform 0.4s, box-shadow 0.4s;
}

.info-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.08);
}

/* FAQ 折叠 */
.faq-item {
    border-bottom: 1px solid #e5e5e5;
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-question {
    cursor: pointer;
    transition: color 0.3s;
}

.faq-question:hover {
    color: var(--accent);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
    padding: 0 1rem;
}

.faq-answer.open {
    max-height: 300px;
    padding: 1rem 1rem 1.5rem 1rem;
}

.faq-icon {
    transition: transform 0.4s;
}

.faq-icon.rotate {
    transform: rotate(180deg);
}

/* 地图占位 */
.map-placeholder {
    background: #1a3a2a;
    background-image: radial-gradient(circle at 30% 40%, rgba(201, 154, 59, 0.08) 0%, transparent 60%);
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #b3ad9e;
}


/* ================================================================
   二十、News 页特有样式（news.html）
   ================================================================ */

/* 新闻卡片 */
.news-card {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1),
                box-shadow 0.5s ease,
                border-color 0.3s;
    text-decoration: none;
    color: inherit;
    display: block;
}

.news-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
    border-color: var(--accent);
}

.news-card .img-wrap {
    position: relative;
    overflow: hidden;
}

.news-card .img-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.news-card:hover .img-wrap img {
    transform: scale(1.06);
}

.news-card .img-wrap .tag {
    position: absolute;
    top: 12px;
    left: 12px;
    display: inline-block;
    background: rgba(201, 154, 59, 0.9);
    color: #fff;
    font-size: 0.65rem;
    font-weight: 700;
    padding: 0.15rem 0.8rem;
    border-radius: 30px;
    letter-spacing: 0.3px;
    backdrop-filter: blur(4px);
}

.news-card .card-body {
    padding: 1.25rem 1.5rem 1.5rem;
}

.news-card .card-body .meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.75rem;
    color: #999;
    margin-bottom: 0.5rem;
}

.news-card .card-body .meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.news-card .card-body h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: #0f1f17;
    line-height: 1.4;
    margin-bottom: 0.5rem;
    transition: color 0.3s;
}

.news-card:hover .card-body h3 {
    color: var(--accent);
}

.news-card .card-body p {
    font-size: 0.9rem;
    color: #666;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-card .card-body .read-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 0.75rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent);
    transition: gap 0.3s;
}

.news-card:hover .card-body .read-more {
    gap: 12px;
}

.news-card .card-body .read-more i {
    transition: transform 0.3s;
}

.news-card:hover .card-body .read-more i {
    transform: translateX(4px);
}


/* ================================================================
   二十一、新闻详情页特有样式（news_detail.html）
   ================================================================ */

/* 相关新闻卡片 */
.related-card {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1),
                box-shadow 0.5s ease,
                border-color 0.3s;
    text-decoration: none;
    color: inherit;
    display: block;
}

.related-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.08);
    border-color: var(--accent);
}

.related-card img {
    transition: transform 0.6s ease;
}

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

/* 文章内容样式 */
.article-content h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #0f1f17;
    margin-top: 1.8rem;
    margin-bottom: 0.8rem;
}

.article-content h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #0f1f17;
    margin-top: 1.4rem;
    margin-bottom: 0.6rem;
}

.article-content p {
    color: #4a4a4a;
    line-height: 1.8;
    margin-bottom: 1rem;
}

.article-content ul,
.article-content ol {
    color: #4a4a4a;
    line-height: 1.8;
    padding-left: 1.5rem;
    margin-bottom: 1rem;
}

.article-content blockquote {
    border-left: 4px solid var(--accent);
    padding: 1rem 1.5rem;
    background: rgba(201, 154, 59, 0.06);
    border-radius: 0 0.5rem 0.5rem 0;
    margin: 1.5rem 0;
    font-style: italic;
    color: #4a4a4a;
}


/* ================================================================
   二十二、产品详情页特有样式（product_detail.html）
   ================================================================ */

/* 图片缩略图 */
.thumb-img {
    border: 2px solid transparent;
    transition: border-color 0.3s, transform 0.3s;
    cursor: pointer;
}

.thumb-img:hover {
    border-color: var(--accent);
    transform: scale(1.03);
}

.thumb-img.active {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.main-image-wrap {
    overflow: hidden;
    border-radius: 1.5rem;
}

.main-image-wrap img {
    transition: transform 0.6s ease;
}

.main-image-wrap:hover img {
    transform: scale(1.04);
}

/* 规格表格 */
.spec-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid #e5e5e5;
}

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

.spec-table .label {
    font-weight: 600;
    color: #0f1f17;
    background: #f1f0eb;
    width: 40%;
}

/* 相关产品卡片（与 related-card 共用，但保留独立定义以防冲突） */
/* 已在上方定义 .related-card，此处复用 */


/* ================================================================
   二十三、404 页面特有样式（404.html）
   ================================================================ */

/* 浮动拖拉机图标 */
.floating-tractor {
    animation: floatTractor 6s ease-in-out infinite;
    display: inline-block;
    color: var(--accent);
    font-size: 7rem;
    opacity: 0.15;
    position: absolute;
    pointer-events: none;
}

.floating-tractor.t1 {
    top: 10%;
    left: 5%;
    animation-delay: 0s;
    font-size: 5rem;
    opacity: 0.08;
}

.floating-tractor.t2 {
    bottom: 15%;
    right: 8%;
    animation-delay: 2s;
    font-size: 6rem;
    opacity: 0.1;
}

.floating-tractor.t3 {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 1s;
    font-size: 20rem;
    opacity: 0.03;
}

@keyframes floatTractor {
    0%, 100% { transform: translateY(0) rotate(-2deg); }
    50% { transform: translateY(-20px) rotate(2deg); }
}

/* 404 数字动画 */
.error-404 {
    font-size: 10rem;
    font-weight: 800;
    line-height: 1;
    background: linear-gradient(135deg, #0f1f17 0%, #1a3a2a 40%, #c99a3b 80%, #d4a54a 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    background-size: 200% 200%;
    animation: gradientShift 4s ease-in-out infinite;
    position: relative;
    display: inline-block;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

/* 404 数字逐字弹跳 */
.error-404 .digit {
    display: inline-block;
    animation: digitBounce 2s ease-in-out infinite;
}

.error-404 .digit:nth-child(1) { animation-delay: 0s; }
.error-404 .digit:nth-child(2) { animation-delay: 0.2s; }
.error-404 .digit:nth-child(3) { animation-delay: 0.4s; }

@keyframes digitBounce {
    0%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-15px); }
}

/* 404 文字打字效果 */
.typewriter {
    overflow: hidden;
    border-right: 3px solid var(--accent);
    white-space: nowrap;
    margin: 0 auto;
    letter-spacing: 0.1em;
    animation: typing 2s steps(30, end) forwards, blink-caret 0.75s step-end infinite;
    width: 0;
    display: inline-block;
}

@keyframes typing {
    from { width: 0; }
    to { width: 100%; }
}

@keyframes blink-caret {
    from, to { border-color: transparent; }
    50% { border-color: var(--accent); }
}

/* 404 小图标旋转 */
.spin-icon {
    animation: spinSlow 8s linear infinite;
    display: inline-block;
}

@keyframes spinSlow {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.animate-fadeInUp {
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}


/* ================================================================
   二十四、Sitemap 页面特有样式（sitemap.html）
   ================================================================ */

/* 统计卡片 */
.stat-card {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 1rem;
    padding: 1.5rem;
    text-align: center;
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.08);
}

.stat-card .number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent);
    font-variant-numeric: tabular-nums;
}

.stat-card .label {
    font-size: 0.8rem;
    color: #888;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 0.25rem;
}

/* Sitemap 区块 */
.sitemap-section {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 1.25rem;
    padding: 1.5rem;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.sitemap-section:hover {
    border-color: var(--accent);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.06);
}

.sitemap-section .section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    padding: 0.25rem 0;
    user-select: none;
}

.sitemap-section .section-header h2 {
    font-size: 1.15rem;
    font-weight: 700;
    color: #0f1f17;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.sitemap-section .section-header h2 i {
    color: var(--accent);
}

.sitemap-section .section-header .toggle-icon {
    transition: transform 0.4s ease;
    color: var(--accent);
    font-size: 1rem;
}

.sitemap-section .section-header .toggle-icon.collapsed {
    transform: rotate(-90deg);
}

.sitemap-section .section-body {
    overflow: hidden;
    max-height: 2000px;
    transition: max-height 0.5s ease, padding 0.4s ease, opacity 0.3s ease;
    padding-top: 1rem;
    opacity: 1;
}

.sitemap-section .section-body.hidden {
    max-height: 0;
    padding-top: 0;
    opacity: 0;
}

.sitemap-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.25rem;
}

.sitemap-section ul li {
    padding: 0.35rem 0.75rem;
    border-radius: 0.5rem;
    transition: background 0.2s, transform 0.2s;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.25rem 0.75rem;
}

.sitemap-section ul li:hover {
    background: rgba(201, 154, 59, 0.06);
    transform: translateX(4px);
}

.sitemap-section ul li a {
    color: #1a3a2a;
    text-decoration: none;
    transition: color 0.2s;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.sitemap-section ul li a:hover {
    color: var(--accent);
}

.sitemap-section ul li a i {
    color: var(--accent);
    font-size: 0.75rem;
    opacity: 0.5;
}

.sitemap-section ul li .badge {
    font-size: 0.6rem;
    background: rgba(201, 154, 59, 0.12);
    color: var(--accent);
    padding: 0.1rem 0.6rem;
    border-radius: 30px;
    font-weight: 600;
    white-space: nowrap;
}

.sitemap-section ul li .date {
    font-size: 0.65rem;
    color: #999;
    white-space: nowrap;
}

/* 搜索框 */
.search-box {
    position: relative;
    max-width: 400px;
    margin: 0 auto 2rem;
}

.search-box input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 3rem;
    border: 2px solid rgba(0, 0, 0, 0.06);
    border-radius: 3rem;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(4px);
    font-size: 0.95rem;
    transition: all 0.3s;
    outline: none;
    color: #1e1e1c;
}

.search-box input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px var(--accent-glow);
    background: white;
}

.search-box input::placeholder {
    color: #aaa;
}

.search-box .search-icon {
    position: absolute;
    left: 1.2rem;
    top: 50%;
    transform: translateY(-50%);
    color: #aaa;
    font-size: 1rem;
}

.search-box .clear-btn {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: #ccc;
    cursor: pointer;
    font-size: 0.9rem;
    padding: 0.25rem 0.5rem;
    display: none;
}

.search-box .clear-btn.visible {
    display: block;
}

.search-box .clear-btn:hover {
    color: var(--accent);
}

/* 无结果提示 */
.no-results {
    display: none;
    text-align: center;
    padding: 2rem;
    color: #999;
}

.no-results.visible {
    display: block;
}

.no-results i {
    font-size: 2.5rem;
    color: var(--accent);
    opacity: 0.3;
    margin-bottom: 0.5rem;
}


/* ================================================================
   二十五、响应式（所有页面统一）
   ================================================================ */

@media (max-width: 640px) {

    /* 导航 & 全局 */
    .hero-title {
        font-size: 2.4rem;
    }

    /* 404 页面 */
    .error-404 {
        font-size: 6rem;
    }
    .floating-tractor.t3 {
        font-size: 12rem;
    }
    .floating-tractor.t1 {
        font-size: 3rem;
    }
    .floating-tractor.t2 {
        font-size: 4rem;
    }
    .typewriter {
        white-space: normal;
        border-right: none;
        animation: none;
        width: auto;
    }

    /* About 页面 */
    .timeline-item {
        padding-left: 1.8rem;
    }

    /* Contact 页面 */
    .info-card {
        padding: 1.25rem;
    }

    /* News 页面 */
    .filter-btn {
        padding: 0.25rem 1rem;
        font-size: 0.8rem;
    }

    /* News Detail 页面 */
    .article-content h2 {
        font-size: 1.3rem;
    }
    .prev-next-nav {
        flex-direction: column;
    }
    .prev-next-nav a {
        min-width: unset;
    }
    .prev-next-nav a.next-link {
        justify-content: flex-start;
    }

    /* Product Detail 页面 */
    .spec-table .label {
        width: 50%;
    }

    /* Products 页面 */
    .filter-btn {
        padding: 0.3rem 1rem;
        font-size: 0.8rem;
    }

    /* Sitemap 页面 */
    .sitemap-section ul li {
        flex-direction: column;
        align-items: flex-start;
    }
    .sitemap-section ul li .badge {
        font-size: 0.55rem;
    }
    .stat-card .number {
        font-size: 1.8rem;
    }

    /* 客户合影 */
    .customer-card .img-wrap {
        height: 200px;
    }

    /* 浮动按钮 - 手机适配 */
    .whatsapp-float {
        bottom: 20px;
        right: 16px;
    }
    .whatsapp-float .wa-btn {
        width: 54px;
        height: 54px;
        font-size: 28px;
    }
    .whatsapp-float .wa-label {
        font-size: 10px;
        padding: 4px 12px;
    }
    .back-to-top {
        bottom: 90px;
        right: 16px;
        width: 42px;
        height: 42px;
        font-size: 16px;
    }
}