/* ============================================================
   山东长风智能科技有限公司 - 企业官网主样式
   设计语言：深空蓝 + 科技青，现代 SaaS 风格，移动优先响应式
   ============================================================ */
:root {
    --navy-900: #081230;
    --navy-800: #0d1b45;
    --navy-700: #13255c;
    --blue-600: #2563eb;
    --blue-500: #3b82f6;
    --blue-400: #60a5fa;
    --cyan-400: #22d3ee;
    --cyan-300: #67e8f9;
    --text-900: #101828;
    --text-600: #475467;
    --text-400: #98a2b3;
    --line-200: #e4e7ec;
    --bg-white: #ffffff;
    --bg-gray: #f5f7fb;
    --radius-lg: 16px;
    --radius-md: 12px;
    --radius-sm: 8px;
    --shadow-card: 0 8px 28px rgba(13, 27, 69, .08);
    --shadow-hover: 0 14px 40px rgba(37, 99, 235, .16);
    --font: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif;
    --container: 1200px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    font-family: var(--font);
    color: var(--text-900);
    background: var(--bg-white);
    line-height: 1.75;
    font-size: 16px;
}
img { max-width: 100%; display: block; }
a { color: var(--blue-600); text-decoration: none; transition: color .2s; }
a:hover { color: var(--blue-400); }
ul, ol { list-style: none; }
button { font-family: inherit; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 20px; }

/* ---------- 按钮 ---------- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 12px 26px; border-radius: var(--radius-sm);
    font-size: 15px; font-weight: 600; border: 1.5px solid transparent;
    cursor: pointer; transition: all .25s; white-space: nowrap;
}
.btn-primary { background: linear-gradient(135deg, var(--blue-600), var(--cyan-400)); color: #fff; box-shadow: 0 6px 18px rgba(37, 99, 235, .3); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 26px rgba(37, 99, 235, .4); color: #fff; }
.btn-outline { border-color: var(--blue-600); color: var(--blue-600); background: transparent; }
.btn-outline:hover { background: var(--blue-600); color: #fff; }
.btn-ghost { border-color: rgba(255,255,255,.4); color: #fff; }
.btn-ghost:hover { background: rgba(255,255,255,.12); color: #fff; }
.btn-light { background: #fff; color: var(--blue-600); }
.btn-light:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(0,0,0,.18); }
.btn-ghost-light { border-color: rgba(255,255,255,.5); color: #fff; background: transparent; }
.btn-ghost-light:hover { background: rgba(255,255,255,.12); color: #fff; }
.btn-block { width: 100%; }

/* ---------- 顶部导航 ---------- */
.site-header {
    position: sticky; top: 0; z-index: 100;
    background: rgba(8, 18, 48, .92); backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255,255,255,.08);
}
.header-inner { display: flex; align-items: center; gap: 32px; height: 72px; }
.logo { display: flex; align-items: center; gap: 10px; }
.logo img { width: 40px; height: 40px; border-radius: 10px; object-fit: cover; }
.logo-text { color: #fff; font-size: 19px; font-weight: 700; letter-spacing: .5px; display: flex; flex-direction: column; line-height: 1.2; }
.logo-text em { font-style: normal; font-size: 10px; color: var(--cyan-300); letter-spacing: 2.5px; font-weight: 500; }
.main-nav { margin-left: auto; }
.main-nav ul { display: flex; gap: 6px; }
.main-nav a {
    display: block; padding: 8px 16px; color: rgba(255,255,255,.82);
    font-size: 15px; border-radius: var(--radius-sm); font-weight: 500;
}
.main-nav a:hover, .main-nav a.active { color: #fff; background: rgba(59, 130, 246, .22); }
.header-cta .btn { padding: 9px 18px; font-size: 14px; }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: #fff; margin: 5px 0; border-radius: 2px; transition: all .3s; }

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; background: radial-gradient(1200px 500px at 70% -10%, #1a3a8f 0%, var(--navy-900) 55%); color: #fff; }
.hero-bg { position: absolute; inset: 0; pointer-events: none; }
.hero-glow { position: absolute; border-radius: 50%; filter: blur(90px); opacity: .5; }
.g1 { width: 420px; height: 420px; background: var(--blue-600); top: -120px; right: -60px; }
.g2 { width: 300px; height: 300px; background: var(--cyan-400); bottom: -140px; left: 8%; opacity: .28; }
.hero-inner { position: relative; display: grid; grid-template-columns: 1.2fr .8fr; gap: 48px; padding: 84px 20px 96px; align-items: center; }
.hero-badge {
    display: inline-block; padding: 6px 16px; border-radius: 999px;
    background: rgba(34, 211, 238, .12); border: 1px solid rgba(34, 211, 238, .35);
    color: var(--cyan-300); font-size: 13px; letter-spacing: 1px; margin-bottom: 22px;
}
.hero h1 { font-size: 44px; line-height: 1.28; font-weight: 800; letter-spacing: 1px; }
.hero h1 .grad { background: linear-gradient(90deg, var(--blue-400), var(--cyan-300)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-sub { margin: 20px 0 30px; color: rgba(255,255,255,.78); font-size: 16.5px; max-width: 620px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 44px; margin-top: 44px; flex-wrap: wrap; }
.hero-stats strong { font-size: 30px; font-weight: 800; color: #fff; }
.hero-stats strong span { color: var(--cyan-300); font-size: 18px; }
.hero-stats em { display: block; font-style: normal; color: rgba(255,255,255,.6); font-size: 13px; margin-top: 2px; }
.hero-art { position: relative; min-height: 320px; }
.hero-card {
    position: absolute; display: flex; align-items: center; gap: 12px;
    padding: 18px 24px; border-radius: var(--radius-md);
    background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.16);
    backdrop-filter: blur(8px); color: #fff; font-weight: 600; font-size: 15px;
    box-shadow: 0 16px 40px rgba(0,0,0,.25);
}
.hero-card svg { color: var(--cyan-300); }
.c1 { top: 8%; right: 18%; animation: float 6s ease-in-out infinite; }
.c2 { top: 42%; left: 4%; animation: float 7s ease-in-out .8s infinite; }
.c3 { bottom: 6%; right: 6%; animation: float 6.5s ease-in-out .4s infinite; }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-14px); } }

/* ---------- 通用 Section ---------- */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-gray); }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 52px; }
.section-head h2 { font-size: 32px; font-weight: 800; letter-spacing: 1px; position: relative; padding-bottom: 16px; }
.section-head h2::after { content: ""; position: absolute; left: 50%; bottom: 0; transform: translateX(-50%); width: 44px; height: 3px; border-radius: 3px; background: linear-gradient(90deg, var(--blue-600), var(--cyan-400)); }
.section-head p { color: var(--text-600); margin-top: 12px; }
.section-more { text-align: center; margin-top: 44px; }

/* ---------- 服务卡片 ---------- */
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.service-card {
    background: #fff; border: 1px solid var(--line-200); border-radius: var(--radius-lg);
    padding: 30px 26px; transition: all .3s; position: relative; overflow: hidden;
}
.service-card::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: linear-gradient(90deg, var(--blue-600), var(--cyan-400)); opacity: 0; transition: opacity .3s; }
.service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: transparent; }
.service-card:hover::before { opacity: 1; }
.service-icon { width: 56px; height: 56px; border-radius: 14px; display: flex; align-items: center; justify-content: center; margin-bottom: 18px; }
.icon-app { background: #eef4ff; color: var(--blue-600); }
.icon-mini { background: #ecfdf5; color: #10b981; }
.icon-web { background: #fff7ed; color: #f59e0b; }
.icon-sys { background: #f5f3ff; color: #8b5cf6; }
.icon-ai { background: #ecfeff; color: #06b6d4; }
.service-card h3 { font-size: 19px; font-weight: 700; margin-bottom: 10px; }
.service-card h3 a { color: var(--text-900); }
.service-card h3 a:hover { color: var(--blue-600); }
.service-card p { color: var(--text-600); font-size: 14.5px; min-height: 76px; }
.card-more { display: inline-flex; align-items: center; gap: 4px; font-size: 14px; font-weight: 600; margin-top: 14px; }

/* ---------- 优势 ---------- */
.adv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.adv-item { background: #fff; border-radius: var(--radius-lg); padding: 30px 24px; border: 1px solid var(--line-200); transition: all .3s; }
.adv-item:hover { box-shadow: var(--shadow-card); transform: translateY(-4px); }
.adv-item h3 { font-size: 17px; margin-bottom: 10px; padding-left: 14px; position: relative; }
.adv-item h3::before { content: ""; position: absolute; left: 0; top: 5px; bottom: 5px; width: 4px; border-radius: 4px; background: linear-gradient(180deg, var(--blue-600), var(--cyan-400)); }
.adv-item p { color: var(--text-600); font-size: 14.5px; }

/* ---------- 案例 ---------- */
.case-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.case-grid-3 { grid-template-columns: repeat(3, 1fr); }
.case-card { background: #fff; border: 1px solid var(--line-200); border-radius: var(--radius-lg); overflow: hidden; transition: all .3s; display: flex; flex-direction: column; }
.case-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.case-cover { display: block; overflow: hidden; }
.case-cover img { width: 100%; aspect-ratio: 16/9; object-fit: cover; transition: transform .4s; }
.case-card:hover .case-cover img { transform: scale(1.05); }
.case-body { padding: 22px 24px 26px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.case-tag { display: inline-block; width: fit-content; padding: 3px 12px; border-radius: 999px; background: #eef4ff; color: var(--blue-600); font-size: 12.5px; font-weight: 600; }
.case-body h2, .case-body h3 { font-size: 17px; line-height: 1.5; }
.case-body h2 a, .case-body h3 a { color: var(--text-900); }
.case-body h2 a:hover, .case-body h3 a:hover { color: var(--blue-600); }
.case-body p { color: var(--text-600); font-size: 14px; flex: 1; }
.case-meta { color: var(--text-400); font-size: 13px; }

/* ---------- 新闻 ---------- */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.news-card { background: #fff; border: 1px solid var(--line-200); border-radius: var(--radius-lg); padding: 26px 24px; transition: all .3s; display: flex; flex-direction: column; }
.news-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-card); }
.news-meta { display: flex; gap: 12px; align-items: center; font-size: 13px; color: var(--text-400); margin-bottom: 12px; }
.news-meta em { font-style: normal; color: var(--blue-600); background: #eef4ff; padding: 2px 10px; border-radius: 999px; font-weight: 600; }
.news-card h2, .news-card h3 { font-size: 16.5px; line-height: 1.55; margin-bottom: 10px; }
.news-card h2 a, .news-card h3 a { color: var(--text-900); }
.news-card h2 a:hover, .news-card h3 a:hover { color: var(--blue-600); }
.news-card p { color: var(--text-600); font-size: 14px; flex: 1; }

/* 新闻列表页 */
.news-list { max-width: 860px; margin: 0 auto; display: flex; flex-direction: column; gap: 18px; }
.news-item { background: #fff; border: 1px solid var(--line-200); border-radius: var(--radius-lg); padding: 26px 30px; transition: all .3s; }
.news-item:hover { box-shadow: var(--shadow-card); border-color: var(--blue-400); }
.news-item h2 { font-size: 18px; line-height: 1.5; margin-bottom: 8px; }
.news-item h2 a { color: var(--text-900); }
.news-item h2 a:hover { color: var(--blue-600); }
.news-item p { color: var(--text-600); font-size: 14.5px; margin-bottom: 10px; }

/* ---------- 服务列表页 ---------- */
.service-list { max-width: 900px; margin: 0 auto; display: flex; flex-direction: column; gap: 26px; }
.service-row { background: #fff; border: 1px solid var(--line-200); border-radius: var(--radius-lg); padding: 34px 36px; transition: all .3s; }
.service-row:hover { box-shadow: var(--shadow-card); border-color: var(--blue-400); }
.service-row h2 { font-size: 21px; margin-bottom: 6px; }
.service-row h2 a { color: var(--text-900); }
.service-row h2 a:hover { color: var(--blue-600); }
.service-kw { color: var(--blue-600); font-size: 13.5px; margin-bottom: 12px; }
.service-row > .service-row-body > p { color: var(--text-600); font-size: 14.5px; }
.service-highlights { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px 20px; margin: 16px 0 20px; }
.service-highlights li { color: var(--text-600); font-size: 14px; padding-left: 22px; position: relative; }
.service-highlights li::before { content: "✓"; position: absolute; left: 0; color: var(--cyan-400); font-weight: 700; }

/* ---------- 面包屑 / 页头 ---------- */
.breadcrumb { background: var(--bg-gray); border-bottom: 1px solid var(--line-200); padding: 12px 0; font-size: 13.5px; }
.breadcrumb .container { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; color: var(--text-400); }
.breadcrumb a { color: var(--text-600); }
.breadcrumb a:hover { color: var(--blue-600); }
.breadcrumb span { color: var(--text-400); }
.page-hero { background: radial-gradient(900px 320px at 30% -20%, #1a3a8f 0%, var(--navy-900) 60%); color: #fff; padding: 64px 0 70px; }
.page-hero h1 { font-size: 34px; font-weight: 800; letter-spacing: 1px; }
.page-hero p { color: rgba(255,255,255,.72); margin-top: 12px; max-width: 720px; }

/* ---------- 详情页 ---------- */
.detail-grid { display: grid; grid-template-columns: 1fr 300px; gap: 40px; align-items: start; }
.detail-head { margin-bottom: 28px; }
.detail-head h1 { font-size: 30px; line-height: 1.4; font-weight: 800; }
.detail-lead { color: var(--text-600); margin-top: 12px; font-size: 16px; }
.detail-figure { border-radius: var(--radius-lg); overflow: hidden; margin-bottom: 30px; box-shadow: var(--shadow-card); }
.detail-figure figcaption { text-align: center; color: var(--text-400); font-size: 13px; padding: 10px 0; }
.detail-body h2 { font-size: 21px; margin: 34px 0 14px; padding-left: 14px; position: relative; }
.detail-body h2::before { content: ""; position: absolute; left: 0; top: 6px; bottom: 6px; width: 4px; border-radius: 4px; background: linear-gradient(180deg, var(--blue-600), var(--cyan-400)); }
.detail-body p { color: var(--text-600); margin-bottom: 12px; font-size: 15.5px; }
.adv-list { display: flex; flex-direction: column; gap: 10px; margin-top: 8px; }
.adv-list li { color: var(--text-600); padding-left: 26px; position: relative; font-size: 15px; }
.adv-list li::before { content: "◆"; position: absolute; left: 4px; top: 1px; color: var(--blue-500); font-size: 12px; }
.tag-cloud { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 8px; }
.tag { padding: 5px 14px; background: #eef4ff; color: var(--blue-600); border-radius: 999px; font-size: 13px; font-weight: 500; }
.flow-list { counter-reset: flow; display: flex; flex-direction: column; gap: 12px; margin-top: 8px; }
.flow-list li { counter-increment: flow; position: relative; padding-left: 44px; color: var(--text-600); font-size: 15px; }
.flow-list li::before { content: counter(flow); position: absolute; left: 0; top: 2px; width: 28px; height: 28px; border-radius: 50%; background: linear-gradient(135deg, var(--blue-600), var(--cyan-400)); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 14px; font-weight: 700; }
/* ---------- 在线演示区块 ---------- */
.demo-box { margin: 34px 0 0; background: var(--bg-gray); border: 1px dashed var(--blue-400); border-radius: var(--radius-lg); padding: 26px 28px; }
.demo-box h2 { font-size: 18px; font-weight: 700; margin-bottom: 16px; padding-left: 12px; position: relative; }
.demo-box h2::before { content: ""; position: absolute; left: 0; top: 3px; bottom: 3px; width: 4px; border-radius: 4px; background: linear-gradient(180deg, var(--blue-600), var(--cyan-400)); }
.demo-links { display: flex; flex-wrap: wrap; gap: 12px; }
.demo-link {
    display: inline-flex; align-items: center; gap: 6px; padding: 10px 22px;
    background: #fff; border: 1.5px solid var(--blue-600); border-radius: 999px;
    color: var(--blue-600); font-size: 14px; font-weight: 600; transition: all .25s;
}
.demo-link:hover { background: var(--blue-600); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 18px rgba(37, 99, 235, .25); }
.demo-mini { display: inline-flex; align-items: center; gap: 6px; padding: 10px 20px; background: #fff; border: 1.5px dashed var(--line-200); border-radius: 999px; color: var(--text-600); font-size: 14px; }

.detail-cta { margin-top: 44px; background: linear-gradient(135deg, var(--navy-800), #1a3a8f); border-radius: var(--radius-lg); padding: 36px; color: #fff; }
.detail-cta h2 { font-size: 22px; margin-bottom: 8px; }
.detail-cta p { color: rgba(255,255,255,.75); margin-bottom: 18px; }
.detail-cta .cta-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* 侧边栏 */
.detail-aside { display: flex; flex-direction: column; gap: 22px; position: sticky; top: 92px; }
.aside-card { background: #fff; border: 1px solid var(--line-200); border-radius: var(--radius-lg); padding: 24px; }
.aside-card h3 { font-size: 16px; padding-bottom: 12px; border-bottom: 1px solid var(--line-200); margin-bottom: 14px; }
.aside-links { display: flex; flex-direction: column; }
.aside-links a { padding: 9px 12px; border-radius: var(--radius-sm); color: var(--text-600); font-size: 14.5px; }
.aside-links a:hover, .aside-links a.active { background: #eef4ff; color: var(--blue-600); }
.aside-links.aside-plain { gap: 2px; }
.aside-links.aside-plain a { padding: 8px 4px; border-bottom: 1px dashed var(--line-200); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.aside-contact { background: linear-gradient(150deg, var(--navy-800), #1a3a8f); border: 0; color: #fff; }
.aside-contact h3 { color: #fff; border-color: rgba(255,255,255,.2); }
.aside-contact p { color: rgba(255,255,255,.75); font-size: 14px; }
.aside-phone a { color: var(--cyan-300); font-size: 20px; font-weight: 700; }
.aside-time { font-size: 13px; }

/* ---------- 关于页 ---------- */
.about-wrap { max-width: 860px; margin: 0 auto; display: flex; flex-direction: column; gap: 40px; }
.about-block h2 { font-size: 22px; margin-bottom: 16px; padding-left: 14px; position: relative; }
.about-block h2::before { content: ""; position: absolute; left: 0; top: 6px; bottom: 6px; width: 4px; border-radius: 4px; background: linear-gradient(180deg, var(--blue-600), var(--cyan-400)); }
.about-block p { color: var(--text-600); font-size: 15.5px; }
.about-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.about-stats > div { background: linear-gradient(150deg, #eef4ff, #ecfeff); border-radius: var(--radius-lg); text-align: center; padding: 26px 12px; }
.about-stats strong { display: block; font-size: 30px; font-weight: 800; color: var(--blue-600); }
.about-stats span { color: var(--text-600); font-size: 13.5px; }
.timeline { display: flex; flex-direction: column; gap: 12px; }
.timeline li { color: var(--text-600); padding-left: 70px; position: relative; font-size: 15px; }
.timeline li strong { position: absolute; left: 0; color: var(--blue-600); font-size: 16px; }

/* ---------- 联系页 ---------- */
.contact-wrap { max-width: 960px; }
.contact-cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-bottom: 44px; }
.contact-card { background: #fff; border: 1px solid var(--line-200); border-radius: var(--radius-lg); padding: 26px 22px; transition: all .3s; }
.contact-card:hover { box-shadow: var(--shadow-card); }
.contact-card h2 { font-size: 16px; color: var(--text-400); font-weight: 600; margin-bottom: 10px; }
.contact-strong { font-size: 15.5px; font-weight: 700; color: var(--text-900); word-break: break-all; }
.contact-card > p:last-child { color: var(--text-400); font-size: 13px; margin-top: 6px; }
.contact-form-block { background: var(--bg-gray); border-radius: var(--radius-lg); padding: 40px; max-width: 640px; margin: 0 auto; }
.contact-form-block h2 { font-size: 22px; margin-bottom: 8px; }
.contact-form-tip { color: var(--text-600); font-size: 14px; margin-bottom: 24px; }
.form-row { margin-bottom: 18px; }
.form-row label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 8px; color: var(--text-900); }
.form-row label span { color: #e5484d; }
.form-row input, .form-row textarea {
    width: 100%; padding: 12px 14px; border: 1.5px solid var(--line-200);
    border-radius: var(--radius-sm); font-size: 14.5px; font-family: inherit;
    transition: border-color .2s; background: #fff;
}
.form-row input:focus, .form-row textarea:focus { outline: none; border-color: var(--blue-500); }
.form-privacy { color: var(--text-400); font-size: 12.5px; margin-top: 12px; text-align: center; }

/* ---------- CTA 横幅 ---------- */
.cta-band { background: linear-gradient(120deg, var(--navy-800) 0%, #16307a 60%, #0e5a8a 100%); color: #fff; padding: 60px 0; }
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.cta-inner h2 { font-size: 28px; font-weight: 800; }
.cta-inner p { color: rgba(255,255,255,.75); margin-top: 8px; }
.cta-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--navy-900); color: rgba(255,255,255,.72); font-size: 14px; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 40px; padding: 60px 0 44px; }
.footer-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer-logo img { width: 44px; height: 44px; border-radius: 10px; }
.footer-logo strong { color: #fff; font-size: 16px; }
.footer-desc { font-size: 13.5px; line-height: 1.9; margin-bottom: 18px; }
.footer-contact li { display: flex; gap: 10px; margin-bottom: 8px; font-size: 13.5px; }
.footer-contact span { color: rgba(255,255,255,.45); flex-shrink: 0; }
.footer-contact a { color: rgba(255,255,255,.85); }
.footer-col h3 { color: #fff; font-size: 15.5px; margin-bottom: 18px; padding-bottom: 10px; border-bottom: 1px solid rgba(255,255,255,.1); }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a { color: rgba(255,255,255,.62); font-size: 14px; }
.footer-col ul a:hover { color: var(--cyan-300); }
.footer-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 22px; }
.footer-tags a { padding: 4px 12px; background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.1); border-radius: 999px; color: rgba(255,255,255,.65); font-size: 12.5px; }
.footer-tags a:hover { color: var(--cyan-300); border-color: var(--cyan-300); }
.footer-wechat span { display: block; font-size: 13px; color: rgba(255,255,255,.45); margin-bottom: 4px; }
.footer-wechat strong { color: var(--cyan-300); letter-spacing: 1px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding: 20px 0; text-align: center; font-size: 13px; color: rgba(255,255,255,.45); }
.footer-bottom a { color: rgba(255,255,255,.55); }
.footer-bottom a:hover { color: var(--cyan-300); }

/* ---------- 筛选条 / 空态 / 错误页 ---------- */
.filter-bar { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-bottom: 36px; }
.filter-bar a { padding: 8px 22px; border-radius: 999px; border: 1px solid var(--line-200); color: var(--text-600); font-size: 14.5px; background: #fff; }
.filter-bar a:hover { border-color: var(--blue-500); color: var(--blue-600); }
.filter-bar a.active { background: linear-gradient(135deg, var(--blue-600), var(--cyan-400)); color: #fff; border-color: transparent; }
.empty-tip { text-align: center; color: var(--text-400); padding: 60px 0; }
.error-page { min-height: 100vh; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 18px; background: var(--navy-900); color: #fff; text-align: center; padding: 24px; }
.error-page h1 { font-size: 96px; font-weight: 800; background: linear-gradient(90deg, var(--blue-400), var(--cyan-300)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.error-page p { color: rgba(255,255,255,.7); }
.error-links { display: flex; gap: 14px; margin-top: 10px; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
    .hero-inner { grid-template-columns: 1fr; padding: 64px 20px 72px; }
    .hero-art { display: none; }
    .service-grid, .news-grid { grid-template-columns: repeat(2, 1fr); }
    .adv-grid { grid-template-columns: repeat(2, 1fr); }
    .case-grid, .case-grid-3 { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
    .detail-grid { grid-template-columns: 1fr; }
    .detail-aside { position: static; }
    .contact-cards { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .main-nav { position: fixed; top: 72px; left: 0; right: 0; background: var(--navy-900); padding: 10px 20px 20px; display: none; box-shadow: 0 20px 40px rgba(0,0,0,.3); }
    .main-nav.open { display: block; }
    .main-nav ul { flex-direction: column; gap: 4px; }
    .main-nav a { padding: 12px 16px; }
    .nav-toggle { display: block; margin-left: auto; }
    .header-cta { display: none; }
    .header-inner { gap: 12px; }
    .hero h1 { font-size: 30px; }
    .hero-stats { gap: 26px; }
    .section { padding: 56px 0; }
    .section-head h2 { font-size: 25px; }
    .service-grid, .adv-grid, .case-grid, .case-grid-3, .news-grid, .about-stats, .contact-cards { grid-template-columns: 1fr; }
    .page-hero { padding: 44px 0 50px; }
    .page-hero h1 { font-size: 26px; }
    .detail-head h1 { font-size: 24px; }
    .service-highlights { grid-template-columns: 1fr; }
    .service-row { padding: 26px 22px; }
    .cta-inner { flex-direction: column; text-align: center; }
    .contact-form-block { padding: 28px 22px; }
    .footer-grid { grid-template-columns: 1fr; gap: 30px; padding: 44px 0 32px; }
}