/* =====================================================
   仙人湾照明 · 视觉风格参考 nvc-lighting.com.cn（雷士照明）
   设计母题：绿色主色 / 斜切平行四边形 / 竖线纹理 /
            极细-极粗字重对比 / 斜线分隔 / 深浅区块交替
   ===================================================== */

:root {
    --green: #008755;
    --green-bright: #26D07C;
    --green-tint: rgba(0, 135, 85, 0.08);
    --ink: #1A1A14;          /* 近黑暖调 */
    --ink-2: #22221B;
    --light: #F5F7F8;
    --sky: #EAF2F6;
    --text: #333;
    --text-dim: rgba(0, 0, 0, 0.7);
    --white-dim: rgba(255, 255, 255, 0.5);
}

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

html { scroll-behavior: smooth; scroll-padding-top: 64px; }

/* 防 FOUC：非中文浏览器先隐藏 body，等 i18n 应用完再渐显 */
html.i18n-pending body { opacity: 0; }
html.i18n-ready body { opacity: 1; transition: opacity .18s ease; }

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: var(--text);
    line-height: 1.6;
    background: #fff;
    -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; background: none; border: none; cursor: pointer; color: inherit; }

/* 竖线纹理（浅色区背景装饰） */
.vline-texture {
    background-image: repeating-linear-gradient(90deg,
        rgba(0, 135, 85, 0.10) 0, rgba(0, 135, 85, 0.10) 1px,
        transparent 1px, transparent 7px);
}

/* ============ 顶部导航（恒透明 + 白字） ============ */
.site-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    height: 64px;
    padding: 0 33px 0 33px;
    background: transparent;
    transition: background .35s ease;
}
/* 滚动到浅色区后加白底，保证可读性 */
.site-header.solid {
    background: rgba(255, 255, 255, 0.96);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06);
}
.site-header.solid .nav-list a,
.site-header.solid .logo { color: var(--ink); }
.site-header.solid .logo .logo-suffix { color: var(--green); }
.site-header.solid .nav-list li.on a { color: var(--green); }

.header-left { flex: 0 0 auto; }
.logo {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: 1px;
    color: #fff;
    display: inline-flex;
    align-items: center;
    gap: 10px;
}
/* 圆形裁切去掉浅色四角，只留地球徽章 */
.logo img {
    width: 40px; height: 40px;
    border-radius: 50%;
    object-fit: cover;
}
.logo .logo-name { color: inherit; font-weight: inherit; letter-spacing: inherit; }
.logo .logo-suffix { color: var(--green-bright); font-weight: 500; }

.main-nav { flex: 1 1 auto; display: flex; justify-content: center; }
.nav-list { display: flex; gap: 34px; }
.nav-list a {
    position: relative;
    font-size: 14px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.85);
    letter-spacing: 1px;
    padding: 6px 0;
    transition: color .3s;
}
.nav-list a:hover { color: #fff; }
.nav-list li.on a { color: #fff; }
.nav-list a::after {
    content: '';
    position: absolute;
    left: 50%; bottom: -2px;
    width: 0; height: 2px;
    background: var(--green-bright);
    transform: translateX(-50%);
    transition: width .3s;
}
.nav-list a:hover::after,
.nav-list li.on a::after { width: 100%; }

.header-right { flex: 0 0 auto; display: flex; align-items: center; gap: 14px; }

/* 中/EN 语言切换按钮 */
.lang-switch {
    display: inline-flex;
    align-items: center;
    gap: 3px;
    color: rgba(255, 255, 255, .85);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 1px;
    line-height: 1;
    -webkit-user-select: none;
    user-select: none;
}
.lang-switch .lang-btn {
    padding: 5px 4px;
    color: inherit;
    font: inherit;
    line-height: 1;
    opacity: .45;
    transition: opacity .3s, color .3s;
}
.lang-switch .lang-btn:hover { opacity: .85; }
.lang-switch .lang-btn.active { opacity: 1; color: var(--green-bright); }
.lang-switch .lang-sep { opacity: .3; font-weight: 300; font-size: 11px; }
.site-header.solid .lang-switch { color: var(--ink); }
.site-header.solid .lang-switch .lang-btn.active { color: var(--green); }

/* 斜切平行四边形搜索按钮 */
.search-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px; height: 64px;
    margin-right: -33px;
    background: #fff;
    color: var(--green);
    clip-path: polygon(28% 0, 100% 0, 100% 100%, 0 100%);
    transition: background .3s, color .3s;
}
.search-btn svg { width: 22px; height: 22px; }
.search-btn:hover { background: var(--green); color: #fff; }
/* 浅色区白底时搜索按钮反转为绿底，避免隐形 */
.site-header.solid .search-btn { background: var(--green); color: #fff; }

/* ============ Hero 全屏轮播 ============ */
.hero {
    position: relative;
    height: 100vh;
    min-height: 620px;
    overflow: hidden;
    background: var(--ink);
}
.hero-slides, .hero-slide { position: absolute; inset: 0; }
.hero-slide {
    background-size: cover;
    background-position: center;
    opacity: 0;
    transform: scale(1.06);
    transition: opacity 1.2s ease, transform 6s linear;
}
.hero-slide.active { opacity: 1; transform: scale(1); }
/* 暗遮罩保证白字可读 */
.hero::before {
    content: '';
    position: absolute; inset: 0;
    background: linear-gradient(180deg, rgba(0,0,0,.25), rgba(0,0,0,.05) 40%, rgba(0,0,0,.35));
    z-index: 1;
}
.hero-content {
    position: relative;
    z-index: 3;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}
.hero-content h1 {
    color: #fff;
    font-size: 56px;
    font-weight: 700;
    letter-spacing: 6px;
    text-shadow: 0 2px 24px rgba(0, 0, 0, .45);
}
/* 左下数字指示器 */
.hero-indicator {
    position: absolute;
    left: 40px; bottom: 64px;
    z-index: 4;
    display: flex;
    gap: 22px;
}
.hero-indicator .hi {
    position: relative;
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    padding: 6px 4px;
    opacity: .8;
    transition: color .3s, opacity .3s;
}
.hero-indicator .hi.active { color: var(--green-bright); opacity: 1; }
.hero-indicator .hi.active::before {
    content: '';
    position: absolute;
    left: -8px; top: 0;
    width: 26px; height: 26px;
    border: 1px solid var(--green-bright);
    clip-path: polygon(0 0, 100% 12%, 78% 100%, 8% 82%);
    z-index: -1;
}
.hero-copyright {
    position: absolute;
    left: 40px; bottom: 18px;
    z-index: 4;
    color: rgba(255, 255, 255, .55);
    font-size: 11px;
    line-height: 1.7;
    letter-spacing: .5px;
}

/* ============ 关于（深色 左文右斜切图） ============ */
.about { background: var(--ink); color: #fff; padding: 110px 0; overflow: hidden; }
.about-inner {
    max-width: 1240px; margin: 0 auto; padding: 0 40px;
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 60px;
    align-items: center;
}
.about-label { color: var(--green-bright); font-size: 15px; font-weight: 600; letter-spacing: 1px; }
.about-title {
    margin: 18px 0 26px;
    display: flex; align-items: baseline; gap: 14px;
    line-height: 1;
}
.about-title b { font-size: 52px; font-weight: 800; letter-spacing: 2px; color: #fff; }
.about-title i { font-style: normal; font-size: 52px; font-weight: 200; letter-spacing: 4px; color: var(--green-bright); }
.about-text p {
    color: rgba(255, 255, 255, .62);
    font-size: 14px;
    line-height: 2;
    text-align: justify;
}
.about-text p b { color: var(--green-bright); font-weight: 700; }
.more-link {
    display: inline-block;
    margin-top: 34px;
    color: var(--green-bright);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 2px;
    transition: color .3s;
}
.more-link:hover { color: #fff; }
/* 右侧斜切图 */
.about-media { position: relative; }
.skew-img {
    clip-path: polygon(12% 0, 100% 0, 88% 100%, 0 100%);
    overflow: hidden;
}
.skew-img img { width: 100%; height: 460px; object-fit: cover; }

/* ============ 使命（全屏图） ============ */
.mission {
    position: relative;
    min-height: 88vh;
    background-size: cover;
    background-position: center;
    background-color: var(--ink-2);
    display: flex;
    align-items: center;
    overflow: hidden;
}
.mission::before {
    content: '';
    position: absolute; inset: 0;
    background: linear-gradient(100deg, rgba(20,20,16,.55), rgba(0,135,85,.18));
}
.mission-inner {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 1240px; margin: 0 auto; padding: 0 40px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}
.mission-en { display: flex; flex-direction: column; line-height: 1.05; color: #fff; }
.mission-en .thin { font-size: 62px; font-weight: 200; letter-spacing: 6px; }
.mission-en .bold { font-size: 62px; font-weight: 800; letter-spacing: 2px; }
.mission-cn { text-align: left; }
.mission-cn h3 { color: var(--green-bright); font-size: 52px; font-weight: 600; letter-spacing: 2px; margin-bottom: 16px; white-space: nowrap; }
.mission-cn p { color: rgba(255, 255, 255, .85); font-size: 28px; letter-spacing: 1px; white-space: nowrap; }

/* ============ 产品中心（浅色天空 + icon tab） ============ */
.products {
    position: relative;
    padding: 90px 0 60px;
    background: linear-gradient(180deg, #fff 0%, var(--sky) 30%, var(--light) 100%);
    overflow: hidden;
}
.products-head {
    max-width: 1240px; margin: 0 auto 30px; padding: 0 40px;
    display: flex; align-items: baseline; gap: 14px;
}
.products-head h2 { color: var(--green); font-size: 40px; font-weight: 700; letter-spacing: 2px; }
.products-head span { color: var(--green); font-size: 16px; font-weight: 400; letter-spacing: 1px; }

.product-stage {
    max-width: 1000px;
    height: 420px;
    margin: 0 auto;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center bottom;
    transition: background-image .4s ease;
    /* 边缘渐隐，弱化硬边矩形感 */
    -webkit-mask-image: radial-gradient(ellipse at center, #000 55%, transparent 98%);
    mask-image: radial-gradient(ellipse at center, #000 55%, transparent 98%);
}

.product-tabs { position: relative; max-width: 1000px; margin: 0 auto; padding: 0 20px; }
/* 白色圆角气泡（子分类） */
.tab-bubble {
    position: relative;
    display: flex;
    justify-content: center;
    min-height: 46px;
    margin-bottom: 26px;
}
.bubble-list {
    display: none;
    align-items: center;
    gap: 26px;
    background: #fff;
    border-radius: 8px;
    padding: 12px 26px;
    box-shadow: 0 6px 22px rgba(0, 60, 40, .08);
}
.bubble-list.active { display: flex; }
.bubble-list li { color: #666; font-size: 13px; cursor: pointer; transition: color .3s; }
.bubble-list li:hover { color: var(--green); }
.bubble-list::after {
    content: '';
    position: absolute;
    left: 50%; bottom: -7px;
    transform: translateX(-50%);
    width: 14px; height: 8px;
    background: #fff;
    clip-path: polygon(0 0, 100% 0, 50% 100%);
}
/* icon tab 行 */
.tab-icons { display: flex; justify-content: center; gap: 90px; }
.tab-icon {
    position: relative;
    display: flex; flex-direction: column; align-items: center; gap: 10px;
    color: #666;
    cursor: pointer;
    transition: color .3s;
    padding-bottom: 14px;
}
.tab-icon svg { width: 30px; height: 30px; }
.tab-icon span { font-size: 14px; letter-spacing: 1px; }
.tab-icon.active { color: var(--green); font-weight: 700; }
/* 激活 tab 下方淡绿光束三角 */
.tab-icon.active::after {
    content: '';
    position: absolute;
    left: 50%; bottom: -34px;
    transform: translateX(-50%);
    width: 120px; height: 60px;
    background: linear-gradient(180deg, var(--green-tint), transparent);
    clip-path: polygon(38% 0, 62% 0, 100% 100%, 0 100%);
}

/* ============ 照明方案（5 卡片） ============ */
.solutions { background: #fff; padding: 20px 0 90px; }
.solutions-grid {
    max-width: 1240px; margin: 0 auto; padding: 0 40px;
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
}
.solution-card {
    position: relative;
    height: 380px;
    background-size: cover;
    background-position: center;
    background-color: var(--ink-2);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 24px 20px;
    color: #fff;
    isolation: isolate;
    transition: transform .4s ease;
}
.solution-card::before {
    content: '';
    position: absolute; inset: 0;
    background: linear-gradient(180deg, transparent 30%, rgba(0, 40, 26, .82));
    z-index: -1;
    transition: background .4s;
}
.solution-card:hover { transform: translateY(-6px); }
.solution-card h3 { font-size: 22px; font-weight: 700; letter-spacing: 2px; }
.solution-card > span { display: block; color: var(--green-bright); font-size: 12px; letter-spacing: 1px; margin: 4px 0 12px; }
.solution-card p {
    color: rgba(255, 255, 255, .8);
    font-size: 12px; line-height: 1.8;
    max-height: 0; opacity: 0; overflow: hidden;
    transition: max-height .4s ease, opacity .4s ease;
}
.solution-card:hover p { max-height: 120px; opacity: 1; }
.solution-card em {
    font-style: normal;
    margin-top: 14px;
    color: var(--green-bright);
    font-size: 12px; font-weight: 700; letter-spacing: 2px;
}

/* ============ 工程案例（深色全屏轮播） ============ */
.cases {
    position: relative;
    height: 92vh;
    min-height: 560px;
    overflow: hidden;
    background: #000;
    color: #fff;
}
.case-slides, .case-slide { position: absolute; inset: 0; }
.case-slide {
    background-size: cover;
    /* 案例图多为竖构图，定位偏上以保留灯头主体 */
    background-position: center 30%;
    opacity: 0;
    transition: opacity 1s ease;
}
.case-slide.active { opacity: 1; }
.cases::before {
    content: '';
    position: absolute; inset: 0;
    background: linear-gradient(90deg, rgba(0,0,0,.55), transparent 55%);
    z-index: 1;
}
/* 绿色斜切点缀（已禁用） */
.case-skew {
    display: none;
}
.case-caption {
    position: absolute;
    left: 60px; bottom: 60px;
    z-index: 3;
    display: flex; align-items: center; gap: 22px;
}
.case-word { font-size: 64px; font-weight: 800; letter-spacing: 2px; line-height: 1; }
.case-slash { font-size: 44px; font-weight: 200; color: rgba(255,255,255,.6); transform: rotate(12deg); }
.case-meta .case-year { display: block; color: rgba(255,255,255,.75); font-size: 14px; letter-spacing: 1px; }
.case-meta h3 { font-size: 22px; font-weight: 600; letter-spacing: 1px; margin-top: 4px; }

.case-arrow {
    position: absolute;
    top: 50%; transform: translateY(-50%);
    z-index: 4;
    width: 56px; height: 60px;
    color: #fff;
    opacity: .85;
    transition: opacity .3s, color .3s;
}
.case-arrow:hover { opacity: 1; color: var(--green-bright); }
.case-arrow svg { width: 100%; height: 100%; }
.case-arrow.prev { left: 40px; }
.case-arrow.next { right: 40px; }

.case-counter {
    position: absolute;
    right: 60px; bottom: 60px;
    z-index: 3;
    display: flex; flex-direction: column; align-items: center;
    line-height: 1.2;
}
.case-counter .cur { font-size: 26px; font-weight: 800; }
.case-counter .sep { color: rgba(255,255,255,.5); font-weight: 200; }
.case-counter .tot { color: rgba(255,255,255,.5); font-size: 15px; }

/* ============ 新闻动态（浅色 + 竖线纹理 + 三卡） ============ */
.news {
    position: relative;
    padding: 90px 0 70px;
    background: var(--light);
    overflow: hidden;
}
/* 中部淡绿竖线纹理 */
.news::before {
    content: '';
    position: absolute;
    left: 50%; top: 0; bottom: 0;
    width: 520px;
    transform: translateX(-50%);
    background-image: repeating-linear-gradient(90deg,
        rgba(0, 135, 85, 0.14) 0, rgba(0, 135, 85, 0.14) 1px,
        transparent 1px, transparent 6px);
    -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
    mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
}
.news-carousel {
    position: relative;
    height: 300px;
    max-width: 1100px;
    margin: 0 auto 40px;
}
.news-card {
    position: absolute;
    top: 50%; left: 50%;
    width: 340px; height: 230px;
    background-size: cover;
    background-position: center;
    background-color: #ccc;
    border-radius: 4px;
    overflow: hidden;
    color: #fff;
    opacity: 0;
    pointer-events: none;
    transform: translate(-50%, -50%) scale(.72);
    transition: transform .5s ease, opacity .5s ease;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
}
.news-card::before {
    content: '';
    position: absolute; inset: 0;
    background: linear-gradient(180deg, transparent 45%, rgba(0,0,0,.72));
}
.news-card .news-date { position: absolute; top: 12px; right: 14px; font-size: 12px; color: rgba(255,255,255,.9); z-index: 1; }
.news-card h3 { position: relative; z-index: 1; padding: 14px 16px; font-size: 14px; font-weight: 600; line-height: 1.6; }
/* 三卡位置：左 / 中(放大) / 右 */
.news-card.pos-left  { opacity: .85; pointer-events: auto; transform: translate(-118%, -58%) scale(.78); }
.news-card.pos-center{ opacity: 1;  pointer-events: auto; transform: translate(-50%, -50%) scale(1); z-index: 2; }
.news-card.pos-right { opacity: .85; pointer-events: auto; transform: translate(18%, -42%) scale(.78); }

.news-head {
    position: relative;
    max-width: 1240px; margin: 0 auto; padding: 0 40px;
    display: flex; align-items: center; justify-content: space-between;
}
.news-title { display: flex; align-items: center; gap: 20px; }
.news-en { color: var(--green); font-size: 48px; font-weight: 800; letter-spacing: 2px; line-height: 1; }
.news-slash { color: rgba(0, 135, 85, .5); font-size: 40px; font-weight: 200; transform: rotate(12deg); }
.news-cn { color: var(--green); font-size: 24px; font-weight: 500; letter-spacing: 2px; }
.news-arrows { display: flex; gap: 18px; }
.news-arrow { width: 44px; height: 48px; color: var(--green); opacity: .8; transition: opacity .3s; }
.news-arrow:hover { opacity: 1; }
.news-arrow svg { width: 100%; height: 100%; }

/* ============ 页脚（深绿渐变 + 斜纹） ============ */
.footer {
    position: relative;
    color: #fff;
    padding: 70px 0 0;
    background:
        repeating-linear-gradient(115deg,
            rgba(255, 255, 255, 0.03) 0, rgba(255, 255, 255, 0.03) 2px,
            transparent 2px, transparent 14px),
        linear-gradient(120deg, #022B1C 0%, #064E3B 60%, #04382A 100%);
    overflow: hidden;
}
/* 右侧亮绿斜切光束 */
.footer::after {
    content: '';
    position: absolute;
    right: -6%; top: -20%;
    width: 30%; height: 150%;
    background: linear-gradient(200deg, rgba(38, 208, 124, .35), transparent 70%);
    clip-path: polygon(40% 0, 100% 0, 60% 100%, 0 100%);
    pointer-events: none;
}
.footer-brand { text-align: center; position: relative; z-index: 1; }
.footer-logo {
    font-size: 40px; font-weight: 800; letter-spacing: 4px;
    display: flex; align-items: center; justify-content: center; gap: 18px;
}
.footer-logo img {
    width: 62px; height: 62px;
    border-radius: 50%;
    object-fit: cover;
}
.footer-slogan { margin-top: 12px; color: rgba(255, 255, 255, .85); font-size: 14px; letter-spacing: 4px; }

.footer-cols {
    position: relative; z-index: 1;
    max-width: 1240px; margin: 56px auto 0; padding: 0 40px;
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 26px;
}
.footer-col h4 {
    color: var(--white-dim);
    font-size: 13px; font-weight: 500; letter-spacing: 1px;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(255, 255, 255, .25);
    margin-bottom: 14px;
}
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { color: rgba(255, 255, 255, .7); font-size: 13px; transition: color .3s; }
.footer-col ul li a:hover { color: #fff; }
.footer-contact p { color: rgba(255, 255, 255, .7); font-size: 12px; margin-bottom: 6px; }

.footer-bar {
    position: relative; z-index: 1;
    margin-top: 50px;
    padding: 18px 40px;
    background: rgba(0, 0, 0, .28);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    font-size: 12px;
    color: rgba(255, 255, 255, .8);
}
.fb-left { line-height: 1.7; }
.fb-mid { display: flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 700; }
.fb-mid svg { width: 18px; height: 18px; color: var(--green-bright); }
.fb-right { display: flex; gap: 22px; }
.fb-right a { color: rgba(255, 255, 255, .8); transition: color .3s; }
.fb-right a:hover { color: var(--green-bright); }
.back-top { color: var(--green-bright); font-size: 12px; font-weight: 700; letter-spacing: 1px; }

/* ============ 英文模式适配（html[lang="en-US"]） ============ */
/* 英文单词更长，需要适度缩字 / 取消 nowrap / 调整 letter-spacing */
html[lang="en-US"] body { font-family: "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif; }

/* Logo：英文较长，适当缩小 */
html[lang="en-US"] .logo { font-size: 20px; letter-spacing: .5px; }

/* 导航：英文标签使用较紧的字间距 */
html[lang="en-US"] .nav-list { gap: 28px; }
html[lang="en-US"] .nav-list a { letter-spacing: .5px; }

/* Hero 主标题 */
html[lang="en-US"] .hero-content h1 { font-size: 46px; letter-spacing: 3px; }

/* 关于标题：英文较长 */
html[lang="en-US"] .about-title b,
html[lang="en-US"] .about-title i { font-size: 40px; letter-spacing: 1px; }
html[lang="en-US"] .about-title i { letter-spacing: 3px; }

/* 使命中文区：允许换行 + 缩小字号 */
html[lang="en-US"] .mission-cn h3 {
    font-size: 34px;
    letter-spacing: .5px;
    line-height: 1.25;
    white-space: normal;
}
html[lang="en-US"] .mission-cn p {
    font-size: 20px;
    letter-spacing: .3px;
    line-height: 1.5;
    white-space: normal;
}

/* 产品中心标题 */
html[lang="en-US"] .products-head h2 { font-size: 34px; }

/* 产品 tab 图标：英文标签较长 */
html[lang="en-US"] .tab-icons { gap: 60px; }
html[lang="en-US"] .tab-icon span { font-size: 13px; letter-spacing: .3px; text-align: center; }

/* 方案卡片标题：英文可能较长 */
html[lang="en-US"] .solution-card h3 { font-size: 18px; letter-spacing: .5px; line-height: 1.3; }
html[lang="en-US"] .solution-card > span { font-size: 11px; }

/* 工程案例标题 */
html[lang="en-US"] .case-meta h3 { font-size: 20px; letter-spacing: .3px; }

/* 新闻 */
html[lang="en-US"] .news-cn { font-size: 20px; letter-spacing: 1px; }
html[lang="en-US"] .news-card h3 { font-size: 13px; line-height: 1.5; }

/* 页脚 */
html[lang="en-US"] .footer-logo { font-size: 32px; letter-spacing: 2px; }
html[lang="en-US"] .footer-slogan { font-size: 13px; letter-spacing: 2px; }
html[lang="en-US"] .footer-col ul li a { font-size: 12px; }
html[lang="en-US"] .fb-left { font-size: 11px; line-height: 1.6; }

/* ============ 响应式 ============ */
@media (max-width: 1100px) {
    .solutions-grid { grid-template-columns: repeat(3, 1fr); }
    .footer-cols { grid-template-columns: repeat(3, 1fr); }
    .tab-icons { gap: 50px; }
}
@media (max-width: 900px) {
    .main-nav { display: none; }
    .about-inner { grid-template-columns: 1fr; }
    .skew-img img { height: 320px; }
    .mission-inner { grid-template-columns: 1fr; gap: 20px; }
    .mission-en .thin, .mission-en .bold { font-size: 44px; }
    .hero-content h1 { font-size: 38px; letter-spacing: 3px; }
    .solutions-grid { grid-template-columns: repeat(2, 1fr); }
    .case-word { font-size: 44px; }
    .case-arrow.prev { left: 10px; }
    .case-arrow.next { right: 10px; }
    .news-card { width: 280px; height: 190px; }
    .footer-cols { grid-template-columns: repeat(2, 1fr); }
    .footer-bar { flex-wrap: wrap; }
}
@media (max-width: 600px) {
    .hero-content h1 { font-size: 26px; letter-spacing: 2px; }
    .about-title b, .about-title i { font-size: 34px; }
    .products-head h2 { font-size: 30px; }
    .product-stage { height: 260px; }
    .tab-icons { gap: 22px; flex-wrap: wrap; }
    .solutions-grid { grid-template-columns: 1fr; }
    .solution-card { height: 260px; }
    .news-en { font-size: 34px; }
    .news-cn { font-size: 18px; }
    .case-caption { left: 24px; bottom: 40px; }
    .case-counter { right: 24px; bottom: 40px; }
}

/* ===== 无障碍 / SEO：仅屏幕阅读器与爬虫可见的标题 ===== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    clip-path: inset(50%);
    white-space: nowrap;
    border: 0;
}

/* =====================================================
   多页面拆分后新增组件
   - page-hero：子页顶部横幅
   - quick-entries：首页 3 入口卡片
   - products-page / product-panels / product-card：产品页 tab + 网格
   - solutions-page / solution-card-page：方案页网格
   - cases-page / case-card：案例页网格
   ===================================================== */

/* ---------- 子页顶部横幅 ---------- */
.page-hero {
    position: relative;
    padding: 150px 0 70px;
    background:
        linear-gradient(120deg, rgba(2, 43, 28, .92) 0%, rgba(6, 78, 59, .82) 55%, rgba(0, 135, 85, .7) 100%),
        url('../img/mission/mission.png') center/cover no-repeat;
    color: #fff;
    overflow: hidden;
}
.page-hero::after {
    content: '';
    position: absolute;
    right: -8%; top: -30%;
    width: 34%; height: 160%;
    background: linear-gradient(200deg, rgba(38, 208, 124, .28), transparent 70%);
    clip-path: polygon(40% 0, 100% 0, 60% 100%, 0 100%);
    pointer-events: none;
}
.page-hero-inner {
    position: relative;
    z-index: 1;
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 40px;
}
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: rgba(255, 255, 255, .7);
    letter-spacing: 1px;
    margin-bottom: 22px;
}
.breadcrumb a { color: rgba(255, 255, 255, .8); transition: color .3s; }
.breadcrumb a:hover { color: var(--green-bright); }
.breadcrumb .sep { color: rgba(255, 255, 255, .4); }
.breadcrumb .current { color: var(--green-bright); font-weight: 600; }
.page-title {
    display: flex;
    align-items: baseline;
    gap: 18px;
    line-height: 1.1;
    margin-bottom: 18px;
    flex-wrap: wrap;
}
.page-title b {
    font-size: 46px;
    font-weight: 800;
    letter-spacing: 3px;
    color: #fff;
}
.page-title i {
    font-style: normal;
    font-size: 28px;
    font-weight: 200;
    letter-spacing: 4px;
    color: var(--green-bright);
}
.page-desc {
    max-width: 760px;
    color: rgba(255, 255, 255, .78);
    font-size: 15px;
    line-height: 1.9;
    letter-spacing: .5px;
}

/* ---------- 首页快速入口（3 张卡片） ---------- */
.quick-entries {
    position: relative;
    padding: 90px 0;
    background: linear-gradient(180deg, #fff 0%, var(--sky) 50%, var(--light) 100%);
    overflow: hidden;
}
.quick-entries::before {
    content: '';
    position: absolute;
    left: 50%; top: 0; bottom: 0;
    width: 620px;
    transform: translateX(-50%);
    background-image: repeating-linear-gradient(90deg,
        rgba(0, 135, 85, 0.10) 0, rgba(0, 135, 85, 0.10) 1px,
        transparent 1px, transparent 7px);
    -webkit-mask-image: radial-gradient(ellipse at center, #000 25%, transparent 72%);
    mask-image: radial-gradient(ellipse at center, #000 25%, transparent 72%);
    pointer-events: none;
}
.quick-entries-inner {
    position: relative;
    z-index: 1;
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 40px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.quick-entry-card {
    display: flex;
    flex-direction: column;
    background: #fff;
    border-radius: 6px;
    overflow: hidden;
    box-shadow: 0 8px 28px rgba(0, 60, 40, .08);
    transition: transform .4s ease, box-shadow .4s ease;
}
.quick-entry-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 14px 36px rgba(0, 60, 40, .14);
}
.qec-media {
    height: 200px;
    background-size: cover;
    background-position: center;
    background-color: var(--ink-2);
    position: relative;
}
.qec-media::after {
    content: '';
    position: absolute; inset: 0;
    background: linear-gradient(180deg, transparent 55%, rgba(0, 40, 26, .35));
}
.qec-body {
    padding: 24px 24px 26px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1;
}
.qec-body h3 {
    color: var(--ink);
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 2px;
}
.qec-body > span {
    color: var(--green);
    font-size: 12px;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 8px;
}
.qec-body p {
    color: rgba(0, 0, 0, .62);
    font-size: 13px;
    line-height: 1.9;
    flex: 1;
}
.qec-body em {
    font-style: normal;
    margin-top: 12px;
    color: var(--green);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 2px;
    transition: color .3s;
}
.quick-entry-card:hover .qec-body em { color: var(--green-bright); }

/* ---------- 产品中心页 ---------- */
.products-page {
    position: relative;
    padding: 70px 0 90px;
    background: linear-gradient(180deg, #fff 0%, var(--sky) 30%, var(--light) 100%);
    overflow: hidden;
}
.products-page .product-tabs { margin-bottom: 40px; }
.product-panels {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 40px;
}
.product-panel { display: none; }
.product-panel.active { display: block; animation: panelFade .45s ease; }
@keyframes panelFade {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}
.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.product-card {
    display: flex;
    flex-direction: column;
    background: #fff;
    border-radius: 6px;
    overflow: hidden;
    box-shadow: 0 6px 22px rgba(0, 60, 40, .07);
    transition: transform .4s ease, box-shadow .4s ease;
}
.product-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 14px 34px rgba(0, 60, 40, .14);
}
.pc-media {
    position: relative;
    aspect-ratio: 4 / 3;
    background: linear-gradient(180deg, #f4f8f9 0%, #e6eef1 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.pc-media img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 18px;
    transition: transform .5s ease;
}
.product-card:hover .pc-media img { transform: scale(1.05); }
.pc-body {
    padding: 20px 22px 24px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
}
.pc-body h3 {
    color: var(--ink);
    font-size: 17px;
    font-weight: 700;
    letter-spacing: 1px;
    line-height: 1.4;
}
.pc-body p {
    color: rgba(0, 0, 0, .6);
    font-size: 13px;
    line-height: 1.85;
    flex: 1;
}
.pc-body em {
    font-style: normal;
    margin-top: 8px;
    color: var(--green);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 2px;
    transition: color .3s;
}
.product-card:hover .pc-body em { color: var(--green-bright); }

/* ---------- 照明方案页 ---------- */
.solutions-page {
    padding: 80px 0 100px;
    background: #fff;
}
.solution-grid-page {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 40px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
.solution-card-page {
    position: relative;
    height: 340px;
    background-size: cover;
    background-position: center;
    background-color: var(--ink-2);
    overflow: hidden;
    display: flex;
    align-items: flex-end;
    color: #fff;
    isolation: isolate;
    border-radius: 4px;
    transition: transform .4s ease;
}
.solution-card-page.featured {
    grid-column: span 2;
    grid-row: span 2;
    height: 700px;
}
.solution-card-page::before {
    content: '';
    position: absolute; inset: 0;
    background: linear-gradient(180deg, transparent 25%, rgba(0, 40, 26, .85));
    z-index: -1;
    transition: background .4s;
}
.solution-card-page:hover { transform: translateY(-6px); }
.scp-body {
    padding: 28px 26px;
    width: 100%;
}
.scp-body h3 {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: 4px;
}
.solution-card-page.featured .scp-body h3 { font-size: 32px; }
.scp-body > span {
    display: block;
    color: var(--green-bright);
    font-size: 12px;
    letter-spacing: 2px;
    margin-bottom: 12px;
    text-transform: uppercase;
}
.scp-body p {
    color: rgba(255, 255, 255, .82);
    font-size: 13px;
    line-height: 1.85;
    margin-bottom: 14px;
}
.scp-body em {
    font-style: normal;
    color: var(--green-bright);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 2px;
}

/* ---------- 工程案例页 ---------- */
.cases-page {
    padding: 80px 0 100px;
    background: linear-gradient(180deg, #fff 0%, var(--light) 100%);
}
.case-grid {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 40px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.case-card {
    display: flex;
    flex-direction: column;
    background: #fff;
    border-radius: 6px;
    overflow: hidden;
    box-shadow: 0 6px 22px rgba(0, 60, 40, .08);
    transition: transform .4s ease, box-shadow .4s ease;
}
.case-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 14px 34px rgba(0, 60, 40, .16);
}
.cc-media {
    position: relative;
    height: 220px;
    background-size: cover;
    background-position: center 30%;
    background-color: var(--ink-2);
}
.cc-media::after {
    content: '';
    position: absolute; inset: 0;
    background: linear-gradient(180deg, transparent 55%, rgba(0, 0, 0, .35));
}
.case-year-badge {
    position: absolute;
    top: 14px; left: 14px;
    z-index: 2;
    padding: 6px 14px;
    background: rgba(0, 135, 85, .92);
    color: #fff;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 1px;
    border-radius: 2px;
    clip-path: polygon(6% 0, 100% 0, 94% 100%, 0 100%);
}
.cc-body {
    padding: 22px 22px 24px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
}
.cc-body h3 {
    color: var(--ink);
    font-size: 17px;
    font-weight: 700;
    letter-spacing: 1px;
    line-height: 1.45;
}
.cc-body p {
    color: rgba(0, 0, 0, .62);
    font-size: 13px;
    line-height: 1.85;
    flex: 1;
}
.cc-location {
    display: inline-block;
    color: var(--green);
    font-size: 12px;
    letter-spacing: 1px;
    padding-top: 4px;
    border-top: 1px dashed rgba(0, 135, 85, .3);
    margin-top: 4px;
}
.cc-body em {
    font-style: normal;
    margin-top: 8px;
    color: var(--green);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 2px;
    transition: color .3s;
}
.case-card:hover .cc-body em { color: var(--green-bright); }

/* ---------- 新闻动态独立页 ---------- */
.news-page {
    padding: 80px 0 100px;
    background: linear-gradient(180deg, #fff 0%, var(--light) 100%);
}
.news-grid {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 40px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.news-article {
    display: flex;
    flex-direction: column;
    background: #fff;
    border-radius: 6px;
    overflow: hidden;
    text-decoration: none;
    box-shadow: 0 6px 22px rgba(0, 60, 40, .08);
    transition: transform .4s ease, box-shadow .4s ease;
}
.news-article:hover {
    transform: translateY(-6px);
    box-shadow: 0 14px 34px rgba(0, 60, 40, .16);
}
.na-media {
    position: relative;
    height: 210px;
    background-size: cover;
    background-position: center 35%;
    background-color: var(--ink-2);
}
.na-media::after {
    content: '';
    position: absolute; inset: 0;
    background: linear-gradient(180deg, transparent 55%, rgba(0, 0, 0, .35));
}
.na-date {
    position: absolute;
    top: 14px; left: 14px;
    z-index: 2;
    padding: 6px 14px;
    background: rgba(0, 135, 85, .92);
    color: #fff;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 1px;
    border-radius: 2px;
    clip-path: polygon(4% 0, 100% 0, 96% 100%, 0 100%);
}
.na-body {
    padding: 22px 22px 24px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    flex: 1;
}
.na-tag {
    align-self: flex-start;
    color: var(--green);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 1px;
    padding: 3px 12px;
    border: 1px solid rgba(0, 135, 85, .3);
    border-radius: 999px;
}
.na-body h3 {
    color: var(--ink);
    font-size: 17px;
    font-weight: 700;
    letter-spacing: .5px;
    line-height: 1.5;
}
.na-body p {
    color: rgba(0, 0, 0, .62);
    font-size: 13px;
    line-height: 1.85;
    flex: 1;
}
.na-body em {
    font-style: normal;
    margin-top: 6px;
    color: var(--green);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 2px;
    transition: color .3s;
}
.news-article:hover .na-body em { color: var(--green-bright); }

/* ---------- 英文模式适配（新增组件） ---------- */
html[lang="en-US"] .page-title b { font-size: 38px; letter-spacing: 1px; }
html[lang="en-US"] .page-title i { font-size: 22px; letter-spacing: 3px; }
html[lang="en-US"] .page-desc { font-size: 14px; line-height: 1.75; }
html[lang="en-US"] .qec-body h3 { font-size: 20px; letter-spacing: .5px; }
html[lang="en-US"] .qec-body > span { font-size: 11px; }
html[lang="en-US"] .pc-body h3 { font-size: 15px; letter-spacing: .3px; line-height: 1.45; }
html[lang="en-US"] .scp-body h3 { font-size: 20px; letter-spacing: .5px; }
html[lang="en-US"] .solution-card-page.featured .scp-body h3 { font-size: 26px; }
html[lang="en-US"] .cc-body h3 { font-size: 15px; letter-spacing: .3px; line-height: 1.5; }
html[lang="en-US"] .cc-location { font-size: 11px; }
html[lang="en-US"] .na-body h3 { font-size: 15px; letter-spacing: .3px; line-height: 1.5; }
html[lang="en-US"] .na-tag { font-size: 11px; letter-spacing: .5px; }

/* ---------- 响应式（新增组件） ---------- */
@media (max-width: 1100px) {
    .quick-entries-inner { grid-template-columns: repeat(2, 1fr); }
    .product-grid { grid-template-columns: repeat(2, 1fr); }
    .solution-grid-page { grid-template-columns: repeat(2, 1fr); }
    .solution-card-page.featured { grid-column: span 2; grid-row: auto; height: 340px; }
    .case-grid { grid-template-columns: repeat(2, 1fr); }
    .news-grid { grid-template-columns: repeat(2, 1fr); }
    .page-title b { font-size: 38px; }
    .page-title i { font-size: 22px; }
}
@media (max-width: 900px) {
    .page-hero { padding: 130px 0 56px; }
    .page-hero-inner { padding: 0 28px; }
    .page-title b { font-size: 32px; }
    .page-title i { font-size: 18px; }
    .page-desc { font-size: 14px; }
    .quick-entries { padding: 70px 0; }
    .quick-entries-inner { padding: 0 28px; gap: 18px; }
    .products-page { padding: 56px 0 70px; }
    .product-panels { padding: 0 28px; }
    .solutions-page { padding: 60px 0 80px; }
    .solution-grid-page { padding: 0 28px; gap: 16px; }
    .solution-card-page { height: 280px; }
    .solution-card-page.featured { height: 280px; }
    .cases-page { padding: 60px 0 80px; }
    .case-grid { padding: 0 28px; gap: 18px; }
    .news-page { padding: 60px 0 80px; }
    .news-grid { padding: 0 28px; gap: 18px; }
}
@media (max-width: 600px) {
    .page-hero { padding: 120px 0 48px; }
    .page-title { gap: 10px; }
    .page-title b { font-size: 26px; letter-spacing: 1px; }
    .page-title i { font-size: 15px; letter-spacing: 2px; }
    .breadcrumb { font-size: 12px; margin-bottom: 16px; }
    .quick-entries-inner { grid-template-columns: 1fr; padding: 0 20px; }
    .qec-media { height: 170px; }
    .product-panels { padding: 0 20px; }
    .product-grid { grid-template-columns: 1fr; gap: 18px; }
    .solution-grid-page { grid-template-columns: 1fr; padding: 0 20px; }
    .solution-card-page,
    .solution-card-page.featured { grid-column: auto; height: 260px; }
    .case-grid { grid-template-columns: 1fr; padding: 0 20px; }
    .cc-media { height: 200px; }
    .news-grid { grid-template-columns: 1fr; padding: 0 20px; }
    .na-media { height: 190px; }
}