/* ============================================================
   镒凯精密 - 国际化高端工业制造网站
   设计风格：德国/日本高端制造企业风，天蓝色主题
   ============================================================ */

/* ---------- CSS Reset & Variables ---------- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    /* 天蓝色系 */
    --primary: #0284c7;
    --primary-light: #0ea5e9;
    --primary-lighter: #38bdf8;
    --primary-dark: #0369a1;
    --primary-darker: #075985;
    --primary-50: #f0f9ff;
    --primary-100: #e0f2fe;

    /* 中性色 */
    --dark: #0a1628;
    --dark-2: #0f1e35;
    --gray-900: #1a2740;
    --gray-800: #283650;
    --gray-700: #3d4f6e;
    --gray-600: #566885;
    --gray-500: #7a8aa3;
    --gray-400: #9fb0c8;
    --gray-300: #c8d3e2;
    --gray-200: #e2e9f2;
    --gray-100: #f0f4f9;
    --gray-50: #f7f9fc;
    --white: #ffffff;

    /* 功能色 */
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;

    /* 排版 */
    --font-sans: 'Inter', 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Inter', 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', sans-serif;

    /* 间距 */
    --section-padding: 70px;
    --container-max: 1440px;
    --container-padding: 32px;

    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* 阴影 */
    --shadow-sm: 0 1px 3px rgba(10, 22, 40, 0.06);
    --shadow-md: 0 4px 16px rgba(10, 22, 40, 0.08);
    --shadow-lg: 0 12px 40px rgba(10, 22, 40, 0.12);
    --shadow-xl: 0 24px 64px rgba(10, 22, 40, 0.16);

    /* 过渡 */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.7;
    color: var(--gray-700);
    background: var(--white);
    overflow-x: hidden;
    padding-top: 130px;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--primary); }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea, select { font-family: inherit; font-size: inherit; }

/* ---------- 容器 ---------- */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.container-wide {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 40px;
}

/* ---------- 通用排版 ---------- */
.section-label {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--primary);
    margin-bottom: 20px;
}
.section-label::before {
    content: '';
    width: 32px;
    height: 2px;
    background: var(--primary);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(32px, 4vw, 52px);
    font-weight: 700;
    line-height: 1.15;
    color: var(--dark);
    letter-spacing: -0.02em;
    margin-bottom: 24px;
}

.section-subtitle {
    font-size: 18px;
    line-height: 1.7;
    color: var(--gray-600);
    max-width: 640px;
}

.text-center { text-align: center; }
.text-center .section-label { justify-content: center; }
.text-center .section-subtitle { margin-left: auto; margin-right: auto; }

/* ---------- 按钮 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 16px 36px;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.02em;
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
    cursor: pointer;
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--primary);
    color: var(--white);
    border: 2px solid var(--primary);
}
.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(2, 132, 199, 0.35);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255,255,255,0.5);
}
.btn-outline:hover {
    background: var(--white);
    color: var(--dark);
    border-color: var(--white);
}

.btn-outline-dark {
    background: transparent;
    color: var(--dark);
    border: 2px solid var(--gray-300);
}
.btn-outline-dark:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.btn-lg { padding: 20px 48px; font-size: 16px; }
.btn-sm { padding: 10px 24px; font-size: 14px; }

.btn-arrow::after {
    content: '\2192';
    font-size: 18px;
    transition: transform var(--transition-base);
}
.btn-arrow:hover::after { transform: translateX(4px); }

/* ---------- 顶部信息栏 ---------- */
.topbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1001;
    background: var(--dark);
    color: var(--gray-400);
    font-size: 13px;
    padding: 10px 0;
    border-bottom: none;
}
.topbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.topbar-info { display: flex; gap: 32px; }
.topbar-info span { display: flex; align-items: center; gap: 8px; }
.topbar-info .icon {
    width: 14px; height: 14px;
    display: inline-flex; align-items: center; justify-content: center;
    color: var(--primary-lighter);
}
.topbar-lang { display: flex; gap: 16px; }
.topbar-lang a {
    color: var(--gray-500);
    font-weight: 500;
    padding: 2px 0;
    border-bottom: 1px solid transparent;
}
.topbar-lang a.active, .topbar-lang a:hover {
    color: var(--primary-lighter);
    border-bottom-color: var(--primary-lighter);
}

/* ---------- 导航栏 ---------- */
.header {
    position: fixed;
    top: 42px; left: 0; right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: all var(--transition-base);
    padding: 0;
}
.header.scrolled {
    box-shadow: var(--shadow-md);
    border-bottom-color: var(--gray-200);
}
.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 88px;
    transition: height var(--transition-base);
}
.header.scrolled .container { height: 72px; }

.logo { display: flex; align-items: center; gap: 14px; }
.logo img { height: 36px; width: auto; object-fit: contain; }
.logo-text { display: flex; flex-direction: column; line-height: 1.2; }
.logo-brand {
    font-size: 20px;
    font-weight: 800;
    color: var(--dark);
    letter-spacing: -0.01em;
}
.logo-sub {
    font-size: 11px;
    font-weight: 500;
    color: var(--gray-500);
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.nav-menu { display: flex; align-items: center; gap: 8px; }
.nav-menu > li { position: relative; }
.nav-menu > li > a {
    display: block;
    padding: 12px 20px;
    font-size: 15px;
    font-weight: 500;
    color: var(--gray-800);
    position: relative;
    transition: color var(--transition-fast);
}
.nav-menu > li > a::after {
    content: '';
    position: absolute;
    bottom: 4px; left: 50%;
    width: 0; height: 2px;
    background: var(--primary);
    transition: all var(--transition-base);
    transform: translateX(-50%);
}
.nav-menu > li:hover > a,
.nav-menu > li.active > a {
    color: var(--primary);
}
.nav-menu > li:hover > a::after,
.nav-menu > li.active > a::after {
    width: 24px;
}

/* 下拉菜单 */
.dropdown {
    position: absolute;
    top: 100%; left: 0;
    min-width: 240px;
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    padding: 12px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px);
    transition: all var(--transition-base);
    border: 1px solid var(--gray-100);
}
.nav-menu > li:hover .dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.dropdown a {
    display: block;
    padding: 12px 24px;
    font-size: 14px;
    color: var(--gray-700);
    transition: all var(--transition-fast);
}
.dropdown a:hover {
    background: var(--primary-50);
    color: var(--primary);
    padding-left: 28px;
}

.header-actions { display: flex; align-items: center; gap: 20px; }

/* 导航栏语言切换 */
.header-lang {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
}
.header-lang a {
    color: var(--gray-500);
    transition: color var(--transition-fast);
}
.header-lang a:hover,
.header-lang a.active {
    color: var(--primary);
}
.header-lang .sep {
    color: var(--gray-300);
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}
.mobile-toggle span {
    width: 24px; height: 2px;
    background: var(--dark);
    transition: all var(--transition-base);
}

/* ---------- Hero 全屏 ---------- */
.hero {
    position: relative;
    height: 100vh;
    min-height: 680px;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: var(--dark);
}
.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}
.hero-bg img {
    width: 100%; height: 100%;
    object-fit: cover;
    animation: heroZoom 20s ease-in-out infinite alternate;
}
@keyframes heroZoom {
    from { transform: scale(1); }
    to { transform: scale(1.08); }
}
.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(10,22,40,0.85) 0%, rgba(10,22,40,0.5) 50%, rgba(2,132,199,0.3) 100%);
    z-index: 1;
}
.hero-content {
    position: relative;
    z-index: 2;
    max-width: 760px;
}
.hero-label {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 8px 20px;
    background: rgba(2,132,199,0.15);
    border: 1px solid rgba(56,189,248,0.3);
    border-radius: 100px;
    font-size: 13px;
    font-weight: 600;
    color: var(--primary-lighter);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 32px;
    animation: fadeInUp 0.8s ease-out;
}
.hero-label .dot {
    width: 8px; height: 8px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(1.3); }
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(40px, 6vw, 72px);
    font-weight: 800;
    line-height: 1.08;
    color: var(--white);
    letter-spacing: -0.03em;
    margin-bottom: 28px;
    animation: fadeInUp 0.8s ease-out 0.15s both;
}
.hero-title .highlight {
    background: linear-gradient(135deg, var(--primary-lighter), var(--primary-100));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-desc {
    font-size: 19px;
    line-height: 1.7;
    color: rgba(255,255,255,0.75);
    margin-bottom: 44px;
    max-width: 580px;
    animation: fadeInUp 0.8s ease-out 0.3s both;
}
.hero-actions {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease-out 0.45s both;
}

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

/* Hero 底部统计 */
.hero-stats {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    z-index: 2;
    border-top: 1px solid rgba(255,255,255,0.1);
    background: rgba(10,22,40,0.4);
    backdrop-filter: blur(10px);
}
.hero-stats .container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    padding-top: 28px;
    padding-bottom: 28px;
}
.hero-stat {
    padding: 0 24px;
    border-left: 1px solid rgba(255,255,255,0.1);
}
.hero-stat:first-child { border-left: none; }
.hero-stat-num {
    font-size: 36px;
    font-weight: 800;
    color: var(--white);
    line-height: 1;
    margin-bottom: 6px;
}
.hero-stat-num .unit { font-size: 18px; color: var(--primary-lighter); margin-left: 4px; }
.hero-stat-label {
    font-size: 13px;
    color: rgba(255,255,255,0.6);
    letter-spacing: 0.05em;
}

/* 滚动提示 */
.scroll-indicator {
    position: absolute;
    bottom: 120px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: rgba(255,255,255,0.5);
    font-size: 11px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
}
.scroll-indicator .line {
    width: 1px; height: 40px;
    background: linear-gradient(to bottom, rgba(255,255,255,0.5), transparent);
    animation: scrollLine 2s ease-in-out infinite;
}
@keyframes scrollLine {
    0% { transform: scaleY(0); transform-origin: top; }
    50% { transform: scaleY(1); transform-origin: top; }
    51% { transform: scaleY(1); transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ---------- 通用 Section ---------- */
.section {
    padding: var(--section-padding) 0;
    position: relative;
}
.section-alt { background: var(--gray-50); }

/* 天蓝色装饰背景 */
.section-decor {
    position: relative;
    overflow: hidden;
}
.section-decor::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(14,165,233,0.08) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}
.section-decor::after {
    content: '';
    position: absolute;
    bottom: -80px;
    left: -80px;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(2,132,199,0.06) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}
.section-decor .container {
    position: relative;
    z-index: 1;
}
.section-dark {
    background: var(--dark);
    color: rgba(255,255,255,0.7);
}
.section-dark .section-title { color: var(--white); }
.section-dark .section-label { color: var(--primary-lighter); }
.section-dark .section-subtitle { color: rgba(255,255,255,0.6); }

/* ---------- 关于/介绍 Section ---------- */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}
.about-image {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
}
.about-image img {
    width: 100%; height: 560px;
    object-fit: cover;
    transition: transform var(--transition-slow);
}
.about-image:hover img { transform: scale(1.05); }
.about-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 60%, rgba(2,132,199,0.2));
}
.about-badge {
    position: absolute;
    bottom: 32px; left: 32px;
    background: var(--white);
    padding: 24px 32px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 20px;
    z-index: 2;
}
.about-badge-num {
    font-size: 48px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
}
.about-badge-text {
    font-size: 14px;
    color: var(--gray-600);
    line-height: 1.4;
}
.about-badge-text strong { display: block; color: var(--dark); font-size: 16px; margin-bottom: 2px; }

.about-features { margin-top: 40px; display: grid; gap: 20px; }
.about-feature {
    display: flex;
    gap: 20px;
    padding: 20px 0;
    border-bottom: 1px solid var(--gray-200);
}
.about-feature:last-child { border-bottom: none; }
.about-feature-icon {
    flex-shrink: 0;
    width: 52px; height: 52px;
    background: var(--primary-50);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    font-weight: 800;
    color: var(--primary);
}
.about-feature h4 {
    font-size: 17px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 6px;
}
.about-feature p {
    font-size: 14px;
    color: var(--gray-600);
    line-height: 1.6;
}

/* ---------- 品质保障 ---------- */
.quality-features {
    margin-top: 32px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}
.quality-feature {
    display: flex;
    gap: 18px;
    align-items: flex-start;
}
.quality-feature-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: 800;
    color: var(--white);
    box-shadow: 0 4px 12px rgba(2,132,199,0.3);
}
.quality-feature h4 {
    font-size: 17px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 6px;
}
.quality-feature p {
    font-size: 14px;
    color: var(--gray-600);
    line-height: 1.6;
}

/* 认证徽章 */
.quality-cert-badges {
    position: absolute;
    bottom: 24px;
    left: 24px;
    right: 24px;
    display: flex;
    gap: 12px;
    justify-content: center;
}
.cert-badge {
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-md);
    padding: 14px 20px;
    text-align: center;
    box-shadow: var(--shadow-md);
    flex: 1;
    max-width: 120px;
}
.cert-badge-num {
    font-size: 18px;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: -0.02em;
}
.cert-badge-text {
    font-size: 11px;
    color: var(--gray-600);
    font-weight: 600;
    margin-top: 2px;
}

/* ---------- 产品展示 ---------- */
.products-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 48px;
    gap: 40px;
}
.products-header > div:first-child {
    text-align: left;
}
.products-header-center {
    justify-content: center;
    text-align: center;
}
.products-footer {
    display: flex;
    justify-content: flex-end;
    margin-top: 48px;
}
.btn-nowrap {
    white-space: nowrap;
}

/* 标题不换行 */
.section-title-nowrap {
    white-space: nowrap;
    flex-shrink: 0;
    font-size: clamp(28px, 3.5vw, 44px);
}

/* 核心能力副标题不换行 */
.capability-subtitle {
    white-space: nowrap;
    max-width: 100%;
}
.products-filters {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}
.filter-btn {
    padding: 10px 24px;
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-600);
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 100px;
    transition: all var(--transition-fast);
}
.filter-btn:hover { color: var(--primary); border-color: var(--primary); }
.filter-btn.active {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.product-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    border: 1px solid var(--gray-100);
}
.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}
.product-card-image {
    position: relative;
    height: 280px;
    overflow: hidden;
    background: var(--gray-100);
}
.product-card-image img {
    width: 100%; height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}
.product-card:hover .product-card-image img { transform: scale(1.08); }
.product-card-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(10,22,40,0.6), transparent 50%);
    opacity: 0;
    transition: opacity var(--transition-base);
    display: flex;
    align-items: flex-end;
    padding: 24px;
}
.product-card:hover .product-card-overlay { opacity: 1; }
.product-card-overlay .btn { padding: 12px 28px; font-size: 14px; }

.product-card-body { padding: 28px; }
.product-card-cat {
    font-size: 12px;
    font-weight: 600;
    color: var(--primary);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 10px;
}
.product-card-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 12px;
    line-height: 1.3;
}
.product-card-desc {
    font-size: 14px;
    color: var(--gray-600);
    line-height: 1.6;
    margin-bottom: 20px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.product-card-meta {
    display: flex;
    gap: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--gray-100);
}
.product-card-meta span {
    font-size: 12px;
    color: var(--gray-500);
    display: flex;
    align-items: center;
    gap: 6px;
}

/* ---------- 优势/能力 ---------- */
.capabilities-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 60px;
}
.capability-card {
    padding: 40px 32px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}
.capability-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}
.capability-card:hover {
    background: rgba(255,255,255,0.07);
    border-color: rgba(56,189,248,0.3);
    transform: translateY(-4px);
}
.capability-card:hover::before { transform: scaleX(1); }
.capability-num {
    font-size: 48px;
    font-weight: 800;
    color: rgba(56,189,248,0.2);
    line-height: 1;
    margin-bottom: 20px;
}
.capability-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 12px;
}
.capability-card p {
    font-size: 14px;
    color: rgba(255,255,255,0.55);
    line-height: 1.7;
}

/* ---------- 核心能力 - 图文叠加卡片 ---------- */
.capabilities-image-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 60px;
}
.capability-image-card {
    position: relative;
    height: 380px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    transition: all var(--transition-base);
}
.capability-image-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
}
.capability-image-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}
.capability-image-card:hover img {
    transform: scale(1.08);
}
.capability-image-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(10,22,40,0.92) 0%, rgba(10,22,40,0.5) 45%, transparent 70%);
    transition: background var(--transition-base);
}
.capability-image-card:hover .capability-image-overlay {
    background: linear-gradient(to top, rgba(2,132,199,0.9) 0%, rgba(10,22,40,0.6) 45%, transparent 70%);
}
.capability-image-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 32px 28px;
    color: var(--white);
    z-index: 2;
}
.capability-image-content h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 10px;
    letter-spacing: -0.01em;
}
.capability-image-content p {
    font-size: 14px;
    line-height: 1.65;
    color: rgba(255,255,255,0.85);
    min-height: 48px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ---------- 工艺流程 ---------- */
.process-section { background: var(--gray-50); }
.process-steps {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 0;
    margin-top: 60px;
    position: relative;
}
.process-step {
    text-align: center;
    padding: 40px 24px;
    position: relative;
}
.process-step::after {
    content: '';
    position: absolute;
    top: 64px; right: -50%;
    width: 100%;
    height: 2px;
    background: var(--gray-200);
    z-index: 0;
}
.process-step:last-child::after { display: none; }
.process-step-num {
    width: 56px; height: 56px;
    background: var(--white);
    border: 2px solid var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 800;
    color: var(--primary);
    margin: 0 auto 24px;
    position: relative;
    z-index: 1;
    transition: all var(--transition-base);
}
.process-step:hover .process-step-num {
    background: var(--primary);
    color: var(--white);
    transform: scale(1.1);
}
.process-step h4 {
    font-size: 17px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
}
.process-step p {
    font-size: 13px;
    color: var(--gray-500);
    line-height: 1.6;
}

/* ---------- CTA 区块 ---------- */
.cta-section {
    position: relative;
    padding: 100px 0;
    overflow: hidden;
    background: var(--dark);
}
.cta-bg {
    position: absolute;
    inset: 0;
    opacity: 0.15;
}
.cta-bg img { width: 100%; height: 100%; object-fit: cover; }
.cta-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}
.cta-content h2 {
    font-size: clamp(28px, 3.5vw, 42px);
    font-weight: 800;
    color: var(--white);
    margin-bottom: 20px;
    line-height: 1.2;
    white-space: nowrap;
}
.cta-content p {
    font-size: 18px;
    color: rgba(255,255,255,0.65);
    margin-bottom: 40px;
}

/* ---------- 页脚 ---------- */
.footer {
    background: var(--dark);
    color: rgba(255,255,255,0.6);
    padding-top: 80px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
    gap: 60px;
    padding-bottom: 60px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand .logo { margin-bottom: 24px; }
.footer-brand .logo-brand { color: var(--white); }
.footer-brand .logo-sub { color: rgba(255,255,255,0.4); }
.footer-brand p {
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 24px;
    max-width: 320px;
}
.footer-social { display: flex; gap: 12px; }
.footer-social a {
    width: 40px; height: 40px;
    background: rgba(255,255,255,0.06);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.6);
    font-size: 14px;
    font-weight: 700;
    transition: all var(--transition-fast);
}
.footer-social a:hover {
    background: var(--primary);
    color: var(--white);
    transform: translateY(-2px);
}

.footer-col h4 {
    font-size: 15px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 24px;
    letter-spacing: 0.05em;
}
.footer-col ul li { margin-bottom: 14px; }
.footer-col ul a {
    font-size: 14px;
    color: rgba(255,255,255,0.55);
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.footer-col ul a::before {
    content: '';
    width: 0; height: 1px;
    background: var(--primary-lighter);
    transition: width var(--transition-fast);
}
.footer-col ul a:hover {
    color: var(--primary-lighter);
    padding-left: 4px;
}
.footer-col ul a:hover::before { width: 12px; }

.footer-contact li {
    display: flex;
    gap: 14px;
    margin-bottom: 18px;
    font-size: 14px;
    line-height: 1.6;
}
.footer-contact .icon {
    flex-shrink: 0;
    width: 36px; height: 36px;
    background: rgba(2,132,199,0.15);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-lighter);
    font-size: 14px;
    font-weight: 700;
}
.footer-contact strong { display: block; color: var(--white); font-size: 13px; margin-bottom: 2px; }

.footer-bottom {
    padding: 28px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: rgba(255,255,255,0.4);
}
.footer-bottom-links { display: flex; gap: 24px; }
.footer-bottom-links a:hover { color: var(--primary-lighter); }

/* ---------- 在线客服 ---------- */
.chat-widget {
    position: fixed;
    bottom: 32px; right: 32px;
    z-index: 999;
}
.chat-toggle {
    width: 64px; height: 64px;
    background: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 26px;
    font-weight: 700;
    box-shadow: 0 8px 32px rgba(2,132,199,0.4);
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
}
.chat-toggle:hover {
    transform: scale(1.1);
    box-shadow: 0 12px 40px rgba(2,132,199,0.5);
}
.chat-toggle::before,
.chat-toggle::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 50%;
    border: 2px solid var(--primary);
    animation: breathe 2.5s ease-out infinite;
}
.chat-toggle::after { animation-delay: 1.25s; }
@keyframes breathe {
    0% { transform: scale(1); opacity: 0.8; }
    100% { transform: scale(1.8); opacity: 0; }
}
.chat-prompt {
    position: absolute;
    right: 80px; top: 50%;
    transform: translateY(-50%);
    background: var(--white);
    padding: 12px 20px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    font-size: 14px;
    font-weight: 600;
    color: var(--dark);
    white-space: nowrap;
    animation: promptFloat 3s ease-in-out infinite;
}
.chat-prompt::after {
    content: '';
    position: absolute;
    right: -6px; top: 50%;
    transform: translateY(-50%) rotate(45deg);
    width: 12px; height: 12px;
    background: var(--white);
}
@keyframes promptFloat {
    0%, 100% { transform: translateY(-50%) translateX(0); }
    50% { transform: translateY(-50%) translateX(-6px); }
}

.chat-panel {
    position: absolute;
    bottom: 80px; right: 0;
    width: 380px;
    height: 520px;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px) scale(0.95);
    transition: all var(--transition-base);
}
.chat-panel.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}
.chat-header {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    padding: 20px 24px;
    color: var(--white);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.chat-header-info { display: flex; align-items: center; gap: 14px; }
.chat-avatar {
    width: 44px; height: 44px;
    background: rgba(255,255,255,0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
}
.chat-header-name { font-size: 16px; font-weight: 700; }
.chat-header-status {
    font-size: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
    opacity: 0.9;
}
.chat-header-status .dot {
    width: 8px; height: 8px;
    background: var(--success);
    border-radius: 50%;
}
.chat-close {
    width: 32px; height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.8);
    font-size: 20px;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}
.chat-close:hover { background: rgba(255,255,255,0.15); color: var(--white); }

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    background: var(--gray-50);
}
.chat-msg {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    animation: msgIn 0.3s ease-out;
}
@keyframes msgIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}
.chat-msg.visitor { flex-direction: row-reverse; }
.chat-msg-avatar {
    flex-shrink: 0;
    width: 32px; height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
}
.chat-msg.agent .chat-msg-avatar { background: var(--primary-100); color: var(--primary); }
.chat-msg.visitor .chat-msg-avatar { background: var(--gray-200); color: var(--gray-600); }
.chat-msg-bubble {
    max-width: 75%;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    font-size: 14px;
    line-height: 1.6;
    word-break: break-word;
}
.chat-msg.agent .chat-msg-bubble {
    background: var(--white);
    color: var(--gray-700);
    border-top-left-radius: 4px;
    box-shadow: var(--shadow-sm);
}
.chat-msg.visitor .chat-msg-bubble {
    background: var(--primary);
    color: var(--white);
    border-top-right-radius: 4px;
}

.chat-quick-replies {
    padding: 12px 24px;
    background: var(--white);
    border-top: 1px solid var(--gray-100);
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}
.chat-quick-reply {
    padding: 6px 14px;
    font-size: 12px;
    color: var(--primary);
    background: var(--primary-50);
    border: 1px solid var(--primary-100);
    border-radius: 100px;
    transition: all var(--transition-fast);
}
.chat-quick-reply:hover { background: var(--primary); color: var(--white); }

.chat-input-area {
    padding: 16px 24px;
    background: var(--white);
    border-top: 1px solid var(--gray-100);
    display: flex;
    gap: 12px;
    align-items: flex-end;
}
.chat-input-area textarea {
    flex: 1;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: 10px 14px;
    font-size: 14px;
    resize: none;
    height: 44px;
    outline: none;
    transition: border-color var(--transition-fast);
}
.chat-input-area textarea:focus { border-color: var(--primary); }
.chat-send {
    width: 44px; height: 44px;
    background: var(--primary);
    color: var(--white);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}
.chat-send:hover { background: var(--primary-dark); }

.chat-unread {
    position: absolute;
    top: -4px; right: -4px;
    min-width: 20px; height: 20px;
    background: var(--danger);
    color: var(--white);
    font-size: 11px;
    font-weight: 700;
    border-radius: 100px;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 0 6px;
}

/* ---------- Cookie 弹窗 ---------- */
.cookie-banner {
    position: fixed;
    bottom: 32px; left: 32px;
    max-width: 420px;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    padding: 28px;
    z-index: 998;
    transform: translateY(120%);
    transition: transform var(--transition-slow);
    border-left: 4px solid var(--primary);
}
.cookie-banner.active { transform: translateY(0); }
.cookie-banner h4 {
    font-size: 17px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 10px;
}
.cookie-banner p {
    font-size: 13px;
    color: var(--gray-600);
    line-height: 1.6;
    margin-bottom: 20px;
}
.cookie-banner p a { color: var(--primary); text-decoration: underline; }
.cookie-actions { display: flex; gap: 12px; }
.cookie-accept {
    flex: 1;
    padding: 12px;
    background: var(--primary);
    color: var(--white);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    transition: all var(--transition-fast);
}
.cookie-accept:hover { background: var(--primary-dark); }
.cookie-decline {
    padding: 12px 20px;
    color: var(--gray-500);
    font-size: 14px;
    font-weight: 500;
    transition: color var(--transition-fast);
}
.cookie-decline:hover { color: var(--gray-700); }

/* ---------- 页面头部 Banner（内页） ---------- */
.page-hero {
    position: relative;
    height: 420px;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: var(--dark);
    margin-top: 88px;
}
.page-hero-bg { position: absolute; inset: 0; }
.page-hero-bg img { width: 100%; height: 100%; object-fit: cover; }
.page-hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(10,22,40,0.88), rgba(2,132,199,0.4));
}
.page-hero-content { position: relative; z-index: 1; }
.page-hero-breadcrumb {
    display: flex;
    gap: 12px;
    font-size: 14px;
    color: rgba(255,255,255,0.6);
    margin-bottom: 20px;
}
.page-hero-breadcrumb a { color: rgba(255,255,255,0.6); }
.page-hero-breadcrumb a:hover { color: var(--primary-lighter); }
.page-hero-breadcrumb .sep { opacity: 0.4; }
.page-hero-title {
    font-size: clamp(36px, 5vw, 56px);
    font-weight: 800;
    color: var(--white);
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}
.page-hero-desc {
    font-size: 18px;
    color: rgba(255,255,255,0.7);
    max-width: 600px;
}

/* ---------- 产品详情页 ---------- */
.product-detail { padding: 80px 0; }
.product-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    margin-bottom: 80px;
}
.product-gallery-main {
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 20px;
    background: var(--gray-100);
}
.product-gallery-main img {
    width: 100%; height: 480px;
    object-fit: cover;
}
.product-gallery-thumbs {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}
.product-thumb {
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all var(--transition-fast);
}
.product-thumb.active { border-color: var(--primary); }
.product-thumb img { width: 100%; height: 80px; object-fit: cover; }

.product-info h1 {
    font-size: 36px;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 12px;
    line-height: 1.2;
}
.product-info .sku {
    font-size: 14px;
    color: var(--gray-500);
    margin-bottom: 24px;
}
.product-info .summary {
    font-size: 16px;
    color: var(--gray-600);
    line-height: 1.8;
    margin-bottom: 32px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--gray-200);
}
.product-specs { margin-bottom: 32px; }
.product-specs h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 16px;
}
.spec-row {
    display: flex;
    padding: 12px 0;
    border-bottom: 1px solid var(--gray-100);
    font-size: 14px;
}
.spec-label {
    width: 140px;
    color: var(--gray-500);
    font-weight: 500;
}
.spec-value { color: var(--gray-800); font-weight: 600; }
.product-actions { display: flex; gap: 16px; }

.product-content-section {
    padding-top: 60px;
    border-top: 1px solid var(--gray-200);
}
.product-content-section h2 {
    font-size: 28px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 24px;
}
.product-content {
    font-size: 16px;
    line-height: 1.8;
    color: var(--gray-700);
}
.product-content h3 { font-size: 20px; margin: 24px 0 12px; color: var(--dark); }
.product-content p { margin-bottom: 16px; }
.product-content ul, .product-content ol { margin: 16px 0; padding-left: 24px; }
.product-content li { margin-bottom: 8px; list-style: disc; }
.product-content img { border-radius: var(--radius-md); margin: 20px 0; }
.product-content strong { color: var(--dark); }

.related-products { padding: 80px 0; background: var(--gray-50); }
.related-products h2 {
    font-size: 32px;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 40px;
    text-align: center;
}

/* ---------- 关于页面 ---------- */
.about-hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    padding: 60px 0;
    border-top: 1px solid var(--gray-200);
    border-bottom: 1px solid var(--gray-200);
    margin: 80px 0;
}
.about-stat { text-align: center; }
.about-stat-num {
    font-size: 52px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
    margin-bottom: 8px;
}
.about-stat-num .unit { font-size: 24px; }
.about-stat-label {
    font-size: 15px;
    color: var(--gray-600);
    font-weight: 500;
}

.timeline { position: relative; padding-left: 40px; }
.timeline::before {
    content: '';
    position: absolute;
    left: 8px; top: 0; bottom: 0;
    width: 2px;
    background: var(--gray-200);
}
.timeline-item { position: relative; margin-bottom: 40px; }
.timeline-item::before {
    content: '';
    position: absolute;
    left: -36px; top: 6px;
    width: 18px; height: 18px;
    background: var(--white);
    border: 3px solid var(--primary);
    border-radius: 50%;
}
.timeline-year {
    font-size: 24px;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 8px;
}
.timeline-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
}
.timeline-desc {
    font-size: 15px;
    color: var(--gray-600);
    line-height: 1.7;
}

/* ---------- 联系页面 ---------- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
}
.contact-info-card {
    background: var(--dark);
    border-radius: var(--radius-lg);
    padding: 48px;
    color: rgba(255,255,255,0.7);
}
.contact-info-card h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 12px;
}
.contact-info-card > p {
    font-size: 15px;
    margin-bottom: 36px;
    line-height: 1.7;
}
.contact-info-item {
    display: flex;
    gap: 20px;
    margin-bottom: 28px;
    padding-bottom: 28px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.contact-info-item:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.contact-info-icon {
    flex-shrink: 0;
    width: 52px; height: 52px;
    background: rgba(2,132,199,0.2);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-lighter);
    font-size: 20px;
    font-weight: 700;
}
.contact-info-item h4 {
    font-size: 15px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 6px;
}
.contact-info-item p {
    font-size: 14px;
    line-height: 1.6;
}

.contact-form-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 48px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--gray-100);
}
.contact-form-card h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
}
.contact-form-card > p {
    font-size: 15px;
    color: var(--gray-600);
    margin-bottom: 32px;
}
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}
.form-group { margin-bottom: 20px; }
.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 8px;
}
.form-group label .required { color: var(--danger); }
.form-control {
    width: 100%;
    padding: 14px 18px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-sm);
    font-size: 15px;
    color: var(--gray-800);
    background: var(--white);
    transition: all var(--transition-fast);
    outline: none;
}
.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(2,132,199,0.1);
}
.form-control::placeholder { color: var(--gray-400); }
textarea.form-control { resize: vertical; min-height: 140px; }
.form-group.has-error .form-control { border-color: var(--danger); }
.form-error {
    font-size: 13px;
    color: var(--danger);
    margin-top: 6px;
    display: none;
}
.form-group.has-error .form-error { display: block; }
.form-success {
    background: rgba(16,185,129,0.1);
    border: 1px solid rgba(16,185,129,0.3);
    color: var(--success);
    padding: 16px 20px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    font-size: 14px;
    display: none;
}
.form-success.show { display: block; }

/* ---------- 文件上传区域 ---------- */
.file-upload-area {
    position: relative;
    border: 2px dashed var(--gray-300);
    border-radius: var(--radius-md);
    padding: 32px 24px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    background: var(--gray-50);
}
.file-upload-area:hover,
.file-upload-area.dragover {
    border-color: var(--primary);
    background: var(--primary-50);
}
.file-input {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
}
.file-upload-icon {
    font-size: 36px;
    color: var(--primary);
    margin-bottom: 12px;
}
.file-upload-text {
    font-size: 15px;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 6px;
}
.file-upload-hint {
    font-size: 12px;
    color: var(--gray-500);
}
.file-upload-selected {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}
.file-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
}
.file-remove {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--gray-200);
    color: var(--gray-600);
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    flex-shrink: 0;
    border: none;
}
.file-remove:hover {
    background: var(--danger);
    color: var(--white);
}

/* ---------- 分页 ---------- */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 60px;
}
.pagination a, .pagination span {
    min-width: 44px; height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 14px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    color: var(--gray-600);
    transition: all var(--transition-fast);
}
.pagination a:hover { border-color: var(--primary); color: var(--primary); }
.pagination .current {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}
.pagination .disabled { opacity: 0.4; cursor: not-allowed; }

/* ---------- 滚动动画 ---------- */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ---------- 响应式 ---------- */
@media (max-width: 1200px) {
    .products-grid { grid-template-columns: repeat(2, 1fr); }
    .capabilities-grid { grid-template-columns: repeat(2, 1fr); }
    .capabilities-image-grid { grid-template-columns: repeat(2, 1fr); }
    .process-steps { grid-template-columns: repeat(3, 1fr); }
    .process-step:nth-child(3)::after { display: none; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
}

@media (max-width: 992px) {
    :root { --section-padding: 80px; --container-padding: 24px; }
    .topbar { display: none; }
    .header .container { height: 72px; }
    .nav-menu { display: none; }
    .mobile-toggle { display: flex; }
    .header-actions .btn { display: none; }
    .about-grid { grid-template-columns: 1fr; gap: 48px; }
    .about-image img { height: 400px; }
    .product-detail-grid { grid-template-columns: 1fr; gap: 48px; }
    .contact-grid { grid-template-columns: 1fr; }
    .hero-stats .container { grid-template-columns: repeat(2, 1fr); gap: 20px; }
    .hero-stat { border-left: none; padding: 0; }
    .about-hero-stats { grid-template-columns: repeat(2, 1fr); gap: 32px; }
    .products-header { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 768px) {
    .products-grid { grid-template-columns: 1fr; }
    .capabilities-grid { grid-template-columns: 1fr; }
    .capabilities-image-grid { grid-template-columns: 1fr; }
    .capability-image-card { height: 320px; }
    .process-steps { grid-template-columns: 1fr; }
    .process-step::after { display: none; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
    .form-row { grid-template-columns: 1fr; }
    .chat-panel { width: calc(100vw - 48px); right: -8px; }
    .cookie-banner { left: 16px; right: 16px; max-width: none; bottom: 16px; }
    .hero-actions { flex-direction: column; }
    .hero-actions .btn { width: 100%; }
    .product-gallery-thumbs { grid-template-columns: repeat(3, 1fr); }
    .contact-info-card, .contact-form-card { padding: 32px 24px; }
    .scroll-indicator { display: none; }
    .capability-subtitle { white-space: normal; }
    .cta-content h2 { white-space: normal; }
    .section-title-nowrap { white-space: normal; }
    .products-header > div:first-child {
        position: static;
        transform: none;
        text-align: left;
    }
    .products-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
    }
}

/* 移动端菜单 */
.mobile-menu {
    position: fixed;
    top: 0; right: -100%;
    width: 320px; max-width: 85vw;
    height: 100vh;
    background: var(--white);
    z-index: 1100;
    padding: 80px 32px 32px;
    transition: right var(--transition-base);
    box-shadow: var(--shadow-xl);
    overflow-y: auto;
}
.mobile-menu.active { right: 0; }
.mobile-menu-overlay {
    position: fixed;
    inset: 0;
    background: rgba(10,22,40,0.5);
    z-index: 1099;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}
.mobile-menu-overlay.active { opacity: 1; visibility: visible; }
.mobile-menu-close {
    position: absolute;
    top: 24px; right: 24px;
    width: 40px; height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--gray-600);
}
.mobile-menu ul { margin-top: 20px; }
.mobile-menu ul li { margin-bottom: 4px; }
.mobile-menu ul a {
    display: block;
    padding: 14px 0;
    font-size: 17px;
    font-weight: 600;
    color: var(--gray-800);
    border-bottom: 1px solid var(--gray-100);
}
.mobile-menu ul a:hover, .mobile-menu ul a.active { color: var(--primary); }
.mobile-menu .btn { width: 100%; margin-top: 24px; }

/* ---------- WhatsApp 悬浮按钮 ---------- */
.whatsapp-widget {
    position: fixed;
    right: 32px;
    bottom: 155px;
    z-index: 999;
}
.whatsapp-toggle {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: #25D366;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 32px rgba(37, 211, 102, 0.4);
    transition: all 0.3s ease;
    position: relative;
    animation: whatsappPulse 2s ease-in-out infinite;
    text-decoration: none;
}
.whatsapp-toggle:hover {
    transform: scale(1.1);
    box-shadow: 0 12px 40px rgba(37, 211, 102, 0.5);
    background: #1ebe5d;
}
.whatsapp-toggle::before,
.whatsapp-toggle::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 50%;
    border: 2px solid #25D366;
    animation: whatsappBreathe 2.5s ease-out infinite;
}
.whatsapp-toggle::after {
    animation-delay: 1.25s;
}
@keyframes whatsappPulse {
    0%, 100% { box-shadow: 0 8px 32px rgba(37, 211, 102, 0.4); }
    50% { box-shadow: 0 8px 48px rgba(37, 211, 102, 0.65); }
}
@keyframes whatsappBreathe {
    0% { transform: scale(1); opacity: 0.8; }
    100% { transform: scale(1.8); opacity: 0; }
}
.whatsapp-prompt {
    position: absolute;
    right: 80px; top: 50%;
    transform: translateY(-50%);
    background: #fff;
    color: #1e293b;
    padding: 12px 20px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    box-shadow: 0 2px 12px rgba(0,0,0,0.12);
    white-space: nowrap;
    pointer-events: none;
    animation: whatsappPromptFloat 3s ease-in-out infinite;
}
.whatsapp-prompt::after {
    content: '';
    position: absolute;
    right: -6px; top: 50%;
    transform: translateY(-50%) rotate(45deg);
    width: 12px; height: 12px;
    background: #fff;
}
@keyframes whatsappPromptFloat {
    0%, 100% { transform: translateY(-50%) translateX(0); }
    50% { transform: translateY(-50%) translateX(-6px); }
}
@media (max-width: 768px) {
    .whatsapp-widget { right: 32px; bottom: 155px; }
    .whatsapp-toggle { width: 56px; height: 56px; }
    .whatsapp-prompt { display: none; }
}

/* ---------- 社交媒体品牌颜色 ---------- */
.footer-social .social-linkedin { color: #0077B5; background: rgba(0,119,181,0.12); }
.footer-social .social-linkedin:hover { background: #0077B5; color: #fff; }
.footer-social .social-facebook { color: #1877F2; background: rgba(24,119,242,0.12); }
.footer-social .social-facebook:hover { background: #1877F2; color: #fff; }
.footer-social .social-youtube { color: #FF0000; background: rgba(255,0,0,0.12); }
.footer-social .social-youtube:hover { background: #FF0000; color: #fff; }
.footer-social .social-twitter { color: #FFFFFF; background: rgba(255,255,255,0.12); }
.footer-social .social-twitter:hover { background: #FFFFFF; color: #000; }
.footer-social .social-instagram {
    color: #E4405F;
    background: rgba(228,64,95,0.12);
}
.footer-social .social-instagram:hover {
    background: linear-gradient(45deg, #f09433, #e6683c, #dc2743, #cc2366, #bc1888);
    color: #fff;
}

/* ---------- FAQ手风琴折叠面板 ---------- */
.faq-accordion-item {
    background: #fff;
    border-radius: 12px;
    margin-bottom: 12px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    border-left: 4px solid #0284c7;
    overflow: hidden;
    transition: box-shadow 0.3s ease;
}
.faq-accordion-item:hover {
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}
.faq-accordion-item.active {
    border-left-color: #0ea5e9;
}
.faq-accordion-question {
    padding: 18px 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    user-select: none;
    transition: background 0.2s ease;
}
.faq-accordion-question:hover {
    background: #f0f9ff;
}
.faq-q-icon {
    background: #0284c7;
    color: #fff;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
    flex-shrink: 0;
}
.faq-accordion-item.active .faq-q-icon {
    background: #0ea5e9;
}
.faq-q-text {
    flex: 1;
    font-size: 15px;
    font-weight: 600;
    color: #0f172a;
    line-height: 1.5;
}
.faq-accordion-icon {
    font-size: 22px;
    font-weight: 300;
    color: #0284c7;
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s ease, color 0.3s ease;
}
.faq-accordion-item.active .faq-accordion-icon {
    transform: rotate(45deg);
    color: #0ea5e9;
}
.faq-accordion-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}
.faq-accordion-item.active .faq-accordion-answer {
    max-height: 500px;
}
.faq-accordion-answer-inner {
    padding: 0 24px 20px 64px;
    color: #64748b;
    font-size: 14px;
    line-height: 1.8;
}

@media (max-width: 768px) {
    .faq-accordion-question {
        padding: 14px 16px;
    }
    .faq-q-text {
        font-size: 14px;
    }
    .faq-accordion-answer-inner {
        padding: 0 16px 16px 56px;
        font-size: 13px;
    }
}