/* ==========================================================================
   云启科技 YunQi Tech - 企业官网样式
   深色科技风 · 手写原生 CSS · 无任何外部依赖
   ========================================================================== */

:root {
    --bg: #0A1230;
    --bg-2: #0C1638;
    --panel: #111D44;
    --panel-2: #16234F;
    --line: rgba(148, 163, 255, 0.14);
    --line-strong: rgba(148, 163, 255, 0.28);
    --primary: #2563EB;
    --violet: #7C3AED;
    --cyan: #22D3EE;
    --grad: linear-gradient(135deg, #2563EB 0%, #7C3AED 100%);
    --grad-soft: linear-gradient(135deg, rgba(37,99,235,.18), rgba(124,58,237,.18));
    --text: #E8EDFF;
    --muted: #9AA6CF;
    --muted-2: #6B78A6;
    --white: #ffffff;
    --danger: #F87171;
    --success: #34D399;
    --radius: 14px;
    --radius-lg: 20px;
    --shadow: 0 18px 50px rgba(2, 6, 23, 0.45);
    --container: 1200px;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Segoe UI", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color .2s ease; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; }

.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}

.site-main { min-height: 60vh; }

/* ---------- 通用标题区 ---------- */
.section { padding: 88px 0; position: relative; }
.section-alt { background: var(--bg-2); }

.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-head .eyebrow {
    display: inline-block;
    font-size: 13px;
    letter-spacing: 3px;
    color: var(--cyan);
    text-transform: uppercase;
    margin-bottom: 14px;
    font-weight: 600;
}
.section-head h2 {
    font-size: 34px;
    line-height: 1.3;
    font-weight: 700;
    margin-bottom: 16px;
}
.section-head h2 .grad-text {
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.section-head p { color: var(--muted); font-size: 16px; }

.grad-text {
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* ---------- 按钮 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 13px 30px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    border: 1px solid transparent;
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
    white-space: nowrap;
}
.btn-primary {
    background: var(--grad);
    color: var(--white);
    box-shadow: 0 10px 26px rgba(55, 90, 240, .35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 32px rgba(99, 72, 240, .45); }
.btn-ghost {
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--line-strong);
    color: var(--text);
    backdrop-filter: blur(6px);
}
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); transform: translateY(-2px); }
.btn-sm { padding: 8px 18px; font-size: 13px; border-radius: 8px; }

/* ==========================================================================
   导航
   ========================================================================== */
.site-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    transition: background .25s ease, box-shadow .25s ease, border-color .25s ease;
    border-bottom: 1px solid transparent;
}
.site-header.scrolled {
    background: rgba(10, 18, 48, 0.88);
    backdrop-filter: blur(14px);
    border-bottom-color: var(--line);
    box-shadow: 0 8px 30px rgba(2, 6, 23, .35);
}
.nav-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}
.logo { display: flex; align-items: center; gap: 10px; }
.logo-text { display: flex; flex-direction: column; line-height: 1.15; }
.logo-text strong { font-size: 18px; font-weight: 700; letter-spacing: 1px; }
.logo-text em { font-style: normal; font-size: 10px; color: var(--muted-2); letter-spacing: 2px; }

.main-nav { display: flex; align-items: center; gap: 6px; }
.main-nav > a {
    padding: 8px 16px;
    font-size: 15px;
    color: var(--muted);
    border-radius: 8px;
    position: relative;
}
.main-nav > a:hover { color: var(--text); }
.main-nav > a.active { color: var(--white); }
.main-nav > a.active::after {
    content: "";
    position: absolute;
    left: 16px; right: 16px; bottom: 0;
    height: 2px;
    background: var(--grad);
    border-radius: 2px;
}
.main-nav .nav-cta {
    margin-left: 10px;
    padding: 9px 22px;
    color: var(--white) !important;
    background: var(--grad);
    border-radius: 999px;
    font-weight: 600;
}
.main-nav .nav-cta::after { display: none; }
.main-nav .nav-cta:hover { box-shadow: 0 8px 22px rgba(80, 80, 240, .4); }

.nav-toggle {
    display: none;
    width: 42px; height: 42px;
    background: transparent;
    border: 1px solid var(--line);
    border-radius: 10px;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
}
.nav-toggle span {
    display: block;
    width: 20px; height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: transform .25s ease, opacity .25s ease;
}
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
    position: relative;
    min-height: 680px;
    display: flex;
    align-items: center;
    padding: 150px 0 90px;
    overflow: hidden;
    background-image:
        linear-gradient(120deg, rgba(10,18,48,.94) 0%, rgba(12,22,56,.82) 48%, rgba(124,58,237,.55) 100%),
        url('https://trae-api-cn.mchost.guru/api/ide/v1/text_to_image?prompt=hero%20banner%20of%20cloud%20computing%20and%20artificial%20intelligence%20convergence%2C%20glowing%20digital%20cloud%20with%20neural%20network%2C%20deep%20blue%20and%20purple%20gradient%2C%20futuristic%20technology%2C%20wide%20cinematic&image_size=landscape_16_9');
    background-size: cover;
    background-position: center;
}
.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(96, 128, 255, .07) 1px, transparent 1px),
        linear-gradient(90deg, rgba(96, 128, 255, .07) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse 80% 70% at 50% 38%, #000 30%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 38%, #000 30%, transparent 75%);
}
.hero::after {
    content: "";
    position: absolute;
    width: 620px; height: 620px;
    right: -160px; top: -120px;
    background: radial-gradient(circle, rgba(124,58,237,.45), transparent 65%);
    filter: blur(20px);
}
.hero-inner { position: relative; z-index: 2; max-width: 760px; }
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 16px;
    border: 1px solid var(--line-strong);
    border-radius: 999px;
    background: rgba(34, 211, 238, .08);
    color: var(--cyan);
    font-size: 13px;
    margin-bottom: 26px;
}
.hero-badge i {
    width: 7px; height: 7px; border-radius: 50%;
    background: var(--cyan);
    box-shadow: 0 0 10px var(--cyan);
}
.hero h1 {
    font-size: 52px;
    line-height: 1.22;
    font-weight: 800;
    margin-bottom: 22px;
    letter-spacing: 1px;
}
.hero p.hero-sub {
    font-size: 18px;
    color: var(--muted);
    max-width: 620px;
    margin-bottom: 38px;
}
.hero-actions { display: flex; gap: 18px; flex-wrap: wrap; }

/* ==========================================================================
   核心优势
   ========================================================================== */
.advantage-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.advantage-card {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 34px 26px;
    transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
}
.advantage-card:hover {
    transform: translateY(-6px);
    border-color: rgba(96, 128, 255, .5);
    box-shadow: var(--shadow);
}
.adv-icon {
    width: 54px; height: 54px;
    display: flex; align-items: center; justify-content: center;
    border-radius: 14px;
    background: var(--grad-soft);
    border: 1px solid var(--line);
    margin-bottom: 20px;
}
.adv-icon svg { stroke: var(--cyan); }
.advantage-card h3 { font-size: 18px; margin-bottom: 10px; }
.advantage-card p { color: var(--muted); font-size: 14px; }

/* ==========================================================================
   产品卡片
   ========================================================================== */
.product-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.product-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }

.product-card {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
}
.product-card:hover {
    transform: translateY(-6px);
    border-color: rgba(124, 58, 237, .5);
    box-shadow: var(--shadow);
}
.product-thumb {
    position: relative;
    aspect-ratio: 4 / 3;
    overflow: hidden;
}
.product-thumb img {
    width: 100%; height: 100%;
    object-fit: cover;
    transition: transform .45s ease;
}
.product-card:hover .product-thumb img { transform: scale(1.06); }
.product-thumb::after {
    content: "";
    position: absolute; inset: 0;
    background: linear-gradient(180deg, transparent 55%, rgba(17,29,68,.85));
}
.product-cate {
    position: absolute;
    left: 14px; top: 14px;
    z-index: 2;
    padding: 4px 12px;
    font-size: 12px;
    border-radius: 999px;
    color: var(--cyan);
    background: rgba(10, 18, 48, .7);
    border: 1px solid rgba(34, 211, 238, .35);
    backdrop-filter: blur(4px);
}
.product-body { padding: 22px 22px 24px; display: flex; flex-direction: column; flex: 1; }
.product-body h3 { font-size: 18px; margin-bottom: 10px; }
.product-body p { color: var(--muted); font-size: 14px; margin-bottom: 18px; flex: 1; }
.product-link {
    color: var(--cyan);
    font-size: 14px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.product-link svg { transition: transform .2s ease; }
.product-card:hover .product-link svg { transform: translateX(4px); }

/* ==========================================================================
   数据带
   ========================================================================== */
.stat-band {
    background:
        radial-gradient(ellipse 70% 120% at 20% 0%, rgba(37,99,235,.25), transparent 60%),
        radial-gradient(ellipse 70% 120% at 85% 100%, rgba(124,58,237,.28), transparent 60%),
        var(--bg-2);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}
.stat-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    text-align: center;
}
.stat-item { padding: 18px 0; }
.stat-num {
    font-size: 44px;
    font-weight: 800;
    line-height: 1.1;
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.stat-label { color: var(--muted); font-size: 15px; margin-top: 8px; }

/* ==========================================================================
   新闻
   ========================================================================== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 26px;
}
.news-card {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
    transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
    display: flex;
    flex-direction: column;
}
.news-card:hover { transform: translateY(-6px); border-color: rgba(37,99,235,.5); box-shadow: var(--shadow); }
.news-thumb { display: block; aspect-ratio: 16 / 9; overflow: hidden; }
.news-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .45s ease; }
.news-card:hover .news-thumb img { transform: scale(1.06); }
.news-body { padding: 22px; display: flex; flex-direction: column; flex: 1; }
.news-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; font-size: 13px; color: var(--muted-2); }
.news-cate {
    padding: 2px 10px;
    border-radius: 6px;
    font-size: 12px;
    color: var(--cyan);
    background: rgba(34, 211, 238, .1);
}
.news-card h3 { font-size: 17px; line-height: 1.5; margin-bottom: 10px; }
.news-card h3 a:hover { color: var(--cyan); }
.news-card p { color: var(--muted); font-size: 14px; margin-bottom: 16px; flex: 1; }
.news-more { color: var(--cyan); font-size: 14px; font-weight: 600; }

/* 新闻列表页（横向卡片） */
.news-list { display: flex; flex-direction: column; gap: 24px; }
.news-item {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 28px;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 20px;
    transition: transform .25s ease, border-color .25s ease;
}
.news-item:hover { transform: translateY(-4px); border-color: rgba(37,99,235,.5); }
.news-item .news-thumb { border-radius: 10px; aspect-ratio: 4/3; }
.news-item h3 { font-size: 20px; margin: 8px 0 12px; }
.news-item h3 a:hover { color: var(--cyan); }
.news-item p { color: var(--muted); font-size: 14px; margin-bottom: 16px; }

/* 分类筛选 */
.filter-tabs {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 44px;
}
.filter-tabs button, .filter-tabs a {
    padding: 9px 26px;
    border-radius: 999px;
    border: 1px solid var(--line);
    background: var(--panel);
    color: var(--muted);
    font-size: 14px;
    transition: all .2s ease;
}
.filter-tabs button:hover, .filter-tabs a:hover { color: var(--text); border-color: var(--line-strong); }
.filter-tabs button.active, .filter-tabs a.active {
    background: var(--grad);
    color: var(--white);
    border-color: transparent;
}

/* ==========================================================================
   客户墙
   ========================================================================== */
.logo-wall {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
}
.logo-item {
    height: 86px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 12px;
    color: var(--muted-2);
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 1px;
    transition: all .25s ease;
}
.logo-item:hover { color: var(--muted); border-color: var(--line-strong); background: var(--panel-2); }
.logo-item svg { opacity: .55; }

/* ==========================================================================
   CTA
   ========================================================================== */
.cta-band { padding: 70px 0; }
.cta-box {
    position: relative;
    overflow: hidden;
    text-align: center;
    padding: 64px 32px;
    border-radius: var(--radius-lg);
    background: var(--grad);
    box-shadow: 0 24px 60px rgba(80, 70, 240, .35);
}
.cta-box::before {
    content: "";
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px);
    background-size: 40px 40px;
}
.cta-box h2 { position: relative; font-size: 30px; margin-bottom: 14px; }
.cta-box p { position: relative; color: rgba(255,255,255,.85); margin-bottom: 30px; font-size: 16px; }
.cta-box .btn { position: relative; background: var(--white); color: var(--primary); }
.cta-box .btn:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(0,0,0,.25); }

/* ==========================================================================
   内页通用（页面头）
   ========================================================================== */
.page-hero {
    padding: 150px 0 64px;
    background:
        radial-gradient(ellipse 60% 90% at 80% 0%, rgba(124,58,237,.3), transparent 60%),
        radial-gradient(ellipse 60% 90% at 10% 10%, rgba(37,99,235,.28), transparent 60%),
        var(--bg-2);
    border-bottom: 1px solid var(--line);
    text-align: center;
}
.page-hero h1 { font-size: 38px; margin-bottom: 14px; }
.page-hero p { color: var(--muted); font-size: 16px; max-width: 640px; margin: 0 auto; }
.crumb { font-size: 13px; color: var(--muted-2); margin-top: 18px; }
.crumb a:hover { color: var(--cyan); }

/* ==========================================================================
   关于我们
   ========================================================================== */
.about-intro {
    display: grid;
    grid-template-columns: 1.05fr 1fr;
    gap: 56px;
    align-items: center;
}
.about-intro-text h2 { font-size: 30px; margin-bottom: 20px; }
.about-intro-text p { color: var(--muted); margin-bottom: 16px; }
.about-intro-media img { border-radius: var(--radius-lg); box-shadow: var(--shadow); width: 100%; }
.about-intro-media { position: relative; }
.about-intro-media::after {
    content: "";
    position: absolute;
    inset: 18px -18px -18px 18px;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-lg);
    z-index: -1;
}

.about-points { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-top: 26px; }
.about-point {
    display: flex; gap: 12px; align-items: flex-start;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 16px 18px;
    font-size: 14px;
}
.about-point svg { flex-shrink: 0; margin-top: 3px; }

/* 时间轴 */
.timeline { position: relative; max-width: 900px; margin: 0 auto; padding-left: 38px; }
.timeline::before {
    content: "";
    position: absolute;
    left: 9px; top: 6px; bottom: 6px;
    width: 2px;
    background: linear-gradient(180deg, var(--primary), var(--violet));
    opacity: .55;
}
.tl-item { position: relative; padding: 0 0 38px 30px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
    content: "";
    position: absolute;
    left: -38px; top: 6px;
    width: 20px; height: 20px;
    border-radius: 50%;
    background: var(--bg);
    border: 3px solid var(--cyan);
    box-shadow: 0 0 0 5px rgba(34,211,238,.12);
}
.tl-year {
    display: inline-block;
    font-size: 14px;
    font-weight: 700;
    color: var(--cyan);
    margin-bottom: 6px;
}
.tl-item h3 { font-size: 18px; margin-bottom: 6px; }
.tl-item p { color: var(--muted); font-size: 14px; }

/* 企业文化 */
.culture-grid { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 24px; }
.culture-card {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 34px 30px;
}
.culture-card.featured { background: var(--grad-soft); border-color: rgba(124,58,237,.4); }
.culture-card .cul-label { color: var(--cyan); font-size: 13px; letter-spacing: 2px; margin-bottom: 12px; }
.culture-card h3 { font-size: 22px; margin-bottom: 12px; }
.culture-card p { color: var(--muted); font-size: 14px; }
.culture-values { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.culture-values span {
    padding: 6px 16px;
    border-radius: 999px;
    background: rgba(34,211,238,.1);
    border: 1px solid rgba(34,211,238,.3);
    color: var(--cyan);
    font-size: 13px;
}

/* 资质荣誉 */
.honor-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.honor-card {
    display: flex;
    align-items: center;
    gap: 18px;
    background: rgba(255,255,255,.045);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 24px;
    transition: border-color .25s ease, transform .25s ease;
}
.honor-card:hover { border-color: var(--line-strong); transform: translateY(-4px); }
.honor-badge {
    width: 52px; height: 52px;
    flex-shrink: 0;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    background: var(--grad-soft);
    border: 1px solid rgba(124,58,237,.4);
}
.honor-card h3 { font-size: 15px; margin-bottom: 4px; }
.honor-card p { font-size: 12px; color: var(--muted-2); }

.office-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.office-grid img { width: 100%; border-radius: var(--radius); box-shadow: var(--shadow); }

/* ==========================================================================
   产品详情
   ========================================================================== */
.detail-layout { display: grid; grid-template-columns: 1fr 340px; gap: 40px; align-items: start; }
.detail-main h1 { font-size: 30px; margin: 20px 0 16px; }
.detail-cover { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow); }
.detail-cover img { width: 100%; }
.detail-block { margin-top: 40px; }
.detail-block h2 {
    font-size: 22px;
    margin-bottom: 18px;
    padding-left: 14px;
    border-left: 4px solid;
    border-image: var(--grad) 1;
}
.detail-block p { color: var(--muted); margin-bottom: 14px; }
.feature-list { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.feature-list li {
    display: flex; gap: 10px; align-items: flex-start;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 15px 18px;
    font-size: 14px;
}
.feature-list svg { flex-shrink: 0; margin-top: 4px; }

.scenario-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.scenario-item {
    background: var(--grad-soft);
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 18px 20px;
    font-weight: 600;
    font-size: 15px;
}

.detail-aside { position: sticky; top: 96px; display: flex; flex-direction: column; gap: 22px; }
.info-card {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 26px;
}
.info-card h3 { font-size: 17px; margin-bottom: 16px; }
.info-row { display: flex; justify-content: space-between; gap: 16px; padding: 11px 0; border-bottom: 1px dashed var(--line); font-size: 14px; }
.info-row:last-of-type { border-bottom: none; }
.info-row span:first-child { color: var(--muted); }
.info-card .btn { width: 100%; margin-top: 14px; }
.related-card {
    display: flex; gap: 12px; align-items: center;
    padding: 10px 0;
    border-bottom: 1px dashed var(--line);
}
.related-card:last-child { border-bottom: none; }
.related-card img { width: 84px; height: 62px; object-fit: cover; border-radius: 8px; }
.related-card strong { font-size: 14px; display: block; line-height: 1.4; }
.related-card:hover strong { color: var(--cyan); }
.related-card small { color: var(--muted-2); font-size: 12px; }

/* ==========================================================================
   新闻详情
   ========================================================================== */
.article { max-width: 820px; margin: 0 auto; }
.article h1 { font-size: 30px; line-height: 1.4; margin-bottom: 18px; }
.article-meta {
    display: flex; gap: 22px; flex-wrap: wrap;
    color: var(--muted-2);
    font-size: 14px;
    padding-bottom: 22px;
    border-bottom: 1px solid var(--line);
    margin-bottom: 30px;
}
.article-cover { border-radius: var(--radius); overflow: hidden; margin-bottom: 30px; }
.article-body p { color: #C6D0F2; font-size: 16px; margin-bottom: 20px; line-height: 1.9; }
.article-body img { border-radius: var(--radius); margin: 26px 0; }
.article-nav {
    display: flex; justify-content: space-between; gap: 20px;
    margin-top: 44px; padding-top: 24px;
    border-top: 1px solid var(--line);
}
.article-nav a {
    flex: 1;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 16px 20px;
    font-size: 14px;
    color: var(--muted);
}
.article-nav a.next { text-align: right; }
.article-nav a:hover { color: var(--cyan); border-color: rgba(34,211,238,.4); }
.article-nav strong { display: block; color: var(--text); margin-top: 4px; font-size: 14px; }

/* ==========================================================================
   联系我们
   ========================================================================== */
.contact-layout { display: grid; grid-template-columns: 1fr 1.15fr; gap: 40px; align-items: start; }
.contact-info h2 { font-size: 26px; margin-bottom: 16px; }
.contact-info > p { color: var(--muted); margin-bottom: 30px; }
.contact-line { display: flex; gap: 16px; margin-bottom: 24px; }
.contact-icon {
    width: 48px; height: 48px; flex-shrink: 0;
    border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    background: var(--grad-soft);
    border: 1px solid var(--line);
}
.contact-line h4 { font-size: 15px; margin-bottom: 4px; }
.contact-line p { color: var(--muted); font-size: 14px; word-break: break-all; }
.contact-map { margin-top: 10px; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); }
.contact-map img { width: 100%; }

.form-card {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 36px 34px;
    box-shadow: var(--shadow);
}
.form-card h3 { font-size: 20px; margin-bottom: 6px; }
.form-card > p { color: var(--muted); font-size: 14px; margin-bottom: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 14px; margin-bottom: 8px; color: var(--text); }
.form-group label em { color: var(--danger); font-style: normal; margin-left: 3px; }
.form-group input, .form-group textarea, .form-group select {
    width: 100%;
    padding: 12px 15px;
    background: var(--bg-2);
    border: 1px solid var(--line);
    border-radius: 10px;
    color: var(--text);
    font-size: 14px;
    font-family: inherit;
    transition: border-color .2s ease, box-shadow .2s ease;
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37,99,235,.2);
}
.form-group input.invalid, .form-group textarea.invalid { border-color: var(--danger); }
.form-error {
    display: none;
    background: rgba(248,113,113,.12);
    border: 1px solid rgba(248,113,113,.4);
    color: #FCA5A5;
    padding: 11px 16px;
    border-radius: 10px;
    font-size: 14px;
    margin-bottom: 18px;
}
.form-error.show { display: block; }
.form-success {
    background: rgba(52,211,153,.12);
    border: 1px solid rgba(52,211,153,.4);
    color: var(--success);
    padding: 13px 18px;
    border-radius: 10px;
    font-size: 14px;
    margin-bottom: 20px;
}
.form-card .btn { width: 100%; }
.btn[disabled] { opacity: .6; cursor: not-allowed; transform: none !important; }

.empty-tip {
    text-align: center;
    color: var(--muted);
    padding: 60px 0;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer { background: #070D24; border-top: 1px solid var(--line); margin-top: 40px; }
.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.4fr;
    gap: 40px;
    padding: 64px 24px 48px;
}
.footer-col h4 { font-size: 15px; margin-bottom: 20px; color: var(--text); }
.footer-col ul li { margin-bottom: 12px; }
.footer-col ul li a { color: var(--muted); font-size: 14px; }
.footer-col ul li a:hover { color: var(--cyan); }
.footer-logo { margin-bottom: 16px; }
.footer-slogan { color: var(--cyan); font-size: 14px; margin-bottom: 12px; font-weight: 600; }
.footer-desc { color: var(--muted-2); font-size: 13px; line-height: 1.8; }
.footer-contact li { display: flex; gap: 10px; align-items: flex-start; color: var(--muted); font-size: 14px; }
.footer-contact svg { margin-top: 5px; flex-shrink: 0; }
.footer-bottom { border-top: 1px solid rgba(148,163,255,.1); padding: 20px 0; }
.footer-bottom-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    color: var(--muted-2);
    font-size: 13px;
}
.footer-record { display: flex; gap: 18px; flex-wrap: wrap; align-items: center; }
.footer-record a { color: var(--muted-2); }
.footer-record a:hover { color: var(--cyan); }

/* ==========================================================================
   渐入动画
   ========================================================================== */
.reveal {
    opacity: 0;
    transform: translateY(26px);
    transition: opacity .7s ease, transform .7s ease;
}
.reveal.in { opacity: 1; transform: translateY(0); }

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 980px) {
    .product-grid, .advantage-grid { grid-template-columns: repeat(2, 1fr); }
    .product-grid.cols-3, .news-grid { grid-template-columns: repeat(2, 1fr); }
    .stat-grid { grid-template-columns: repeat(2, 1fr); gap: 30px 20px; }
    .logo-wall { grid-template-columns: repeat(2, 1fr); }
    .about-intro { grid-template-columns: 1fr; gap: 40px; }
    .detail-layout { grid-template-columns: 1fr; }
    .detail-aside { position: static; }
    .contact-layout { grid-template-columns: 1fr; }
    .culture-grid { grid-template-columns: 1fr; }
    .honor-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    .hero h1 { font-size: 40px; }
    .section { padding: 64px 0; }
    .news-item { grid-template-columns: 1fr; gap: 18px; }
    .news-item .news-thumb { aspect-ratio: 16/9; }
}

@media (max-width: 720px) {
    .nav-toggle { display: flex; }
    .main-nav {
        position: fixed;
        top: 72px; left: 0; right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        background: rgba(10, 18, 48, .97);
        backdrop-filter: blur(16px);
        border-bottom: 1px solid var(--line);
        padding: 10px 24px 20px;
        display: none;
    }
    .main-nav.open { display: flex; }
    .main-nav > a { padding: 14px 10px; border-bottom: 1px solid var(--line); border-radius: 0; }
    .main-nav > a.active::after { display: none; }
    .main-nav > a.active { color: var(--cyan); }
    .main-nav .nav-cta { margin: 16px 0 0; text-align: center; border-radius: 10px; }

    .hero { min-height: auto; padding: 120px 0 64px; }
    .hero h1 { font-size: 30px; }
    .hero p.hero-sub { font-size: 15px; }
    .hero-actions .btn { width: 100%; }
    .section-head h2 { font-size: 25px; }
    .product-grid, .product-grid.cols-3, .news-grid,
    .advantage-grid, .feature-list, .scenario-grid,
    .honor-grid, .office-grid, .about-points { grid-template-columns: 1fr; }
    .stat-grid { grid-template-columns: 1fr 1fr; }
    .stat-num { font-size: 32px; }
    .form-row { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 28px; padding: 44px 24px 32px; }
    .page-hero { padding: 120px 0 44px; }
    .page-hero h1 { font-size: 27px; }
    .article h1 { font-size: 23px; }
    .article-nav { flex-direction: column; }
    .article-nav a.next { text-align: left; }
    .form-card { padding: 26px 22px; }
    .cta-box { padding: 44px 22px; }
    .cta-box h2 { font-size: 23px; }
    .timeline { padding-left: 30px; }
    .footer-bottom-inner { justify-content: center; text-align: center; }
}