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

:root {
    --primary: #111;
    --primary-light: #444;
    --accent: #111;
    --text: #111;
    --text-light: #555;
    --text-lighter: #999;
    --bg: #fff;
    --bg-light: #f7f7f7;
    --bg-dark: #0a0a0a;
    --border: #eaeaea;
    --border-dark: #111;
    --shadow: 0 1px 0 rgba(0,0,0,0.04);
    --shadow-lg: 0 6px 30px rgba(0,0,0,0.08);
    --radius: 0;
    --radius-lg: 0;
    --radius-xl: 0;
    --transition: 0.25s ease;
    --content-width: 86%;
    --max-width: 1400px;
}

/* ============ 首页全屏区块滚动 ============ */
html {
    scroll-behavior: smooth;
    font-size: 16px;
    overflow-x: hidden;
}

body.home-page {
    overflow-y: auto;
}

@media (min-width: 1025px) {
    body.home-page {
        scroll-snap-type: y proximity;
        overflow-y: scroll;
        height: 100vh;
    }

    body.home-page .fp-section {
        scroll-snap-align: start;
        scroll-snap-stop: normal;
        min-height: 100vh;
        display: flex;
        flex-direction: column;
        justify-content: center;
        box-sizing: border-box;
    }

    body.home-page .section-banner {
        height: 100vh;
    }

    body.home-page .section-intro {
        height: 100vh;
        padding: 0;
        min-height: auto;
    }

    body.home-page .section-solutions,
    body.home-page .section-technology,
    body.home-page .section-brands,
    body.home-page .section-news {
        padding-top: 90px;
        padding-bottom: 90px;
    }
}

/* 全屏滚动导航点 */
.fp-nav {
    position: fixed;
    right: 28px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.fp-nav-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(0,0,0,0.15);
    cursor: pointer;
    transition: background 0.3s ease, transform 0.3s ease;
    border: none;
    padding: 0;
}

.fp-nav-dot:hover {
    background: rgba(0,0,0,0.4);
}

.fp-nav-dot.active {
    background: var(--primary);
    transform: scale(1.3);
}

body.home-page .fp-nav-dot {
    background: rgba(255,255,255,0.35);
}

body.home-page .fp-nav-dot:hover {
    background: rgba(255,255,255,0.7);
}

body.home-page .fp-nav-dot.active {
    background: #fff;
}

body.home-page.scrolled .fp-nav-dot {
    background: rgba(0,0,0,0.15);
}

body.home-page.scrolled .fp-nav-dot:hover {
    background: rgba(0,0,0,0.4);
}

body.home-page.scrolled .fp-nav-dot.active {
    background: var(--primary);
}

@media (max-width: 1024px) {
    .fp-nav {
        display: none;
    }
}

a, button, input, select, textarea, img {
    transition: color var(--transition), background-color var(--transition), border-color var(--transition), opacity var(--transition);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.65;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

img {
    max-width: 100%;
    height: auto;
}

.container {
    width: var(--content-width);
    max-width: var(--max-width);
    margin: 0 auto;
    box-sizing: border-box;
}

/* ============ 按钮 ============ */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    border: 1px solid var(--border-dark);
    text-align: center;
    letter-spacing: 1px;
    background: transparent;
    color: var(--text);
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.btn-primary:hover {
    background: #000;
    border-color: #000;
    color: #fff;
}

.btn-outline {
    background: transparent;
    color: var(--text);
    border-color: var(--border-dark);
}

.btn-outline:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.btn-lg {
    padding: 16px 44px;
    font-size: 1rem;
}

/* ============ 通用 ============ */
.no-data {
    text-align: center;
    padding: 80px 20px;
    color: var(--text-lighter);
    font-size: 1rem;
    letter-spacing: 1px;
}

/* ============ 头部导航 ============ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(0,0,0,0.25);
    transition: background 0.3s ease, box-shadow 0.3s ease;
}

.header.home-header {
    background: rgba(255,255,255,0);
}

.header.scrolled {
    background: #fff;
    box-shadow: 0 1px 0 rgba(0,0,0,0.08);
}

.header-inner {
    width: var(--content-width);
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    align-items: center;
    height: 76px;
    position: relative;
}

.logo {
    flex-shrink: 0;
}

.logo a {
    font-size: 1.4rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: 4px;
    display: flex;
    align-items: center;
    transition: color 0.3s ease;
}

.header.scrolled .logo a {
    color: var(--primary);
}

.logo-img {
    height: 28px;
    width: auto;
    display: block;
}

/* 默认显示白色logo，隐藏黑色logo（深色背景场景） */
.logo-img-white { display: block; }
.logo-img-black { display: none; }

/* 滚动后白底黑字：切换为黑色logo */
.header.scrolled .logo-img-white {
    display: none;
}
.header.scrolled .logo-img-black {
    display: block;
}

.nav {
    display: flex;
    align-items: center;
    gap: 0;
    flex: 1;
    justify-content: center;
}

.nav > a,
.nav-dropdown > a {
    color: #fff;
    padding: 10px 24px;
    font-size: 1.1rem;
    white-space: nowrap;
    position: relative;
    font-weight: 400;
    letter-spacing: 3px;
}

.nav > a::after,
.nav-dropdown > a::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 1.5px;
    background: currentColor;
    transition: width 0.25s ease;
}

.nav > a:hover::after,
.nav > a.active::after,
.nav-dropdown > a:hover::after,
.nav-dropdown > a.active::after {
    width: 60%;
}

.header.scrolled .nav > a,
.header.scrolled .nav-dropdown > a {
    color: var(--text);
}

.nav > a:hover,
.nav-dropdown > a:hover {
    opacity: 0.75;
}

.header.scrolled .nav > a:hover,
.header.scrolled .nav-dropdown > a:hover {
    opacity: 1;
    color: var(--primary);
}

.nav > a.active,
.nav-dropdown > a.active {
    color: #fff;
    opacity: 0.75;
}

.header.scrolled .nav > a.active,
.header.scrolled .nav-dropdown > a.active {
    color: var(--primary);
    font-weight: 500;
    opacity: 1;
}

.nav-dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 4px);
    left: 50%;
    transform: translateX(-50%);
    min-width: 160px;
    background: #fff;
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, visibility 0.2s ease;
    z-index: 100;
    border: 1px solid var(--border);
}

.nav-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
}

.dropdown-menu a {
    display: block;
    padding: 10px 22px;
    color: var(--text);
    font-size: 0.85rem;
    text-align: center;
    transition: background 0.15s ease, color 0.15s ease;
}

.dropdown-menu a:hover {
    background: var(--bg-light);
    color: var(--primary);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: #fff;
    transition: transform 0.25s ease, opacity 0.25s ease, background 0.3s ease;
}

.header.scrolled .nav-toggle span {
    background: var(--primary);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ============ 首屏 Banner ============ */
.section {
    position: relative;
    width: 100%;
}

.section-banner {
    position: relative;
    padding: 0;
    height: 100vh;
    min-height: 560px;
    overflow: hidden;
    background: #000;
}

.banner-slider {
    position: relative;
    width: 100%;
    height: 100%;
}

.banner-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.6s ease;
    display: flex;
    flex-direction: column;
}

.banner-slide.active {
    opacity: 1;
}

.banner-img-wrap {
    position: absolute;
    inset: 0;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #111;
}

.banner-img-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 黑色半透明遮罩，避免高光影响导航栏可读性 */
.banner-img-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, rgba(0,0,0,0.35) 0%, rgba(0,0,0,0.15) 30%, rgba(0,0,0,0.15) 70%, rgba(0,0,0,0.35) 100%);
    z-index: 1;
    pointer-events: none;
}

.banner-text-bar {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 2;
    background: rgba(0,0,0,0.75);
    padding: 28px 7% 50px;
}

.banner-text-inner {
    max-width: 70%;
}

.banner-text-title {
    font-size: 1.8rem;
    color: #fff;
    font-weight: 600;
    letter-spacing: 4px;
    line-height: 1.4;
    margin: 0 0 10px 0;
}

.banner-text-desc {
    font-size: 0.92rem;
    color: rgba(255,255,255,0.75);
    line-height: 1.8;
    letter-spacing: 1px;
    margin: 0;
}

/* 左右切换箭头 */
.banner-arrow {
    position: absolute;
    top: 45%;
    transform: translateY(-50%);
    z-index: 10;
    background: rgba(0,0,0,0.35);
    border: none;
    color: #fff;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.3s ease, background 0.3s ease;
}

.section-banner:hover .banner-arrow {
    opacity: 1;
}

.banner-arrow:hover {
    background: rgba(0,0,0,0.7);
}

.banner-prev {
    left: 20px;
}

.banner-next {
    right: 20px;
}

/* 圆形指示器（绝对定位在底部文字栏内、描述下方居中） */
.banner-dots {
    position: absolute;
    bottom: 16px;
    left: 0;
    right: 0;
    display: flex;
    justify-content: center;
    gap: 12px;
    z-index: 10;
}

.banner-dots .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255,255,255,0.4);
    cursor: pointer;
    transition: background var(--transition), transform var(--transition);
    border: none;
    padding: 0;
}

.banner-dots .dot:hover {
    background: rgba(255,255,255,0.7);
}

.banner-dots .dot.active {
    background: #fff;
    transform: scale(1.2);
}

/* ============ 品牌简述 ============ */
/* ============ 通用：英文小标 + 中文大标 ============ */
.section-en {
    font-size: 0.78rem;
    color: var(--text-lighter);
    letter-spacing: 4px;
    margin-bottom: 14px;
    font-family: 'Georgia', 'Times New Roman', serif;
    text-transform: uppercase;
}

.section-title {
    font-size: 2.2rem;
    font-weight: 500;
    color: var(--primary);
    letter-spacing: 6px;
    margin-bottom: 18px;
}

.section-sub {
    font-size: 0.85rem;
    color: var(--text-lighter);
    letter-spacing: 4px;
    margin-bottom: 32px;
    font-family: 'Georgia', 'Times New Roman', serif;
}

/* ============ 关于我们（首页白色背景） ============ */
.section-intro {
    padding: 0;
    overflow: hidden;
    background: #fff;
}

.intro-white {
    position: relative;
    width: 100%;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.intro-white-content {
    width: var(--content-width);
    max-width: var(--max-width);
    text-align: center;
    padding: 80px 32px;
}

.intro-white-desc {
    margin-bottom: 48px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.intro-white-desc p {
    font-size: 1.05rem;
    line-height: 2.1;
    color: var(--text-light);
    letter-spacing: 1px;
}

.intro-white-stats {
    display: flex;
    justify-content: center;
    gap: 0;
    margin-bottom: 48px;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.intro-white-stats .intro-stat-item {
    flex: 1;
    padding: 28px 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    position: relative;
}

.intro-white-stats .intro-stat-item:not(:last-child)::after {
    content: '';
    position: absolute;
    right: 0;
    top: 25%;
    height: 50%;
    width: 1px;
    background: var(--border);
}

.intro-white-stats .intro-stat-num {
    font-size: 2.6rem;
    font-weight: 500;
    letter-spacing: 1px;
    font-family: 'Georgia', 'Times New Roman', serif;
    line-height: 1;
    color: var(--primary);
}

.intro-white-stats .intro-stat-label {
    font-size: 0.85rem;
    color: var(--text-lighter);
    letter-spacing: 2px;
}

.intro-white-more {
    display: flex;
    justify-content: center;
}

.intro-more-btn-white {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 200px;
    height: 52px;
    border: 1px solid var(--border-dark);
    border-radius: 26px;
    color: var(--primary);
    font-size: 0.92rem;
    letter-spacing: 2px;
    text-decoration: none;
    transition: all 0.4s ease;
    position: relative;
}

.intro-more-btn-white:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.intro-more-btn-white::after {
    content: '→';
    margin-left: 8px;
    transition: transform 0.4s ease;
}

.intro-more-btn-white:hover::after {
    transform: translateX(6px);
}

/* ============ 关于我们全屏页面 ============ */

/* ---- 第 1 屏：全屏大图 + 口号（纯视觉） ---- */
.about-hero-banner {
    position: relative;
    width: 100%;
    height: 100vh;
    overflow: hidden;
}

.about-hero-banner-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.about-hero-banner-shade {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
}

.about-hero-banner-content {
    position: relative;
    z-index: 2;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #fff;
}

.about-hero-banner-en {
    font-size: 0.82rem;
    letter-spacing: 8px;
    opacity: 0.5;
    font-family: 'Georgia', 'Times New Roman', serif;
    text-transform: uppercase;
    margin-bottom: 20px;
}

.about-hero-banner-content h1 {
    font-size: 3.2rem;
    font-weight: 400;
    letter-spacing: 8px;
    line-height: 1.3;
    margin-bottom: 16px;
}

.about-hero-banner-sub {
    font-size: 1rem;
    letter-spacing: 6px;
    opacity: 0.7;
}

/* ---- 第 2 屏：公司简介（colibri 左图右文风格） ---- */
.about-section-intro {
    padding-top: 100px;
    padding-bottom: 120px;
}

.about-intro-body {
    display: flex;
    gap: 56px;
    align-items: flex-start;
    max-width: 100%;
    margin-top: 16px;
}

.about-intro-left {
    flex: 0 0 45%;
    min-width: 0;
}

.about-intro-img {
    width: 100%;
    aspect-ratio: 4/3;
    background-size: cover;
    background-position: center;
    border-radius: 16px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.08);
}

/* 右侧文字下方的数据指标（一行 4 列，分隔线风格） */
.about-intro-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    margin-top: 40px;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.about-intro-stat {
    text-align: center;
    padding: 28px 12px;
    position: relative;
}

.about-intro-stat:not(:last-child)::after {
    content: '';
    position: absolute;
    right: 0;
    top: 20%;
    height: 60%;
    width: 1px;
    background: var(--border);
}

.about-intro-stat-num {
    display: block;
    font-size: 2.4rem;
    font-weight: 500;
    color: var(--primary);
    font-family: 'Georgia', 'Times New Roman', serif;
    letter-spacing: 1px;
    line-height: 1.1;
    margin-bottom: 8px;
}

.about-intro-stat-label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-light);
    letter-spacing: 2px;
}

.about-intro-right {
    flex: 0 0 55%;
    min-width: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-top: 8px;
}

.about-intro-right p {
    font-size: 1.08rem;
    color: #4a4a4a;
    line-height: 2;
    text-align: justify;
    margin-bottom: 24px;
}

.about-intro-right p:last-child {
    margin-bottom: 0;
}

.about-fp-section {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    scroll-snap-align: start;
}

.about-fp-section:first-child {
    padding: 0;
    height: 100vh;
}

.about-fp-inner {
    padding: 110px 0 90px;
    max-width: var(--max-width);
    width: var(--content-width);
    margin: 0 auto;
}

/* 公司简介 Hero 扩展 */
.about-hero-detail {
    margin-bottom: 40px;
}

.about-hero-detail p {
    font-size: 0.95rem;
    line-height: 2;
    opacity: 0.85;
    max-width: 700px;
    margin: 0 auto 16px;
    text-align: center;
}

/* 文章内容区 */
.about-articles { margin-top: 32px; }

.about-article-item { margin-bottom: 40px; }

.about-article-item h3 {
    font-size: 1.3rem;
    font-weight: 500;
    color: var(--primary);
    margin-bottom: 16px;
    letter-spacing: 2px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}

.about-article-body {
    font-size: 0.95rem;
    color: var(--text);
    line-height: 1.95;
    text-align: justify;
}

.about-article-body p { margin-bottom: 16px; }

/* ---- 企业文化（全屏背景 + 手风琴卡片） ---- */
.about-section-culture {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    overflow: hidden;
}

.culture-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
}

.culture-bg-shade {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
}

.culture-inner {
    position: relative;
    z-index: 2;
    max-width: var(--max-width);
    width: var(--content-width);
    margin: 0 auto;
    padding: 80px 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 100vh;
}

.culture-title {
    text-align: center;
    font-size: 2.2rem;
    font-weight: 600;
    color: #fff;
    letter-spacing: 6px;
    margin-bottom: 56px;
}

/* 手风琴卡片 */
.culture-accordion {
    display: flex;
    height: 420px;
    gap: 1px;
}

.culture-acc-item {
    flex: 1;
    background: rgba(0, 0, 0, 0.35);
    backdrop-filter: blur(4px);
    padding: 48px 32px;
    cursor: pointer;
    transition: flex 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
}

.culture-acc-item:hover {
    background: rgba(0, 0, 0, 0.45);
}

.culture-acc-item.active {
    flex: 3.5;
    background: rgba(0, 0, 0, 0.5);
}

/* 展开状态的内容 */
.culture-acc-content {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.4s ease 0.15s;
    pointer-events: none;
    position: absolute;
    bottom: 48px;
    left: 32px;
    right: 32px;
}

.culture-acc-item.active .culture-acc-content {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.culture-acc-content h3 {
    font-size: 1.7rem;
    font-weight: 600;
    color: #fff;
    letter-spacing: 2px;
    margin-bottom: 18px;
}

.culture-acc-content p {
    font-size: 1.05rem;
    color: rgba(255,255,255,0.8);
    line-height: 1.9;
}

/* 收缩状态的标题 */
.culture-acc-collapsed {
    display: flex;
    align-items: flex-end;
    justify-content: center;
    height: 100%;
    transition: opacity 0.3s ease;
}

.culture-acc-item.active .culture-acc-collapsed {
    opacity: 0;
    pointer-events: none;
}

.culture-acc-collapsed span {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    font-size: 1.25rem;
    font-weight: 500;
    color: rgba(255,255,255,0.85);
    letter-spacing: 4px;
    white-space: nowrap;
}

/* ---- 发展历程（全屏黑色背景 + 斜线时间轴 + 交互） ---- */
.about-section-history {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    overflow: hidden;
    background: #fff;
}

.history-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
}

.history-bg-shade {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
}

.history-bg-watermark {
    position: absolute;
    top: 8%;
    left: 50%;
    transform: translateX(-50%);
    font-size: clamp(5rem, 12vw, 14rem);
    font-weight: 700;
    color: rgba(255,255,255,0.07);
    letter-spacing: 0.2em;
    z-index: 1;
    pointer-events: none;
    white-space: nowrap;
    font-family: 'Georgia', 'Times New Roman', serif;
    text-transform: uppercase;
}

.history-inner {
    position: relative;
    z-index: 2;
    max-width: var(--max-width);
    width: var(--content-width);
    margin: 0 auto;
    padding: 80px 0 60px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 100vh;
}

/* 标题 */
.history-header {
    text-align: center;
    margin-bottom: 40px;
    color: var(--text);
}

.history-title {
    font-size: 2.2rem;
    font-weight: 600;
    letter-spacing: 6px;
    margin-bottom: 8px;
}

.history-subtitle {
    font-size: 0.85rem;
    opacity: 0.4;
    letter-spacing: 6px;
    text-transform: uppercase;
}

/* 中间内容展示区 */
.history-content {
    text-align: center;
    color: var(--text);
    min-height: 200px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 0;
    opacity: 1;
    transition: opacity 0.4s ease;
}

.history-content.fade {
    opacity: 0;
}

.history-content-year {
    font-size: clamp(5rem, 10vw, 9rem);
    font-weight: 700;
    color: rgba(0,0,0,0.05);
    letter-spacing: 0.15em;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
    z-index: 0;
    font-family: 'Georgia', 'Times New Roman', serif;
}

.history-content-title {
    font-size: 1.6rem;
    font-weight: 500;
    letter-spacing: 3px;
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

.history-content-desc {
    font-size: 0.95rem;
    line-height: 2;
    color: var(--text-light);
    max-width: 600px;
    position: relative;
    z-index: 1;
}

/* 斜线时间轴（陡峭斜线 + 节点贴合线） */
.history-timeline {
    position: relative;
    margin-top: 30px;
    height: 160px;
}

.history-line-svg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.history-dots {
    position: absolute;
    inset: 0;
    z-index: 1;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 0 2%;
}

.history-dot {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    position: relative;
    transition: transform 0.3s ease;
}

/* 节点沿斜线分布：从左下到右上 */
.history-dot:nth-child(1) { padding-top: 130px; }
.history-dot:nth-child(2) { padding-top: 108px; }
.history-dot:nth-child(3) { padding-top: 86px; }
.history-dot:nth-child(4) { padding-top: 64px; }
.history-dot:nth-child(5) { padding-top: 42px; }
.history-dot:nth-child(6) { padding-top: 20px; }

.history-dot:hover {
    transform: translateY(-6px);
}

.dot-marker {
    width: 14px;
    height: 14px;
    background: #e8943a;
    transform: rotate(45deg);
    transition: all 0.3s ease;
    box-shadow: 0 0 0 3px rgba(232, 148, 58, 0.25);
    flex-shrink: 0;
}

.history-dot.active .dot-marker {
    background: #4a90d9;
    box-shadow: 0 0 0 4px rgba(74, 144, 217, 0.35), 0 0 16px rgba(74, 144, 217, 0.3);
    transform: rotate(45deg) scale(1.3);
}

.dot-year {
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--text-light);
    letter-spacing: 2px;
    transition: all 0.3s ease;
    margin-bottom: 8px;
}

.history-dot.active .dot-year {
    color: var(--primary);
}

/* ---- 荣誉资质（深蓝背景全屏） ---- */
.about-section-honor {
    background: #0a1e3d;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* ---- 联系方式（深色背景全屏） ---- */
.about-section-contact {
    background: #0d1117;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.contact-inner {
    max-width: var(--max-width);
    width: var(--content-width);
    margin: 0 auto;
    padding: 110px 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    margin-top: 56px;
}

.contact-card {
    text-align: center;
    padding: 48px 20px 40px;
    border: 1px solid rgba(255,255,255,0.1);
    transition: all 0.4s ease;
}

.contact-card:hover {
    border-color: rgba(255,255,255,0.3);
    background: rgba(255,255,255,0.03);
}

.contact-card-icon {
    display: block;
    width: 36px;
    height: 36px;
    margin: 0 auto 20px;
    filter: brightness(0) invert(1);
    opacity: 0.8;
}

.contact-card-label {
    display: block;
    font-size: 0.78rem;
    color: rgba(255,255,255,0.4);
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 12px;
}

.contact-card-value {
    display: block;
    font-size: 1.1rem;
    color: #fff;
    font-weight: 400;
    letter-spacing: 1px;
    line-height: 1.6;
}

.about-empty-text {
    color: var(--text-lighter);
    text-align: center;
    font-size: 0.95rem;
    padding: 40px 0;
}

/* ============ 联系我们页面 ============ */
.contact-page-section {
    padding: 20px 0 80px;
}

.contact-page-desc {
    text-align: center;
    font-size: 1.05rem;
    color: var(--text-light);
    line-height: 1.85;
    max-width: 700px;
    margin: 0 auto 56px;
}

.contact-page-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 32px;
}

.contact-page-card {
    text-align: center;
    padding: 48px 20px 40px;
    border: 1px solid var(--border);
    transition: all 0.4s ease;
    background: var(--bg);
}

.contact-page-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.contact-page-icon {
    display: block;
    width: 40px;
    height: 40px;
    margin: 0 auto 20px;
    opacity: 0.7;
}

.contact-page-label {
    display: block;
    font-size: 0.78rem;
    color: var(--text-lighter);
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 12px;
}

.contact-page-value {
    display: block;
    font-size: 1.05rem;
    color: var(--text);
    font-weight: 400;
    letter-spacing: 1px;
    line-height: 1.6;
    word-break: break-word;
    overflow-wrap: break-word;
}

/* 关于我们页面导航点定位 */
.fp-nav-about {
    top: 50%;
    right: 28px;
}

/* ============ 服务与支持页面 ============ */
.support-intro-desc {
    text-align: center;
    font-size: 1.05rem;
    color: var(--text-light);
    line-height: 1.85;
    max-width: 700px;
    margin: 0 auto 56px;
}

.support-section {
    margin-bottom: 72px;
}

.support-section-header {
    text-align: center;
    margin-bottom: 40px;
}

.support-section-title {
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: 3px;
    color: var(--text);
    margin-bottom: 6px;
}

.support-section-en {
    font-size: 0.75rem;
    color: var(--text-lighter);
    letter-spacing: 4px;
    text-transform: uppercase;
}

.support-grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 28px;
}

.support-grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.support-card {
    text-align: center;
    padding: 44px 24px 36px;
    border: 1px solid var(--border);
    background: var(--bg);
    transition: all 0.35s ease;
}

.support-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

.support-card-icon {
    color: var(--primary);
    margin-bottom: 20px;
    display: flex;
    justify-content: center;
}

.support-card h4 {
    font-size: 1.05rem;
    font-weight: 600;
    letter-spacing: 2px;
    margin-bottom: 12px;
    color: var(--text);
}

.support-card p {
    font-size: 0.88rem;
    color: var(--text-light);
    line-height: 1.75;
}

.support-item {
    padding: 36px 28px;
    border: 1px solid var(--border);
    background: var(--bg);
}

.support-item h4 {
    font-size: 1.05rem;
    font-weight: 600;
    letter-spacing: 2px;
    margin-bottom: 20px;
    color: var(--text);
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border);
}

.support-item-body p {
    font-size: 0.88rem;
    color: var(--text-light);
    line-height: 1.9;
    padding: 5px 0;
    padding-left: 14px;
    position: relative;
}

.support-item-body p::before {
    content: '';
    position: absolute;
    left: 0;
    top: 13px;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--primary);
}

/* FAQ */
.support-faq-list {
    max-width: 820px;
    margin: 0 auto;
}

.support-faq-item {
    border-bottom: 1px solid var(--border);
    padding: 24px 0;
}

.support-faq-q {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    letter-spacing: 1px;
    margin-bottom: 10px;
}

.support-faq-a {
    font-size: 0.92rem;
    color: var(--text-light);
    line-height: 1.85;
    padding-left: 8px;
}

/* ============ Download List ============ */
.download-list {
    max-width: 900px;
    margin: 0 auto;
}

.download-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 20px 24px;
    border: 1px solid var(--border);
    background: var(--bg);
    margin-bottom: 12px;
    transition: all 0.3s ease;
}

.download-item:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-sm);
}

.download-item-info {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    flex: 1;
    min-width: 0;
}

.download-item-icon {
    color: var(--primary);
    flex-shrink: 0;
    margin-top: 2px;
}

.download-item-meta {
    min-width: 0;
}

.download-item-meta h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    letter-spacing: 1px;
    margin-bottom: 4px;
}

.download-item-meta p {
    font-size: 0.85rem;
    color: var(--text-light);
    line-height: 1.6;
}

.download-item-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    background: var(--primary);
    color: #fff;
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 1px;
    text-decoration: none;
    border-radius: 4px;
    white-space: nowrap;
    flex-shrink: 0;
    border: 2px solid var(--primary);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.download-item-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: #fff;
    transition: left 0.3s ease;
    z-index: 0;
}

.download-item-btn:hover::before {
    left: 0;
}

.download-item-btn:hover {
    color: #000;
    border-color: #000;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0,0,0,0.18);
}

.download-item-btn span,
.download-item-btn svg {
    position: relative;
    z-index: 2;
    transition: transform 0.3s ease;
}

.download-item-btn:hover svg {
    transform: translateY(2px);
}

@media (max-width: 768px) {
    .download-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
        padding: 16px;
    }
    .download-item-btn {
        align-self: stretch;
        justify-content: center;
    }
}

@media (max-width: 1024px) {
    .support-grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
    .support-grid-3 {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .support-grid-4 {
        grid-template-columns: 1fr;
    }
    .support-section {
        margin-bottom: 48px;
    }
    .support-section-title {
        font-size: 1.25rem;
    }
    .support-card {
        padding: 32px 20px 28px;
    }
    .support-item {
        padding: 24px 20px;
    }
}

/* fp-page 全屏滚动 */
@media (min-width: 1025px) {
    body.fp-page {
        scroll-snap-type: y proximity;
        overflow-y: scroll;
        height: 100vh;
    }

    body.fp-page .about-fp-section {
        scroll-snap-align: start;
        scroll-snap-stop: normal;
    }
}

@media (max-width: 1024px) {
    .about-hero-banner-bg {
        background-attachment: scroll;
    }

    .about-hero-banner-content h1 {
        font-size: 2.4rem;
        letter-spacing: 4px;
    }

    .about-intro-body {
        flex-direction: column;
        gap: 36px;
    }

    .about-intro-left,
    .about-intro-right {
        flex: 1 1 100%;
    }

    .about-intro-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .culture-accordion {
        height: 360px;
    }

    .history-title {
        font-size: 1.8rem;
        letter-spacing: 4px;
    }

    .history-content-title {
        font-size: 1.3rem;
    }

    .history-timeline {
        height: 130px;
    }

    .history-dot:nth-child(1) { padding-top: 105px; }
    .history-dot:nth-child(2) { padding-top: 88px; }
    .history-dot:nth-child(3) { padding-top: 71px; }
    .history-dot:nth-child(4) { padding-top: 54px; }
    .history-dot:nth-child(5) { padding-top: 37px; }
    .history-dot:nth-child(6) { padding-top: 20px; }

    .contact-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .about-fp-inner {
        padding: 80px 20px 60px;
    }

    .about-hero-banner-content h1 {
        font-size: 1.8rem;
        letter-spacing: 3px;
    }

    .about-hero-banner-sub {
        font-size: 0.85rem;
        letter-spacing: 3px;
    }

    .about-section-intro {
        padding-top: 80px;
        padding-bottom: 80px;
    }

    .culture-accordion {
        flex-direction: column;
        height: auto;
    }

    .culture-acc-item {
        min-height: 80px;
        padding: 24px 20px;
    }

    .culture-acc-item.active {
        min-height: 200px;
    }

    .culture-acc-collapsed span {
        writing-mode: horizontal-tb;
    }

    .culture-title {
        font-size: 1.6rem;
    }

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

    .contact-inner {
        padding: 80px 20px 60px;
    }

    .contact-page-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 20px;
    }

    .contact-page-card {
        padding: 32px 16px 28px;
    }

}

/* 统计条（如其他页面需要可保留） */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    margin-bottom: 48px;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.stat-item {
    padding: 36px 16px;
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.stat-item:last-child {
    border-right: none;
}

.stat-num {
    font-size: 2.4rem;
    font-weight: 500;
    color: var(--primary);
    letter-spacing: 1px;
    font-family: 'Georgia', 'Times New Roman', serif;
    line-height: 1;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-light);
    letter-spacing: 2px;
}

/* ============ 区块标题（统一水印风格） ============ */
.section-title-wrap {
    position: relative;
    text-align: center;
    margin-bottom: 48px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.section-bg-en {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-family: 'Georgia', 'Times New Roman', serif;
    font-size: 5.5rem;
    font-weight: 700;
    color: #f1f1f1;
    letter-spacing: 10px;
    line-height: 1;
    user-select: none;
    white-space: nowrap;
    z-index: 0;
}

.section-title-inner {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.section-title-inner .section-en {
    font-size: 0.78rem;
    color: var(--text-lighter);
    letter-spacing: 4px;
    margin-bottom: 0;
}

.section-title-inner .section-title {
    font-size: 2rem;
    font-weight: 500;
    color: var(--primary);
    letter-spacing: 6px;
    margin-bottom: 0;
}

/* 带"更多"链接的标题区 */
.section-title-wrap .more-link {
    position: absolute;
    right: 0;
    bottom: 8px;
    color: var(--text-light);
    font-size: 0.88rem;
    letter-spacing: 1px;
    transition: color var(--transition);
    z-index: 2;
}
.section-title-wrap .more-link:hover {
    color: var(--primary);
}

/* 旧版 header 兼容（内页等仍可用） */
.section-header {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: end;
    gap: 24px;
    margin-bottom: 48px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
    width: 100%;
}
.section-header > p.section-en {
    grid-column: 1 / 2;
    grid-row: 1;
    margin-bottom: 8px;
}
.section-header > h2 {
    grid-column: 1 / 3;
    grid-row: 2;
    font-size: 1.9rem;
    color: var(--primary);
    font-weight: 500;
    letter-spacing: 4px;
}
.section-header > .more-link {
    grid-column: 3;
    grid-row: 2;
    color: var(--text-light);
    font-size: 0.88rem;
    letter-spacing: 1px;
    transition: color var(--transition);
    align-self: end;
    justify-self: end;
}
.section-header > .more-link:hover {
    color: var(--primary);
}
.section-header:not(:has(.more-link)) > h2 {
    grid-column: 1 / -1;
}
.section-header-sub {
    margin-top: 80px;
}
.section-header-center {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    border-bottom: none;
    padding-bottom: 0;
    margin-bottom: 56px;
}
.section-header-center > p.section-en {
    grid-column: auto;
    grid-row: auto;
    margin-bottom: 12px;
}
.section-header-center > h2 {
    grid-column: auto;
    grid-row: auto;
}

/* ============ 解决方案（首页） ============ */
.section-solutions {
    padding: 90px 0 100px;
    background: var(--bg);
    overflow: hidden;
}

/* 标题区：SOLUTIONS 作为巨号灰色底纹 + 居中叠加中文标 */
.solutions-title-wrap {
    position: relative;
    text-align: center;
    margin-bottom: 36px;
    height: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.solutions-bg-en {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-family: 'Georgia', 'Times New Roman', serif;
    font-size: 6.5rem;
    font-weight: 700;
    color: #f1f1f1;
    letter-spacing: 12px;
    line-height: 1;
    user-select: none;
    white-space: nowrap;
    z-index: 0;
}

.solutions-title-inner {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0;
}

.solutions-title-inner .section-en {
    display: none;
}

.solutions-title-inner .section-title {
    font-size: 2.2rem;
    font-weight: 500;
    color: var(--primary);
    letter-spacing: 6px;
    margin-bottom: 0;
}

/* 网格：1 大 + 3 小（左 1 大占整高；右 1 大 + 2 小卡） */
.solutions-grid {
    display: grid;
    grid-template-columns: 1.1fr 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 12px;
    height: 520px;
}

.solutions-card {
    display: block;
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

/* 左：大卡占满两行 */
.solutions-card:nth-child(1) {
    grid-column: 1 / 2;
    grid-row: 1 / 3;
}

/* 右上：宽卡 */
.solutions-card:nth-child(2) {
    grid-column: 2 / 4;
    grid-row: 1 / 2;
}

/* 右下左： */
.solutions-card:nth-child(3) {
    grid-column: 2 / 3;
    grid-row: 2 / 3;
}

/* 右下右： */
.solutions-card:nth-child(4) {
    grid-column: 3 / 4;
    grid-row: 2 / 3;
}

.solutions-img {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    transition: transform 0.5s ease, opacity var(--transition);
}

.solutions-card:hover .solutions-img {
    transform: scale(1.04);
    opacity: 0.9;
}

.solutions-overlay {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    padding: 22px 24px;
    background: linear-gradient(to top, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0.5) 50%, rgba(0,0,0,0.1) 100%);
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.solutions-title {
    font-size: 1.05rem;
    font-weight: 500;
    color: #fff;
    letter-spacing: 1px;
    line-height: 1.4;
    text-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

.solutions-line {
    display: block;
    width: 28px;
    height: 2px;
    background: #fff;
    transition: width 0.3s ease;
}

.solutions-card:hover .solutions-line {
    width: 48px;
}

/* ============ 产品中心 ============ */
.section-products {
    padding: 100px 0;
    background: var(--bg);
}

.project-tabs {
    display: flex;
    gap: 0;
    flex-wrap: wrap;
    margin-bottom: 40px;
    border-bottom: 1px solid var(--border);
}

.project-tab {
    padding: 12px 24px;
    background: none;
    border: none;
    font-size: 0.9rem;
    color: var(--text-light);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: color var(--transition), border-color var(--transition);
    font-weight: 400;
    letter-spacing: 1px;
    margin-bottom: -1px;
}

.project-tab:hover {
    color: var(--primary);
}

.project-tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    font-weight: 500;
}

.project-list {
    width: 100%;
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px 24px;
}

.product-card {
    display: block;
    background: #fff;
    border: 1px solid transparent;
    transition: border-color var(--transition);
}

.product-card:hover {
    border-color: var(--border);
}

.product-card:hover .product-img {
    opacity: 0.92;
}

.product-card:hover .product-info h3 {
    color: var(--text-light);
}

.product-img {
    aspect-ratio: 4/3;
    background-size: cover;
    background-position: center;
    background-color: var(--bg-light);
    transition: opacity var(--transition);
}

.product-info {
    padding: 18px 0 0;
}

.product-cat {
    display: inline-block;
    font-size: 0.72rem;
    color: var(--text-lighter);
    letter-spacing: 2px;
    margin-bottom: 8px;
    text-transform: uppercase;
}

.product-info h3 {
    font-size: 1rem;
    font-weight: 500;
    color: var(--primary);
    margin-bottom: 6px;
    line-height: 1.4;
    transition: color var(--transition);
}

.product-info p {
    font-size: 0.85rem;
    color: var(--text-light);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ============ 产品分类卡（首页产品中心顶部网格） ============ */
.product-cat-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 24px;
}

.product-cat-card {
    display: block;
    background: #fff;
    border: 1px solid var(--border);
    transition: border-color var(--transition);
}

.product-cat-card:hover {
    border-color: var(--primary);
}

.product-cat-card:hover .product-cat-img {
    opacity: 0.92;
}

.product-cat-card:hover .product-cat-info h3 {
    color: var(--text-light);
}

.product-cat-img {
    aspect-ratio: 4/3;
    background-size: cover;
    background-position: center;
    background-color: var(--bg-light);
    transition: opacity var(--transition);
}

.product-cat-info {
    padding: 18px 16px 20px;
    text-align: left;
}

.product-cat-en {
    display: block;
    font-size: 0.7rem;
    color: var(--text-lighter);
    letter-spacing: 2px;
    margin-bottom: 6px;
    font-family: 'Georgia', 'Times New Roman', serif;
    text-transform: uppercase;
}

.product-cat-info h3 {
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--primary);
    margin-bottom: 8px;
    letter-spacing: 2px;
    transition: color var(--transition);
}

.product-cat-count {
    font-size: 0.78rem;
    color: var(--text-lighter);
    letter-spacing: 1px;
}

/* ============ 品牌中心（首页） ============ */
.section-technology,
.section-brands {
    padding: 100px 0;
    background: var(--bg);
    border-top: 1px solid var(--border);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.tech-card {
    padding: 44px 32px;
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 12px;
    transition: background var(--transition);
}

.tech-card:last-child {
    border-right: none;
}

.tech-card:hover {
    background: var(--bg-light);
}

.tech-index {
    font-size: 0.85rem;
    color: var(--text-lighter);
    letter-spacing: 2px;
    font-family: 'Georgia', 'Times New Roman', serif;
    margin-bottom: 12px;
}

.tech-en {
    font-size: 0.72rem;
    color: var(--text-lighter);
    letter-spacing: 2px;
    font-family: 'Georgia', 'Times New Roman', serif;
    text-transform: uppercase;
}

.tech-title {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--primary);
    letter-spacing: 3px;
    margin-bottom: 16px;
}

.tech-points {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.tech-points li {
    font-size: 0.88rem;
    color: var(--text-light);
    letter-spacing: 1px;
    padding-left: 14px;
    position: relative;
}

.tech-points li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 1px;
    background: var(--primary);
}

/* ============ 新闻中心（首页） ============ */
.section-news {
    background: var(--bg-light);
    padding: 100px 0;
}

/* 新闻卡片网格：3 列等宽 */
.home-news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px 24px;
}

.home-news-card {
    display: block;
    background: #fff;
    transition: transform var(--transition), box-shadow var(--transition);
    overflow: hidden;
    border: 1px solid var(--border);
}

.home-news-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0,0,0,0.06);
}

.home-news-card:hover .home-news-card-img {
    transform: scale(1.04);
}

.home-news-card-img-wrap {
    overflow: hidden;
    aspect-ratio: 16/10;
}

.home-news-card-img {
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-color: var(--bg-light);
    transition: transform 0.5s ease;
}

.home-news-card-body {
    padding: 20px;
}

.home-news-card-body .news-cat-tag {
    display: inline-block;
    font-size: 0.72rem;
    color: var(--text-lighter);
    letter-spacing: 2px;
    margin-bottom: 10px;
    text-transform: uppercase;
}

.home-news-card-body h3 {
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--primary);
    margin-bottom: 10px;
    line-height: 1.5;
    transition: color var(--transition);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.home-news-card:hover .home-news-card-body h3 {
    color: var(--text-light);
}

.home-news-card-body .news-date {
    display: block;
    font-size: 0.8rem;
    color: var(--text-lighter);
    font-family: 'Georgia', 'Times New Roman', serif;
    letter-spacing: 1px;
}

/* 旧版新闻样式兼容 */
.home-news-split { display: none; }
.home-news-feature { display: none; }
.home-news-list { display: none; }
.home-news-row { display: none; }
.home-news-item { display: none; }

/* ============ 关于我们（首页） ============ */
.section-about {
    background: var(--bg-light);
    color: var(--text);
    padding: 100px 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.section-about .section-header {
    border-bottom-color: var(--border);
}

.section-about .section-header h2 {
    color: var(--text);
}

.section-about .more-link {
    color: var(--text-light);
}

.section-about .more-link:hover {
    color: var(--text);
}

.about-preview {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.about-text p {
    font-size: 1rem;
    line-height: 1.95;
    color: var(--text-light);
    margin-bottom: 32px;
}

.about-text .btn-outline {
    color: var(--primary);
    border-color: var(--primary);
}

.about-text .btn-outline:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.about-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
}

.about-link-card {
    background: #fff;
    padding: 36px 28px;
    text-align: center;
    transition: background var(--transition);
}

.about-link-card:hover {
    background: var(--bg-light);
}

.about-link-card h4 {
    font-size: 1rem;
    color: var(--primary);
    font-weight: 400;
    letter-spacing: 2px;
}

/* ============ 页脚 ============ */
.footer {
    background: var(--bg-dark);
    color: rgba(255,255,255,0.65);
    padding: 70px 0 0;
    border-top: 1px solid rgba(255,255,255,0.08);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer h3 {
    color: #fff;
    font-size: 1.2rem;
    margin-bottom: 20px;
    letter-spacing: 2px;
    font-weight: 500;
}

.footer h4 {
    color: #fff;
    font-size: 0.95rem;
    margin-bottom: 20px;
    letter-spacing: 1px;
    font-weight: 500;
}

.footer-col p {
    font-size: 0.85rem;
    line-height: 1.9;
    color: rgba(255,255,255,0.55);
}

.footer-col a {
    display: block;
    padding: 6px 0;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.55);
    transition: color var(--transition);
}

.footer-col a:hover {
    color: #fff;
}

.footer-bottom {
    text-align: center;
    padding: 24px 0;
    font-size: 0.8rem;
    color: rgba(255,255,255,0.35);
    letter-spacing: 1px;
}

/* ============ 内页 Banner ============ */
.page-banner {
    height: 320px;
    background-size: cover;
    background-position: center;
    position: relative;
    margin-top: 0;
}

.page-banner-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.45);
    display: flex;
    align-items: center;
}

.page-banner h1 {
    color: #fff;
    font-size: 2.4rem;
    letter-spacing: 6px;
    font-weight: 500;
}

.page-banner-slider {
    position: relative;
    height: 400px;
    overflow: hidden;
}

.page-banner-slide {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 0.6s ease;
}

.page-banner-slide.active {
    opacity: 1;
}

.page-banner-dots {
    position: absolute;
    bottom: 24px;
    right: 7%;
    z-index: 10;
    display: flex;
    gap: 6px;
}

.page-banner-dots span {
    width: 24px;
    height: 2px;
    background: rgba(255,255,255,0.4);
    cursor: pointer;
    transition: background 0.2s ease, width 0.2s ease;
}

.page-banner-dots span.active {
    background: #fff;
    width: 40px;
}

.page-banner-simple {
    height: 280px;
}

/* ============ 页面主体 ============ */
.page-body {
    padding: 70px 0;
    min-height: calc(100vh - 600px);
}

/* ============ 面包屑导航 ============ */
.breadcrumb {
    font-size: 1rem;
    color: var(--text-light);
    margin-top: 24px;
    margin-bottom: 32px;
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.breadcrumb a {
    color: var(--text-light);
    transition: color var(--transition);
}

.breadcrumb a:hover {
    color: var(--primary);
}

.breadcrumb-sep {
    color: var(--text-lighter);
    font-size: 0.85rem;
}

.breadcrumb-sep-gap {
    margin-left: 16px;
}

.breadcrumb-current {
    color: var(--primary);
    font-weight: 500;
}

.breadcrumb-extra {
    color: var(--text-light);
    transition: color var(--transition);
}

.breadcrumb-extra:hover {
    color: var(--primary);
}

.breadcrumb-in-topbar {
    margin-top: 0;
    margin-bottom: 0;
    font-size: 0.88rem;
}

.page-topbar-header:has(.breadcrumb-in-topbar) {
    border-bottom: none;
    padding-bottom: 0;
}

.page-topbar-header:has(.breadcrumb-in-topbar) + .project-list-grid,
.page-topbar-header:has(.breadcrumb-in-topbar) + .brand-grid,
.page-topbar-header:has(.breadcrumb-in-topbar) + .no-data {
    margin-top: 32px;
}

.page-sidebar-layout {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 48px;
}

.page-topbar-layout {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.page-topbar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
    gap: 16px;
}

.page-topbar-header h2 {
    font-size: 1.4rem;
    color: var(--primary);
    margin: 0;
    white-space: nowrap;
    letter-spacing: 3px;
    font-weight: 500;
}

.topbar-tabs {
    display: flex;
    gap: 0;
    flex-wrap: wrap;
}

.topbar-tabs a {
    padding: 8px 18px;
    font-size: 0.88rem;
    color: var(--text-light);
    transition: color var(--transition);
    font-weight: 400;
    letter-spacing: 1px;
}

.topbar-tabs a:hover {
    color: var(--primary);
}

.topbar-tabs a.active {
    color: var(--primary);
    font-weight: 500;
}

.topbar-desc {
    color: var(--text-light);
    font-size: 0.85rem;
    margin: 0;
    max-width: 400px;
}

.jobs-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.page-topbar-content {
    min-height: 300px;
}

.page-center-layout {
    max-width: 900px;
    margin: 0 auto;
}

.page-sidebar {
    background: var(--bg-light);
    padding: 28px 24px;
    position: sticky;
    top: 100px;
    align-self: start;
}

.page-sidebar h3 {
    font-size: 1.05rem;
    color: var(--primary);
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border-dark);
    margin-bottom: 16px;
    letter-spacing: 2px;
    font-weight: 500;
}

.sidebar-nav a {
    display: block;
    padding: 10px 16px;
    color: var(--text-light);
    font-size: 0.9rem;
    transition: background var(--transition), color var(--transition);
    margin-bottom: 2px;
    letter-spacing: 1px;
}

.sidebar-nav a:hover {
    background: #fff;
    color: var(--primary);
}

.sidebar-nav a.active {
    background: var(--primary);
    color: #fff;
}

.page-content-title {
    font-size: 1.5rem;
    color: var(--primary);
    margin-bottom: 28px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border);
    letter-spacing: 3px;
    font-weight: 500;
}

.page-content-desc {
    color: var(--text-light);
    margin-bottom: 32px;
    line-height: 1.9;
}

/* ============ 公司简介 ============ */
.company-intro {
    margin-bottom: 40px;
}

.company-intro-header {
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 32px;
}

.company-name-cn {
    font-size: 1.4rem;
    font-weight: 500;
    color: var(--primary);
    margin-bottom: 4px;
    letter-spacing: 3px;
}

.company-name-en {
    font-size: 0.85rem;
    color: var(--text-lighter);
    margin: 0;
    letter-spacing: 2px;
    font-family: 'Georgia', 'Times New Roman', serif;
}

.company-intro-body {
    display: grid;
    grid-template-columns: 340px 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.intro-left {
    background: var(--bg-light);
    padding: 36px 28px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.intro-left .company-name-cn {
    font-size: 1.25rem;
    color: var(--primary);
    margin-bottom: 6px;
}

.intro-left .company-name-en {
    font-size: 1rem;
    color: var(--text-light);
    margin-bottom: 16px;
}

.intro-divider {
    height: 1px;
    background: var(--border);
    width: 100%;
}

.intro-slogan {
    font-size: 1rem;
    color: var(--text);
    line-height: 1.9;
}

.intro-highlight {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin: 32px 0;
}

.intro-stat {
    text-align: left;
    padding: 24px 0;
    border-top: 1px solid var(--border);
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 500;
    color: var(--primary);
    line-height: 1.2;
    font-family: 'Georgia', 'Times New Roman', serif;
}

.stat-label {
    display: block;
    font-size: 0.82rem;
    color: var(--text-lighter);
    margin-top: 6px;
    letter-spacing: 1px;
}

.intro-right p,
.intro-text p {
    margin-bottom: 16px;
    line-height: 1.95;
    color: var(--text);
    text-align: justify;
    font-size: 0.95rem;
}

.intro-text p {
    text-indent: 2em;
}

.company-showcase {
    position: relative;
    overflow: hidden;
    background: var(--bg-light);
}

.showcase-img {
    width: 100%;
    height: 380px;
    object-fit: cover;
    display: block;
}

.showcase-overlay {
    background: var(--bg-dark);
    color: #fff;
    padding: 40px 48px;
    margin-top: -1px;
}

.showcase-top {
    display: flex;
    align-items: baseline;
    gap: 6px;
    margin-bottom: 8px;
}

.showcase-label {
    font-size: 1rem;
    color: rgba(255,255,255,0.7);
    font-weight: 400;
    letter-spacing: 2px;
}

.showcase-number {
    font-size: 3rem;
    font-weight: 500;
    color: #fff;
    line-height: 1;
    font-family: 'Georgia', 'Times New Roman', serif;
}

.showcase-subtitle {
    color: rgba(255,255,255,0.65);
    font-size: 0.88rem;
    margin: 0 0 28px 0;
    letter-spacing: 1px;
}

.showcase-stats {
    display: flex;
    gap: 36px;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.15);
}

.showcase-stat {
    display: flex;
    flex-direction: column;
}

.stat-num {
    font-size: 1.3rem;
    font-weight: 500;
    color: #fff;
    line-height: 1.3;
    font-family: 'Georgia', 'Times New Roman', serif;
}

.stat-text {
    font-size: 0.78rem;
    color: rgba(255,255,255,0.6);
    margin-top: 4px;
    letter-spacing: 1px;
}

/* ============ 文章详情 ============ */
.article-detail {
    margin-bottom: 32px;
}

.article-title {
    font-size: 1.8rem;
    color: var(--primary);
    margin-bottom: 16px;
    line-height: 1.4;
    letter-spacing: 2px;
    font-weight: 500;
}

.article-meta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    color: var(--text-lighter);
    font-size: 0.85rem;
    margin-bottom: 28px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}

.article-image {
    margin-bottom: 28px;
    overflow: hidden;
}

.article-image img {
    width: 100%;
    display: block;
}

.article-body {
    line-height: 1.95;
    font-size: 1rem;
    color: var(--text);
}

.article-body p {
    margin-bottom: 18px;
    text-indent: 2em;
}

.article-body h2,
.article-body h3,
.article-body h4 {
    color: var(--primary);
    margin: 24px 0 12px;
    font-weight: 500;
}

.article-body img {
    max-width: 100%;
    height: auto;
    margin: 16px 0;
}

.article-nav {
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}

.article-nav a {
    color: var(--text-light);
    font-size: 0.9rem;
    transition: color var(--transition);
}

.article-nav a:hover {
    color: var(--primary);
}

/* ============ 新闻列表页 ============ */
.news-list-page {
    display: flex;
    flex-direction: column;
}

.news-grid-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 40px;
}

.news-grid-item {
    display: block;
    padding: 22px 0;
    border-bottom: 1px solid var(--border);
    position: relative;
    transition: padding var(--transition);
}

.news-grid-item:hover {
    padding-left: 8px;
}

.news-grid-item:hover h3 {
    color: var(--text-light);
}

.news-grid-item h3 {
    font-size: 1.05rem;
    font-weight: 400;
    color: var(--text);
    margin-bottom: 10px;
    line-height: 1.6;
    transition: color var(--transition);
}

.news-grid-item .top-tag {
    margin-right: 6px;
}

.news-grid-item .news-date {
    display: block;
    font-size: 0.8rem;
    color: var(--text-lighter);
    font-family: 'Georgia', 'Times New Roman', serif;
}

.news-list-item {
    display: flex;
    gap: 24px;
    padding: 28px 0;
    border-bottom: 1px solid var(--border);
    transition: background var(--transition);
}

.news-list-item:hover {
    background: var(--bg-light);
}

.news-list-thumb {
    width: 220px;
    height: 140px;
    background-size: cover;
    background-position: center;
    background-color: var(--bg-light);
    flex-shrink: 0;
}

.news-list-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.news-list-body h3 {
    font-size: 1.1rem;
    color: var(--text);
    margin-bottom: 10px;
    transition: color var(--transition);
    font-weight: 500;
}

.news-list-item:hover .news-list-body h3 {
    color: var(--text-light);
}

.top-tag {
    display: inline-block;
    padding: 1px 8px;
    background: var(--primary);
    color: #fff;
    font-size: 0.7rem;
    margin-right: 8px;
    vertical-align: middle;
    letter-spacing: 1px;
}

.news-summary {
    color: var(--text-light);
    font-size: 0.88rem;
    margin-bottom: 10px;
    line-height: 1.7;
}

.news-meta {
    display: flex;
    gap: 16px;
    font-size: 0.8rem;
    color: var(--text-lighter);
}

/* ============ 分页 ============ */
.pagination {
    display: flex;
    justify-content: center;
    gap: 4px;
    margin-top: 48px;
    flex-wrap: wrap;
}

.page-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    border: 1px solid var(--border);
    font-size: 0.88rem;
    color: var(--text);
    transition: border-color var(--transition), color var(--transition), background var(--transition);
    background: #fff;
}

.page-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.page-btn.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

/* ============ 产品列表 ============ */
.project-list-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px 24px;
}

.project-list-card-link {
    display: block;
    text-decoration: none;
    color: inherit;
}

.project-list-card {
    background: #fff;
    transition: opacity var(--transition);
}

.project-list-card-link:hover .project-list-card {
    opacity: 0.85;
}

.project-list-card-link:hover .project-list-info h3 {
    color: var(--text-light);
}

.project-list-img {
    aspect-ratio: 4/3;
    background-size: cover;
    background-position: center;
    background-color: var(--bg-light);
    position: relative;
}

.project-list-overlay {
    position: absolute;
    top: 12px;
    left: 12px;
}

.project-list-overlay .project-cat {
    background: #fff;
    color: var(--primary);
    padding: 4px 10px;
    font-size: 0.72rem;
    letter-spacing: 1px;
}

.project-list-info {
    padding: 18px 0 0;
}

.project-list-info h3 {
    font-size: 1rem;
    color: var(--primary);
    margin-bottom: 6px;
    font-weight: 500;
    transition: color var(--transition);
}

.project-list-info p {
    color: var(--text-light);
    font-size: 0.85rem;
    line-height: 1.6;
}

/* ============ 招聘列表 ============ */
.jobs-list {
    display: flex;
    flex-direction: column;
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
}

.job-card-link {
    display: block;
    text-decoration: none;
    color: inherit;
}

.job-card {
    background: #fff;
    transition: background var(--transition);
}

.job-card-link:hover .job-card {
    background: var(--bg-light);
}

.job-header {
    padding: 24px 28px;
}

.job-title-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
    gap: 16px;
    flex-wrap: wrap;
}

.job-title-row h3 {
    font-size: 1.2rem;
    color: var(--primary);
    font-weight: 500;
    letter-spacing: 1px;
}

.job-salary {
    color: var(--text);
    font-weight: 500;
    font-size: 0.95rem;
}

.job-meta {
    display: flex;
    gap: 24px;
    color: var(--text-lighter);
    font-size: 0.85rem;
    flex-wrap: wrap;
}

.job-preview {
    padding: 0 28px 24px;
    color: var(--text-light);
    font-size: 0.88rem;
    line-height: 1.7;
}

.job-section {
    margin-bottom: 16px;
}

.job-section h4 {
    font-size: 0.95rem;
    color: var(--primary);
    margin-bottom: 10px;
    font-weight: 500;
    letter-spacing: 1px;
}

.job-section p {
    color: var(--text-light);
    font-size: 0.92rem;
    line-height: 1.75;
}

.job-detail {
    background: #fff;
    border: 1px solid var(--border);
    overflow: hidden;
}

.job-detail-header {
    padding: 36px;
    border-bottom: 1px solid var(--border);
}

.job-detail-header h1 {
    font-size: 1.6rem;
    color: var(--primary);
    margin-bottom: 16px;
    letter-spacing: 2px;
    font-weight: 500;
}

.job-detail-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    color: var(--text-light);
    font-size: 0.9rem;
}

.job-detail-meta strong {
    color: var(--text);
    font-weight: 500;
}

.job-detail-section {
    padding: 28px 36px;
    border-bottom: 1px solid var(--border);
}

.job-detail-section h3 {
    font-size: 1rem;
    color: var(--primary);
    margin-bottom: 16px;
    letter-spacing: 2px;
    font-weight: 500;
}

.job-detail-content {
    color: var(--text);
    line-height: 1.85;
    font-size: 0.95rem;
}

.job-detail-apply {
    padding: 36px;
    text-align: center;
    background: var(--bg-light);
}

.apply-email-box {
    margin-bottom: 20px;
}

.apply-email-box p {
    color: var(--text-light);
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.apply-email {
    font-size: 1.4rem;
    color: var(--primary);
    font-weight: 500;
    text-decoration: none;
    transition: color var(--transition);
    letter-spacing: 1px;
}

.apply-email:hover {
    color: var(--text-light);
}

.job-detail-nav {
    padding: 24px 36px;
    text-align: center;
}

/* ============ 产品详情 ============ */
.project-detail {
    background: #fff;
    border: 1px solid var(--border);
    overflow: hidden;
}

.project-detail-meta {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    color: var(--text-lighter);
    font-size: 0.85rem;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--border);
}

.project-detail-section {
    padding: 28px 36px;
}

.project-detail-section h3 {
    font-size: 1rem;
    color: var(--primary);
    margin-bottom: 16px;
    letter-spacing: 2px;
    font-weight: 500;
}

.project-detail-content p {
    line-height: 1.95;
    color: var(--text);
    font-size: 0.95rem;
    margin-bottom: 14px;
}

.project-detail-body {
    margin-top: 16px;
    line-height: 1.85;
}

.project-detail-body img {
    max-width: 100%;
    height: auto;
    margin: 14px 0;
}

/* ============ 产品详情页丰富内容样式 ============ */
.project-detail-body .pd-section-title {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--primary);
    letter-spacing: 3px;
    margin: 48px 0 24px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--primary);
    display: inline-block;
}

.project-detail-body .pd-overview {
    font-size: 1.05rem;
    color: var(--text-light);
    line-height: 1.9;
    padding: 24px 28px;
    background: var(--bg-light);
    border-left: 4px solid var(--primary);
    margin-bottom: 8px;
}

/* 产品详情图文介绍 */
.project-detail-body .pd-intro {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 40px;
    align-items: start;
    margin-bottom: 16px;
}

.project-detail-body .pd-intro-text p {
    font-size: 0.95rem;
    color: var(--text);
    line-height: 1.9;
    margin-bottom: 14px;
}

.project-detail-body .pd-intro-img {
    background: var(--bg-light);
    padding: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-detail-body .pd-intro-img img {
    max-width: 100%;
    height: auto;
    margin: 0;
}

/* 产品展示画廊 */
.project-detail-body .pd-gallery-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 16px;
}

.project-detail-body .pd-gallery-item {
    background: var(--bg-light);
    padding: 16px;
    text-align: center;
    transition: box-shadow 0.3s ease;
}

.project-detail-body .pd-gallery-item:hover {
    box-shadow: var(--shadow-lg);
}

.project-detail-body .pd-gallery-item img {
    width: 100%;
    height: 160px;
    object-fit: contain;
    margin: 0 0 10px;
}

.project-detail-body .pd-gallery-caption {
    font-size: 0.82rem;
    color: var(--text-lighter);
    letter-spacing: 1px;
}

/* 尺寸图 */
.project-detail-body .pd-dim-wrap {
    background: var(--bg-light);
    padding: 32px;
    text-align: center;
}

.project-detail-body .pd-dim-wrap img {
    max-width: 100%;
    height: auto;
    margin: 0;
}

/* 产品特点 */
.project-detail-body .pd-features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 16px;
}

.project-detail-body .pd-feature-item {
    padding: 32px 24px;
    border: 1px solid var(--border);
    background: var(--bg);
    text-align: center;
    transition: all 0.35s ease;
}

.project-detail-body .pd-feature-item:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

.project-detail-body .pd-feature-icon {
    color: var(--primary);
    margin-bottom: 16px;
    display: flex;
    justify-content: center;
}

.project-detail-body .pd-feature-item h5 {
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 2px;
    margin-bottom: 10px;
    color: var(--text);
}

.project-detail-body .pd-feature-item p {
    font-size: 0.88rem;
    color: var(--text-light);
    line-height: 1.75;
    margin-bottom: 0;
}

/* 技术规格表格 */
.project-detail-body .pd-specs-table-wrap {
    overflow-x: auto;
    margin-bottom: 16px;
}

.project-detail-body .pd-specs-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.92rem;
}

.project-detail-body .pd-specs-table th,
.project-detail-body .pd-specs-table td {
    padding: 14px 20px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.project-detail-body .pd-specs-table th {
    width: 35%;
    font-weight: 600;
    color: var(--text);
    background: var(--bg-light);
    letter-spacing: 1px;
    white-space: nowrap;
}

.project-detail-body .pd-specs-table td {
    color: var(--text-light);
}

.project-detail-body .pd-specs-table tr:hover th,
.project-detail-body .pd-specs-table tr:hover td {
    background: rgba(0,0,0,0.02);
}

/* 响应式 */
@media (max-width: 1024px) {
    .project-detail-body .pd-intro {
        grid-template-columns: 1fr;
    }
    .project-detail-body .pd-gallery-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .project-detail-body .pd-features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .project-detail-body .pd-gallery-grid {
        grid-template-columns: 1fr;
    }
    .project-detail-body .pd-features-grid {
        grid-template-columns: 1fr;
    }
    .project-detail-body .pd-specs-table th {
        width: 45%;
    }
    .project-detail-body .pd-overview {
        padding: 18px 20px;
    }
}

/* 产品详情 Hero：左图右文（参照解决方案详情页） */
.project-detail-hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: center;
    margin: 56px;
}

.project-detail-hero.no-image {
    grid-template-columns: 1fr;
    justify-items: start;
}

.project-detail-hero-img {
    width: 100%;
    aspect-ratio: 4/3;
    background-size: cover;
    background-position: center;
}

.project-detail-hero-content {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.project-detail-hero-content .project-detail-cat {
    font-size: 0.78rem;
    color: var(--text-lighter);
    letter-spacing: 4px;
    margin-bottom: 0;
    text-transform: uppercase;
}

.project-detail-hero-content h1 {
    font-size: 2rem;
    font-weight: 500;
    color: var(--primary);
    letter-spacing: 3px;
    line-height: 1.3;
}

.project-detail-hero-content .project-detail-summary {
    font-size: 0.95rem;
    color: var(--text-light);
    line-height: 1.85;
    margin-bottom: 8px;
}

/* ============ 搜索按钮 ============ */
.header-actions {
    flex-shrink: 0;
    display: flex;
    align-items: center;
}

/* ============ 搜索弹窗 ============ */
.search-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color var(--transition);
}

.header.scrolled .search-toggle {
    color: var(--text);
}

.search-toggle:hover {
    color: rgba(255,255,255,0.6);
}

.header.scrolled .search-toggle:hover {
    color: var(--primary);
}

.search-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 9999;
    display: none;
    align-items: flex-start;
    justify-content: center;
}

.search-modal.active {
    display: flex;
}

.search-modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
}

.search-modal-content {
    position: relative;
    width: 100%;
    max-width: 680px;
    margin-top: 120px;
    background: #fff;
    overflow: hidden;
}

.search-modal-header {
    display: flex;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    gap: 16px;
}

.search-input-wrapper {
    flex: 1;
    display: flex;
    align-items: center;
    background: var(--bg-light);
    padding: 0 16px;
}

.search-input-wrapper svg {
    color: var(--text-lighter);
    flex-shrink: 0;
}

.search-input-wrapper input {
    flex: 1;
    border: none;
    background: none;
    padding: 14px 12px;
    font-size: 1rem;
    outline: none;
    color: var(--text);
}

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

.search-clear {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-lighter);
    cursor: pointer;
    padding: 4px 8px;
    display: none;
}

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

.search-close {
    background: none;
    border: none;
    color: var(--primary);
    font-size: 0.9rem;
    cursor: pointer;
    padding: 8px 12px;
    transition: color var(--transition);
    letter-spacing: 1px;
}

.search-close:hover {
    color: var(--text-light);
}

.search-modal-body {
    max-height: 60vh;
    overflow-y: auto;
}

.search-hot {
    padding: 20px;
}

.search-hot h4 {
    font-size: 0.82rem;
    color: var(--text-lighter);
    margin-bottom: 12px;
    font-weight: 500;
    letter-spacing: 1px;
}

.search-hot-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.search-tag {
    padding: 6px 14px;
    background: var(--bg-light);
    font-size: 0.85rem;
    color: var(--text);
    cursor: pointer;
    transition: background var(--transition), color var(--transition);
}

.search-tag:hover {
    background: var(--primary);
    color: #fff;
}

.search-results {
    padding: 0;
}

.search-results-empty,
.search-results-loading,
.search-no-result {
    padding: 40px 20px;
    text-align: center;
    color: var(--text-lighter);
    font-size: 0.9rem;
}

.search-result-group {
    border-top: 1px solid var(--border);
}

.search-result-group:first-child {
    border-top: none;
}

.search-result-group-title {
    padding: 12px 20px;
    font-size: 0.8rem;
    color: var(--text-lighter);
    background: var(--bg-light);
    font-weight: 500;
    letter-spacing: 1px;
}

.search-result-item {
    display: block;
    padding: 14px 20px;
    border-bottom: 1px solid var(--border);
    transition: background var(--transition);
    text-decoration: none;
    color: inherit;
}

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

.search-result-item:hover {
    background: var(--bg-light);
}

.search-result-title {
    font-size: 0.95rem;
    color: var(--text);
    margin-bottom: 4px;
    font-weight: 500;
}

.search-result-title mark {
    background: #f0f0f0;
    color: var(--primary);
    padding: 0 2px;
}

.search-result-meta {
    font-size: 0.8rem;
    color: var(--text-lighter);
}

.search-result-meta span {
    margin-right: 12px;
}

/* ============ 响应式：≤1024px ============ */
@media (max-width: 1024px) {
    :root {
        --content-width: 90%;
    }

    .project-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .home-news-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .home-news-item.feature {
        grid-column: span 2;
        grid-row: auto;
    }

    .home-news-item.feature .home-news-img {
        aspect-ratio: 16/9;
    }

    .about-preview {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .intro-white-stats {
        flex-wrap: wrap;
    }

    .intro-white-stats .intro-stat-item {
        flex: 1 1 50%;
    }

    .intro-white-stats .intro-stat-item:nth-child(2)::after {
        display: none;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }

    .page-sidebar-layout {
        grid-template-columns: 200px 1fr;
        gap: 32px;
    }

    .intro-highlight {
        grid-template-columns: repeat(2, 1fr);
    }

    .project-list-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .nav > a,
    .nav-dropdown > a {
        padding: 10px 14px;
        font-size: 0.88rem;
    }

    /* 1024px 以下启用汉堡菜单，避免导航项挤压 logo */
    .nav-toggle {
        display: flex;
        z-index: 1001;
        margin-left: auto;
    }

    .nav {
        position: fixed;
        top: 76px;
        left: 0;
        right: 0;
        bottom: 0;
        background: #fff;
        flex-direction: column;
        padding: 0;
        gap: 0;
        overflow-y: auto;
        z-index: 999;
        transform: translateX(100%);
        transition: transform 0.3s ease;
        -webkit-overflow-scrolling: touch;
    }

    .nav.open {
        transform: translateX(0);
    }

    .nav > a,
    .nav-dropdown > a {
        padding: 14px 22px;
        border-bottom: 1px solid var(--border);
        width: 100%;
        color: var(--text);
        font-size: 0.95rem;
        text-align: left;
        display: flex;
        justify-content: flex-start;
        align-items: center;
    }

    .nav-dropdown {
        width: 100%;
    }

    .nav > a:hover,
    .nav-dropdown > a:hover {
        color: var(--text-light);
        background: var(--bg-light);
    }

    .dropdown-menu {
        display: none !important;
    }

    .section-header h2,
    .section-title {
        font-size: 1.6rem;
    }

    .banner-text-title {
        font-size: 1.5rem;
    }

    .banner-text-desc {
        font-size: 0.88rem;
    }

    .banner-text-inner {
        max-width: 80%;
    }

    /* 产品分类卡：5 → 3 列 */
    .product-cat-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    /* 核心技术：4 → 2 列 */
    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .tech-card:nth-child(2) {
        border-right: none;
    }
    .tech-card:nth-child(-n+2) {
        border-bottom: 1px solid var(--border);
    }

    /* 关键数据：4 → 2 列 */
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .stat-item:nth-child(2) {
        border-right: none;
    }
    .stat-item:nth-child(-n+2) {
        border-bottom: 1px solid var(--border);
    }

    /* 新闻分区：左右叠成单列 */
    .home-news-split {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .home-news-feature {
        grid-template-columns: 1fr 1fr;
        grid-template-rows: auto auto;
        gap: 16px;
    }
    .home-news-item.feature {
        grid-column: 1 / 3;
        grid-row: auto;
    }
    .home-news-item:not(.feature) {
        grid-column: auto;
        grid-row: auto;
    }
    .home-news-item.feature .home-news-img {
        aspect-ratio: 16/9;
    }

    /* 解决方案：左侧大卡片变上方全宽，其余并排 */
    .solutions-grid {
        grid-template-columns: 1fr 1fr;
        grid-template-rows: auto auto;
        height: auto;
    }
    .solutions-card:nth-child(1) {
        grid-column: 1 / 3;
        grid-row: 1 / 2;
        aspect-ratio: 16/9;
    }
    .solutions-card:nth-child(2) {
        grid-column: 1 / 3;
        grid-row: 2 / 3;
        aspect-ratio: 16/9;
    }
    .solutions-card:nth-child(3) {
        grid-column: 1 / 2;
        grid-row: 3 / 4;
        aspect-ratio: 4/3;
    }
    .solutions-card:nth-child(4) {
        grid-column: 2 / 3;
        grid-row: 3 / 4;
        aspect-ratio: 4/3;
    }

    .solutions-bg-en {
        font-size: 5rem;
        letter-spacing: 8px;
    }
}

/* ============ 响应式：≤768px ============ */
@media (max-width: 768px) {
    :root {
        --content-width: 92%;
    }

    .header-inner {
        height: 60px;
    }

    .logo a {
        font-size: 1rem;
        letter-spacing: 2px;
    }

    .logo-img {
        height: 24px;
    }

    .nav {
        top: 60px;
    }

    .nav-overlay {
        top: 60px;
    }

    .banner-text-title {
        font-size: 1.3rem;
        letter-spacing: 2px;
    }

    .banner-text-desc {
        font-size: 0.82rem;
        line-height: 1.6;
    }

    .banner-text-inner {
        max-width: 90%;
    }

    .counter-current {
        font-size: 1.2rem;
    }

    .section-banner {
        height: 88vh;
        min-height: 480px;
    }

    .section-intro,
    .section-products,
    .section-news,
    .section-about,
    .section-brands,
    .section-technology,
    .section-solutions {
        padding: 60px 0;
    }

    .section-title {
        font-size: 1.5rem;
        letter-spacing: 4px;
    }

    .section-header {
        margin-bottom: 32px;
        padding-bottom: 16px;
        flex-wrap: wrap;
        gap: 12px;
        grid-template-columns: 1fr;
    }

    .section-header > p.section-en,
    .section-header > h2,
    .section-header > .more-link {
        grid-column: 1;
        grid-row: auto;
    }

    .section-header h2 {
        font-size: 1.35rem;
    }

    .more-link {
        font-size: 0.82rem;
    }

    /* 产品分类卡：3 → 2 列 */
    .product-cat-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    /* 核心技术：2 → 1 列 */
    .tech-grid {
        grid-template-columns: 1fr;
    }
    .tech-card {
        border-right: none;
        border-bottom: 1px solid var(--border);
    }
    .tech-card:last-child {
        border-bottom: none;
    }

    /* 关键数据：2 → 1 列 */
    .stats-grid {
        grid-template-columns: 1fr;
    }
    .stat-item {
        border-right: none;
        border-bottom: 1px solid var(--border);
    }
    .stat-item:last-child {
        border-bottom: none;
    }

    /* 新闻分区：主图 3 → 1 列 */
    .home-news-feature {
        grid-template-columns: 1fr;
    }

    /* 新闻列表行：日期/分类/标题纵向堆叠 */
    .home-news-row {
        grid-template-columns: 1fr;
        gap: 6px;
        padding: 18px 0;
    }

    .section-header-sub {
        margin-top: 56px;
    }

    /* 解决方案：全部单列堆叠 */
    .solutions-grid {
        grid-template-columns: 1fr;
        grid-template-rows: auto;
        gap: 12px;
    }
    .solutions-card:nth-child(1),
    .solutions-card:nth-child(2),
    .solutions-card:nth-child(3),
    .solutions-card:nth-child(4) {
        grid-column: 1;
        grid-row: auto;
        aspect-ratio: 16/10;
    }
    .solutions-overlay {
        padding: 20px;
    }
    .solutions-title {
        font-size: 1rem;
    }

    .solutions-title-wrap {
        height: 64px;
    }
    .solutions-bg-en {
        font-size: 3.4rem;
        letter-spacing: 5px;
    }
    .solutions-title-inner .section-title {
        font-size: 1.5rem;
    }

    .project-tabs {
        margin-bottom: 28px;
        overflow-x: auto;
        flex-wrap: nowrap;
        -webkit-overflow-scrolling: touch;
        -ms-overflow-style: none;
        scrollbar-width: none;
    }

    .project-tabs::-webkit-scrollbar {
        display: none;
    }

    .project-tab {
        white-space: nowrap;
        flex-shrink: 0;
        padding: 10px 16px;
    }

    .project-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .home-news-grid {
        grid-template-columns: 1fr;
    }

    .home-news-item.feature {
        grid-column: auto;
        grid-row: auto;
    }

    .home-news-item.feature .home-news-img {
        aspect-ratio: 16/10;
        flex: none;
    }

    .home-news-item.feature .home-news-body h3 {
        font-size: 1.15rem;
    }

    .about-links {
        grid-template-columns: 1fr 1fr;
    }

    .page-sidebar-layout {
        grid-template-columns: 1fr;
    }

    .page-sidebar {
        position: static;
        padding: 18px;
    }

    .sidebar-nav {
        display: flex;
        flex-wrap: wrap;
        gap: 4px;
    }

    .sidebar-nav a {
        padding: 6px 14px;
        font-size: 0.85rem;
    }

    .page-topbar-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .page-topbar-header h2 {
        font-size: 1.2rem;
    }

    .topbar-tabs {
        width: 100%;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        flex-wrap: nowrap;
        padding-bottom: 4px;
        -ms-overflow-style: none;
        scrollbar-width: none;
    }

    .topbar-tabs::-webkit-scrollbar {
        display: none;
    }

    .topbar-tabs a {
        padding: 8px 14px;
        font-size: 0.85rem;
        white-space: nowrap;
        flex-shrink: 0;
    }

    .news-grid-list {
        grid-template-columns: 1fr;
    }

    .news-grid-item h3 {
        font-size: 0.98rem;
    }

    .jobs-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .job-title-row h3 {
        font-size: 1.1rem;
    }

    .job-salary {
        font-size: 0.88rem;
    }

    .job-meta {
        font-size: 0.8rem;
        gap: 12px;
    }

    .project-detail-hero {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .project-detail-hero-content h1 {
        font-size: 1.5rem;
    }

    .project-detail-info,
    .project-detail-section {
        padding-left: 20px;
        padding-right: 20px;
    }

    .company-intro-body {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .intro-left {
        padding: 24px 20px;
    }

    .intro-left .company-name-cn {
        font-size: 1.1rem;
    }

    .intro-left .company-name-en {
        font-size: 0.95rem;
    }

    .intro-slogan {
        font-size: 0.92rem;
    }

    .intro-right p {
        font-size: 0.9rem;
        line-height: 1.85;
    }

    .intro-highlight {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .intro-stat {
        padding: 18px 0;
    }

    .stat-number {
        font-size: 1.6rem;
    }

    .stat-label {
        font-size: 0.78rem;
    }

    .showcase-img {
        height: 220px;
    }

    .showcase-overlay {
        padding: 28px 24px;
    }

    .showcase-number {
        font-size: 2.4rem;
    }

    .showcase-label {
        font-size: 0.95rem;
    }

    .showcase-subtitle {
        font-size: 0.82rem;
        margin-bottom: 20px;
    }

    .showcase-stats {
        gap: 20px;
        padding-top: 16px;
    }

    .stat-num {
        font-size: 1.1rem;
    }

    .stat-text {
        font-size: 0.72rem;
    }

    .page-banner {
        height: 180px;
    }

    .page-banner h1 {
        font-size: 1.5rem;
        letter-spacing: 3px;
    }

    .page-banner-slider {
        height: 240px;
    }

    .page-body {
        padding: 40px 0;
    }

    .article-title {
        font-size: 1.35rem;
    }

    .article-meta {
        font-size: 0.82rem;
        gap: 10px;
    }

    .article-body {
        font-size: 0.95rem;
    }

    .job-detail-header {
        padding: 24px 20px;
    }

    .job-detail-header h1 {
        font-size: 1.3rem;
    }

    .job-detail-meta {
        gap: 12px;
        font-size: 0.85rem;
    }

    .job-detail-section {
        padding: 22px 20px;
    }

    .job-detail-apply {
        padding: 28px 20px;
    }

    .apply-email {
        font-size: 1.15rem;
    }

    .job-detail-nav {
        padding: 20px;
    }

    .news-list-item {
        flex-direction: column;
    }

    .news-list-thumb {
        width: 100%;
        height: 180px;
    }

    .news-list-body h3 {
        font-size: 1rem;
    }

    .project-list-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .footer {
        padding: 48px 0 0;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    .footer h3 {
        font-size: 1.05rem;
    }

    .footer h4 {
        font-size: 0.9rem;
        margin-bottom: 12px;
    }

    .footer-col a,
    .footer-col p {
        font-size: 0.82rem;
    }

    .about-link-card {
        padding: 24px 16px;
    }

    .about-link-card h4 {
        font-size: 0.92rem;
    }

    .about-text p {
        font-size: 0.92rem;
        line-height: 1.85;
    }

    .btn {
        padding: 10px 22px;
        font-size: 0.85rem;
    }

    .btn-lg {
        padding: 12px 30px;
        font-size: 0.92rem;
    }

    .pagination {
        gap: 4px;
        margin-top: 32px;
    }

    .page-btn {
        min-width: 36px;
        height: 36px;
        font-size: 0.82rem;
    }

    .search-modal-content {
        margin-top: 0;
        max-width: 100%;
        height: 100%;
        display: flex;
        flex-direction: column;
    }

    .search-modal-body {
        flex: 1;
        max-height: none;
    }

    .search-modal-header {
        padding: 12px 16px;
    }

    .search-input-wrapper input {
        padding: 12px 10px;
        font-size: 16px;
    }
}

/* ============ 响应式：≤480px ============ */
@media (max-width: 480px) {
    :root {
        --content-width: 94%;
    }

    .banner-text-title {
        font-size: 1.15rem;
        letter-spacing: 1px;
    }

    .banner-text-desc {
        font-size: 0.78rem;
        line-height: 1.5;
    }

    .banner-text-inner {
        max-width: 95%;
    }

    .banner-dots {
        margin-top: 14px;
        gap: 8px;
    }

    .banner-dots .dot {
        width: 8px;
        height: 8px;
    }

    .section-intro .intro-title {
        font-size: 1.3rem;
    }

    .section-header h2 {
        font-size: 1.2rem;
    }

    .section-intro,
    .section-products,
    .section-news,
    .section-about {
        padding: 48px 0;
    }

    .intro-highlight {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }

    .stat-number {
        font-size: 1.4rem;
    }

    .stat-label {
        font-size: 0.72rem;
    }

    .about-links {
        grid-template-columns: 1fr;
    }

    .about-link-card {
        padding: 18px 14px;
    }

    .about-link-card h4 {
        font-size: 0.9rem;
    }

    .page-banner {
        height: 150px;
    }

    .page-banner h1 {
        font-size: 1.25rem;
    }

    .page-banner-slider {
        height: 200px;
    }

    .article-title {
        font-size: 1.2rem;
    }

    .job-title-row h3 {
        font-size: 1.05rem;
    }

    .project-detail-image {
        height: 180px;
    }

    .showcase-img {
        height: 180px;
    }

    .showcase-overlay {
        padding: 22px 18px;
    }

    .showcase-number {
        font-size: 2rem;
    }

    .footer {
        padding: 36px 0 0;
    }

    .footer-bottom {
        padding: 16px 0;
        font-size: 0.78rem;
    }

    .btn {
        padding: 8px 18px;
    }

    .btn-lg {
        padding: 12px 24px;
        font-size: 0.88rem;
    }
}

/* ============ 品牌卡片（主营产品） ============ */
.brand-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.brand-card {
    display: block;
    background: var(--bg);
    border: 1px solid var(--border);
    transition: border-color var(--transition), box-shadow var(--transition);
    overflow: hidden;
}

.brand-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
}

.brand-img {
    width: 100%;
    height: 360px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    background: var(--bg-light);
    position: relative;
}

.brand-img img {
    max-width: 80%;
    max-height: 200px;
    object-fit: contain;
}

.brand-content {
    padding: 28px 24px;
}

.brand-en {
    font-size: 0.72rem;
    color: var(--text-lighter);
    letter-spacing: 3px;
    margin-bottom: 8px;
    font-family: 'Georgia', 'Times New Roman', serif;
}

.brand-name {
    font-size: 1.3rem;
    font-weight: 500;
    color: var(--primary);
    margin-bottom: 6px;
    letter-spacing: 1px;
}

.brand-country {
    display: inline-block;
    font-size: 0.78rem;
    color: var(--text-lighter);
    border: 1px solid var(--border);
    padding: 2px 10px;
    margin-bottom: 14px;
}

.brand-desc {
    font-size: 0.88rem;
    color: var(--text-light);
    line-height: 1.75;
    margin-bottom: 18px;
}

.brand-link {
    font-size: 0.85rem;
    color: var(--primary);
    letter-spacing: 1px;
    font-weight: 500;
    transition: opacity var(--transition);
}

.brand-card:hover .brand-link {
    opacity: 0.7;
}

@media (max-width: 1024px) {
    .brand-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

    .brand-img {
        height: 220px;
    }

    .home-news-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

    .section-bg-en {
        font-size: 4rem;
        letter-spacing: 6px;
    }
}

@media (max-width: 768px) {
    .brand-grid {
        grid-template-columns: 1fr;
    }

    .brand-img {
        height: 200px;
    }

    .home-news-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .section-title-wrap {
        height: 80px;
        margin-bottom: 32px;
    }

    .section-bg-en {
        font-size: 2.8rem;
        letter-spacing: 4px;
    }

    .section-title-inner .section-title {
        font-size: 1.5rem;
        letter-spacing: 4px;
    }

    /* 关于我们全屏视差 - 移动端适配 */
    .intro-parallax-bg {
        background-attachment: scroll;
    }

    .intro-parallax-title h2 {
        font-size: 1.6rem;
        letter-spacing: 2px;
    }

    .intro-parallax-desc p {
        font-size: 0.9rem;
    }

    .intro-parallax-stats {
        flex-wrap: wrap;
        gap: 0;
    }

    .intro-stat-item {
        width: 50%;
        padding: 20px 12px;
    }

    .intro-stat-item:nth-child(2)::after {
        display: none;
    }

    .intro-stat-num {
        font-size: 2rem;
    }

    .intro-more-btn {
        width: 170px;
        height: 46px;
        font-size: 0.85rem;
    }
}

/* ============ 解决方案列表页（卡片） ============ */
.solutions-page-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.solutions-page-card {
    display: block;
    position: relative;
    overflow: hidden;
    aspect-ratio: 4/3;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition);
}

.solutions-page-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 40px rgba(0,0,0,0.1);
}

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

.solutions-page-card-img {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    transition: transform 0.6s ease;
}

.solutions-page-card-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.88) 0%, rgba(0,0,0,0.5) 55%, rgba(0,0,0,0.15) 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 32px;
    color: #fff;
}

.solutions-page-card-en {
    font-size: 0.72rem;
    letter-spacing: 3px;
    opacity: 0.6;
    margin-bottom: 8px;
    text-transform: uppercase;
}

.solutions-page-card-overlay h3 {
    font-size: 1.3rem;
    font-weight: 500;
    letter-spacing: 2px;
    margin-bottom: 10px;
}

.solutions-page-card-summary {
    font-size: 0.88rem;
    line-height: 1.6;
    opacity: 0.8;
    margin-bottom: 16px;
}

.solutions-page-card-link {
    font-size: 0.85rem;
    letter-spacing: 1px;
    opacity: 0.9;
    transition: opacity var(--transition);
}

.solutions-page-card:hover .solutions-page-card-link {
    opacity: 1;
}

/* ============ 解决方案独立详情页 ============ */
.solution-detail-page {
    max-width: 1100px;
    margin: 0 auto;
}

.solution-detail-hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: center;
    margin-bottom: 64px;
}

.solution-detail-hero-img {
    width: 100%;
    aspect-ratio: 4/3;
    background-size: cover;
    background-position: center;
}

.solution-detail-hero-content {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.solution-detail-hero-content .solution-detail-en {
    font-size: 0.78rem;
    color: var(--text-lighter);
    letter-spacing: 4px;
    margin-bottom: 0;
    font-family: 'Georgia', 'Times New Roman', serif;
}

.solution-detail-hero-content h1 {
    font-size: 2rem;
    font-weight: 500;
    color: var(--primary);
    letter-spacing: 3px;
    line-height: 1.3;
}

.solution-detail-hero-content .solution-detail-summary {
    font-size: 0.95rem;
    color: var(--text-light);
    line-height: 1.85;
    margin-bottom: 8px;
}

.solution-detail-section {
    margin-bottom: 56px;
}

.solution-detail-section h2 {
    font-size: 1.4rem;
    font-weight: 500;
    color: var(--primary);
    letter-spacing: 3px;
    margin-bottom: 28px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}

.solution-detail-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.solution-feature-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 20px;
    border: 1px solid var(--border);
    font-size: 0.92rem;
    color: var(--text);
    transition: border-color var(--transition);
}

.solution-feature-item:hover {
    border-color: var(--primary);
}

.solution-feature-icon {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    color: #fff;
    font-size: 0.8rem;
    font-weight: 700;
}

.solution-products-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.solution-product-tag {
    display: inline-block;
    padding: 10px 24px;
    border: 1px solid var(--border);
    font-size: 0.9rem;
    color: var(--text);
    transition: all var(--transition);
}

.solution-product-tag:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.solution-cases-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0;
}

.solution-cases-list li {
    font-size: 0.92rem;
    color: var(--text);
    padding: 18px 0;
    border-bottom: 1px solid var(--border);
    position: relative;
    padding-left: 20px;
}

.solution-cases-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    background: var(--primary);
}

.solution-detail-nav {
    display: flex;
    justify-content: space-between;
    padding-top: 32px;
    border-top: 1px solid var(--border);
    margin-top: 32px;
}

/* ============ 品牌卡片页（产品中心） ============ */
.page-body .brand-grid {
    margin-top: 0;
}

/* ============ 新闻卡片网格 ============ */
.news-card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.news-card-item {
    display: block;
    background: var(--bg);
    border: 1px solid var(--border);
    transition: border-color var(--transition), box-shadow var(--transition);
    overflow: hidden;
}

.news-card-item:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
}

.news-card-img {
    width: 100%;
    height: 200px;
    background-size: cover;
    background-position: center;
}

.news-card-body {
    padding: 20px 22px 24px;
}

.news-card-body .top-tag {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    font-size: 0.7rem;
    padding: 2px 8px;
    margin-right: 8px;
    letter-spacing: 1px;
}

.news-card-body .news-cat-tag {
    font-size: 0.72rem;
    color: var(--text-lighter);
    letter-spacing: 1px;
}

.news-card-body h3 {
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--primary);
    margin: 10px 0 8px;
    line-height: 1.5;
    letter-spacing: 1px;
}

.news-card-summary {
    font-size: 0.85rem;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 12px;
}

.news-card-body .news-date {
    font-size: 0.78rem;
    color: var(--text-lighter);
}

@media (max-width: 1024px) {
    .news-card-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

    .solutions-page-grid {
        grid-template-columns: 1fr;
    }

    .solution-detail-hero {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .solution-detail-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .news-card-grid {
        grid-template-columns: 1fr;
    }

    .news-card-img {
        height: 180px;
    }

    .solutions-page-card-overlay {
        padding: 20px;
    }

    .solutions-page-card-overlay h3 {
        font-size: 1.1rem;
    }

    .solution-detail-hero-content h1 {
        font-size: 1.5rem;
    }

    .solution-detail-nav {
        flex-direction: column;
        gap: 16px;
    }

    .solution-detail-nav .btn {
        width: 100%;
        text-align: center;
    }

    .back-to-top {
        width: 40px;
        height: 40px;
        bottom: 24px;
        right: 16px;
        border-radius: 4px;
    }
}

/* ============ 返回顶部按钮 ============ */
.back-to-top {
    position: fixed;
    bottom: 40px;
    right: 28px;
    z-index: 998;
    width: 48px;
    height: 48px;
    border-radius: 6px;
    background: #111;
    color: #fff;
    border: 1px solid #111;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease, background 0.3s ease, color 0.3s ease, border-color 0.3s ease;
    box-shadow: 0 2px 12px rgba(0,0,0,0.15);
}

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

.back-to-top:hover {
    background: #fff;
    color: #111;
    border-color: #111;
}

/* ============ Logo文字 ============ */
.logo-text {
    font-size: 1.4rem;
    font-weight: 600;
    letter-spacing: 2px;
    color: #fff;
    margin-left: 10px;
    line-height: 1;
    transform: translateY(-3px);
}

.header.scrolled .logo-text {
    color: var(--primary);
}

/* ============ 中等屏幕适配（1025px ~ 1366px） ============ */
@media (max-width: 1366px) and (min-width: 1025px) {
    .nav {
        justify-content: flex-end;
    }
    .nav > a,
    .nav-dropdown > a {
        padding: 10px 12px;
        letter-spacing: 1px;
    }
}

@media (max-width: 1200px) and (min-width: 1025px) {
    .nav > a,
    .nav-dropdown > a {
        padding: 10px 6px;
        letter-spacing: 0.5px;
        font-size: 1rem;
    }
}

/* ============ 移动端导航遮罩层 ============ */
.nav-overlay {
    display: none;
}

@media (max-width: 1024px) {
    .nav-overlay {
        display: block;
        position: fixed;
        top: 76px;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0,0,0,0.4);
        z-index: 998;
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.3s ease, visibility 0.3s ease;
    }

    .nav-overlay.active {
        opacity: 1;
        visibility: visible;
    }

    .nav-toggle {
        z-index: 1001;
    }
}

@media (max-width: 768px) {
    .nav-toggle span {
        width: 22px;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    /* 导航菜单滑动优化 */
    .nav {
        top: 60px;
        z-index: 999;
        -webkit-overflow-scrolling: touch;
    }

    /* 首页轮播箭头移动端优化 */
    .banner-arrow {
        width: 36px;
        height: 36px;
        opacity: 0.7;
    }

    .banner-arrow svg {
        width: 22px;
        height: 22px;
    }

    .section-banner:hover .banner-arrow {
        opacity: 0.7;
    }

    /* 轮播文字条移动端优化 */
    .banner-text-bar {
        padding: 16px 0;
    }

    .banner-text-inner {
        padding: 0 20px;
    }

    /* 首页区块间距优化 */
    .section-intro,
    .section-brands,
    .section-solutions,
    .section-news {
        padding: 48px 0;
    }

    /* 品牌卡片移动端优化 */
    .brand-card {
        display: flex;
        flex-direction: row;
        align-items: stretch;
    }

    .brand-img {
        width: 120px;
        min-width: 120px;
        height: auto;
        padding: 20px;
    }

    .brand-img img {
        max-width: 100%;
        max-height: 80px;
    }

    .brand-content {
        padding: 20px 16px;
        flex: 1;
    }

    .brand-name {
        font-size: 1.1rem;
    }

    .brand-desc {
        font-size: 0.82rem;
        -webkit-line-clamp: 2;
        display: -webkit-box;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .brand-link {
        font-size: 0.8rem;
    }

    /* 案例赏析卡片移动端优化 */
    .news-card-item {
        flex-direction: row;
    }

    .news-card-img {
        width: 120px;
        min-width: 120px;
        height: 100%;
        min-height: 100px;
    }

    .news-card-body {
        padding: 14px 14px;
    }

    .news-card-body h3 {
        font-size: 0.95rem;
        -webkit-line-clamp: 2;
        display: -webkit-box;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .news-card-summary {
        font-size: 0.8rem;
        -webkit-line-clamp: 2;
        display: -webkit-box;
        -webkit-box-orient: vertical;
        overflow: hidden;
        margin-bottom: 8px;
    }

    /* 产品详情Hero移动端优化 */
    .project-detail-hero {
        margin: 24px 0;
        gap: 24px;
    }

    .project-detail-hero-content h1 {
        font-size: 1.3rem;
        letter-spacing: 1px;
    }

    .project-detail-hero-content .project-detail-summary {
        font-size: 0.88rem;
    }

    /* 文章详情页移动端优化 */
    .article-detail {
        margin-bottom: 24px;
    }

    .article-title {
        font-size: 1.25rem;
        letter-spacing: 1px;
        margin-bottom: 12px;
    }

    .article-meta {
        font-size: 0.78rem;
        gap: 8px;
        margin-bottom: 20px;
        padding-bottom: 12px;
    }

    .article-image {
        margin-bottom: 20px;
    }

    .article-body {
        font-size: 0.92rem;
        line-height: 1.85;
    }

    .article-body p {
        margin-bottom: 14px;
        text-indent: 2em;
    }

    .article-body img {
        max-width: 100%;
    }

    .article-body table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
        -webkit-overflow-scrolling: touch;
    }

    /* 产品规格表格移动端优化 */
    .project-detail-body .pd-specs-table {
        display: block;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .project-detail-body .pd-specs-table th,
    .project-detail-body .pd-specs-table td {
        font-size: 0.82rem;
        padding: 8px 10px;
    }

    /* 面包屑导航移动端优化 */
    .breadcrumb-in-topbar {
        font-size: 0.78rem;
    }

    .breadcrumb-in-topbar a {
        white-space: nowrap;
    }

    /* 分类导航标签移动端优化 */
    .topbar-tabs a {
        padding: 6px 12px;
        font-size: 0.82rem;
    }

    /* 分页移动端优化 */
    .pagination {
        gap: 3px;
        margin-top: 28px;
        flex-wrap: wrap;
        justify-content: center;
    }

    .page-btn {
        min-width: 34px;
        height: 34px;
        font-size: 0.78rem;
    }

    /* 页脚移动端优化 */
    .footer {
        padding: 40px 0 0;
    }

    .footer-grid {
        gap: 24px;
    }

    .footer-col h3 {
        font-size: 1rem;
        margin-bottom: 6px;
    }

    .footer-col h4 {
        font-size: 0.88rem;
        margin-bottom: 10px;
    }

    .footer-col a,
    .footer-col p {
        font-size: 0.8rem;
        line-height: 1.8;
    }

    .footer-bottom {
        padding: 14px 0;
        font-size: 0.76rem;
    }

    /* 搜索弹窗移动端优化 */
    .search-modal-content {
        margin-top: 0;
        height: 100vh;
    }

    .search-modal-header {
        padding: 12px 16px;
    }

    .search-input-wrapper input {
        padding: 10px 8px;
        font-size: 16px;
    }

    /* 触控目标优化 */
    .nav > a,
    .nav-dropdown > a {
        min-height: 48px;
        padding: 14px 20px;
    }

    .topbar-tabs a {
        min-height: 40px;
        display: flex;
        align-items: center;
    }

    /* 关于我们页面移动端优化 */
    .about-fp-inner {
        padding: 60px 16px 48px;
    }

    .culture-acc-item {
        min-height: 64px;
        padding: 18px 16px;
    }

    .culture-acc-item h3 {
        font-size: 1rem;
    }

    .culture-acc-item p {
        font-size: 0.85rem;
    }

    .history-dot {
        padding-top: 12px !important;
    }

    .history-dot:nth-child(2) { padding-top: 12px !important; }
    .history-dot:nth-child(3) { padding-top: 12px !important; }
    .history-dot:nth-child(4) { padding-top: 12px !important; }
    .history-dot:nth-child(5) { padding-top: 12px !important; }
    .history-dot:nth-child(6) { padding-top: 12px !important; }

    /* 服务与支持页面移动端优化 */
    .support-card {
        padding: 24px 16px 20px;
    }

    .support-item {
        padding: 20px 16px;
    }

    .support-section-title {
        font-size: 1.15rem;
    }
}

@media (max-width: 480px) {
    /* 品牌卡片小屏单列 */
    .brand-card {
        flex-direction: column;
    }

    .brand-img {
        width: 100%;
        min-width: 100%;
        height: 160px;
        padding: 28px;
    }

    .brand-img img {
        max-height: 100px;
    }

    /* 案例卡片小屏单列 */
    .news-card-item {
        flex-direction: column;
    }

    .news-card-img {
        width: 100%;
        min-width: 100%;
        height: 180px;
    }

    /* 轮播文字条小屏优化 */
    .banner-text-title {
        font-size: 1.1rem;
    }

    .banner-text-desc {
        font-size: 0.75rem;
        line-height: 1.5;
    }

    /* 产品详情Hero小屏优化 */
    .project-detail-hero {
        margin: 16px 0;
    }

    .project-detail-hero-content h1 {
        font-size: 1.15rem;
    }

    /* 文章标题小屏优化 */
    .article-title {
        font-size: 1.1rem;
    }

    /* 关于我们统计数字小屏优化 */
    .intro-stat-item {
        width: 50%;
        padding: 16px 8px;
    }

    .intro-stat-num {
        font-size: 1.6rem;
    }

    .intro-stat-label {
        font-size: 0.72rem;
    }

    /* 页脚ICP信息小屏换行 */
    .footer-bottom p {
        line-height: 1.8;
    }

    .footer-bottom span {
        display: block;
        margin-left: 0 !important;
        margin-top: 4px;
    }
}

/* ============ 触摸设备优化 ============ */
@media (hover: none) and (pointer: coarse) {
    .banner-arrow {
        opacity: 0.6;
    }

    .section-banner:hover .banner-arrow {
        opacity: 0.6;
    }

    .banner-arrow:hover {
        background: rgba(0,0,0,0.35);
    }

    .brand-card:hover {
        transform: none;
        box-shadow: none;
    }

    .news-card-item:hover {
        transform: none;
        box-shadow: none;
    }

    .solutions-card:hover {
        transform: none;
    }

    .solutions-card:hover .solutions-img {
        transform: none;
    }
}

/* ============ Language Toggle Button ============ */
.lang-toggle {
    background: none;
    border: 1px solid currentColor;
    border-radius: 4px;
    padding: 4px 8px;
    cursor: pointer;
    color: #fff;
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
    transition: color var(--transition), border-color var(--transition), opacity 0.2s;
    opacity: 0.85;
}
.lang-toggle:hover { opacity: 1; }
.header.scrolled .lang-toggle {
    color: var(--text);
}
.header.scrolled .lang-toggle:hover {
    color: var(--primary);
}
.lang-toggle-text { font-size: 0.75rem; }
.header-actions { display: flex; align-items: center; gap: 10px; }