/* ==========================================================================
   洛阳阿尔法新材料有限公司 · 前台样式

   设计还原自「万小智」React 版本的 Tailwind 样式体系：
   主色 #2C5282 / 强调色 #3B82F6 / 深蓝标题 #1E3A5F，
   圆角 8px，卡片阴影 + 悬停上浮，栅格断点 640 / 768 / 1024 / 1280。

   目录：
     01 设计变量
     02 基础重置
     03 布局与通用组件
     04 顶部导航
     05 页脚
     06 首页 · 首屏轮播
     07 首页 · 各内容板块
     08 产品中心
     09 技术实力
     10 应用领域
     11 关于我们
     12 联系我们
     13 新闻动态
     14 动画
     15 打印与无障碍
   ========================================================================== */

/* ------------------------------------------------------------------
   01 设计变量
   ------------------------------------------------------------------ */
:root {
    /* 品牌色 */
    --brand:          #2C5282;   /* 主色：导航 / 页脚 / 板块标题 */
    --brand-accent:   #3B82F6;   /* 强调色：按钮 / 图标 / 链接 */
    --brand-accent-h: #2563EB;   /* 强调色悬停 */
    --brand-deep:     #1a4e7a;   /* 主色深一档（按钮悬停） */
    --brand-navy:     #1E3A5F;   /* 深蓝：页面 h1 / h2 / 数值 */
    --brand-tint:     rgba(59, 130, 246, .10); /* 图标底色 */

    /* 中性色 */
    --gray-50:  #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;

    /* 阴影（对应 Tailwind shadow-md / lg / xl / sm） */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / .10), 0 2px 4px -2px rgb(0 0 0 / .10);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .10), 0 4px 6px -4px rgb(0 0 0 / .10);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / .10), 0 8px 10px -6px rgb(0 0 0 / .10);

    /* 圆角 */
    --radius:    .25rem;
    --radius-lg: .5rem;

    /* 容器 */
    --container: 1280px;

    /* 跑马灯速度（像素/秒）：首页合作伙伴与关于我们厂区环境共用同一节奏，
       实际时长由 site.js 按内容宽度换算，此变量仅作为统一基准。 */
    --marquee-speed: 40;
}

/* ------------------------------------------------------------------
   02 基础重置（对齐 Tailwind Preflight）
   ------------------------------------------------------------------ */
*, *::before, *::after { box-sizing: border-box; border: 0 solid var(--gray-200); }

html {
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    background: #fff;
    color: var(--gray-900);
    font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB",
                 "Helvetica Neue", Helvetica, Arial, "Noto Sans SC", sans-serif;
    font-size: 16px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 { margin: 0; font-size: inherit; font-weight: inherit; }
p, figure, blockquote, dl, dd { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }

a { color: inherit; text-decoration: none; }
img, svg, video { display: block; max-width: 100%; height: auto; }
button, input, textarea, select { font: inherit; color: inherit; margin: 0; }
button { background: none; border: 0; cursor: pointer; }
textarea { resize: vertical; }

/* 滚动条（细节优化，不影响设计还原） */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: rgba(44, 82, 130, .35); border-radius: 999px; }
::-webkit-scrollbar-thumb:hover { background: rgba(44, 82, 130, .55); }

/* ------------------------------------------------------------------
   03 布局与通用组件
   ------------------------------------------------------------------ */
.container {
    width: 100%;
    max-width: var(--container);
    margin-inline: auto;
    padding-inline: 1rem;
}

/* 板块间距：移动端 py-12 / 桌面 py-16 与 py-20 两种节奏 */
.section        { padding-block: 3rem; }
.section-lg     { padding-block: 3rem; }
.section-tint   { background: var(--gray-50); }

/* 板块标题组 */
.section-head { text-align: center; margin-bottom: 2rem; }
.section-head h1,
.section-head h2 {
    font-size: 1.5rem;
    line-height: 2rem;
    font-weight: 700;
    color: var(--brand);
    margin-bottom: .75rem;
}
.section-head p {
    font-size: .875rem;
    line-height: 1.25rem;
    color: var(--gray-600);
}
.section-head--navy h2 { color: var(--brand-navy); }

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .5rem;
    padding: .75rem 2rem;
    border-radius: var(--radius-lg);
    font-size: 1rem;
    line-height: 1.5rem;
    font-weight: 500;
    white-space: nowrap;
    transition: background-color .2s ease, transform .2s ease, box-shadow .2s ease, color .2s ease;
}
.btn-primary               { background: var(--brand-accent); color: #fff; }
.btn-primary:hover         { background: var(--brand-accent-h); transform: scale(1.02); }
.btn-navy                  { background: var(--brand-navy); color: #fff; }
.btn-navy:hover            { background: var(--brand); transform: scale(1.02); }
.btn-brand                 { background: var(--brand); color: #fff; }
.btn-brand:hover           { background: var(--brand-deep); transform: scale(1.02); }
.btn-ghost                 { background: rgba(255, 255, 255, .10); color: #fff; border: 1px solid rgba(255, 255, 255, .30); backdrop-filter: blur(4px); }
.btn-ghost:hover           { background: rgba(255, 255, 255, .20); }
.btn-lg                    { padding: 1rem 2rem; font-size: 1.125rem; line-height: 1.75rem; font-weight: 600; }
.btn-block                 { width: 100%; }
.btn:disabled              { opacity: .5; cursor: not-allowed; transform: none; }

/* 图标圆底（对应 w-12 h-12 bg-[#3B82F6]/10 rounded-full） */
.icon-badge {
    width: 3rem; height: 3rem;
    flex: 0 0 auto;
    display: flex; align-items: center; justify-content: center;
    border-radius: 9999px;
    background: var(--brand-tint);
    color: var(--brand-accent);
}
.icon-badge svg { width: 1.5rem; height: 1.5rem; }

/* 文本截断（line-clamp） */
.clamp-2, .clamp-3 {
    display: -webkit-box;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.clamp-2 { -webkit-line-clamp: 2; line-clamp: 2; }
.clamp-3 { -webkit-line-clamp: 3; line-clamp: 3; }

/* 卡片 */
.card {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: box-shadow .3s ease, transform .3s ease;
}
.card:hover { box-shadow: var(--shadow-xl); transform: translateY(-.25rem); }
.card-media {
    position: relative;
    height: 10rem;
    background: #fff;
    overflow: hidden;
}
.card-media img {
    width: 100%; height: 100%;
    object-fit: contain;
    transition: transform .3s ease;
}
.card:hover .card-media img { transform: scale(1.05); }
.card-body { padding: 1rem; }
.card-title {
    font-size: 1rem;
    line-height: 1.5rem;
    font-weight: 700;
    color: var(--brand);
    margin-bottom: .5rem;
}
.card-text { font-size: .75rem; line-height: 1.25rem; color: var(--gray-600); margin-bottom: .75rem; }

/* 卡片底部文字链接 */
.text-link {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    color: var(--brand-accent);
    font-weight: 500;
    transition: gap .3s ease, color .2s ease;
}
.text-link:hover { gap: .75rem; color: var(--brand-accent-h); }
.text-link svg { width: .875rem; height: .875rem; }

/* 分段导航（面包屑） */
.breadcrumb {
    display: flex; align-items: center; flex-wrap: wrap; gap: .5rem;
    font-size: .875rem; color: var(--gray-500);
    margin-bottom: 1.5rem;
}
.breadcrumb a { color: var(--brand-accent); font-weight: 500; }
.breadcrumb a:hover { color: var(--brand-accent-h); }

/* ------------------------------------------------------------------
   04 顶部导航
   ------------------------------------------------------------------ */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: var(--brand);
    color: #fff;
    box-shadow: var(--shadow-md);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 5rem;
}

.logo { display: flex; align-items: center; flex: 0 0 auto; }
.logo img {
    display: block;
    width: auto;
    height: auto;
    max-width: 62vw;      /* 小屏：给右侧菜单按钮留出空间 */
    max-height: 3.25rem;
    object-fit: contain;
}

.nav { display: none; flex: 1 1 auto; align-items: center; justify-content: center; gap: 1.5rem; }
.nav-link {
    font-size: 1rem;
    font-weight: 500;
    color: #fff;
    white-space: nowrap;
    transition: color .2s ease;
}
.nav-link:hover,
.nav-link.is-active { color: var(--brand-accent); }

.header-actions { display: none; align-items: center; gap: .75rem; }

.lang-btn {
    display: inline-flex;
    align-items: center;
    gap: .375rem;
    padding: .5rem .625rem;
    border: 1px solid rgba(255, 255, 255, .20);
    border-radius: var(--radius);
    font-size: .75rem;
    line-height: 1rem;
    color: #fff;
    white-space: nowrap;
    transition: background-color .2s ease;
}
.lang-btn:hover { background: rgba(255, 255, 255, .10); }

.btn-consult { padding: .5rem 1rem; font-size: .75rem; line-height: 1rem; border-radius: var(--radius); }

.nav-toggle {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: .3rem;
    padding: .5rem;
    border-radius: var(--radius);
    transition: background-color .2s ease;
}
.nav-toggle:hover { background: rgba(255, 255, 255, .10); }
.nav-toggle span {
    display: block;
    width: 1.5rem;
    height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: transform .3s ease, opacity .2s ease;
}
.nav-toggle.is-open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* 移动端抽屉 */
.mobile-menu {
    background: var(--brand);
    border-top: 1px solid rgba(255, 255, 255, .10);
}
.mobile-menu[hidden] { display: none; }
.mobile-menu nav { padding: 1rem; display: flex; flex-direction: column; gap: .5rem; }
.mobile-link {
    display: block;
    padding: .75rem 1rem;
    border-radius: var(--radius);
    font-size: .875rem;
    font-weight: 500;
    color: #fff;
    transition: background-color .2s ease;
}
.mobile-link:hover { background: rgba(255, 255, 255, .05); }
.mobile-link.is-active { background: rgba(255, 255, 255, .10); color: var(--brand-accent); }
.mobile-menu-foot {
    margin-top: 1rem;
    padding: 1rem;
    border-top: 1px solid rgba(255, 255, 255, .10);
}
.mobile-menu-row {
    display: flex; align-items: center; justify-content: space-between;
    padding: .75rem 1rem;
    font-size: .875rem;
    color: var(--gray-300);
}
.mobile-menu-foot .btn { margin-top: .5rem; font-size: .875rem; }

/* ------------------------------------------------------------------
   05 页脚
   ------------------------------------------------------------------ */
.site-footer { background: var(--brand); color: #fff; }
.footer-inner { padding-block: 3rem; }

.footer-grid { display: grid; grid-template-columns: 1fr; gap: 2rem; }

.footer-logo {
    display: block;
    width: auto;
    height: auto;
    max-width: min(17.5rem, 100%);
    max-height: 3.5rem;
    object-fit: contain;
    margin-bottom: 1rem;
}
.footer-brand p {
    font-size: .875rem;
    line-height: 1.625;
    color: var(--gray-300);
    max-width: 300px;
}
.footer-col h4 { font-size: 1rem; font-weight: 600; margin-bottom: 1rem; }
.footer-links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .5rem; }
.footer-links a { font-size: .875rem; color: var(--gray-300); transition: color .2s ease; }
.footer-links a:hover { color: #fff; }

.footer-contact { display: flex; flex-direction: column; gap: .75rem; }
.footer-contact li { display: flex; align-items: flex-start; gap: .75rem; font-size: .875rem; }
.footer-contact svg { width: 1rem; height: 1rem; flex: 0 0 auto; margin-top: .2rem; color: var(--brand-accent); }
.footer-contact a, .footer-contact span { color: var(--gray-300); transition: color .2s ease; }
.footer-contact a:hover { color: #fff; }

.footer-bottom {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, .10);
    text-align: center;
    font-size: .875rem;
    color: var(--gray-400);
}
.footer-record { margin-top: .5rem; display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: .75rem; }
.footer-record a {
    display: inline-flex; align-items: center; gap: .35rem;
    color: var(--gray-400);
    transition: color .2s ease;
}
.footer-record a:hover { color: #fff; }
.footer-record img { width: 1rem; height: 1rem; }

/* ------------------------------------------------------------------
   06 首页 · 首屏轮播
   ------------------------------------------------------------------ */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: var(--brand);
}
.hero-slides { position: absolute; inset: 0; }
.hero-slide {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0;
    transition: opacity 1s ease-in-out;
}
.hero-slide.is-active { opacity: 1; }
.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to right, rgba(44, 82, 130, .60), rgba(44, 82, 130, .40));
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    padding-inline: .5rem;
}
.hero-slogan {
    font-size: 1.875rem;
    line-height: 1.25;
    font-weight: 700;
    color: #fff;
    letter-spacing: .025em;
    margin-bottom: 1.5rem;
}
.hero-actions {
    display: flex;
    flex-direction: column;
    gap: .75rem;
    justify-content: center;
    padding-inline: 1rem;
}
.hero-actions .btn { box-shadow: var(--shadow-lg); }
.hero-actions .btn-ghost { box-shadow: none; }

.hero-stats {
    margin-top: 2rem;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
    max-width: 42rem;
    margin-inline: auto;
    padding-inline: 1rem;
}
.hero-stat-value {
    font-size: 1.5rem; line-height: 2rem; font-weight: 700; color: var(--brand-accent);
    font-variant-numeric: tabular-nums;
}
.hero-stat-label { font-size: .75rem; line-height: 1rem; color: var(--gray-300); margin-top: .25rem; }

.hero-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 20;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: .75rem;
    border-radius: 9999px;
    background: rgba(255, 255, 255, .10);
    border: 1px solid rgba(255, 255, 255, .30);
    color: #fff;
    backdrop-filter: blur(4px);
    transition: background-color .2s ease;
}
.hero-arrow:hover { background: rgba(255, 255, 255, .20); }
.hero-arrow svg { width: 1.5rem; height: 1.5rem; }
.hero-arrow-prev { left: 1rem; }
.hero-arrow-next { right: 1rem; }

.hero-dots {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 20;
    display: flex;
    gap: .75rem;
}
.hero-dots button {
    width: .75rem;
    height: .75rem;
    border-radius: 9999px;
    background: rgba(255, 255, 255, .50);
    transition: all .3s ease;
}
.hero-dots button:hover { background: rgba(255, 255, 255, .80); }
.hero-dots button.is-active { width: 2rem; background: var(--brand-accent); }

/* ------------------------------------------------------------------
   07 首页 · 各内容板块
   ------------------------------------------------------------------ */
/* 7.1 企业资质 */
.qual-grid { display: grid; grid-template-columns: 1fr; gap: 1rem; }
.qual-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    transition: box-shadow .2s ease;
}
.qual-card:hover { box-shadow: var(--shadow-lg); }
.qual-card .icon-badge { margin-inline: auto; margin-bottom: .75rem; }
.qual-card h3 {
    font-size: 1rem;
    line-height: 1.5rem;
    font-weight: 600;
    color: var(--brand);
    text-align: center;
    margin-bottom: .5rem;
}
.qual-card p {
    font-size: .75rem;
    line-height: 1.25rem;
    color: var(--gray-600);
    text-align: center;
}
.qual-value {
    margin-top: .75rem;
    text-align: center;
    font-size: 1.25rem;
    line-height: 1.75rem;
    font-weight: 700;
    color: var(--brand-accent);
}

/* 7.2 产品 / 新闻 / 应用 栅格 */
.grid-3 { display: grid; grid-template-columns: 1fr; gap: 1rem; }
.grid-4 { display: grid; grid-template-columns: 1fr; gap: 1rem; }
.section-cta { text-align: center; margin-top: 3rem; }

/* 7.3 应用领域卡片（悬停浮层） */
.app-tile {
    position: relative;
    height: 12rem;
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
}
.app-tile img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    background: #fff;
    transition: transform .3s ease;
}
.app-tile:hover img { transform: scale(1.05); }
.app-tile-cover {
    position: absolute;
    inset: 0;
    background: rgba(44, 82, 130, .60);
    opacity: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-inline: 1rem;
    transition: opacity .3s ease;
}
.app-tile:hover .app-tile-cover { opacity: 1; }
.app-tile-cover > div { text-align: center; color: #fff; transform: translateY(1rem); transition: transform .3s ease; }
.app-tile:hover .app-tile-cover > div { transform: translateY(0); }
.app-tile-cover h3 { font-size: 1rem; line-height: 1.5rem; font-weight: 700; margin-bottom: .5rem; }
.app-tile-cover p { font-size: .75rem; line-height: 1.25rem; color: var(--gray-200); }
.app-tile-label {
    position: absolute;
    left: 0; right: 0; bottom: 0;
    padding: .75rem;
    background: linear-gradient(to top, rgba(0, 0, 0, .60), transparent);
    transition: opacity .3s ease;
}
.app-tile:hover .app-tile-label { opacity: 0; }
.app-tile-label h3 { font-size: .875rem; line-height: 1.25rem; font-weight: 600; color: #fff; }

/* 7.4 合作伙伴跑马灯 */
.marquee-mask {
    overflow: hidden;
    /* 左右边缘淡出，滚动衔接更自然 */
    -webkit-mask-image: linear-gradient(to right, transparent 0, #000 4%, #000 96%, transparent 100%);
            mask-image: linear-gradient(to right, transparent 0, #000 4%, #000 96%, transparent 100%);
}
.marquee-track {
    display: flex;
    width: max-content;
    will-change: transform;
    animation: marquee-scroll 20s linear infinite;
}
.marquee-mask:hover .marquee-track { animation-play-state: paused; }
.partner-cell { flex: 0 0 auto; width: 10rem; padding: .5rem; }
.partner-logo {
    height: 4rem;
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: .5rem;
}
.partner-logo img { max-width: 100%; max-height: 100%; object-fit: contain; }

/* ------------------------------------------------------------------
   08 产品中心
   ------------------------------------------------------------------ */
.page-hero { padding-block: 4rem; background: #fff; }
.page-hero--tint { background: var(--gray-50); }
.page-head { text-align: center; margin-bottom: 3rem; }
.page-head h1 { font-size: 2.25rem; line-height: 2.5rem; font-weight: 700; color: var(--brand-navy); margin-bottom: 1rem; }
.page-head p { font-size: 1.125rem; line-height: 1.75rem; color: var(--gray-600); }
.page-head--brand h1 { color: var(--brand); }

/* 性能指标 */
.metric-grid { display: grid; grid-template-columns: 1fr; gap: 1.5rem; margin-bottom: 4rem; }
.metric-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    text-align: center;
}
.metric-value { font-size: 1.875rem; line-height: 2.25rem; font-weight: 700; color: var(--brand-accent); margin-bottom: .5rem; }
.metric-label { color: var(--gray-600); }

/* 产品详情行（左右交替） */
.product-rows { display: flex; flex-direction: column; gap: 4rem; }
.product-row {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    align-items: center;
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}
.product-row-media { flex: 1 1 0; width: 100%; }
.product-row-media img {
    width: 100%;
    height: 16rem;
    object-fit: contain;
    background: #fff;
}
.product-row-body { flex: 1 1 0; width: 100%; padding: 2rem; }
.product-row-body h2 { font-size: 1.5rem; line-height: 2rem; font-weight: 700; color: var(--brand-navy); margin-bottom: 1rem; }
.product-row-body p { color: var(--gray-600); line-height: 1.625; margin-bottom: 1.5rem; }

/* 规格 / 特性小标签 */
.chip-row { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: 1.5rem; }
.chip {
    display: inline-flex; align-items: center; gap: .375rem;
    padding: .375rem .75rem;
    border-radius: 9999px;
    background: var(--gray-100);
    font-size: .8125rem;
    color: var(--gray-700);
}
.chip::before {
    content: "";
    width: .375rem; height: .375rem;
    border-radius: 9999px;
    background: var(--brand-accent);
}

/* 通用居中 CTA 区块 */
.cta-block {
    margin-top: 4rem;
    padding: 2rem;
    border-radius: var(--radius-lg);
    background: var(--gray-50);
    text-align: center;
}
.cta-block h3 { font-size: 1.5rem; line-height: 2rem; font-weight: 700; color: var(--brand-navy); margin-bottom: 1rem; }
.cta-block p { color: var(--gray-600); max-width: 42rem; margin: 0 auto 1.5rem; }

/* ------------------------------------------------------------------
   09 技术实力
   ------------------------------------------------------------------ */
.tech-partners { display: grid; grid-template-columns: 1fr; gap: 2rem; margin-bottom: 4rem; }
.tech-partner {
    background: var(--gray-50);
    border-left: 4px solid var(--brand-accent);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
}
.tech-partner .inner { display: flex; align-items: flex-start; gap: .75rem; }
.tech-partner h3 { font-size: 1.125rem; line-height: 1.75rem; font-weight: 700; color: var(--brand-navy); margin-bottom: .5rem; }
.tech-partner p { color: var(--gray-600); font-size: .875rem; line-height: 1.25rem; }

/* 技术页图标：与「专利成果」一致的裸线性图标（无圆底），
   尺寸对齐标题行高，颜色沿用强调色。 */
.tech-icon {
    flex: 0 0 auto;
    width: 1.5rem; height: 1.5rem;
    color: var(--brand-accent);
    margin-top: .125rem;
}

.tech-rows { display: flex; flex-direction: column; gap: 3rem; }
.tech-row { display: flex; flex-direction: column; gap: 2rem; align-items: center; }
.tech-row-media { flex: 1 1 0; width: 100%; }
.tech-row-media img {
    width: 100%;
    height: 16rem;
    object-fit: contain;
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}
.tech-row-placeholder {
    width: 100%; height: 16rem;
    background: var(--gray-200);
    border-radius: var(--radius-lg);
    display: flex; align-items: center; justify-content: center;
    color: var(--gray-400);
}
.tech-row-placeholder svg { width: 3rem; height: 3rem; }
.tech-row-body { flex: 1 1 0; width: 100%; padding: 1rem; }
.tech-row-head { display: flex; align-items: center; gap: .625rem; margin-bottom: .75rem; }
.tech-row-head .tech-icon { margin-top: 0; }
.tech-row-body h3 { font-size: 1.125rem; line-height: 1.75rem; font-weight: 700; color: var(--brand-navy); }
.tech-row-body p { color: var(--gray-600); font-size: .875rem; line-height: 1.625; }

/* 专利成果深色区块 */
.patent-block {
    background: var(--brand-navy);
    border-radius: var(--radius-lg);
    padding: 2rem;
    color: #fff;
    text-align: center;
}
.patent-head { display: flex; align-items: center; justify-content: center; gap: .75rem; margin-bottom: 1rem; }
.patent-head svg { width: 1.875rem; height: 1.875rem; }
.patent-head h2 { font-size: 1.5rem; line-height: 2rem; font-weight: 700; }
.patent-count { font-size: 2.25rem; line-height: 2.5rem; font-weight: 700; margin-bottom: .5rem; }
.patent-unit { color: var(--gray-300); margin-bottom: 1.5rem; }
.patent-desc { font-size: .875rem; line-height: 1.25rem; color: var(--gray-300); max-width: 42rem; margin-inline: auto; }

.section-cta-text { margin-top: 3rem; text-align: center; }
.section-cta-text h3 { font-size: 1.5rem; line-height: 2rem; font-weight: 700; color: var(--brand-navy); margin-bottom: 1rem; }
.section-cta-text p { color: var(--gray-600); margin-bottom: 1.5rem; }

/* ------------------------------------------------------------------
   10 应用领域
   ------------------------------------------------------------------ */
.app-card-grid { display: grid; grid-template-columns: 1fr; gap: 2rem; }
.app-card {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: box-shadow .3s ease;
}
.app-card:hover { box-shadow: var(--shadow-xl); }
.app-card-media { position: relative; height: 14rem; background: #fff; overflow: hidden; }
.app-card-media img {
    width: 100%; height: 100%;
    object-fit: contain;
    transition: transform .3s ease;
}
.app-card:hover .app-card-media img { transform: scale(1.05); }
.app-card-media::after {
    content: "";
    position: absolute; inset: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, .50), transparent);
}
.app-card-media h3 {
    position: absolute;
    left: 1rem; right: 1rem; bottom: 1rem;
    z-index: 1;
    font-size: 1.25rem;
    line-height: 1.75rem;
    font-weight: 700;
    color: #fff;
}
.app-card-body { padding: 1.5rem; }
.app-card-body > p { color: var(--gray-600); font-size: .875rem; line-height: 1.625; margin-bottom: 1rem; }
.app-benefits { display: flex; flex-direction: column; gap: .5rem; }
.app-benefits li {
    display: flex; align-items: center; gap: .5rem;
    font-size: .875rem; color: var(--gray-700);
}
.app-benefits li::before {
    content: "";
    width: .375rem; height: .375rem;
    flex: 0 0 auto;
    border-radius: 9999px;
    background: var(--brand-accent);
}

/* ------------------------------------------------------------------
   11 关于我们
   ------------------------------------------------------------------ */
/* 关键数据（移动端横向紧凑排布 → 桌面居中卡片） */
.about-stats { display: grid; grid-template-columns: 1fr; gap: .75rem; margin-bottom: 2.5rem; }
.about-stat {
    position: relative;
    display: flex;
    align-items: center;
    gap: 1rem;
    background: #fff;
    border: 1px solid var(--gray-100);
    border-radius: var(--radius-lg);
    padding: 1.125rem 1.25rem;
    box-shadow: var(--shadow-sm);
    transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
}
.about-stat::after {
    content: "";
    position: absolute;
    left: 1.25rem; right: 1.25rem; top: 0;
    height: 3px;
    border-radius: 0 0 3px 3px;
    background: linear-gradient(90deg, var(--brand), var(--brand-accent));
    opacity: 0;
    transition: opacity .3s ease;
}
.about-stat:hover { transform: translateY(-.25rem); box-shadow: var(--shadow-lg); border-color: rgba(59, 130, 246, .35); }
.about-stat:hover::after { opacity: 1; }
.about-stat-icon {
    flex: 0 0 auto;
    width: 3rem; height: 3rem;
    display: flex; align-items: center; justify-content: center;
    border-radius: 9999px;
    background: var(--brand-tint);
    color: var(--brand-accent);
    box-shadow: inset 0 0 0 1px rgba(59, 130, 246, .18);
    transition: background-color .3s ease, color .3s ease, transform .3s ease, box-shadow .3s ease;
}
.about-stat-icon svg { width: 1.5rem; height: 1.5rem; }
.about-stat:hover .about-stat-icon {
    background: var(--brand-accent);
    color: #fff;
    transform: scale(1.06);
    box-shadow: 0 6px 14px -4px rgba(59, 130, 246, .55);
}
.about-stat-body { flex: 1 1 auto; min-width: 0; }
.about-stat-value {
    font-size: 1.5rem;
    line-height: 2rem;
    font-weight: 700;
    color: var(--brand-navy);
    margin-bottom: .125rem;
    letter-spacing: -.01em;
}
.about-stat-label { color: var(--gray-600); font-size: .875rem; }

/* 区块标题：左对齐带色条 / 居中带装饰线 */
.about-block { margin-bottom: 3rem; }
.about-block > h2 {
    font-size: 1.25rem;
    line-height: 1.75rem;
    font-weight: 700;
    color: var(--brand-navy);
    margin-bottom: 1.25rem;
}
.about-block > h2:not(.is-center) { display: flex; align-items: center; gap: .625rem; }
.about-block > h2:not(.is-center)::before {
    content: "";
    flex: 0 0 auto;
    width: .25rem; height: 1.125rem;
    border-radius: 9999px;
    background: var(--brand-accent);
}
.about-block > h2.is-center { text-align: center; margin-bottom: 2rem; }
.about-block > h2.is-center::after {
    content: "";
    display: block;
    width: 3rem; height: 3px;
    margin: .75rem auto 0;
    border-radius: 9999px;
    background: linear-gradient(90deg, var(--brand), var(--brand-accent));
}

/* 企业简介：逐段输出，段间距统一 */
.about-intro {
    background: var(--gray-50);
    border: 1px solid var(--gray-100);
    border-left: 3px solid var(--brand-accent);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    color: var(--gray-700);
    font-size: .875rem;
    line-height: 1.75;
}
.about-intro > :not(:first-child) { margin-top: 1rem; }
.about-intro p { text-wrap: pretty; }
.about-intro > p:first-child { color: var(--gray-800); }

/* 发展历程：移动端纵向 / 桌面端横向交替 */
.timeline-mobile { display: flex; flex-direction: column; gap: 1.5rem; }
.timeline-mobile li { display: flex; gap: 1rem; align-items: flex-start; }
.timeline-mobile .tm-year { flex: 0 0 auto; width: 4rem; text-align: right; font-weight: 700; color: var(--brand-accent); font-size: 1rem; }
.timeline-mobile .tm-dot {
    flex: 0 0 auto;
    width: .75rem; height: .75rem;
    margin-top: .375rem;
    border-radius: 9999px;
    background: var(--brand-accent);
    border: 2px solid #fff;
    box-shadow: var(--shadow-md);
}
.timeline-mobile .tm-body {
    flex: 1 1 auto;
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    padding: 1rem;
    color: var(--gray-700);
    font-size: .875rem;
    line-height: 1.625;
}

.timeline-desktop { display: none; }

/* 经营理念 */
.values-grid { display: grid; grid-template-columns: 1fr; gap: 1rem; }
.value-card {
    background: #fff;
    border: 1px solid var(--gray-100);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    box-shadow: var(--shadow-sm);
    transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
}
.value-card:hover { transform: translateY(-.25rem); box-shadow: var(--shadow-lg); border-color: rgba(59, 130, 246, .30); }
.value-head { display: flex; align-items: center; gap: .75rem; margin-bottom: .75rem; }
.value-head .icon-badge { width: 2.5rem; height: 2.5rem; }
.value-head .icon-badge svg { width: 1.25rem; height: 1.25rem; }
.value-head h3 { font-size: 1.125rem; line-height: 1.75rem; font-weight: 700; color: var(--brand-navy); }
.value-card > p { color: var(--gray-600); line-height: 1.75; font-size: .875rem; }

/* 厂区环境跑马灯 */
.factory-track { animation-duration: 58s; }
.factory-cell { flex: 0 0 auto; width: 16rem; padding: .75rem; }
.factory-card {
    background: #fff;
    border: 1px solid var(--gray-100);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: box-shadow .3s ease;
}
.factory-card:hover { box-shadow: var(--shadow-xl); }
.factory-media { overflow: hidden; background: #fff; }
.factory-media img {
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 10;
    object-fit: cover;
    transition: transform .5s ease;
}
.factory-card:hover .factory-media img { transform: scale(1.05); }
.factory-card-body { padding: 1rem 1.125rem 1.125rem; }
.factory-card h3 { font-size: 1rem; font-weight: 600; color: var(--brand-navy); margin-bottom: .25rem; }
.factory-card p {
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    overflow: hidden;
    color: var(--gray-600);
    font-size: .8125rem;
    line-height: 1.5;
}

/* 参观考察 CTA */
.about-cta {
    margin-top: 3rem;
    padding: 2.25rem 1.5rem;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--brand-navy) 0%, var(--brand) 55%, #2f6bb0 100%);
    color: #fff;
    text-align: center;
    box-shadow: var(--shadow-lg);
}
.about-cta h3 { font-size: 1.5rem; line-height: 2rem; font-weight: 700; margin-bottom: .75rem; }
.about-cta p { color: rgba(255, 255, 255, .82); max-width: 46rem; margin: 0 auto 1.75rem; }
.about-cta .btn { background: #fff; color: var(--brand-navy); box-shadow: var(--shadow-md); }
.about-cta .btn:hover { background: var(--gray-100); color: var(--brand-deep); transform: translateY(-.125rem); }

/* ------------------------------------------------------------------
   12 联系我们
   ------------------------------------------------------------------ */
.contact-grid { display: grid; grid-template-columns: 1fr; gap: 2rem; }
.contact-grid h2 { font-size: 1.25rem; line-height: 1.75rem; font-weight: 700; color: var(--brand-navy); margin-bottom: 1rem; }

.contact-list { display: flex; flex-direction: column; gap: .75rem; margin-bottom: 1.5rem; }
.contact-list li { display: flex; align-items: flex-start; gap: .75rem; }
.contact-list .icon-badge { width: 2.25rem; height: 2.25rem; }
.contact-list .icon-badge svg { width: .875rem; height: .875rem; }
.contact-list .cl { min-width: 80px; font-weight: 600; color: var(--brand-navy); font-size: .875rem; padding-top: .35rem; }
.contact-list .cv { color: var(--gray-600); font-size: .875rem; padding-top: .35rem; word-break: break-all; }
.contact-list a.cv:hover { color: var(--brand-accent); }

.map-frame {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--gray-200);
    background: var(--gray-100);
}
.map-frame iframe,
.map-frame #siteMap { display: block; width: 100%; height: 300px; border: 0; }
.map-fallback[hidden] { display: none; }
.map-fallback {
    height: 300px;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    gap: .5rem; padding: 1.5rem; text-align: center;
    color: var(--gray-500); font-size: .875rem;
}
.map-fallback strong { color: var(--brand-navy); }

/* 表单 */
.form-grid { display: grid; grid-template-columns: 1fr; gap: .75rem; }
.form-field { margin-bottom: .75rem; }
.form-field label { display: block; font-size: .75rem; font-weight: 500; color: var(--gray-700); margin-bottom: .25rem; }
.form-field .req { color: #EF4444; }
.form-control {
    width: 100%;
    padding: .625rem .75rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-lg);
    font-size: .875rem;
    line-height: 1.25rem;
    background: #fff;
    outline: none;
    transition: border-color .2s ease, box-shadow .2s ease;
}
.form-control::placeholder { color: var(--gray-400); }
.form-control:focus { border-color: transparent; box-shadow: 0 0 0 2px var(--brand-accent); }
.form-control[aria-invalid="true"] { border-color: #EF4444; }
textarea.form-control { resize: none; }
.form-actions { margin-top: .25rem; }
.form-note { margin-top: .75rem; text-align: center; font-size: .75rem; color: var(--gray-500); }

/* 提交结果提示 */
.alert {
    display: flex; align-items: flex-start; gap: .5rem;
    padding: .75rem 1rem;
    border-radius: var(--radius-lg);
    font-size: .875rem;
    margin-bottom: 1rem;
}
.alert-success { background: #ECFDF5; color: #065F46; border: 1px solid #A7F3D0; }
.alert-error   { background: #FEF2F2; color: #991B1B; border: 1px solid #FECACA; }

/* ------------------------------------------------------------------
   13 新闻动态
   ------------------------------------------------------------------ */
.news-grid { display: grid; grid-template-columns: 1fr; gap: 2rem; }
.news-card { display: flex; flex-direction: column; }
.news-card .card-media { height: 14rem; }
.news-card .card-media img { object-fit: contain; }
.news-card-body { padding: 1.5rem; display: flex; flex-direction: column; flex: 1 1 auto; }
.news-card-body h2 {
    font-size: 1.25rem;
    line-height: 1.75rem;
    font-weight: 700;
    color: var(--brand);
    margin-bottom: .75rem;
}
.news-card-body .news-summary {
    font-size: .875rem;
    line-height: 1.25rem;
    color: var(--gray-600);
    margin-bottom: 1rem;
}
.news-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .75rem;
    font-size: .75rem;
    color: var(--gray-500);
    margin-bottom: 1rem;
    flex-wrap: wrap;
}
.news-meta > div { display: flex; align-items: center; gap: .25rem; }
.news-meta svg { width: .75rem; height: .75rem; }
.news-card-body .text-link { margin-top: auto; }

/* 新闻列表页：一行三个的精简卡片，整张卡片可点击跳转详情 */
.news-grid--list { display: grid; grid-template-columns: 1fr; gap: 1.25rem; }
.news-card--compact { position: relative; }
.news-card--compact .card-media { height: 9.5rem; }
.news-card--compact .news-card-body { padding: 1rem 1.125rem 1.125rem; }
.news-card--compact .news-card-body h2 {
    font-size: 1.0625rem;
    line-height: 1.5rem;
    margin-bottom: .5rem;
}
.news-card--compact .news-summary {
    font-size: .8125rem;
    line-height: 1.25rem;
    margin-bottom: .75rem;
}
.news-card--compact .news-meta { margin-bottom: .75rem; gap: .5rem .75rem; }
.news-card--compact .news-placeholder { font-size: 1.75rem; }
.news-card--compact:hover .text-link { gap: .75rem; color: var(--brand-accent-h); }
/* 标题链接向外拉伸铺满整张卡片：点卡片任意位置都能进入新闻详情 */
.news-card--compact .news-card-body h2 a { color: inherit; }
.news-card-hit::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 2;
    border-radius: var(--radius-lg);
}
.news-card-hit:focus-visible::after { outline: 2px solid var(--brand-accent); outline-offset: 3px; }
@media (min-width: 640px) {
    .news-grid--list { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.5rem; }
}
@media (min-width: 1024px) {
    .news-grid--list { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.5rem; }
}

/* 无图占位（主色渐变 + 首字） */
.news-placeholder {
    width: 100%; height: 100%;
    display: flex; align-items: center; justify-content: center;
    background: linear-gradient(to bottom right, var(--brand), var(--brand-accent));
    color: #fff;
    font-size: 2.25rem;
    font-weight: 700;
}

/* 新闻详情 */
.news-article { max-width: 100%; }
.news-article-cover {
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: #fff;
    margin-bottom: 2rem;
}
.news-article-cover img {
    width: 100%;
    max-height: 600px;
    object-fit: contain;
    margin-inline: auto;
}
.news-article-head { margin-bottom: 2rem; }
.news-article-head h1 {
    font-size: 1.875rem;
    line-height: 2.25rem;
    font-weight: 700;
    color: var(--brand);
    margin-bottom: 1rem;
}
.news-article-meta {
    display: flex; flex-wrap: wrap; align-items: center;
    gap: 1rem; font-size: .875rem; color: var(--gray-500);
}
.news-article-meta > div { display: flex; align-items: center; gap: .5rem; }
.news-article-meta svg { width: .875rem; height: .875rem; }
.news-article-summary {
    background: var(--gray-50);
    border-left: 4px solid var(--brand-accent);
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
    padding: 1.5rem;
    margin-bottom: 2rem;
}
.news-article-summary p { color: var(--gray-700); font-style: italic; }
.article-content { color: var(--gray-700); font-size: 1.125rem; line-height: 1.75; }
.article-content p { margin-bottom: 1.25rem; }
.article-content img { border-radius: var(--radius-lg); margin-block: 1.5rem; }
.article-content h2, .article-content h3 {
    color: var(--brand-navy); font-weight: 700; margin: 2rem 0 1rem;
}
.article-content h2 { font-size: 1.5rem; line-height: 2rem; }
.article-content h3 { font-size: 1.25rem; line-height: 1.75rem; }
.article-content ul, .article-content ol { margin: 0 0 1.25rem 1.5rem; list-style: disc; }
.article-content ol { list-style: decimal; }
.article-content li { margin-bottom: .5rem; }
.article-content blockquote {
    border-left: 4px solid var(--brand-accent);
    background: var(--gray-50);
    padding: .75rem 1rem;
    margin-bottom: 1.25rem;
    color: var(--gray-700);
}
.article-content table { width: 100%; border-collapse: collapse; margin-bottom: 1.5rem; }
.article-content th, .article-content td { border: 1px solid var(--gray-200); padding: .5rem .75rem; font-size: 1rem; }

/* 未找到 / 空状态 */
.state-empty { padding: 4rem 1rem; text-align: center; }
.state-empty h1 { font-size: 1.875rem; line-height: 2.25rem; font-weight: 700; color: var(--brand); margin-bottom: 1rem; }
.state-empty p { color: var(--gray-600); margin-bottom: 2rem; }

/* 分页 */
.pager { display: flex; flex-wrap: wrap; justify-content: center; gap: .5rem; margin-top: 3rem; }
.pager a, .pager span {
    min-width: 2.5rem;
    padding: .5rem .75rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    text-align: center;
    font-size: .875rem;
    color: var(--gray-700);
    transition: all .2s ease;
}
.pager a:hover { border-color: var(--brand-accent); color: var(--brand-accent); }
.pager .is-current { background: var(--brand); border-color: var(--brand); color: #fff; }

/* ------------------------------------------------------------------
   14 动画
   ------------------------------------------------------------------ */
@keyframes marquee-scroll {
    from { transform: translateX(0); }
    to   { transform: translateX(-50%); }
}

@keyframes spin { to { transform: rotate(360deg); } }

/* 滚动入场（由 site.js 触发） */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; transition-delay: var(--d, 0ms); }
.js .reveal.is-in { opacity: 1; transform: none; }

/* ------------------------------------------------------------------
   15 响应式（断点对齐 Tailwind sm/md/lg/xl）
   ------------------------------------------------------------------ */
@media (min-width: 640px) {
    .container { padding-inline: 1.5rem; }

    .section, .section-lg { padding-block: 3rem; }
    .section-head { margin-bottom: 3rem; }
    .section-head h2 { font-size: 1.875rem; line-height: 2.25rem; }
    .section-head p { font-size: 1.125rem; line-height: 1.75rem; }

    .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.5rem; }
    .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.5rem; }
    .qual-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.5rem; }
    .metric-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.5rem; }
    .app-card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .form-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
    .values-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }

    .hero-slogan { font-size: 2.25rem; }
    .hero-actions { flex-direction: row; gap: 1rem; }
    .hero-stats { margin-top: 3rem; gap: 1.5rem; }
    .hero-stat-value { font-size: 1.875rem; line-height: 2.25rem; }
    .hero-stat-label { font-size: .875rem; line-height: 1.25rem; }

    .card-media { height: 11rem; }
    .card-body { padding: 1.25rem; }
    .card-title { font-size: 1.125rem; line-height: 1.75rem; }
    .card-text { font-size: .875rem; line-height: 1.25rem; }
    .news-card .card-media { height: 12rem; }

    .app-tile { height: 14rem; }
    .app-tile-cover h3 { font-size: 1.125rem; line-height: 1.75rem; }
    .app-tile-cover p { font-size: .875rem; line-height: 1.25rem; }
    .app-tile-label h3 { font-size: 1rem; line-height: 1.5rem; }

    .partner-cell { width: 12rem; padding: .75rem; }
    .partner-logo { height: 5rem; }

    .footer-grid { gap: 2rem; }
    .about-intro { padding: 1.5rem; font-size: 1rem; line-height: 1.8; }
    .about-intro > :not(:first-child) { margin-top: 1.25rem; }
    .about-block > h2 { font-size: 1.5rem; line-height: 2rem; }
    .value-card { padding: 1.5rem; }
    .value-card > p { font-size: 1rem; }
    .contact-grid h2 { font-size: 1.5rem; line-height: 2rem; }
    .contact-list .icon-badge { width: 2.5rem; height: 2.5rem; }
    .contact-list .icon-badge svg { width: 1rem; height: 1rem; }
    .contact-list .cl, .contact-list .cv { font-size: 1rem; }
    .form-field label { font-size: .875rem; }
    .form-control { padding: .75rem 1rem; font-size: 1rem; line-height: 1.5rem; }

    .tech-partner { padding: 2rem; }
    .tech-partner .inner { gap: 1rem; }
    .tech-partner h3 { font-size: 1.25rem; line-height: 1.75rem; }
    .tech-partner p { font-size: 1rem; line-height: 1.5rem; }
    .tech-icon { width: 1.625rem; height: 1.625rem; }
    .tech-row-media img, .tech-row-placeholder { height: 18rem; }
    .tech-row-body { padding: 1.5rem; }
    .tech-row-body h3 { font-size: 1.25rem; line-height: 1.75rem; }
    .tech-row-body p { font-size: 1rem; line-height: 1.625; }

    .product-row-media img { height: 18rem; }
    .factory-cell { width: 20rem; }
    .factory-track { animation-duration: 72s; }
}

@media (min-width: 768px) {
    .section        { padding-block: 4rem; }
    .section-lg     { padding-block: 5rem; }
    .section-tint   { padding-block: 4rem; }

    .section-head h2 { font-size: 2.25rem; line-height: 2.5rem; }
    .page-head h1 { font-size: 2.25rem; line-height: 2.5rem; }

    .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .qual-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.5rem; }
    .app-card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .about-stats { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 2rem; margin-bottom: 3rem; }
    .about-stat {
        display: block;
        padding: 2rem 1.5rem;
        text-align: center;
    }
    .about-stat::after { left: 1.5rem; right: 1.5rem; }
    .about-stat-icon { width: 3.5rem; height: 3.5rem; margin: 0 auto 1rem; }
    .about-stat-icon svg { width: 1.75rem; height: 1.75rem; }
    .about-stat-value { font-size: 1.875rem; line-height: 2.25rem; margin-bottom: .375rem; }
    .about-stat-label { font-size: .9375rem; }
    .about-cta { padding: 3rem 2rem; }
    .contact-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 3rem; }
    .tech-partners { grid-template-columns: repeat(2, minmax(0, 1fr)); }

    .footer-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }

    .hero-slogan { font-size: 3rem; line-height: 1.1; }
    .hero-stat-value { font-size: 2.25rem; line-height: 2.5rem; }
    .hero-stats { gap: 2rem; }

    /* 发展历程：切换到横向时间轴 */
    .timeline-mobile { display: none; }
    .timeline-desktop {
        display: flex;
        justify-content: space-between;
        align-items: center;
        position: relative;
        padding: 4rem 2rem;
    }
    .timeline-desktop::before {
        content: "";
        position: absolute;
        left: 0; right: 0; top: 50%;
        height: 2px;
        background: linear-gradient(to right, rgba(59,130,246,.2), var(--brand-accent), rgba(59,130,246,.2));
    }
    .tl-node { display: flex; flex-direction: column; align-items: center; flex: 1 1 0; position: relative; }
    .tl-card {
        background: #fff;
        border-radius: var(--radius-lg);
        padding: 1rem;
        box-shadow: var(--shadow-md);
        max-width: 220px;
        text-align: center;
        color: var(--gray-700);
        font-size: .875rem;
        line-height: 1.625;
        transition: box-shadow .3s ease, transform .3s ease;
    }
    .tl-node:hover .tl-card { box-shadow: var(--shadow-lg); transform: scale(1.05); }
    .tl-year {
        color: var(--brand-accent);
        font-weight: 700;
        font-size: 1.125rem;
        line-height: 1.75rem;
        background: #fff;
        padding: .375rem 1rem;
        border-radius: 9999px;
        box-shadow: var(--shadow-sm);
        transition: box-shadow .2s ease;
    }
    .tl-node:hover .tl-year { box-shadow: var(--shadow-md); }
    .tl-dot {
        width: 1rem; height: 1rem;
        border-radius: 9999px;
        background: var(--brand-accent);
        border: 4px solid #fff;
        box-shadow: var(--shadow-lg);
        position: relative;
        z-index: 1;
        transition: transform .2s ease;
    }
    .tl-node:hover .tl-dot { transform: scale(1.1); }
    .tl-line { position: absolute; left: 50%; transform: translateX(-50%); width: 2px; height: 2.5rem; }

    .tl-node--top .tl-card   { margin-bottom: 2.5rem; }
    .tl-node--top .tl-line   { bottom: 2.5rem; background: linear-gradient(to bottom, rgba(59,130,246,.4), var(--brand-accent)); }
    .tl-node--top .tl-year   { margin-top: 2.5rem; }
    .tl-node--bottom .tl-year { margin-bottom: 2.5rem; }
    .tl-node--bottom .tl-line { top: 2.5rem; background: linear-gradient(to bottom, var(--brand-accent), rgba(59,130,246,.4)); }
    .tl-node--bottom .tl-card { margin-top: 2.5rem; }
}

@media (min-width: 1024px) {
    .container { padding-inline: 2rem; }

    .nav { display: flex; }
    .header-actions { display: flex; }
    .nav-toggle { display: none; }
    .mobile-menu { display: none !important; }

    /* 页眉 Logo：桌面端与导航 / 语言按钮同排，按剩余宽度等比缩小 */
    .logo img { max-width: min(17.5rem, 22vw); max-height: 3.5rem; }

    .grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 2rem; }
    .grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 2rem; }
    .qual-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 2rem; }
    .metric-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1.5rem; }
    .app-card-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }

    .qual-card { padding: 1.5rem; }
    .qual-card h3 { font-size: 1.25rem; line-height: 1.75rem; }
    .qual-value { font-size: 1.5rem; line-height: 2rem; }
    .qual-card .icon-badge { width: 4rem; height: 4rem; }
    .qual-card .icon-badge svg { width: 1.875rem; height: 1.875rem; }

    .card-media { height: 16rem; }
    .card-body { padding: 1.5rem; }
    .card-title { font-size: 1.25rem; line-height: 1.75rem; margin-bottom: .75rem; }
    .card-text { font-size: .875rem; }

    .app-tile { height: 16rem; }
    .app-tile-cover h3 { font-size: 1.25rem; line-height: 1.75rem; }
    .app-tile-cover p { font-size: .875rem; }
    .app-tile-label h3 { font-size: 1.125rem; line-height: 1.75rem; }

    .partner-cell { width: 15rem; }
    .partner-logo { height: 6rem; }

    .hero-slogan { font-size: 3.75rem; }
    .hero-stat-value { font-size: 2.25rem; }

    .product-row { flex-direction: row; }
    .product-row.is-reverse { flex-direction: row-reverse; }
    .product-row-media img { height: 20rem; }

    .tech-row { flex-direction: row; }
    .tech-row.is-reverse { flex-direction: row-reverse; }
    .tech-row-media img, .tech-row-placeholder { height: 20rem; }
    .tech-row-body { padding: 2rem; }

    .footer-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }

    .timeline-desktop { padding: 4rem 2rem; }
}

@media (min-width: 1280px) {
    .nav { gap: 2rem; }
    .header-actions { gap: 1rem; }
    .lang-btn { font-size: .875rem; line-height: 1.25rem; }
    .btn-consult { padding: .5rem 1.25rem; font-size: .875rem; line-height: 1.25rem; }
    .hero-slogan { font-size: 4.5rem; }
}

/* ------------------------------------------------------------------
   16 打印与无障碍
   ------------------------------------------------------------------ */
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
        animation-duration: .001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .001ms !important;
    }
    .js .reveal { opacity: 1; transform: none; }
}

.visually-hidden {
    position: absolute; width: 1px; height: 1px;
    padding: 0; margin: -1px; overflow: hidden;
    clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

:focus-visible { outline: 2px solid var(--brand-accent); outline-offset: 2px; }

@media print {
    .site-header, .site-footer, .nav-toggle, .hero-arrow, .hero-dots { display: none !important; }
    .hero { height: auto; min-height: 0; color: #000; }
    .article-content { font-size: 12pt; }
}