/* ==========================================================================
   024icp.com.cn 新版样式表 — 现代简约商务风 / 响应式
   Author: Trae  |  License: MIT
   Breakpoints: 992 / 768 / 480
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root {
    --c-primary:        #0a3d91;
    --c-primary-dark:  #072b66;
    --c-primary-light: #2563c9;
    --c-accent:        #ff8c1a;
    --c-accent-dark:   #e07300;
    --c-text:          #1a1f2c;
    --c-text-muted:    #5b6577;
    --c-text-light:    #8892a6;
    --c-bg:            #ffffff;
    --c-bg-soft:       #f5f7fb;
    --c-bg-dark:       #0f1729;
    --c-border:        #e1e6ee;
    --c-shadow-sm:     0 1px 3px rgba(15,23,41,.06), 0 1px 2px rgba(15,23,41,.04);
    --c-shadow:        0 4px 16px rgba(15,23,41,.08);
    --c-shadow-lg:     0 12px 40px rgba(10,61,145,.12);
    --radius:          12px;
    --radius-sm:       8px;
    --radius-lg:       20px;
    --container:       1240px;
    --header-h:        76px;
    --font:            "PingFang SC","Microsoft YaHei","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;
    --transition:      all .25s cubic-bezier(.4,0,.2,1);
}

/* ---------- 2. 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.7;
    color: var(--c-text);
    background: var(--c-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
h1,h2,h3,h4,h5,h6 { margin: 0 0 .5em; font-weight: 700; line-height: 1.3; color: var(--c-text); }
p { margin: 0 0 1em; }
a { color: var(--c-primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--c-primary-light); }
img { max-width: 100%; height: auto; display: block; }
ul,ol { margin: 0 0 1em; padding-left: 1.25em; }
li { margin-bottom: .4em; }
table { width: 100%; border-collapse: collapse; }
button { font-family: inherit; cursor: pointer; border: 0; background: none; }
:focus-visible { outline: 2px solid var(--c-primary-light); outline-offset: 2px; }

/* ---------- 3. 布局工具类 ---------- */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-soft { background: var(--c-bg-soft); }
.section-dark { background: var(--c-bg-dark); color: #e8edf6; }
.section-dark h2, .section-dark h3 { color: #fff; }
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2,1fr); }
.grid-3 { grid-template-columns: repeat(3,1fr); }
.grid-4 { grid-template-columns: repeat(4,1fr); }
.text-center { text-align: center; }
.text-muted  { color: var(--c-text-muted); }
.text-small  { font-size: 14px; }

/* ---------- 4. 排版 ---------- */
.section-title {
    font-size: clamp(26px, 4vw, 38px);
    font-weight: 800;
    text-align: center;
    margin-bottom: 12px;
    letter-spacing: -.5px;
}
.section-subtitle {
    text-align: center;
    color: var(--c-text-muted);
    font-size: 16px;
    margin-bottom: 48px;
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
}
.section-dark .section-subtitle { color: #a9b8d8; }

/* ---------- 5. 按钮 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    font-size: 16px;
    font-weight: 600;
    transition: var(--transition);
    white-space: nowrap;
    border: 2px solid transparent;
}
.btn-primary { background: var(--c-primary); color: #fff; }
.btn-primary:hover { background: var(--c-primary-dark); color: #fff; transform: translateY(-2px); box-shadow: var(--c-shadow-lg); }
.btn-accent { background: var(--c-accent); color: #fff; }
.btn-accent:hover { background: var(--c-accent-dark); color: #fff; transform: translateY(-2px); }
.btn-outline { border-color: var(--c-primary); color: var(--c-primary); background: transparent; }
.btn-outline:hover { background: var(--c-primary); color: #fff; }
.btn-lg { padding: 14px 36px; font-size: 17px; }
.btn-block { width: 100%; display: flex; }

/* ---------- 6. 顶部公告条 ---------- */
.topbar { background: var(--c-bg-dark); color: #c8d2e6; font-size: 13px; padding: 8px 0; }
.topbar .container { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.topbar a { color: #c8d2e6; }
.topbar a:hover { color: #fff; }
.topbar-info { display: flex; gap: 20px; flex-wrap: wrap; }
.topbar-info span { display: inline-flex; align-items: center; gap: 6px; }

/* ---------- 7. 头部 / 导航 ---------- */
.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: #fff;
    box-shadow: var(--c-shadow-sm);
    height: var(--header-h);
    display: flex;
    align-items: center;
}
.header .container { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.logo { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.logo-mark {
    width: 44px; height: 44px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--c-primary), var(--c-primary-light));
    display: grid; place-items: center;
    color: #fff; font-weight: 800; font-size: 18px; letter-spacing: 1px;
}
.logo-text { display: flex; flex-direction: column; line-height: 1.2; }
.logo-text strong { font-size: 18px; color: var(--c-text); }
.logo-text small { font-size: 12px; color: var(--c-text-muted); }
.logo-img { height: 44px; width: auto; display: block; }
.footer .logo-img { background: #fff; border-radius: 8px; padding: 4px 10px; height: 36px; box-sizing: content-box; }

.main-nav { display: flex; align-items: center; gap: 2px; list-style: none; margin: 0; padding: 0; }
.main-nav > li { position: relative; }
.main-nav > li > a {
    display: flex; align-items: center;
    padding: 8px 12px;
    color: var(--c-text);
    font-size: 14px;
    font-weight: 600;
    border-radius: var(--radius-sm);
}
.main-nav > li > a:hover,
.main-nav > li.active > a { color: var(--c-primary); background: rgba(10,61,145,.08); }
.main-nav .has-sub > a::after {
    content: ""; display: inline-block;
    width: 8px; height: 8px;
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    transform: rotate(45deg);
    margin-left: 8px;
    transition: var(--transition);
}
.main-nav .has-sub:hover > a::after { transform: rotate(225deg); }

.sub-menu {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    min-width: 220px;
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--c-shadow-lg);
    padding: 8px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
    list-style: none;
    margin: 0;
}
.main-nav .has-sub:hover .sub-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.sub-menu a {
    display: block;
    padding: 9px 14px;
    border-radius: var(--radius-sm);
    color: var(--c-text);
    font-size: 14px;
    font-weight: 500;
}
.sub-menu a:hover { background: var(--c-bg-soft); color: var(--c-primary); }

.header-cta { display: flex; align-items: center; gap: 14px; }
.header-phone { color: var(--c-primary); font-weight: 700; font-size: 18px; white-space: nowrap; }
.menu-toggle { display: none; }

/* ---------- 8. Hero 主视觉 ---------- */
.hero {
    position: relative;
    background: linear-gradient(135deg, #0a3d91 0%, #072b66 50%, #0f1c3d 100%);
    color: #fff;
    padding: 90px 0 100px;
    overflow: hidden;
}
.hero::before {
    content: "";
    position: absolute; inset: 0;
    background-image:
        radial-gradient(circle at 20% 30%, rgba(255,140,26,.15) 0, transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(37,99,201,.25) 0, transparent 45%);
    pointer-events: none;
}
.hero .container { position: relative; display: grid; grid-template-columns: 1.2fr .8fr; gap: 48px; align-items: center; }
.hero-eyebrow {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(255,140,26,.18);
    color: #ffb87a;
    border-radius: 100px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 18px;
    letter-spacing: 1px;
}
.hero h1 {
    color: #fff;
    font-size: clamp(30px, 5vw, 50px);
    line-height: 1.2;
    margin-bottom: 20px;
    letter-spacing: -1px;
}
.hero h1 .hl { color: #ffb87a; }
.hero p { font-size: 17px; color: #c8d2e6; margin-bottom: 32px; max-width: 580px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-stats { display: grid; grid-template-columns: repeat(2,1fr); gap: 24px; margin-top: 48px; max-width: 580px; }
.hero-stat-num { font-size: 32px; font-weight: 800; color: #ffb87a; }
.hero-stat-label { font-size: 13px; color: #a9b8d8; }

.hero-card {
    background: rgba(255,255,255,.08);
    border: 1px solid rgba(255,255,255,.15);
    border-radius: var(--radius-lg);
    padding: 32px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}
.hero-card h3 { color: #fff; font-size: 20px; margin-bottom: 20px; }
.hero-card ul { list-style: none; padding: 0; margin: 0; }
.hero-card li {
    display: flex; align-items: flex-start; gap: 10px;
    padding: 10px 0;
    border-bottom: 1px dashed rgba(255,255,255,.12);
    color: #e8edf6;
    font-size: 14px;
}
.hero-card li:last-child { border-bottom: 0; }
.hero-card li::before { content: "✓"; color: #ffb87a; font-weight: 800; flex-shrink: 0; }

/* ---------- 9. 服务卡片网格 ---------- */
.services-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.service-card {
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    padding: 32px 28px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}
.service-card::before {
    content: ""; position: absolute; top: 0; left: 0;
    width: 100%; height: 4px;
    background: linear-gradient(90deg, var(--c-primary), var(--c-primary-light));
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
}
.service-card:hover { transform: translateY(-6px); box-shadow: var(--c-shadow-lg); border-color: transparent; }
.service-card:hover::before { transform: scaleX(1); }
.service-icon {
    width: 56px; height: 56px;
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(10,61,145,.1), rgba(37,99,201,.15));
    color: var(--c-primary);
    display: grid; place-items: center;
    margin-bottom: 20px;
    font-size: 26px;
}
.service-card h3 { font-size: 20px; margin-bottom: 10px; }
.service-card p { color: var(--c-text-muted); font-size: 14px; margin-bottom: 16px; }
.service-card .tag-list { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.service-card .tag { padding: 4px 10px; background: var(--c-bg-soft); color: var(--c-text-muted); border-radius: 100px; font-size: 12px; }
.service-card .more-link { font-weight: 600; font-size: 14px; display: inline-flex; align-items: center; gap: 6px; }
.service-card .more-link::after { content: "→"; transition: var(--transition); }
.service-card:hover .more-link::after { transform: translateX(4px); }

/* ---------- 10. 流程时间轴 ---------- */
.process-list { display: grid; grid-template-columns: repeat(7,1fr); gap: 16px; counter-reset: step; }
.process-item { text-align: center; position: relative; padding: 24px 12px; }
.process-item::before {
    counter-increment: step;
    content: counter(step);
    display: grid; place-items: center;
    width: 52px; height: 52px;
    margin: 0 auto 16px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--c-primary), var(--c-primary-light));
    color: #fff; font-weight: 800; font-size: 20px;
    box-shadow: 0 8px 20px rgba(10,61,145,.25);
}
.process-item h4 { font-size: 16px; margin-bottom: 6px; }
.process-item p { font-size: 13px; color: var(--c-text-muted); margin: 0; }

/* ---------- 11. 优势 / 特性 ---------- */
.features-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; }
.feature-item {
    text-align: center;
    padding: 32px 20px;
    border-radius: var(--radius);
    background: #fff;
    border: 1px solid var(--c-border);
    transition: var(--transition);
}
.feature-item:hover { transform: translateY(-4px); box-shadow: var(--c-shadow); }
.feature-icon {
    width: 64px; height: 64px;
    margin: 0 auto 18px;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--c-primary), var(--c-primary-light));
    color: #fff;
    display: grid; place-items: center;
    font-size: 28px;
}
.feature-item h3 { font-size: 18px; }
.feature-item p { color: var(--c-text-muted); font-size: 14px; margin: 0; }

/* ---------- 12. 资质展示 ---------- */
.cert-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; }
.cert-card {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--c-border);
    transition: var(--transition);
}
.cert-card:hover { box-shadow: var(--c-shadow); transform: translateY(-4px); }
.cert-img {
    aspect-ratio: 3 / 4;
    background: var(--c-bg-soft);
    display: grid; place-items: center;
    color: var(--c-text-light);
    font-size: 14px;
    padding: 24px;
}
.cert-img img { width: 100%; height: 100%; object-fit: contain; }
.cert-body { padding: 16px 20px; text-align: center; }
.cert-body h4 { font-size: 15px; margin: 0; }

/* ---------- 13. 新闻 / 公告列表 ---------- */
.news-layout { display: grid; grid-template-columns: 1.5fr 1fr; gap: 40px; }
.news-list { list-style: none; padding: 0; margin: 0; }
.news-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 0;
    border-bottom: 1px solid var(--c-border);
    gap: 16px;
}
.news-list li:last-child { border-bottom: 0; }
.news-list a { color: var(--c-text); flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.news-list a:hover { color: var(--c-primary); }
.news-list .date { color: var(--c-text-light); font-size: 13px; flex-shrink: 0; }
.news-block { background: #fff; border-radius: var(--radius); border: 1px solid var(--c-border); overflow: hidden; }
.news-block-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 16px 24px;
    background: var(--c-bg-soft);
    border-bottom: 1px solid var(--c-border);
}
.news-block-header h3 { margin: 0; font-size: 18px; }
.news-block-header a { font-size: 13px; }
.news-block-body { padding: 8px 24px; }

/* ---------- 14. FAQ 常见问题 ---------- */
.faq-list { max-width: 900px; margin: 0 auto; }
.faq-item {
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    margin-bottom: 16px;
    overflow: hidden;
}
.faq-q {
    width: 100%; text-align: left;
    padding: 18px 24px;
    font-size: 16px; font-weight: 600;
    display: flex; justify-content: space-between; align-items: center; gap: 16px;
    color: var(--c-text);
}
.faq-q::after { content: "+"; font-size: 24px; color: var(--c-primary); transition: var(--transition); }
.faq-item.open .faq-q::after { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .3s ease; padding: 0 24px; color: var(--c-text-muted); }
.faq-item.open .faq-a { max-height: 400px; padding-bottom: 20px; }

/* ---------- 15. CTA 行动召唤 ---------- */
.cta-band {
    background: linear-gradient(135deg, var(--c-primary), var(--c-primary-dark));
    color: #fff;
    border-radius: var(--radius-lg);
    padding: 48px 56px;
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    align-items: center;
    gap: 32px;
    position: relative;
    overflow: hidden;
}
.cta-band::before {
    content: ""; position: absolute; inset: 0;
    background: radial-gradient(circle at 90% 20%, rgba(255,140,26,.2), transparent 50%);
}
.cta-band h2 { color: #fff; font-size: 28px; margin-bottom: 8px; position: relative; }
.cta-band p { color: #c8d2e6; margin: 0; position: relative; }
.cta-band .hero-actions { justify-content: flex-end; position: relative; }

/* ---------- 16. 业务详情页 (内页通用) ---------- */
.page-hero {
    background: linear-gradient(135deg, #0a3d91, #072b66);
    color: #fff;
    padding: 56px 0;
    position: relative;
    overflow: hidden;
}
.page-hero::before {
    content: ""; position: absolute; inset: 0;
    background-image: radial-gradient(circle at 80% 50%, rgba(255,140,26,.12), transparent 40%);
}
.page-hero .container { position: relative; }
.page-hero h1 { color: #fff; font-size: clamp(26px, 4vw, 38px); margin-bottom: 12px; }
.page-hero p { color: #c8d2e6; font-size: 16px; max-width: 720px; margin: 0; }
.breadcrumb { font-size: 13px; color: #a9b8d8; margin-bottom: 18px; }
.breadcrumb a { color: #a9b8d8; }
.breadcrumb a:hover { color: #fff; }
.breadcrumb .sep { margin: 0 8px; opacity: .6; }

.page-layout { display: grid; grid-template-columns: 240px 1fr; gap: 40px; padding: 56px 0; }
.page-sidebar { position: sticky; top: calc(var(--header-h) + 24px); align-self: start; }
.sidebar-title {
    font-size: 18px; font-weight: 700; color: var(--c-primary);
    padding: 16px 20px;
    background: var(--c-bg-soft);
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    border-left: 4px solid var(--c-accent);
}
.sidebar-nav { background: #fff; border: 1px solid var(--c-border); border-top: 0; border-radius: 0 0 var(--radius-sm) var(--radius-sm); overflow: hidden; }
.sidebar-nav a {
    display: block;
    padding: 12px 20px;
    color: var(--c-text);
    font-size: 14px;
    border-bottom: 1px solid var(--c-border);
    transition: var(--transition);
}
.sidebar-nav a:last-child { border-bottom: 0; }
.sidebar-nav a:hover, .sidebar-nav a.active { background: var(--c-bg-soft); color: var(--c-primary); padding-left: 26px; }
.sidebar-contact {
    margin-top: 24px;
    background: linear-gradient(135deg, var(--c-primary), var(--c-primary-dark));
    color: #fff;
    border-radius: var(--radius);
    padding: 24px;
}
.sidebar-contact h4 { color: #fff; margin-bottom: 12px; }
.sidebar-contact p { color: #c8d2e6; font-size: 14px; margin: 0 0 8px; }
.sidebar-contact .phone { font-size: 22px; font-weight: 800; color: #ffb87a; }

.page-content { min-width: 0; }
.content-block { margin-bottom: 48px; }
.content-block h2 {
    font-size: 24px; margin-bottom: 16px; padding-bottom: 12px;
    border-bottom: 2px solid var(--c-border);
    position: relative;
}
.content-block h2::before {
    content: ""; position: absolute; bottom: -2px; left: 0;
    width: 60px; height: 2px; background: var(--c-primary);
}
.content-block h3 { font-size: 18px; margin-top: 24px; color: var(--c-primary); }
.content-block p, .content-block li { color: var(--c-text); line-height: 1.85; }
.content-block ul { padding-left: 1.4em; }
.content-block ul li { margin-bottom: .6em; }
.content-block .lead {
    font-size: 17px;
    color: var(--c-text-muted);
    padding: 20px 24px;
    background: var(--c-bg-soft);
    border-radius: var(--radius);
    border-left: 4px solid var(--c-primary);
}

.sub-services-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; margin-top: 24px; }
.sub-service-card {
    padding: 24px;
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    transition: var(--transition);
}
.sub-service-card:hover { box-shadow: var(--c-shadow); border-color: var(--c-primary-light); transform: translateY(-3px); }
.sub-service-card .num {
    width: 32px; height: 32px;
    border-radius: 50%;
    background: var(--c-primary);
    color: #fff;
    display: grid; place-items: center;
    font-weight: 700; margin-bottom: 14px;
}
.sub-service-card h4 { font-size: 16px; margin-bottom: 8px; }
.sub-service-card p { font-size: 13px; color: var(--c-text-muted); margin: 0; }

.material-list {
    display: grid; grid-template-columns: repeat(2,1fr); gap: 12px;
    list-style: none; padding: 0; counter-reset: mat;
}
.material-list li {
    counter-increment: mat;
    padding: 14px 18px 14px 48px;
    background: var(--c-bg-soft);
    border-radius: var(--radius-sm);
    position: relative;
    font-size: 14px;
    margin: 0;
}
.material-list li::before {
    content: counter(mat);
    position: absolute; left: 14px; top: 50%; transform: translateY(-50%);
    width: 22px; height: 22px;
    background: var(--c-primary); color: #fff;
    border-radius: 50%; display: grid; place-items: center;
    font-size: 12px; font-weight: 700;
}
.condition-badges { display: flex; flex-wrap: wrap; gap: 12px; margin: 20px 0; }
.condition-badge {
    padding: 8px 16px;
    background: rgba(10,61,145,.08);
    color: var(--c-primary);
    border-radius: 100px;
    font-size: 14px; font-weight: 600;
}

/* ---------- 17. 关于我们 / 联系页 ---------- */
.about-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 48px; align-items: center; }
.about-text p { color: var(--c-text); margin-bottom: 18px; }
.about-text .quote {
    font-size: 20px; font-weight: 700; color: var(--c-primary);
    padding: 20px 0 20px 24px;
    border-left: 4px solid var(--c-accent);
    margin: 24px 0;
}
.about-stats { display: grid; grid-template-columns: repeat(2,1fr); gap: 24px; }
.about-stat {
    background: linear-gradient(135deg, var(--c-primary), var(--c-primary-dark));
    color: #fff;
    border-radius: var(--radius);
    padding: 28px;
    text-align: center;
}
.about-stat .num { font-size: 36px; font-weight: 800; color: #ffb87a; }
.about-stat .label { font-size: 14px; color: #c8d2e6; }

.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.contact-info h3 { font-size: 20px; margin-bottom: 20px; color: var(--c-primary); }
.contact-list { list-style: none; padding: 0; margin: 0 0 32px; }
.contact-list li {
    display: flex; align-items: flex-start; gap: 14px;
    padding: 16px 0;
    border-bottom: 1px solid var(--c-border);
    margin: 0;
}
.contact-list .ic {
    width: 40px; height: 40px;
    border-radius: 10px;
    background: rgba(10,61,145,.08);
    color: var(--c-primary);
    display: grid; place-items: center;
    flex-shrink: 0; font-size: 18px;
}
.contact-list .lbl { font-size: 13px; color: var(--c-text-muted); margin-bottom: 2px; }
.contact-list .val { font-size: 16px; font-weight: 600; color: var(--c-text); }
.contact-list .val a { color: var(--c-text); }
.contact-form {
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    padding: 32px;
    box-shadow: var(--c-shadow);
}
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 8px; }
.form-group input, .form-group textarea, .form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--c-border);
    border-radius: var(--radius-sm);
    font-size: 15px; font-family: inherit;
    background: #fff;
    transition: var(--transition);
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
    outline: none; border-color: var(--c-primary);
    box-shadow: 0 0 0 3px rgba(10,61,145,.12);
}
.form-group textarea { resize: vertical; min-height: 120px; }

/* ---------- 18. 页脚 ---------- */
.footer { background: var(--c-bg-dark); color: #a9b8d8; padding: 64px 0 0; }
.footer-grid {
    display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 40px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer-brand .logo-text strong { color: #fff; }
.footer-brand p { font-size: 14px; line-height: 1.8; margin-top: 16px; }
.footer h4 { color: #fff; font-size: 16px; margin-bottom: 18px; }
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { color: #a9b8d8; font-size: 14px; }
.footer-links a:hover { color: #fff; padding-left: 4px; }
.footer-contact p { font-size: 14px; margin-bottom: 10px; }
.footer-contact .phone { color: #ffb87a; font-size: 22px; font-weight: 800; }
.footer-bottom { padding: 24px 0; font-size: 13px; text-align: center; color: #6c7a99; }
.footer-bottom a { color: #6c7a99; }
.footer-bottom a:hover { color: #fff; }
.gov-badge { display: inline-block; width: 64px; height: auto; vertical-align: middle; margin-left: 12px; }

.float-contact {
    position: fixed; right: 24px; bottom: 80px; z-index: 900;
    display: flex; flex-direction: column; gap: 12px;
}
.float-btn {
    width: 52px; height: 52px;
    border-radius: 50%;
    background: var(--c-primary);
    color: #fff;
    display: grid; place-items: center;
    font-size: 22px;
    box-shadow: var(--c-shadow-lg);
    transition: var(--transition);
}
.float-btn:hover { background: var(--c-primary-dark); transform: scale(1.08); }
.float-btn.accent { background: var(--c-accent); }
.float-btn.accent:hover { background: var(--c-accent-dark); }

#backToTop {
    position: fixed; right: 24px; bottom: 24px;
    width: 44px; height: 44px;
    border-radius: 50%;
    background: rgba(15,23,41,.6);
    color: #fff;
    display: grid; place-items: center;
    font-size: 20px;
    opacity: 0; visibility: hidden;
    transition: var(--transition);
    z-index: 900;
}
#backToTop.show { opacity: 1; visibility: visible; }
#backToTop:hover { background: var(--c-primary); }

/* ==========================================================================
   响应式: 平板
   ========================================================================== */
@media (max-width: 992px) {
    .hero .container { grid-template-columns: 1fr; }
    .hero-card { max-width: 540px; }
    .services-grid, .features-grid, .cert-grid { grid-template-columns: repeat(2,1fr); }
    .process-list { grid-template-columns: repeat(4,1fr); }
    .news-layout { grid-template-columns: 1fr; }
    .page-layout { grid-template-columns: 1fr; }
    .page-sidebar { position: static; }
    .about-grid, .contact-grid, .cta-band { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .sub-services-grid { grid-template-columns: repeat(2,1fr); }
    .material-list { grid-template-columns: 1fr; }
    .topbar-info span:nth-child(n+3) { display: none; }
}

/* ==========================================================================
   响应式: 移动端
   ========================================================================== */
@media (max-width: 768px) {
    :root { --header-h: 64px; }
    .section { padding: 56px 0; }
    .container { padding: 0 16px; }

    .menu-toggle {
        display: flex; flex-direction: column; justify-content: center; gap: 5px;
        width: 40px; height: 40px; padding: 8px;
        border-radius: var(--radius-sm);
    }
    .menu-toggle span { display: block; width: 24px; height: 2px; background: var(--c-text); transition: var(--transition); border-radius: 2px; }
    .menu-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
    .menu-toggle.active span:nth-child(2) { opacity: 0; }
    .menu-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

    .main-nav {
        position: fixed; top: var(--header-h); left: 0; right: 0;
        background: #fff;
        flex-direction: column; align-items: stretch; gap: 0;
        max-height: 0; overflow: hidden;
        transition: max-height .35s ease;
        box-shadow: var(--c-shadow);
    }
    .main-nav.open { max-height: calc(100vh - var(--header-h)); overflow-y: auto; }
    .main-nav > li { border-bottom: 1px solid var(--c-border); }
    .main-nav > li > a { padding: 14px 20px; }
    .main-nav .has-sub > a::after { display: none; }
    .sub-menu {
        position: static; opacity: 1; visibility: visible; transform: none;
        box-shadow: none; background: var(--c-bg-soft);
        padding: 4px 0 4px 20px;
        max-height: 0; overflow: hidden;
        transition: max-height .3s ease;
    }
    .main-nav .has-sub.expanded .sub-menu { max-height: 600px; }
    .sub-menu a { padding: 10px 16px; }

    .header-phone { display: none; }
    .header-cta .btn { padding: 8px 16px; font-size: 14px; }

    .hero { padding: 56px 0 64px; }
    .hero-stats { grid-template-columns: 1fr 1fr; gap: 16px; }

    .services-grid, .features-grid, .cert-grid,
    .grid-2, .grid-3, .grid-4, .sub-services-grid, .about-stats { grid-template-columns: 1fr; }
    .process-list { grid-template-columns: repeat(2,1fr); gap: 12px; }

    .cta-band { padding: 32px 24px; }
    .cta-band .hero-actions { justify-content: flex-start; }

    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .float-contact { right: 16px; bottom: 70px; }
    #backToTop { right: 16px; }
    .topbar { display: none; }

    .page-hero { padding: 40px 0; }
    .contact-form { padding: 24px; }
}

@media (max-width: 480px) {
    .hero-actions { flex-direction: column; align-items: stretch; }
    .hero-actions .btn { width: 100%; }
    .hero-stats { grid-template-columns: 1fr; }
    .process-list { grid-template-columns: 1fr; }
}

@media print {
    .header, .float-contact, #backToTop, .topbar, .menu-toggle, .hero-actions, .cta-band { display: none; }
    body { color: #000; }
    a { color: #000; text-decoration: underline; }
}