/* ========== CSS Variables ========== */
:root {
    --primary: #003c8f;
    --primary-light: #1565c0;
    --primary-dark: #002266;
    --primary-darker: #001440;
    --accent: #0091ea;
    --accent-light: #40c4ff;
    --white: #ffffff;
    --gray-50: #f8f9fa;
    --gray-100: #f0f2f5;
    --gray-200: #e4e7ec;
    --gray-300: #cdd1d9;
    --gray-400: #98a2b3;
    --gray-500: #667085;
    --gray-600: #475467;
    --gray-700: #344054;
    --gray-800: #1d2939;
    --gray-900: #101828;
    --font-cn: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --font-en: 'DM Sans', 'Helvetica Neue', Arial, sans-serif;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
    --shadow-xl: 0 16px 48px rgba(0,0,0,0.15);
    --radius: 4px;
    --radius-lg: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========== Reset ========== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 16px; }
body { font-family: var(--font-cn); color: var(--gray-800); line-height: 1.6; background: var(--white); overflow-y: auto; overflow-x: hidden; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
ul, li { list-style: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

.container { max-width: 1400px; margin: 0 auto; padding: 0 40px; }

/* ========== Preloader ========== */
.preloader {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: var(--white); z-index: 9999;
    display: flex; align-items: center; justify-content: center;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}
.preloader.hidden { opacity: 0; visibility: hidden; pointer-events: none; }
.preloader-inner { text-align: center; }
.preloader-logo { font-family: var(--font-en); font-size: 28px; font-weight: 700; color: var(--primary); letter-spacing: 4px; margin-bottom: 20px; }
.preloader-bar { width: 200px; height: 3px; background: var(--gray-200); border-radius: 2px; overflow: hidden; }
.preloader-progress { width: 0; height: 100%; background: var(--primary); border-radius: 2px; animation: preloaderProgress 1.2s ease forwards; }
@keyframes preloaderProgress { to { width: 100%; } }

/* ========== Header ========== */
.header { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; transition: var(--transition); }
.header.scrolled { box-shadow: var(--shadow-md); }
.header.scrolled .header-top { display: none; }

.header-top {
    background: #f8f9fa; color: var(--gray-600); font-size: 12px;
    border-bottom: 1px solid var(--gray-100);
    transition: var(--transition);
}
.header-top-inner {
    display: flex; align-items: center; justify-content: space-between;
    padding: 8px 0;
}
.header-top-right { display: flex; gap: 20px; }

.header-main {
    background: rgba(255,255,255,0.98); backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(0,0,0,0.05);
}
/* Header 内容贴边显示（去除大块留白） */
.header .container { padding: 0 32px; max-width: 100%; }
.header-inner {
    display: flex; align-items: center; justify-content: space-between;
    height: 84px; gap: 8px;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    flex-shrink: 0;
    gap: 12px;
    text-decoration: none;
    transition: var(--transition);
}
.logo:hover { transform: scale(1.02); }
.logo-img-dark, .logo-img-light {
    height: 52px;
    width: auto;
    object-fit: contain;
    display: block;
}
.logo-img-light { display: none; }
.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}
.logo-text-cn {
    font-size: 18px;
    font-weight: 700;
    color: var(--gray-900);
    letter-spacing: 2px;
    font-family: var(--font-cn);
}
.logo-text-en {
    font-family: var(--font-en);
    font-size: 11px;
    color: var(--gray-400);
    letter-spacing: 2.5px;
    margin-top: 2px;
    text-transform: uppercase;
    font-weight: 600;
}

/* Nav */
.main-nav { display: flex; align-items: center; gap: 0; flex-shrink: 0; }
.nav-item { position: relative; }
.nav-item > a {
    display: flex; align-items: center; padding: 24px 18px;
    font-size: 15px; font-weight: 500; color: var(--gray-700);
    letter-spacing: 0.5px; position: relative; white-space: nowrap;
}
.nav-item > a::after {
    content: ''; position: absolute; bottom: 18px; left: 18px; right: 18px;
    height: 2px; background: var(--primary); transform: scaleX(0);
    transition: transform 0.3s ease;
}
.nav-item > a:hover { color: var(--primary); }
.nav-item > a:hover::after, .nav-item.active > a::after { transform: scaleX(1); }
.nav-item.active > a { color: var(--primary); }

.nav-dropdown {
    position: absolute; top: 100%; left: 50%;
    transform: translateX(-50%) translateY(8px);
    background: var(--white); border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl); padding: 12px 8px;
    min-width: 180px; opacity: 0; visibility: hidden;
    transition: all 0.25s ease; border: 1px solid var(--gray-100);
}
.nav-item:hover .nav-dropdown { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }
.nav-dropdown a {
    display: block; padding: 10px 16px; font-size: 14px;
    color: var(--gray-600); border-radius: var(--radius);
    white-space: nowrap;
}
.nav-dropdown a:hover { background: var(--gray-50); color: var(--primary); }

/* Header Right */
.header-right { display: flex; align-items: center; gap: 14px; flex-shrink: 0; }
.header-phone {
    display: flex; align-items: center; gap: 6px;
    font-family: var(--font-en); font-size: 15px; font-weight: 600;
    color: var(--primary); white-space: nowrap;
}
.header-search-btn {
    width: 44px; height: 44px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    color: var(--gray-700); cursor: pointer;
    transition: var(--transition);
    background: var(--gray-50);
}
.header-search-btn svg { width: 22px; height: 22px; }
.header-search-btn:hover { background: var(--primary); color: var(--white); transform: rotate(15deg); }
.lang-btn {
    display: inline-flex; align-items: center; padding: 5px 14px;
    border: 1.5px solid var(--primary); border-radius: 20px;
    font-family: var(--font-en); font-size: 12px; font-weight: 600;
    color: var(--primary); letter-spacing: 1px;
}
.lang-btn:hover { background: var(--primary); color: var(--white); }

.mobile-menu-btn { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.mobile-menu-btn span { width: 22px; height: 2px; background: var(--gray-700); border-radius: 2px; transition: var(--transition); }

/* ========== Hero ========== */
.hero { position: relative; width: 100%; height: 100vh; min-height: 600px; overflow: hidden; background: var(--primary-dark); }
.hero-particles { position: absolute; top: 0; left: 0; width: 100%; height: 100%; z-index: 1; pointer-events: none; }
.hero-slides { position: relative; width: 100%; height: 100%; }
.hero-slide {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    opacity: 0; transition: opacity 1s ease; z-index: 1;
}
.hero-slide.active { opacity: 1; z-index: 2; }
.hero-slide-bg {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background-size: cover; background-position: center;
    transform: scale(1.08); transition: transform 8s ease;
}
.hero-slide.active .hero-slide-bg { transform: scale(1); }
.hero-slide-bg-video {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    object-fit: cover;
}
.hero-slide-overlay {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(60, 60, 70, 0.18);
}

.hero-content {
    position: absolute; top: 50%; left: 50%;
    transform: translate(-50%, -50%); text-align: center;
    color: var(--white); z-index: 3; width: 100%; max-width: 900px; padding: 0 40px;
}
.hero-subtitle {
    font-family: var(--font-en); font-size: 18px; font-weight: 500;
    letter-spacing: 6px; text-transform: uppercase; opacity: 0.88; margin-bottom: 20px;
}
.hero-title { font-size: 46px; font-weight: 900; letter-spacing: 3px; margin-bottom: 24px; line-height: 1.3; text-wrap: balance; }
.hero-line { width: 60px; height: 3px; background: var(--accent-light); margin: 0 auto 24px; }
.hero-desc { font-size: 17px; font-weight: 300; opacity: 0.85; letter-spacing: 2px; margin-bottom: 40px; }
.hero-btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 14px 36px; background: transparent;
    border: 2px solid rgba(255,255,255,0.5); color: var(--white);
    font-size: 15px; font-weight: 500; letter-spacing: 2px; border-radius: 2px;
}
.hero-btn:hover { background: var(--white); color: var(--primary); border-color: var(--white); }

/* Hero animations */
.anim-fade-up { opacity: 0; transform: translateY(30px); animation: heroFadeUp 0.8s forwards; }
.anim-line-expand { transform: scaleX(0); animation: lineExpand 0.6s forwards; }
@keyframes heroFadeUp { to { opacity: 1; transform: translateY(0); } }
@keyframes lineExpand { to { transform: scaleX(1); } }

.hero-slide:not(.active) .anim-fade-up,
.hero-slide:not(.active) .anim-line-expand { animation: none; opacity: 0; }

/* Hero Nav */
.hero-nav { position: absolute; top: 50%; left: 0; right: 0; z-index: 5; transform: translateY(-50%); pointer-events: none; }
.hero-arrow {
    position: absolute; width: 50px; height: 50px;
    display: flex; align-items: center; justify-content: center;
    color: rgba(255,255,255,0.6); border: 1px solid rgba(255,255,255,0.2);
    border-radius: 50%; pointer-events: auto; transition: var(--transition);
}
.hero-arrow:hover { color: var(--white); border-color: rgba(255,255,255,0.5); background: rgba(255,255,255,0.1); }
.hero-prev { left: 30px; }
.hero-next { right: 30px; }

.hero-pagination { position: absolute; bottom: 50px; left: 50%; transform: translateX(-50%); z-index: 5; display: flex; gap: 10px; }
.hero-dot { width: 10px; height: 10px; border-radius: 50%; background: rgba(255,255,255,0.3); transition: var(--transition); border: none; }
.hero-dot.active { background: var(--white); width: 30px; border-radius: 5px; }

.hero-scroll {
    position: absolute; bottom: 50px; left: 50px; z-index: 5;
    display: flex; flex-direction: column; align-items: center; gap: 8px;
    color: rgba(255,255,255,0.5); font-family: var(--font-en); font-size: 11px;
    letter-spacing: 3px; text-transform: uppercase; animation: scrollBounce 2s infinite;
}
.hero-scroll-line { width: 1px; height: 40px; background: linear-gradient(to bottom, rgba(255,255,255,0.5), transparent); }
@keyframes scrollBounce { 0%,100% { transform: translateY(0); } 50% { transform: translateY(8px); } }

.hero-progress-bar {
    position: absolute; bottom: 0; left: 0; width: 100%; height: 3px;
    background: rgba(255,255,255,0.1); z-index: 5;
}
.hero-progress { height: 100%; background: var(--accent); width: 0; transition: width 0.1s linear; }

/* ========== Sections ========== */
.section { padding: 100px 0; }
.section-header { margin-bottom: 10px; }
.section-header-row { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: 50px; }
.section-title-cn { font-size: 34px; font-weight: 700; color: var(--gray-900); letter-spacing: 2px; }
.section-title-en { font-family: var(--font-en); font-size: 13px; color: var(--gray-400); letter-spacing: 3px; text-transform: uppercase; }
.more-btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 10px 24px; border: 1.5px solid var(--gray-300); border-radius: 2px;
    font-size: 14px; color: var(--gray-600); white-space: nowrap;
}
.more-btn:hover { border-color: var(--primary); color: var(--primary); }

/* ========== Products Section ========== */
.products-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.product-card {
    position: relative; border-radius: var(--radius-lg); overflow: hidden;
    background: var(--gray-50); transition: var(--transition); cursor: pointer;
}
.product-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.product-card.large { grid-column: span 2; display: grid; grid-template-columns: 1fr 1fr; min-height: 360px; }
.product-card.small { display: flex; flex-direction: column; }
.product-card-info { padding: 40px 36px; display: flex; flex-direction: column; justify-content: center; }
.product-card-tag { font-family: var(--font-en); font-size: 11px; font-weight: 600; color: var(--accent); letter-spacing: 2px; text-transform: uppercase; margin-bottom: 10px; }
.product-card-title { font-size: 22px; font-weight: 700; color: var(--gray-900); margin-bottom: 6px; letter-spacing: 1px; }
.product-card-title-en { font-family: var(--font-en); font-size: 13px; color: var(--gray-400); margin-bottom: 16px; }
.product-card-link { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; font-weight: 500; color: var(--primary); margin-top: auto; }
.product-card-link:hover { gap: 12px; }
.product-card-img {
    display: flex; align-items: center; justify-content: center;
    padding: 30px; overflow: hidden;
}
.product-card-img img, .product-card-img video { max-height: 280px; object-fit: contain; transition: transform 0.5s ease; display: block; }
.product-card:hover .product-card-img img, .product-card:hover .product-card-img video { transform: scale(1.05); }
.product-card.small .product-card-img { min-height: 200px; padding: 20px; }
.product-card.small .product-card-img img, .product-card.small .product-card-img video { max-height: 180px; }
.product-card.small .product-card-info { padding: 24px 30px; }
.product-card.small .product-card-title { font-size: 18px; }

/* ========== About Preview ========== */
.about-preview { background: var(--white); }
.about-preview-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 60px; align-items: center; }
.about-preview-img { position: relative; border-radius: var(--radius-lg); overflow: hidden; aspect-ratio: 16/10; }
.about-preview-img img { width: 100%; height: 100%; object-fit: cover; }
.about-preview-img-overlay {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(135deg, rgba(0,60,143,0.3), transparent 60%);
}
.about-preview-label { font-family: var(--font-en); font-size: 14px; color: var(--gray-400); letter-spacing: 3px; margin-bottom: 12px; }
.about-preview-title { font-size: 28px; font-weight: 700; color: var(--gray-900); margin-bottom: 20px; letter-spacing: 1px; }
.about-preview-text { margin-bottom: 30px; }
.about-preview-text p { font-size: 15px; color: var(--gray-600); line-height: 2; }

/* ========== Applications Swiper ========== */
.app-swiper { position: relative; overflow: hidden; }
.app-swiper-track { display: flex; gap: 20px; transition: transform 0.5s cubic-bezier(0.4,0,0.2,1); }
.app-card {
    min-width: calc(33.333% - 14px); border-radius: var(--radius-lg);
    overflow: hidden; cursor: pointer; position: relative;
    background: var(--gray-50); transition: var(--transition);
}
.app-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.app-card-img { aspect-ratio: 4/3; overflow: hidden; }
.app-card-img img, .app-card-img video { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; display: block; }
.app-card:hover .app-card-img img, .app-card:hover .app-card-img video { transform: scale(1.08); }
.app-card-content { padding: 24px; position: relative; }
.app-card-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
.app-card-title { font-size: 18px; font-weight: 700; color: var(--gray-900); }
.app-card-arrow { color: var(--primary); transition: var(--transition); }
.app-card:hover .app-card-arrow { transform: translate(4px, -4px); }
.app-card-desc { font-size: 13px; color: var(--gray-500); line-height: 1.7; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.app-card-arrow-bg {
    position: absolute; bottom: -20px; right: -20px; color: rgba(0,60,143,0.05);
    transition: var(--transition);
}
.app-card:hover .app-card-arrow-bg { color: rgba(0,60,143,0.1); transform: translate(-4px,-4px); }

.app-swiper-nav { display: flex; justify-content: center; gap: 12px; margin-top: 30px; }
.app-swiper-btn {
    width: 44px; height: 44px; border-radius: 50%;
    border: 1.5px solid var(--gray-300); display: flex; align-items: center;
    justify-content: center; color: var(--gray-600); transition: var(--transition);
}
.app-swiper-btn:hover { border-color: var(--primary); color: var(--primary); }

/* ========== News ========== */
.news-section { background: var(--gray-50); }
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card {
    background: var(--white); border-radius: var(--radius-lg);
    overflow: hidden; transition: var(--transition); cursor: pointer;
}
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.news-card-img { aspect-ratio: 16/10; overflow: hidden; }
.news-card-img img, .news-card-img video { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; display: block; }
.news-card:hover .news-card-img img, .news-card:hover .news-card-img video { transform: scale(1.05); }
.news-card-info { padding: 24px; }
.news-card-title { font-size: 16px; font-weight: 600; color: var(--gray-900); line-height: 1.6; margin-bottom: 10px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-card-excerpt { font-size: 13px; color: var(--gray-500); line-height: 1.7; margin-bottom: 12px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-card-date { font-family: var(--font-en); font-size: 13px; color: var(--gray-400); }

/* ========== Culture ========== */
.culture-section { background: var(--gray-50); }
.culture-header { text-align: center; margin-bottom: 50px; }
.culture-header h2 { font-size: 32px; font-weight: 700; color: var(--gray-900); margin-bottom: 8px; }
.culture-header p { font-size: 15px; color: var(--gray-500); }
.culture-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.culture-card {
    background: var(--white); border-radius: var(--radius-lg);
    padding: 40px 30px; text-align: center; transition: var(--transition); cursor: pointer;
}
.culture-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.culture-card-icon { width: 60px; height: 60px; margin: 0 auto 16px; }
.culture-card-icon img { width: 100%; height: 100%; object-fit: contain; }
.culture-card h3 { font-size: 20px; font-weight: 700; color: var(--gray-900); margin-bottom: 12px; }
.culture-card-line { width: 30px; height: 2px; background: var(--primary); margin: 0 auto 16px; }
.culture-card p { font-size: 14px; color: var(--gray-500); line-height: 1.8; }

/* ========== Page Banners ========== */
.page-banner { position: relative; height: 320px; overflow: hidden; margin-top: 0; }
.page-banner-bg { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }
.page-banner-content {
    position: relative; z-index: 2; height: 100%;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    color: var(--white); text-align: center; padding-top: 80px;
}
.page-banner-content h1 { font-size: 36px; font-weight: 700; letter-spacing: 3px; margin-bottom: 8px; }
.page-banner-en { font-family: var(--font-en); font-size: 14px; letter-spacing: 4px; opacity: 0.6; margin-bottom: 16px; }
.page-breadcrumb { font-size: 13px; opacity: 0.7; }
.page-breadcrumb a { opacity: 0.8; }
.page-breadcrumb a:hover { opacity: 1; text-decoration: underline; }

/* ========== Products Page ========== */
.products-page-grid { display: grid; grid-template-columns: 240px 1fr; gap: 40px; }
.product-sidebar { background: var(--gray-50); border-radius: var(--radius-lg); padding: 0; overflow: hidden; align-self: start; position: sticky; top: 100px; }
.sidebar-title { font-size: 18px; font-weight: 700; color: var(--white); background: var(--primary); padding: 18px 24px; letter-spacing: 1px; }
.sidebar-cat-list { list-style: none; padding: 0; margin: 0; }
.sidebar-cat {
    padding: 14px 24px; font-size: 14px; color: var(--gray-600); cursor: pointer;
    transition: var(--transition); border-bottom: 1px solid var(--gray-100); position: relative;
}
.sidebar-cat:last-child { border-bottom: none; }
.sidebar-cat:hover { color: var(--primary); background: rgba(0,60,143,0.03); padding-left: 28px; }
.sidebar-cat.active { color: var(--primary); font-weight: 600; background: rgba(0,60,143,0.06); border-left: 3px solid var(--primary); }
.product-main { flex: 1; }
.product-category-tabs { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 40px; }
.cat-tab {
    padding: 10px 24px; border: 1.5px solid var(--gray-200); border-radius: 2px;
    font-size: 14px; color: var(--gray-600); transition: var(--transition);
}
.cat-tab:hover, .cat-tab.active { border-color: var(--primary); color: var(--primary); background: rgba(0,60,143,0.04); }
.product-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.product-list-item {
    background: var(--white); border-radius: var(--radius-lg);
    overflow: hidden; transition: var(--transition); cursor: pointer;
    border: 1px solid var(--gray-100);
}
.product-list-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: transparent; }
.product-list-item.hidden { display: none; }
.product-list-img { aspect-ratio: 1/1; display: flex; align-items: center; justify-content: center; padding: 24px; overflow: hidden; background: var(--gray-50); }
.product-list-img img, .product-list-img video { max-height: 200px; max-width: 100%; object-fit: contain; transition: transform 0.4s ease; display: block; }
.product-list-item:hover .product-list-img img, .product-list-item:hover .product-list-img video { transform: scale(1.05); }
.product-list-info { padding: 16px 20px; text-align: center; }
.product-list-info h3 { font-size: 15px; font-weight: 600; color: var(--gray-900); margin-bottom: 8px; line-height: 1.4; }
.product-list-divider { width: 30px; height: 2px; background: var(--primary); margin: 8px auto; opacity: 0.4; }
.product-list-info p { font-size: 13px; color: var(--gray-500); line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.product-list-tag { display: inline-block; padding: 3px 10px; background: rgba(0,60,143,0.08); color: var(--primary); font-size: 12px; border-radius: 2px; }
.product-pagination { display: flex; align-items: center; justify-content: center; gap: 6px; margin-top: 40px; }
.page-num, .page-next {
    width: 36px; height: 36px; display: flex; align-items: center; justify-content: center;
    border: 1px solid var(--gray-200); border-radius: var(--radius); font-size: 14px;
    color: var(--gray-600); cursor: pointer; transition: var(--transition);
}
.page-num:hover, .page-next:hover { border-color: var(--primary); color: var(--primary); }
.page-num.active { background: var(--primary); color: var(--white); border-color: var(--primary); }

/* ========== Applications Full Page (overlay style) ========== */
.app-full-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.app-full-card {
    position: relative; border-radius: var(--radius-lg); overflow: hidden;
    height: 360px; cursor: pointer; transition: var(--transition);
}
.app-full-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.app-full-card img, .app-full-card video { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; display: block; }
.app-full-card:hover img, .app-full-card:hover video { transform: scale(1.05); }
.app-full-overlay {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(to top, rgba(0,20,60,0.85) 0%, rgba(0,60,143,0.3) 50%, transparent 100%);
    transition: var(--transition);
}
.app-full-card:hover .app-full-overlay { background: linear-gradient(to top, rgba(0,20,60,0.9) 0%, rgba(0,60,143,0.5) 60%, rgba(0,60,143,0.2) 100%); }
.app-full-content { position: absolute; bottom: 0; left: 0; right: 0; padding: 30px; color: var(--white); z-index: 1; }
.app-full-content h3 { font-size: 20px; font-weight: 700; margin-bottom: 8px; }
.app-full-content p { font-size: 13px; opacity: 0; max-height: 0; overflow: hidden; transition: all 0.4s ease; line-height: 1.7; }
.app-full-card:hover .app-full-content p { opacity: 0.8; max-height: 100px; }

/* ========== Applications Page (card grid style) ========== */
.app-page-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.app-page-card {
    background: var(--white); border-radius: var(--radius-lg); overflow: hidden;
    border: 1px solid var(--gray-100); transition: var(--transition); cursor: pointer;
}
.app-page-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: transparent; }
.app-page-card-img { aspect-ratio: 16/10; overflow: hidden; }
.app-page-card-img img, .app-page-card-img video { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; display: block; }
.app-page-card:hover .app-page-card-img img, .app-page-card:hover .app-page-card-img video { transform: scale(1.05); }
.app-page-card-body { padding: 24px; }
.app-page-card-body h3 { font-size: 18px; font-weight: 700; color: var(--gray-900); margin-bottom: 10px; }
.app-page-card-divider { width: 30px; height: 2px; background: var(--primary); margin-bottom: 12px; opacity: 0.5; }
.app-page-card-body p { font-size: 14px; color: var(--gray-500); line-height: 1.8; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }

/* ========== News Full Page ========== */
.news-tabs { display: flex; gap: 0; margin-bottom: 40px; border-bottom: 2px solid var(--gray-200); }
.news-tab {
    padding: 14px 28px; font-size: 15px; color: var(--gray-600);
    border-bottom: 2px solid transparent; margin-bottom: -2px; transition: var(--transition);
}
.news-tab:hover, .news-tab.active { color: var(--primary); border-bottom-color: var(--primary); }
.news-full-list { display: flex; flex-direction: column; gap: 24px; }
.news-full-item {
    display: flex; gap: 24px; padding: 24px;
    background: var(--gray-50); border-radius: var(--radius-lg);
    transition: var(--transition); cursor: pointer;
}
.news-full-item:hover { box-shadow: var(--shadow-md); transform: translateX(4px); }
.news-full-date {
    flex-shrink: 0; width: 80px; text-align: center;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
}
.news-full-date .day { font-family: var(--font-en); font-size: 36px; font-weight: 700; color: var(--primary); line-height: 1; }
.news-full-date .ym { font-size: 12px; color: var(--gray-400); margin-top: 4px; }
.news-full-img { flex-shrink: 0; width: 200px; border-radius: var(--radius); overflow: hidden; }
.news-full-img img, .news-full-img video { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 16/10; display: block; }
.news-full-info { flex: 1; }
.news-full-info h3 { font-size: 17px; font-weight: 600; color: var(--gray-900); margin-bottom: 10px; line-height: 1.5; }
.news-full-info p { font-size: 14px; color: var(--gray-500); line-height: 1.7; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* ========== About Full Page ========== */
.about-full-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; margin-bottom: 80px; }
.about-full-img { border-radius: var(--radius-lg); overflow: hidden; }
.about-full-img img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }
.about-full-content h2 { font-size: 28px; font-weight: 700; color: var(--gray-900); margin-bottom: 24px; }
.about-full-text p { font-size: 15px; color: var(--gray-600); line-height: 2; margin-bottom: 16px; }
.about-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 36px; padding-top: 36px; border-top: 1px solid var(--gray-200); }
.about-stat { text-align: center; }
.about-stat-num { font-family: var(--font-en); font-size: 40px; font-weight: 700; color: var(--primary); line-height: 1; display: inline; }
.about-stat .about-stat-suffix { font-family: var(--font-en); font-size: 20px; color: var(--primary); }
.about-stat-label { font-size: 13px; color: var(--gray-500); margin-top: 6px; }

/* About Intro with Video */
.about-intro-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 60px; align-items: center; }
.about-video-wrap { position: relative; border-radius: var(--radius-lg); overflow: hidden; }
.about-video-cover { position: relative; cursor: pointer; aspect-ratio: 16/10; }
.about-video-cover img { width: 100%; height: 100%; object-fit: cover; }
.about-video-play {
    position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
    transition: var(--transition); opacity: 0.9;
}
.about-video-cover:hover .about-video-play { opacity: 1; transform: translate(-50%, -50%) scale(1.1); }
.about-video { width: 100%; border-radius: var(--radius-lg); }
.about-intro-en { font-family: var(--font-en); font-size: 13px; color: var(--gray-400); letter-spacing: 3px; text-transform: uppercase; margin-bottom: 8px; }
.about-intro-title { font-size: 28px; font-weight: 700; color: var(--gray-900); margin-bottom: 16px; letter-spacing: 1px; }
.about-intro-line { width: 40px; height: 3px; background: var(--primary); margin-bottom: 24px; }
.about-intro-text p { font-size: 15px; color: var(--gray-600); line-height: 2; margin-bottom: 24px; }

/* About Section Headers */
.about-section-header { text-align: center; margin-bottom: 50px; }
.about-section-header h2 { font-size: 30px; font-weight: 700; color: var(--gray-900); margin-bottom: 8px; letter-spacing: 2px; }
.about-section-en { font-family: var(--font-en); font-size: 13px; color: var(--gray-400); letter-spacing: 3px; text-transform: uppercase; margin-bottom: 16px; }
.about-section-line { width: 40px; height: 3px; background: var(--primary); margin: 0 auto; }
.about-culture-section { background: var(--gray-50); }
.about-cert-section { background: var(--white); }
.about-timeline-section { background: var(--gray-50); }

/* Certifications */
.cert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.cert-card {
    background: var(--white); border-radius: var(--radius-lg); padding: 24px;
    text-align: center; transition: var(--transition); border: 1px solid var(--gray-100);
}
.cert-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: transparent; }
.cert-img { aspect-ratio: 4/3; display: flex; align-items: center; justify-content: center; margin-bottom: 12px; }
.cert-img img { max-width: 100%; max-height: 180px; object-fit: contain; }
.cert-card p { font-size: 14px; color: var(--gray-700); font-weight: 500; }

/* Timeline */
.timeline-section { margin-top: 60px; margin-bottom: 60px; }
.timeline-title { font-size: 28px; font-weight: 700; color: var(--gray-900); margin-bottom: 40px; text-align: center; }
.timeline { position: relative; padding-left: 40px; }
.timeline::before { content: ''; position: absolute; left: 12px; top: 0; bottom: 0; width: 2px; background: var(--gray-200); }
.timeline-item { position: relative; padding-bottom: 36px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-dot {
    position: absolute; left: -34px; top: 4px; width: 14px; height: 14px;
    border-radius: 50%; background: var(--primary); border: 3px solid var(--white);
    box-shadow: 0 0 0 2px var(--primary);
}
.timeline-content h4 { font-family: var(--font-en); font-size: 20px; font-weight: 700; color: var(--primary); margin-bottom: 6px; }
.timeline-content p { font-size: 14px; color: var(--gray-600); line-height: 1.7; }

/* ========== Contact Page ========== */
.contact-page-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; margin-bottom: 60px; }
.contact-info-col { }
.contact-brand { margin-bottom: 30px; }
.contact-brand-zep { font-family: var(--font-en); font-size: 32px; font-weight: 700; color: var(--primary-dark); letter-spacing: 2px; }
.contact-brand-tools { font-family: var(--font-en); font-size: 32px; font-weight: 700; color: var(--primary); letter-spacing: 2px; }
.contact-brand-cn { font-size: 16px; color: var(--gray-500); margin-top: 4px; letter-spacing: 2px; }
.contact-items { display: flex; flex-direction: column; gap: 20px; margin-bottom: 24px; }
.contact-item { display: flex; gap: 16px; align-items: flex-start; }
.contact-item-icon { width: 44px; height: 44px; border-radius: 50%; background: rgba(0,60,143,0.08); display: flex; align-items: center; justify-content: center; flex-shrink: 0; color: var(--primary); }
.contact-item label { font-size: 12px; color: var(--gray-400); display: flex; align-items: baseline; gap: 7px; margin-bottom: 2px; }
.contact-label-cn { color: var(--gray-500); }
.contact-label-en { font-family: var(--font-en); font-size: 11px; letter-spacing: 0.8px; text-transform: uppercase; color: var(--gray-400); }
.contact-item p { font-size: 15px; color: var(--gray-800); font-weight: 500; }
.contact-item a { color: var(--primary); }
.contact-divider { height: 1px; background: var(--gray-200); margin: 24px 0; }
.contact-qr-section { display: flex; gap: 20px; align-items: center; }
.contact-qr-img { width: 120px; height: 120px; border-radius: var(--radius); flex-shrink: 0; }
.contact-qr-text p { font-size: 13px; color: var(--gray-500); line-height: 1.8; }
.contact-qr-text strong { color: var(--gray-700); }

/* Office Addresses */
.contact-offices-col { }
.offices-title { font-size: 24px; font-weight: 700; color: var(--gray-900); margin-bottom: 30px; }
.office-list { display: flex; flex-direction: column; }
.office-item { display: flex; gap: 20px; align-items: center; padding: 16px 0; }
.office-icon { width: 48px; height: 48px; flex-shrink: 0; }
.office-icon img { width: 100%; height: 100%; object-fit: contain; }
.office-info h4 { font-size: 16px; font-weight: 600; color: var(--gray-900); margin-bottom: 4px; }
.office-info p { font-size: 14px; color: var(--gray-500); }
.office-divider { height: 1px; background: var(--gray-100); }

/* Contact Form Section */
.contact-form-section { padding-top: 40px; border-top: 1px solid var(--gray-200); }
.contact-form-section h2 { font-size: 24px; font-weight: 700; color: var(--gray-900); margin-bottom: 10px; }
.contact-form-desc { font-size: 14px; color: var(--gray-500); margin-bottom: 30px; }
.contact-form { display: flex; flex-direction: column; gap: 20px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 20px; }
.form-group { display: flex; flex-direction: column; }
.form-group.full { }
.form-group label { font-size: 13px; color: var(--gray-600); margin-bottom: 6px; }
.form-group input, .form-group textarea {
    padding: 12px 16px; border: 1.5px solid var(--gray-200); border-radius: var(--radius);
    font-size: 14px; font-family: var(--font-cn); color: var(--gray-800);
    transition: var(--transition); resize: vertical;
}
.form-group input:focus, .form-group textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(0,60,143,0.08); }
.contact-submit-btn {
    padding: 14px 50px; background: var(--primary); color: var(--white);
    font-size: 15px; font-weight: 500; border-radius: var(--radius);
    letter-spacing: 2px; transition: var(--transition); align-self: flex-start;
}
.contact-submit-btn:hover { background: var(--primary-light); transform: translateY(-1px); }

/* ========== Footer ========== */
.footer { background: var(--gray-900); color: var(--gray-400); padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1fr 2fr; gap: 60px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.footer-logo { margin-bottom: 20px; }
.footer-logo img { filter: brightness(2); }
.footer-qr { text-align: center; }
.footer-qr img { width: 100px; border-radius: var(--radius); margin-bottom: 6px; }
.footer-qr span { font-size: 12px; color: var(--gray-500); }

.footer-contact-col h4, .footer-nav-group h4 { font-size: 15px; font-weight: 600; color: var(--white); margin-bottom: 16px; }
.footer-contact-col p { font-size: 13px; margin-bottom: 8px; line-height: 1.6; display: flex; align-items: flex-start; gap: 6px; }
.footer-contact-label { color: rgba(255,255,255,0.62); flex-shrink: 0; }
.footer-consult-btn {
    display: inline-block; margin-top: 12px; padding: 8px 20px;
    border: 1px solid rgba(255,255,255,0.2); color: var(--white);
    font-size: 13px; border-radius: 2px; transition: var(--transition);
}
.footer-consult-btn:hover { border-color: var(--accent); color: var(--accent); }
.footer-nav-col { display: grid; grid-template-columns: repeat(6, 1fr); gap: 20px; }
.footer-nav-group a { display: block; font-size: 13px; color: var(--gray-500); padding: 3px 0; transition: var(--transition); }
.footer-nav-group a:hover { color: var(--white); padding-left: 4px; }
.footer-bottom { padding: 20px 0; display: flex; justify-content: space-between; font-size: 12px; color: var(--gray-600); }

/* ========== Back to Top ========== */
.back-to-top {
    position: fixed; bottom: 100px; right: 30px; width: 44px; height: 44px;
    background: var(--primary); color: var(--white); border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    z-index: 999; opacity: 0; visibility: hidden; transition: var(--transition);
    box-shadow: var(--shadow-md);
}
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { background: var(--primary-light); transform: translateY(-2px); }

/* ========== Side Widget ========== */
.side-widget { position: fixed; right: 0; top: 50%; transform: translateY(-50%); z-index: 998; display: flex; flex-direction: column; gap: 1px; }
.side-widget-item {
    width: 48px; height: 48px; background: var(--primary); color: var(--white);
    display: flex; align-items: center; justify-content: center;
    transition: var(--transition); position: relative;
}
.side-widget-item:first-child { border-radius: 4px 0 0 0; }
.side-widget-item:last-child { border-radius: 0 0 0 4px; }
.side-widget-item:hover { background: var(--primary-light); }
.side-qr-popup {
    position: absolute; right: 56px; top: 50%; transform: translateY(-50%);
    background: var(--white); padding: 16px; border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl); opacity: 0; visibility: hidden;
    transition: var(--transition); text-align: center;
}
.side-widget-qr:hover .side-qr-popup { opacity: 1; visibility: visible; }
.side-qr-popup img { width: 120px; border-radius: var(--radius); margin-bottom: 6px; }
.side-qr-popup span { font-size: 12px; color: var(--gray-500); white-space: nowrap; }

/* ========== Scroll Animations ========== */
.reveal { opacity: 0; transform: translateY(40px); transition: opacity 0.8s ease, transform 0.8s ease; }
.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; }

/* ========== Search Modal ========== */
.search-modal {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.6); backdrop-filter: blur(4px);
    z-index: 2000; display: flex; align-items: flex-start; justify-content: center;
    padding-top: 20vh; opacity: 0; visibility: hidden; transition: var(--transition);
}
.search-modal.open { opacity: 1; visibility: visible; }
.search-modal-inner {
    width: 90%; max-width: 600px; background: var(--white);
    border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-xl);
    transform: translateY(-20px); transition: transform 0.3s ease;
}
.search-modal.open .search-modal-inner { transform: translateY(0); }
.search-input-wrap { display: flex; align-items: center; }
.search-input-wrap input {
    flex: 1; padding: 18px 24px; font-size: 16px; border: none; outline: none;
    font-family: var(--font-cn); color: var(--gray-800);
}
.search-submit-btn { padding: 18px 24px; color: var(--gray-400); transition: var(--transition); }
.search-submit-btn:hover { color: var(--primary); }

/* Mobile Nav */
.mobile-nav-overlay { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.5); z-index: 1001; opacity: 0; transition: opacity 0.3s ease; pointer-events: none; }
.mobile-nav-overlay.open { opacity: 1; pointer-events: auto; }
.mobile-nav { position: fixed; top: 0; right: -300px; width: 300px; height: 100%; background: var(--white); z-index: 1002; padding: 80px 24px 24px; transition: right 0.3s ease; overflow-y: auto; }
.mobile-nav.open { right: 0; }
.mobile-nav-close { position: absolute; top: 20px; right: 20px; width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; font-size: 24px; color: var(--gray-700); }
.mobile-nav a { display: block; padding: 14px 0; font-size: 16px; color: var(--gray-700); border-bottom: 1px solid var(--gray-100); }
.mobile-nav a:hover { color: var(--primary); }

/* ========== Responsive ========== */
@media (max-width: 1200px) {
    .footer-nav-col { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 1024px) {
    .container { padding: 0 24px; }
    .products-grid { grid-template-columns: 1fr; }
    .product-card.large { grid-column: span 1; grid-template-columns: 1fr; }
    .products-page-grid { grid-template-columns: 1fr; }
    .product-sidebar { position: static; }
    .sidebar-cat-list { display: flex; flex-wrap: wrap; gap: 0; }
    .sidebar-cat { flex: none; border-bottom: none; border-right: 1px solid var(--gray-100); padding: 10px 16px; font-size: 13px; }
    .app-card { min-width: calc(50% - 10px); }
    .about-preview-grid, .about-full-grid, .about-intro-grid, .contact-page-grid { grid-template-columns: 1fr; gap: 40px; }
    .news-grid, .app-full-grid, .app-page-grid { grid-template-columns: repeat(2, 1fr); }
    .cert-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .footer-nav-col { grid-template-columns: repeat(3, 1fr); }
    .about-stats { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .main-nav { display: none; }
    .mobile-menu-btn { display: flex; }
    .mobile-nav-overlay { display: block; }
    .header-phone { display: none; }
    .header-top { display: none; }
    .header-inner { height: 64px; }
    .logo-img-dark, .logo-img-light { height: 40px; }
    .logo-text-cn { font-size: 16px; letter-spacing: 1px; }
    .logo-text-en { font-size: 9px; letter-spacing: 1.5px; }
    .header-search-btn { width: 38px; height: 38px; }
    .header-search-btn svg { width: 18px; height: 18px; }
    .hero-title { font-size: 28px; }
    .hero-desc { font-size: 14px; }
    .hero-arrow { display: none; }
    .hero-scroll { display: none; }
    .section { padding: 60px 0; }
    .section-title-cn { font-size: 24px; }
    .app-card { min-width: calc(100% - 0px); }
    .news-grid, .app-full-grid, .app-page-grid { grid-template-columns: 1fr; }
    .culture-grid { grid-template-columns: 1fr; }
    .product-list { grid-template-columns: 1fr 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-nav-col { grid-template-columns: repeat(2, 1fr); }
    .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
    .about-stats { grid-template-columns: repeat(2, 1fr); }
    .form-row { grid-template-columns: 1fr; }
    .form-row-3 { grid-template-columns: 1fr; }
    .cert-grid { grid-template-columns: 1fr 1fr; }
    .news-full-item { flex-direction: column; }
    .news-full-img { width: 100%; }
    .page-banner { height: 240px; }
    .page-banner-content h1 { font-size: 26px; }
    .side-widget { display: none; }
    .contact-qr-section { flex-direction: column; align-items: flex-start; }
    .detail-grid { grid-template-columns: 1fr; }
    .news-detail-grid { grid-template-columns: 1fr; }
    .app-detail-banner { flex-direction: column; }
    .app-detail-banner-img { width: 100%; }
    .app-article-card { flex-direction: column; }
    .app-article-img { width: 100%; }
}

/* ========== Product Detail Page ========== */
.detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: start; margin-bottom: 60px; }
.detail-img-wrap { background: var(--gray-50); border-radius: var(--radius-lg); padding: 40px; display: flex; align-items: center; justify-content: center; }
.detail-img-wrap img, .detail-img-wrap video { max-width: 100%; max-height: 400px; object-fit: contain; display: block; }
.detail-title { font-size: 26px; font-weight: 700; color: var(--gray-900); margin-bottom: 12px; letter-spacing: 1px; }
.detail-divider { width: 40px; height: 3px; background: var(--primary); margin-bottom: 20px; }
.detail-desc { font-size: 15px; color: var(--gray-600); line-height: 1.8; margin-bottom: 24px; }
.detail-highlights { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 28px; }
.detail-highlight-item { display: flex; align-items: center; gap: 6px; padding: 6px 14px; background: rgba(0,60,143,0.05); border-radius: 20px; font-size: 13px; color: var(--primary); font-weight: 500; }
.detail-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.detail-btn-primary { display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px; background: var(--primary); color: var(--white); border-radius: var(--radius); font-size: 14px; font-weight: 500; transition: var(--transition); }
.detail-btn-primary:hover { background: var(--primary-light); transform: translateY(-1px); }
.detail-btn-outline { display: inline-flex; align-items: center; gap: 6px; padding: 12px 28px; border: 1.5px solid var(--gray-300); color: var(--gray-600); border-radius: var(--radius); font-size: 14px; transition: var(--transition); cursor: pointer; background: none; font-family: var(--font-cn); }
.detail-btn-outline:hover { border-color: var(--primary); color: var(--primary); }

.detail-specs-section { margin-bottom: 60px; }
.detail-specs-section h2 { font-size: 22px; font-weight: 700; color: var(--gray-900); margin-bottom: 8px; }
.detail-specs-divider { width: 30px; height: 2px; background: var(--primary); margin-bottom: 24px; }
.detail-specs-table { width: 100%; border-collapse: collapse; table-layout: fixed; }
.detail-specs-table tr { border-bottom: 1px solid var(--gray-100); }
.detail-specs-table tr:hover { background: var(--gray-50); }
.detail-specs-table td { padding: 14px 20px; font-size: 14px; word-wrap: break-word; vertical-align: top; }
.spec-label { width: 220px; color: var(--gray-500); font-weight: 500; }
.spec-value { color: var(--gray-800); }
.spec-desc { color: var(--gray-700); padding-left: 20px; position: relative; }
.spec-desc::before { content: '•'; position: absolute; left: 8px; color: var(--primary); font-weight: 700; }

.detail-related { margin-bottom: 60px; }
.detail-related h3 { font-size: 22px; font-weight: 700; color: var(--gray-900); margin-bottom: 24px; }
.detail-related-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.detail-related-card { background: var(--gray-50); border-radius: var(--radius-lg); overflow: hidden; cursor: pointer; transition: var(--transition); text-align: center; }
.detail-related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.detail-related-img { padding: 20px; aspect-ratio: 1; display: flex; align-items: center; justify-content: center; }
.detail-related-img img, .detail-related-img video { max-height: 120px; object-fit: contain; display: block; }
.detail-related-card p { padding: 12px 16px; font-size: 13px; font-weight: 500; color: var(--gray-700); }

.detail-inquiry { background: var(--gray-50); border-radius: var(--radius-lg); padding: 40px; }
.detail-inquiry h3 { font-size: 20px; font-weight: 700; color: var(--gray-900); margin-bottom: 8px; }
.detail-inquiry > p { font-size: 14px; color: var(--gray-500); margin-bottom: 24px; }
.detail-inquiry-form input, .detail-inquiry-form textarea { padding: 12px 16px; border: 1.5px solid var(--gray-200); border-radius: var(--radius); font-size: 14px; font-family: var(--font-cn); color: var(--gray-800); transition: var(--transition); width: 100%; }
.detail-inquiry-form input:focus, .detail-inquiry-form textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(0,60,143,0.08); }
.detail-inquiry-form .form-row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.detail-inquiry-form textarea { margin-bottom: 16px; resize: vertical; }

/* ========== App Detail Page ========== */
.app-detail-banner { display: flex; gap: 0; border-radius: var(--radius-lg); overflow: hidden; margin-bottom: 50px; background: var(--gray-50); }
.app-detail-banner-img { width: 50%; flex-shrink: 0; }
.app-detail-banner-img img, .app-detail-banner-img video { width: 100%; height: 100%; object-fit: cover; min-height: 280px; display: block; }
.app-detail-banner-content { padding: 40px; display: flex; flex-direction: column; justify-content: center; }
.app-detail-banner-content h2 { font-size: 26px; font-weight: 700; color: var(--gray-900); margin-bottom: 12px; }
.app-detail-banner-line { width: 40px; height: 3px; background: var(--primary); margin-bottom: 16px; }
.app-detail-banner-content p { font-size: 15px; color: var(--gray-600); line-height: 1.8; }

.app-detail-section-header { margin-bottom: 30px; }
.app-detail-section-header h2 { font-size: 22px; font-weight: 700; color: var(--gray-900); margin-bottom: 4px; }
.app-detail-section-en { font-family: var(--font-en); font-size: 13px; color: var(--gray-400); letter-spacing: 2px; }

.app-detail-articles { display: flex; flex-direction: column; gap: 20px; }
.app-article-card { display: block; padding: 24px; background: var(--white); border: 1px solid var(--gray-100); border-radius: var(--radius-lg); transition: var(--transition); margin-bottom: 24px; }
.app-article-card:hover { box-shadow: var(--shadow-md); border-color: transparent; }
.app-article-card .app-article-info { padding-top: 16px; }
.app-article-tag { display: inline-block; padding: 3px 10px; background: rgba(0,60,143,0.08); color: var(--primary); font-size: 12px; border-radius: 12px; margin-bottom: 8px; }
.app-article-info h3 { font-size: 18px; font-weight: 600; color: var(--gray-900); margin-bottom: 8px; line-height: 1.5; }
.app-article-info p { font-size: 14px; color: var(--gray-500); line-height: 1.7; }

/* 应用案例图片展示 */
.app-article-img-single { width: 100%; border-radius: var(--radius); overflow: hidden; }
.app-article-img-single img, .app-article-img-single video { width: 100%; max-height: 480px; object-fit: cover; display: block; background: var(--gray-900); }

.app-article-img-gallery { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; }
.app-article-img-gallery .gal-item { border-radius: var(--radius); overflow: hidden; aspect-ratio: 4/3; }
.app-article-img-gallery .gal-item img, .app-article-img-gallery .gal-item video { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; display: block; background: var(--gray-900); }
.app-article-img-gallery .gal-item:hover img { transform: scale(1.05); }
.app-article-img-gallery .gal-main { grid-column: span 2; aspect-ratio: 16/9; }

@media (max-width: 768px) {
    .app-article-img-gallery .gal-main { grid-column: span 1; }
}

.app-article-img-placeholder { background: var(--gray-50); border-radius: var(--radius); aspect-ratio: 16/9; }
.app-article-info { flex: 1; }
.app-article-info h3 { font-size: 16px; font-weight: 600; color: var(--gray-900); margin-bottom: 10px; line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.app-article-info p { font-size: 14px; color: var(--gray-500); line-height: 1.7; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.app-detail-empty { padding: 60px 20px; text-align: center; color: var(--gray-400); font-size: 15px; }

/* ========== News Detail Page ========== */
.news-detail-grid { display: grid; grid-template-columns: 1fr 300px; gap: 40px; }
.news-detail-title { font-size: 24px; font-weight: 700; color: var(--gray-900); margin-bottom: 16px; line-height: 1.5; }
.news-detail-meta { display: flex; gap: 16px; margin-bottom: 24px; padding-bottom: 16px; border-bottom: 1px solid var(--gray-200); }
.news-detail-date { display: flex; align-items: center; gap: 4px; font-size: 14px; color: var(--gray-400); }
.news-detail-content { font-size: 15px; color: var(--gray-700); line-height: 2; }
.news-detail-content p { margin-bottom: 16px; }
.news-detail-content img { max-width: 100%; border-radius: var(--radius); margin: 16px 0; }
.news-detail-img { margin: 20px 0; }
.news-detail-img img { max-width: 100%; border-radius: var(--radius-lg); }
.news-info-box { background: var(--gray-50); border-left: 3px solid var(--primary); padding: 16px 20px; margin: 20px 0; border-radius: 0 var(--radius) var(--radius) 0; }
.news-info-box p { margin-bottom: 4px; font-size: 14px; color: var(--gray-700); }
.news-detail-back { margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--gray-200); }
.news-detail-sidebar { position: sticky; top: 100px; }
.news-detail-sidebar h3 { font-size: 18px; font-weight: 700; color: var(--gray-900); margin-bottom: 20px; padding-bottom: 12px; border-bottom: 2px solid var(--primary); }
.news-sidebar-list { display: flex; flex-direction: column; gap: 16px; }
.news-sidebar-item { padding: 12px 0; border-bottom: 1px solid var(--gray-100); cursor: pointer; transition: var(--transition); }
.news-sidebar-item:hover { padding-left: 4px; }
.news-sidebar-item h4 { font-size: 14px; font-weight: 500; color: var(--gray-700); line-height: 1.5; margin-bottom: 4px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-sidebar-item:hover h4 { color: var(--primary); }
.news-sidebar-item span { font-family: var(--font-en); font-size: 12px; color: var(--gray-400); }

/* ========== Announcement Bar ========== */
.announcement-bar { background: #e60013; color: white; text-align: center; padding: 8px 20px; font-size: 13px; display: none; position: relative; z-index: 101; }
.announcement-bar.visible { display: block; }
.announcement-bar a { color: white; text-decoration: underline; margin-left: 8px; }
.announcement-bar .close-btn { float: right; cursor: pointer; opacity: 0.7; font-size: 16px; line-height: 1; }
.announcement-bar .close-btn:hover { opacity: 1; }

/* ========== Footer Social ========== */
.footer-social { display: flex; align-items: center; justify-content: center; gap: 16px; padding: 16px 0; border-top: 1px solid rgba(255,255,255,0.1); margin-top: 20px; }
.footer-social-item { width: 36px; height: 36px; border-radius: 50%; background: rgba(255,255,255,0.1); display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,0.7); transition: all 0.2s; }
.footer-social-item:hover { background: rgba(255,255,255,0.2); color: #fff; }
.footer-social-item svg { fill: currentColor; }
.footer-social-qr { display: none; position: absolute; bottom: 100%; left: 50%; transform: translateX(-50%); background: #fff; padding: 8px; border-radius: 8px; box-shadow: 0 4px 20px rgba(0,0,0,0.3); margin-bottom: 8px; text-align: center; }
.footer-social-item:hover .footer-social-qr { display: block; }
.footer-social-qr img { width: 120px; height: 120px; display: block; }
.footer-social-qr span { font-size: 12px; color: #666; margin-top: 4px; display: block; }

/* ========== Final Mobile Overrides ==========
   详情页样式位于前面的响应式规则之后，移动端修正规则需要放在文件末尾。 */
@media (max-width: 768px) {
    .hero-content {
        max-width: 100%;
        padding: 0 24px;
    }
    .hero-subtitle {
        font-size: clamp(14px, 3.8vw, 16px);
        letter-spacing: 3.2px;
        margin-bottom: 16px;
        opacity: 0.95;
    }
    .hero-title {
        font-size: clamp(23px, 6.1vw, 25px);
        letter-spacing: 0.5px;
        line-height: 1.22;
        max-width: min(390px, calc(100vw - 24px));
        margin-left: auto;
        margin-right: auto;
        text-wrap: balance;
    }
    .hero-desc {
        line-height: 1.8;
        letter-spacing: 1px;
        margin-bottom: 32px;
    }
    .hero-btn {
        padding: 12px 28px;
    }

    .detail-grid,
    .news-detail-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }
    .detail-img-wrap {
        padding: 24px;
    }
    .detail-img-wrap img {
        max-height: 280px;
    }
    .detail-title {
        font-size: 24px;
        line-height: 1.35;
    }
    .detail-actions {
        flex-direction: column;
        align-items: stretch;
    }
    .detail-btn-primary,
    .detail-btn-outline {
        width: 100%;
        justify-content: center;
        text-align: center;
    }
    .detail-related-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
    .detail-inquiry {
        padding: 24px;
    }
    .detail-inquiry-form .form-row-3 {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    .detail-specs-table {
        table-layout: auto;
    }
    .detail-specs-table tr,
    .detail-specs-table td {
        display: block;
        width: 100%;
    }
    .detail-specs-table td {
        padding: 12px 14px;
    }
    .spec-label {
        width: auto;
        background: var(--gray-50);
        color: var(--gray-600);
    }
    .spec-value {
        padding-top: 0;
    }

    .app-detail-banner {
        flex-direction: column;
    }
    .app-detail-banner-img {
        width: 100%;
    }
    .app-detail-banner-content {
        padding: 24px;
    }
    .app-article-card {
        padding: 18px;
    }
    .news-detail-sidebar {
        position: static;
    }
    .news-detail-meta {
        flex-wrap: wrap;
    }
}

@media (max-width: 480px) {
    .hero-subtitle {
        font-size: 14px;
        letter-spacing: 3px;
    }
    .hero-title {
        font-size: clamp(22px, 6.4vw, 24px);
        max-width: calc(100vw - 24px);
    }
    .product-list {
        gap: 16px;
    }
    .product-list-img {
        padding: 16px;
    }
    .product-list-info {
        padding: 14px 12px;
    }
    .product-list-info h3 {
        font-size: 14px;
    }
}