:root {
    --primary: #16a06a;
    --primary-dark: #0f7f54;
    --accent: #34c78f;
    --text: #22313a;
    --muted: #6b7c8a;
    --bg: #ffffff;
    --bg-soft: #f4faf7;
    --border: #e5efe9;
    --radius: 16px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* 顶部导航 */
header {
    position: sticky; top: 0; z-index: 100;
    background: rgba(255,255,255,.92); backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
}
.nav {
    display: flex; align-items: center; justify-content: space-between;
    height: 68px;
}
.logo { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 700; }
.logo .mark {
    width: 36px; height: 36px; border-radius: 10px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    display: flex; align-items: center; justify-content: center;
    color: #fff; font-size: 20px; font-weight: 700;
}
.nav-links { display: flex; align-items: center; gap: 30px; margin-left: auto; }
.nav-links a { color: var(--muted); font-size: 15px; transition: color .2s; }
.nav-links a:hover { color: var(--primary); }
.nav-actions { display: flex; align-items: center; gap: 12px; margin-left: 30px; }
.nav-login {
    color: var(--primary); padding: 8px 18px; border-radius: 999px;
    border: 1px solid var(--primary); font-size: 14px; background: #fff;
    transition: all .2s;
}
.nav-login:hover { background: var(--primary); color: #fff; }
.nav-cta {
    background: var(--primary); color: #fff; padding: 9px 20px; border-radius: 999px;
    font-size: 14px; transition: background .2s;
}
.nav-cta:hover { background: var(--primary-dark); }

/* 顶部用户名 hover 个人信息卡 */
.user-menu { position: relative; }
.user-name { cursor: pointer; display: inline-flex; align-items: center; gap: 6px; padding: 6px 10px; border-radius: 6px; color: var(--text); font-size: 14px; }
.user-name:hover { background: var(--bg-soft); }
.user-name .avatar { width: 26px; height: 26px; border-radius: 50%; background: var(--primary); color: #fff; font-size: 14px; font-weight: 700; display: flex; align-items: center; justify-content: center; }
.user-name .caret { display: inline-flex; align-items: center; font-size: 11px; opacity: .85; transition: transform .15s; }
.user-menu:hover .caret { transform: rotate(180deg); }
.user-dropdown { position: absolute; top: 100%; right: 0; padding-top: 8px; opacity: 0; visibility: hidden; transform: translateY(6px); transition: opacity .18s, transform .18s, visibility .18s; z-index: 30; }
.user-menu:hover .user-dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.user-dropdown-inner { background: #fff; color: var(--text); border-radius: 10px; box-shadow: 0 12px 40px rgba(0,0,0,.18); width: 300px; overflow: hidden; text-align: left; border: 1px solid var(--border); }
.ud-head { padding: 14px 16px; border-bottom: 1px solid var(--border); }
.ud-name { font-size: 15px; font-weight: 700; color: var(--text); }
.ud-badge { display: inline-block; margin-top: 6px; padding: 2px 10px; border-radius: 999px; font-size: 12px; background: var(--bg-soft); color: var(--primary-dark); }
.ud-rows { padding: 8px 16px; }
.ud-row { display: flex; justify-content: space-between; gap: 12px; padding: 7px 0; font-size: 13px; }
.ud-label { color: var(--muted); }
.ud-val { color: var(--text); text-align: right; }
.ud-plan-tag { display: inline-block; margin: 2px 2px 0 0; padding: 2px 8px; border-radius: 999px; font-size: 12px; background: var(--bg-soft); color: var(--primary-dark); }
.ud-actions { display: flex; border-top: 1px solid var(--border); }
.ud-actions a { flex: 1; text-align: center; padding: 12px 0; color: var(--primary); }
.ud-actions a:hover { background: var(--bg-soft); }
.ud-actions a + a { border-left: 1px solid var(--border); }

/* Hero */
.hero {
    position: relative; overflow: hidden;
    background: linear-gradient(135deg, rgba(22,160,106,0.06) 0%, rgba(52,199,143,0.10) 100%);
    text-align: center; padding: 96px 0;
}
.hero-content { max-width: 900px; margin: 0 auto; }
.hero h1 { font-size: 48px; line-height: 1.2; margin: 0 0 20px; font-weight: 800; color: var(--text); }
.hero h1 .highlight {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero p { font-size: 20px; color: var(--muted); margin: 0 auto 36px; max-width: 640px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; }
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 14px 32px; border-radius: 999px; font-size: 16px; font-weight: 600;
    border: none; font-family: inherit;
    transition: transform .15s, box-shadow .15s, background .2s; cursor: pointer;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 10px 24px rgba(22,160,106,.25); }
.btn-ghost { background: #fff; color: var(--primary); border: 1px solid var(--primary); }
.btn-ghost:hover { background: var(--bg-soft); }

/* 联系咨询弹窗 */
.contact-modal { position: fixed; inset: 0; z-index: 200; display: flex; align-items: center; justify-content: center; }
.contact-modal[hidden] { display: none; }
.contact-modal-mask { position: absolute; inset: 0; background: rgba(0,0,0,.5); }
.contact-modal-body {
    position: relative; background: #fff; border-radius: 16px; padding: 32px;
    text-align: center; width: calc(100% - 48px); max-width: 360px;
    box-shadow: 0 24px 60px rgba(0,0,0,.3);
}
.contact-modal-body h3 { margin: 0 0 8px; font-size: 20px; color: var(--text); }
.contact-modal-body p { margin: 0 0 20px; font-size: 14px; color: var(--muted); }
.contact-modal-body img { display: block; width: 240px; max-width: 100%; height: auto; margin: 0 auto; border-radius: 8px; }
.contact-modal-close {
    position: absolute; top: 12px; right: 12px; width: 32px; height: 32px;
    border: none; background: var(--bg-soft); border-radius: 50%; cursor: pointer;
    font-size: 20px; line-height: 1; color: var(--muted); font-family: inherit;
}
.contact-modal-close:hover { background: var(--border); color: var(--text); }

/* 数据条 */
.stats { border-bottom: 1px solid var(--border); background: var(--bg); }
.stats-inner { display: flex; justify-content: space-around; padding: 28px 0; text-align: center; }
.stat b { display: block; font-size: 30px; color: var(--primary-dark); }
.stat span { color: var(--muted); font-size: 14px; }

/* 通用章节 */
section.block { padding: 84px 0; }
.sec-head { text-align: center; max-width: 640px; margin: 0 auto 52px; }
.sec-head h2 { font-size: 34px; margin: 0 0 14px; font-weight: 800; }
.sec-head p { color: var(--muted); font-size: 16px; margin: 0; }
.tag {
    display: inline-block; padding: 4px 12px; border-radius: 999px;
    background: rgba(22,160,106,.1); color: var(--primary-dark); font-size: 13px; margin-bottom: 14px;
}

/* 服务内容 */
.features { background: var(--bg-soft); }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.card {
    background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
    padding: 30px; transition: transform .2s, box-shadow .2s;
}
.card:hover { transform: translateY(-4px); box-shadow: 0 16px 40px rgba(16,127,84,.1); }
.card .icon {
    width: 52px; height: 52px; border-radius: 14px; margin-bottom: 20px;
    background: rgba(22,160,106,.1); color: var(--primary); font-size: 26px;
    display: flex; align-items: center; justify-content: center;
}
.card h3 { margin: 0 0 10px; font-size: 18px; }
.card p { color: var(--muted); font-size: 14px; margin: 0; }

/* 业务服务 */
.biz-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.biz-card {
    background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
    padding: 34px 28px; text-align: center; transition: transform .2s, box-shadow .2s;
}
.biz-card:hover { transform: translateY(-6px); box-shadow: 0 16px 40px rgba(16,127,84,.12); }
.biz-num {
    width: 52px; height: 52px; margin: 0 auto 18px; border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent)); color: #fff;
    font-size: 22px; font-weight: 800; display: flex; align-items: center; justify-content: center;
}
.biz-card h3 { margin: 0 0 10px; font-size: 18px; }
.biz-card p { color: var(--muted); font-size: 14px; margin: 0; line-height: 1.8; }

/* 价格 */
.pricing { background: var(--bg-soft); }
.price-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; align-items: stretch; }
.price-card {
    background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
    padding: 34px 30px; display: flex; flex-direction: column; position: relative;
}
.price-card.featured { border: 2px solid var(--primary); box-shadow: 0 20px 50px rgba(16,127,84,.14); }
.price-card .flag {
    position: absolute; top: -13px; left: 50%; transform: translateX(-50%);
    background: var(--primary); color: #fff; font-size: 12px; padding: 4px 14px; border-radius: 999px;
}
.price-card h3 { margin: 0 0 6px; font-size: 18px; }
.price-card .desc { color: var(--muted); font-size: 13px; margin: 0 0 22px; }
.price { font-size: 38px; font-weight: 800; color: var(--primary-dark); }
.price small { font-size: 15px; font-weight: 400; color: var(--muted); }
.price-card ul { list-style: none; padding: 0; margin: 24px 0; flex: 1; }
.price-card li { padding: 8px 0 8px 26px; position: relative; font-size: 14px; color: #455560; }
.price-card li::before { content: "✓"; position: absolute; left: 0; color: var(--primary); font-weight: 700; }
.price-card form { margin-top: auto; }
.price-card .btn { width: 100%; border: 0; background: var(--primary); color: #fff; }
.price-card .btn:hover { background: var(--primary-dark); }
.price-card.featured .btn { background: linear-gradient(135deg, var(--primary), var(--accent)); }
.price-card .btn-ghost2 { background: #fff; color: var(--primary); border: 1px solid var(--primary); }
.price-card .pay-phone {
    width: 100%; padding: 10px 12px; border: 1px solid #d5e2db; border-radius: 8px;
    font-size: 14px; outline: none; margin-bottom: 12px; font-family: inherit;
}
.price-card .pay-phone:focus { border-color: var(--primary); }
.price-card a.btn { text-decoration: none; }

/* CTA */
.cta {
    background: linear-gradient(135deg, #0f7f54, #16a06a); color: #fff; text-align: center;
    padding: 80px 0;
}
.cta h2 { font-size: 34px; margin: 0 0 14px; font-weight: 800; }
.cta p { opacity: .95; margin: 0 0 30px; font-size: 16px; }
.cta .btn { background: #fff; color: var(--primary-dark); }

/* 技术服务项目展示 */
.service-banner {
    background: linear-gradient(135deg, #0f7f54 0%, #16a06a 45%, #34c78f 100%);
    color: #fff; padding: 64px 0; text-align: center;
}
.service-banner h1 { margin: 0 0 12px; font-size: 36px; font-weight: 800; }
.service-banner p { margin: 0; opacity: .95; font-size: 16px; }
.service-filter { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin: 28px 0 8px; }
.service-filter a {
    padding: 6px 18px; border-radius: 999px; font-size: 14px;
    border: 1px solid var(--border); color: var(--muted); transition: all .2s;
}
.service-filter a:hover { color: var(--primary); border-color: var(--primary); }
.service-filter a.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; padding: 24px 0 64px; }
.service-card {
    background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
    padding: 26px; display: flex; flex-direction: column;
    color: var(--text); text-decoration: none;
    transition: transform .2s, box-shadow .2s;
}
.service-card:hover { transform: translateY(-4px); box-shadow: 0 16px 40px rgba(16,127,84,.12); }
.service-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.service-code { font-size: 12px; color: var(--muted); }
.service-cat { font-size: 12px; padding: 3px 10px; border-radius: 999px; background: rgba(22,160,106,.1); color: var(--primary-dark); }
.service-card h3 { margin: 0 0 10px; font-size: 19px; }
.service-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
.service-tag { font-size: 12px; padding: 2px 8px; border-radius: 6px; background: var(--bg-soft); color: var(--muted); }
.service-desc { color: var(--muted); font-size: 14px; margin: 0 0 18px; flex: 1; }
.service-meta { border-top: 1px dashed var(--border); padding-top: 14px; margin-bottom: 16px; font-size: 13px; color: var(--muted); }
.service-meta div { padding: 3px 0; }
.service-price { display: flex; align-items: baseline; gap: 12px; }
.service-original { color: var(--muted); font-size: 14px; text-decoration: line-through; }
.service-discount { color: var(--primary-dark); font-size: 26px; font-weight: 800; }

/* 技术服务项目详情 */
.service-detail-wrap { padding: 40px 24px 64px; }
.breadcrumb { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; font-size: 14px; }
.breadcrumb a { color: var(--muted); transition: color .2s; }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .crumb-sep { color: var(--muted); }
.breadcrumb .crumb-current { color: var(--text); font-weight: 600; }
.sd-layout { display: flex; gap: 24px; align-items: flex-start; }
.sd-main { flex: 1; min-width: 0; background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 36px; }
.sd-title-row { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.sd-title-row h1 { margin: 0; font-size: 26px; }
.sd-code { font-size: 13px; color: var(--muted); }
.sd-sub { display: flex; gap: 14px; align-items: center; margin: 14px 0; font-size: 13px; color: var(--muted); flex-wrap: wrap; }
.sd-section { margin-top: 28px; }
.sd-section h2 { font-size: 18px; margin: 0 0 12px; padding-left: 10px; border-left: 3px solid var(--primary); }
.sd-section p { color: var(--text); font-size: 15px; line-height: 1.8; margin: 0; }

/* 详情右侧栏 */
.sd-sidebar { width: 280px; flex-shrink: 0; position: sticky; top: 24px; }
.sd-side-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.sd-side-label { font-size: 13px; color: var(--muted); }
.sd-side-num { color: var(--primary-dark); font-size: 34px; font-weight: 800; margin: 6px 0; }
.sd-side-original { font-size: 14px; color: var(--muted); text-decoration: line-through; }
.sd-side-actions { display: flex; flex-direction: column; gap: 10px; margin-top: 18px; }
.sd-side-actions a, .sd-side-actions button { display: block; width: 100%; text-align: center; padding: 12px 16px; border-radius: 10px; font-size: 15px; font-weight: 600; }
.sd-side-actions button { border: none; cursor: pointer; font-family: inherit; }
.sd-btn-primary { background: var(--primary); color: #fff; }
.sd-btn-primary:hover { background: var(--primary-dark); }
.sd-btn-outline { background: #fff; color: var(--primary); border: 1px solid var(--primary); }
.sd-btn-outline:hover { background: var(--bg-soft); }
.sd-side-meta { border-top: 1px dashed var(--border); margin-top: 18px; padding-top: 14px; font-size: 13px; color: var(--muted); }
.sd-side-meta div { padding: 4px 0; }

@media (max-width: 900px) {
    .hero { padding: 64px 0; }
    .grid, .price-grid, .service-grid, .biz-grid { grid-template-columns: 1fr; }
    .sd-layout { flex-direction: column; }
    .sd-sidebar { width: 100%; position: static; }
    .sd-main { padding: 24px; }
    .service-detail-wrap { padding: 28px 20px 48px; }
    .nav-links { display: none; }
}
@media (max-width: 480px) {
    .hero h1 { font-size: 34px; }
    .stats-inner { flex-wrap: wrap; gap: 20px; }
    .service-detail-wrap { padding: 20px 16px 40px; }
    .sd-main { padding: 20px 16px; }
    .sd-side-card { padding: 20px 16px; }
    .sd-title-row { gap: 10px; }
    .sd-title-row h1 { font-size: 22px; }
    .sd-side-num { font-size: 28px; }
    .sd-section { margin-top: 24px; }
    .sd-section h2 { font-size: 17px; }
    .sd-section p { font-size: 14px; line-height: 1.7; }
    .sd-side-actions a, .sd-side-actions button { padding: 12px; }
    .breadcrumb { font-size: 13px; margin-bottom: 16px; }
}