:root {
  --ink: #0b1220;
  --ink-2: #334155;
  --muted: #64748b;
  --line: #e2e8f0;
  --bg: #ffffff;
  --soft: #f6f8fb;
  --brand: #1660f5;
  --brand-2: #0ea5e9;
  --brand-ink: #0b47c4;
  --accent: #10b981;
  --radius: 16px;
  --shadow: 0 1px 2px rgba(15, 23, 42, .04), 0 8px 24px rgba(15, 23, 42, .06);
  --shadow-lg: 0 2px 4px rgba(15, 23, 42, .04), 0 24px 48px rgba(15, 23, 42, .12);
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; -webkit-text-size-adjust: 100%; }
body { margin: 0; font-family: var(--font); color: var(--ink); background: var(--bg); line-height: 1.7; font-size: 16px; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
h1, h2, h3, h4 { line-height: 1.25; margin: 0; letter-spacing: -.01em; }
p { margin: 0; }
button { font: inherit; cursor: pointer; }
.wrap { width: min(1200px, 100% - 48px); margin: 0 auto; }
.hp { position: absolute !important; left: -9999px; width: 1px; height: 1px; opacity: 0; }

/* ---------- 按钮 ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 11px 22px; border-radius: 999px; border: 1px solid transparent; background: var(--brand); color: #fff; font-weight: 600; font-size: 15px; transition: transform .15s, background .15s, box-shadow .15s; white-space: nowrap; }
.btn:hover { background: var(--brand-ink); box-shadow: 0 8px 20px rgba(22, 96, 245, .28); transform: translateY(-1px); }
.btn-sm { padding: 7px 16px; font-size: 14px; }
.btn-lg { padding: 14px 28px; font-size: 16px; }
.btn-block { width: 100%; }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { background: var(--soft); box-shadow: none; }
.btn-light { background: #fff; color: var(--brand-ink); }
.btn-light:hover { background: #eef4ff; }
.btn-ghost-light { background: transparent; color: #fff; border-color: rgba(255, 255, 255, .4); }
.btn-ghost-light:hover { background: rgba(255, 255, 255, .1); box-shadow: none; }
.btn-block + .btn-block { margin-top: 10px; }
.link, .more { color: var(--brand); font-weight: 600; font-size: 15px; }
.link:hover { text-decoration: underline; }

/* ---------- 导航 ---------- */
.nav { position: sticky; top: 0; z-index: 50; background: rgba(255, 255, 255, .82); backdrop-filter: saturate(180%) blur(16px); -webkit-backdrop-filter: saturate(180%) blur(16px); border-bottom: 1px solid transparent; transition: border-color .2s; }
.nav.scrolled { border-bottom-color: var(--line); }
.nav-inner { display: flex; align-items: center; height: 64px; gap: 32px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; }
.logo-mark { width: 32px; height: 32px; border-radius: 9px; background: linear-gradient(135deg, var(--brand), var(--brand-2)); color: #fff; display: grid; place-items: center; font-size: 17px; }
.nav-links { display: flex; gap: 4px; flex: 1; }
.nav-links a { padding: 6px 12px; border-radius: 8px; color: var(--ink-2); font-size: 15px; transition: background .15s, color .15s; }
.nav-links a:hover { background: var(--soft); color: var(--ink); }
.nav-links a.on { color: var(--brand); font-weight: 600; }
.nav-cta { display: flex; align-items: center; gap: 16px; }
.nav-phone { font-weight: 600; font-size: 15px; color: var(--ink-2); }
.nav-toggle { display: none; background: none; border: 0; width: 40px; height: 40px; margin-left: auto; position: relative; }
.nav-toggle span { position: absolute; left: 10px; right: 10px; height: 2px; background: var(--ink); border-radius: 2px; transition: transform .2s, top .2s; }
.nav-toggle span:first-child { top: 15px; }
.nav-toggle span:last-child { top: 23px; }
.nav.open .nav-toggle span:first-child { top: 19px; transform: rotate(45deg); }
.nav.open .nav-toggle span:last-child { top: 19px; transform: rotate(-45deg); }
.nav-drawer { display: none; }

/* ---------- 通用区块 ---------- */
.section { padding: 96px 0; }
.section-tight { padding: 48px 0 96px; }
.section-soft { background: var(--soft); }
.section-dark { background: radial-gradient(1200px 500px at 80% -10%, rgba(22, 96, 245, .35), transparent 60%), var(--ink); color: #e2e8f0; }
.section-dark h2, .section-dark h3 { color: #fff; }
.sec-head { max-width: 720px; margin-bottom: 48px; }
.sec-head h2 { font-size: clamp(28px, 3.6vw, 40px); font-weight: 700; }
.sec-head p { color: var(--muted); margin-top: 14px; font-size: 17px; }
.section-dark .sec-head p { color: #94a3b8; }
.sec-head-row { max-width: none; display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; }
.eyebrow { display: inline-block; color: var(--brand); font-weight: 600; font-size: 14px; letter-spacing: .08em; margin-bottom: 12px; }
.section-dark .eyebrow { color: #7cb4ff; }
.badge { display: inline-flex; padding: 6px 14px; border-radius: 999px; background: #eef4ff; color: var(--brand-ink); font-size: 13px; font-weight: 600; }
.badge-dark { background: rgba(255, 255, 255, .08); color: #cbd5e1; }
.chip { display: inline-block; padding: 2px 10px; border-radius: 999px; background: #eef4ff; color: var(--brand-ink); font-size: 12px; font-weight: 600; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; }
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); transition: transform .2s, box-shadow .2s, border-color .2s; }
a.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: transparent; }
.empty { color: var(--muted); text-align: center; padding: 48px 0; }

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; padding: 72px 0 56px; }
.hero-glow { position: absolute; inset: -200px -10% auto; height: 700px; background: radial-gradient(600px 360px at 75% 35%, rgba(14, 165, 233, .18), transparent 70%), radial-gradient(700px 400px at 25% 10%, rgba(22, 96, 245, .14), transparent 70%); pointer-events: none; }
.hero-inner { position: relative; display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.hero h1 { font-size: clamp(38px, 5.6vw, 64px); font-weight: 800; margin: 20px 0; letter-spacing: -.02em; }
.hero h1 em { font-style: normal; background: linear-gradient(90deg, var(--brand), var(--brand-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { font-size: 18px; color: var(--muted); max-width: 560px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.hero-visual { position: relative; height: 420px; }
.hv-card { position: absolute; background: #fff; border: 1px solid var(--line); border-radius: 18px; box-shadow: var(--shadow-lg); padding: 18px 20px; animation: float 6s ease-in-out infinite; }
.hv-pay { top: 10px; left: 0; width: 280px; }
.hv-chat { top: 150px; right: 0; width: 300px; animation-delay: -2s; }
.hv-stat { bottom: 0; left: 40px; width: 220px; animation-delay: -4s; }
.hv-row { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--ink-2); }
.hv-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px rgba(16, 185, 129, .15); }
.hv-amount { font-size: 30px; font-weight: 800; margin-top: 6px; }
.hv-sub { font-size: 13px; color: var(--muted); }
.hv-bubble { font-size: 14px; padding: 8px 12px; border-radius: 12px; margin-bottom: 8px; max-width: 90%; }
.hv-bubble.me { background: var(--brand); color: #fff; margin-left: auto; border-bottom-right-radius: 4px; }
.hv-bubble.ai { background: var(--soft); border-bottom-left-radius: 4px; }
.hv-tag { font-size: 12px; color: var(--accent); font-weight: 600; }
.hv-spark { width: 100%; height: 36px; color: var(--accent); margin-top: 6px; }
@keyframes float { 50% { transform: translateY(-10px); } }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); margin: 56px 0 0; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(255, 255, 255, .7); }
.stats div { padding: 24px 28px; border-left: 1px solid var(--line); }
.stats div:first-child { border-left: 0; }
.stats dt { font-size: 14px; color: var(--muted); }
.stats dd { margin: 4px 0 0; font-size: 32px; font-weight: 800; letter-spacing: -.02em; }

/* ---------- Tabs / 筛选 ---------- */
.tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 28px; }
.tab { padding: 7px 16px; border-radius: 999px; border: 1px solid var(--line); background: #fff; color: var(--ink-2); font-size: 14px; transition: all .15s; }
.tab:hover { border-color: var(--brand); color: var(--brand); }
.tab.on { background: var(--ink); border-color: var(--ink); color: #fff; }
[data-filter-grid] > .is-hidden { display: none; }

/* ---------- 业务卡片 ---------- */
.svc { display: flex; flex-direction: column; padding: 28px; }
.svc-icon { font-size: 28px; width: 52px; height: 52px; display: grid; place-items: center; border-radius: 14px; background: var(--soft); margin-bottom: 18px; }
.svc-group { font-size: 13px; color: var(--muted); }
.svc h3 { font-size: 19px; margin: 4px 0 10px; }
.svc p { color: var(--muted); font-size: 15px; flex: 1; }
.svc .more { margin-top: 18px; font-size: 14px; }
.ai-card { padding: 32px; border-radius: var(--radius); background: rgba(255, 255, 255, .04); border: 1px solid rgba(255, 255, 255, .08); display: flex; flex-direction: column; }
.ai-card .svc-icon { background: rgba(255, 255, 255, .08); }
.ai-card h3 { font-size: 21px; margin-bottom: 10px; }
.ai-card p { color: #94a3b8; }
.ai-card .ticks { margin: 20px 0; flex: 1; }
.ai-card .ticks li { color: #cbd5e1; }
.ai-card .more { color: #7cb4ff; }
.ticks { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.ticks li { position: relative; padding-left: 26px; font-size: 15px; }
.ticks li::before { content: ""; position: absolute; left: 0; top: 6px; width: 16px; height: 16px; border-radius: 50%; background: rgba(16, 185, 129, .15) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4.5 8.2l2.2 2.2 4.8-4.8' fill='none' stroke='%2310b981' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/16px no-repeat; }

/* ---------- 案例卡片 ---------- */
.case-card { overflow: hidden; display: flex; flex-direction: column; }
.case-cover { position: relative; height: 150px; background: linear-gradient(135deg, #e0ebff, #e0f7ff) center/cover; display: grid; place-items: center; }
.case-initial { font-size: 64px; font-weight: 800; color: rgba(22, 96, 245, .2); }
.case-ind { position: absolute; left: 16px; top: 16px; padding: 3px 12px; border-radius: 999px; background: rgba(255, 255, 255, .9); font-size: 12px; font-weight: 600; }
.case-body { padding: 22px 24px 24px; display: flex; flex-direction: column; flex: 1; }
.case-body h3 { font-size: 18px; margin-bottom: 8px; }
.case-body p { color: var(--muted); font-size: 14px; flex: 1; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.case-foot { display: flex; align-items: center; justify-content: space-between; margin-top: 18px; gap: 12px; }
.metric { font-size: 13px; font-weight: 700; color: var(--accent); background: rgba(16, 185, 129, .1); padding: 3px 10px; border-radius: 999px; }
.case-foot .more { font-size: 14px; margin-left: auto; }

/* ---------- 流程 ---------- */
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: s; }
.steps li { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; position: relative; }
.step-n { display: grid; place-items: center; width: 36px; height: 36px; border-radius: 50%; background: var(--brand); color: #fff; font-weight: 700; margin-bottom: 16px; }
.steps h3 { font-size: 18px; margin-bottom: 8px; }
.steps p { color: var(--muted); font-size: 15px; }
.steps-v { grid-template-columns: 1fr; gap: 0; margin: 16px 0 28px; }
.steps-v li { border: 0; background: none; padding: 0 0 20px 52px; }
.steps-v li:not(:last-child)::after { content: ""; position: absolute; left: 17px; top: 40px; bottom: 4px; width: 2px; background: var(--line); }
.steps-v .step-n { position: absolute; left: 0; top: 0; margin: 0; }
.steps-v h3 { font-size: 16px; margin-bottom: 2px; padding-top: 6px; }

/* ---------- 理由 / 伙伴 ---------- */
.reason { display: flex; gap: 16px; padding: 24px; }
.reason > span { font-size: 26px; line-height: 1; }
.reason h3 { font-size: 17px; margin-bottom: 6px; }
.reason p { color: var(--muted); font-size: 15px; }
.partners { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.partner { background: #fff; padding: 28px 24px; display: flex; flex-direction: column; gap: 6px; min-height: 120px; justify-content: center; }
.partner strong { font-size: 19px; }
.partner img { max-height: 36px; width: auto; }
.partner span { font-size: 13px; color: var(--muted); }

/* ---------- 资讯 ---------- */
.news-card { padding: 26px; display: flex; flex-direction: column; }
.news-cover { border-radius: 10px; margin-bottom: 16px; aspect-ratio: 16/9; object-fit: cover; }
.news-meta { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--muted); }
.news-card h3 { font-size: 18px; margin: 14px 0 10px; }
.news-card p { color: var(--muted); font-size: 14px; flex: 1; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.news-card .more { margin-top: 16px; font-size: 14px; }

/* ---------- 内页 ---------- */
.page-head { padding: 56px 0 40px; background: linear-gradient(180deg, #f3f7ff, #fff); }
.page-head h1 { font-size: clamp(30px, 4.4vw, 46px); font-weight: 800; max-width: 860px; }
.page-head .lead { margin-top: 16px; max-width: 760px; }
.crumbs { font-size: 14px; color: var(--muted); margin-bottom: 20px; }
.crumbs a:hover { color: var(--brand); }
.detail { display: grid; grid-template-columns: 1fr 320px; gap: 48px; align-items: start; }
.detail-main h2 { font-size: 24px; margin: 40px 0 18px; }
.detail-main > h2:first-child { margin-top: 0; }
.detail-side { position: sticky; top: 88px; display: grid; gap: 16px; }
.side-card { border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; background: #fff; }
.side-card h3 { font-size: 17px; margin-bottom: 8px; }
.side-card p { color: var(--muted); font-size: 14px; margin-bottom: 16px; }
.side-metric { font-size: 26px; font-weight: 800; color: var(--accent); margin-bottom: 12px; }
.side-card .tags { margin-bottom: 20px; }
.side-list a { display: block; padding: 8px 0; border-top: 1px solid var(--line); font-size: 14px; color: var(--ink-2); }
.side-list a:hover { color: var(--brand); }
.side-list h3 + a { border-top: 0; }
.trio { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.trio-item { background: var(--soft); border-radius: var(--radius); padding: 22px; }
.trio-item span { font-size: 13px; color: var(--muted); font-weight: 600; }
.trio-item p { margin-top: 8px; font-size: 15px; }
.trio-hl { background: rgba(16, 185, 129, .08); }
.trio-hl span { color: var(--accent); }
.flow { margin: 0; padding: 0; list-style: none; counter-reset: f; display: grid; gap: 10px; }
.flow li { counter-increment: f; position: relative; padding: 14px 16px 14px 56px; border: 1px solid var(--line); border-radius: 12px; font-size: 15px; background: #fff; }
.flow li::before { content: counter(f); position: absolute; left: 16px; top: 13px; width: 26px; height: 26px; border-radius: 50%; background: #eef4ff; color: var(--brand); font-size: 13px; font-weight: 700; display: grid; place-items: center; }
.timeline { border-left: 2px solid var(--line); margin-left: 6px; }
.tl-item { position: relative; padding: 0 0 22px 24px; }
.tl-item::before { content: ""; position: absolute; left: -7px; top: 6px; width: 12px; height: 12px; border-radius: 50%; background: #fff; border: 2px solid var(--brand); }
.tl-item strong { font-size: 15px; }
.tl-item p { color: var(--muted); font-size: 15px; }
.prose p { margin-bottom: 16px; color: var(--ink-2); }
.prose h2 { font-size: 24px; margin: 36px 0 14px; }
.article-sum { font-size: 18px; color: var(--ink) !important; padding-left: 16px; border-left: 3px solid var(--brand); }
.article-cover { border-radius: var(--radius); margin-bottom: 28px; }

.sol-list { display: grid; gap: 14px; }
.sol { border: 1px solid var(--line); border-radius: var(--radius); background: #fff; transition: box-shadow .2s; }
.sol[open] { box-shadow: var(--shadow); }
.sol summary { list-style: none; display: flex; align-items: center; gap: 20px; padding: 22px 26px; cursor: pointer; }
.sol summary::-webkit-details-marker { display: none; }
.sol-n { font-size: 28px; font-weight: 800; color: #cbd5e1; font-variant-numeric: tabular-nums; }
.sol[open] .sol-n { color: var(--brand); }
.sol-t { flex: 1; display: flex; flex-direction: column; }
.sol-t strong { font-size: 18px; }
.sol-t small { color: var(--muted); font-size: 14px; }
.sol-x { width: 28px; height: 28px; border-radius: 50%; background: var(--soft); position: relative; flex: none; }
.sol-x::before, .sol-x::after { content: ""; position: absolute; left: 8px; right: 8px; top: 13px; height: 2px; background: var(--ink-2); transition: transform .2s; }
.sol-x::after { transform: rotate(90deg); }
.sol[open] .sol-x::after { transform: rotate(0); }
.sol-body { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; padding: 6px 26px 28px 74px; }
.sol-body h4 { font-size: 14px; color: var(--muted); margin: 0 0 10px; }
.sol-body p { margin-bottom: 22px; }
.sol-body .flow { margin-bottom: 20px; }

.about { display: grid; grid-template-columns: 1fr 380px; gap: 56px; align-items: start; }
.about .prose h2:first-child { margin-top: 0; }
.info { display: grid; grid-template-columns: 80px 1fr; gap: 10px 12px; margin: 16px 0; font-size: 14px; }
.info dt { color: var(--muted); }
.info dd { margin: 0; }
.info-card img { margin-top: 8px; }

/* ---------- 表单 ---------- */
.req { display: grid; grid-template-columns: 1fr 360px; gap: 48px; align-items: start; }
.form { padding: 32px; display: grid; gap: 18px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form label { display: grid; gap: 6px; font-size: 14px; font-weight: 600; color: var(--ink-2); }
.form label b { color: #ef4444; }
.form input, .form select, .form textarea { font: inherit; font-weight: 400; font-size: 15px; padding: 11px 14px; border: 1px solid var(--line); border-radius: 10px; background: #fff; color: var(--ink); width: 100%; transition: border-color .15s, box-shadow .15s; }
.form input:focus, .form select:focus, .form textarea:focus { outline: 0; border-color: var(--brand); box-shadow: 0 0 0 4px rgba(22, 96, 245, .12); }
.form .invalid { border-color: #ef4444; }
.form-err { color: #ef4444; font-size: 14px; }
.form-note { font-size: 13px; color: var(--muted); text-align: center; }
.form-done { padding: 56px 32px; text-align: center; }
.form-done h2 { margin: 16px 0 8px; }
.form-done p { color: var(--muted); margin-bottom: 24px; }
.done-icon { width: 64px; height: 64px; border-radius: 50%; margin: 0 auto; background: rgba(16, 185, 129, .12); color: var(--accent); font-size: 32px; display: grid; place-items: center; }
.req aside > h3 { font-size: 18px; }
.big-phone { font-size: 24px; font-weight: 800; color: var(--brand) !important; margin-bottom: 8px !important; }

/* ---------- CTA / 页脚 ---------- */
.cta-band { background: linear-gradient(120deg, var(--brand), #0b7ad1 60%, var(--brand-2)); color: #fff; padding: 56px 0; }
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.cta-band h2 { font-size: clamp(24px, 3vw, 32px); }
.cta-band p { opacity: .85; margin-top: 8px; }
.cta-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.footer { background: var(--ink); color: #94a3b8; padding: 64px 0 28px; font-size: 14px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.3fr; gap: 40px; }
.footer h4 { color: #fff; font-size: 15px; margin-bottom: 16px; }
.footer-grid a { display: block; padding: 3px 0; }
.footer-grid a:hover { color: #fff; }
.footer-grid p { margin-bottom: 6px; }
.footer-brand p { margin: 16px 0 !important; max-width: 340px; }
.logo-light { color: #fff; }
.footer-grid .logo { display: flex; }
.footer-qr { margin-top: 10px; border-radius: 8px; background: #fff; padding: 4px; }
.footer-bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; border-top: 1px solid rgba(255, 255, 255, .08); margin-top: 48px; padding-top: 24px; font-size: 13px; }
.footer-bottom a:hover { color: #fff; }

/* ---------- 智能助手 ---------- */
.chat-fab { position: fixed; right: 24px; bottom: 24px; z-index: 60; display: flex; align-items: center; gap: 8px; padding: 13px 20px; border: 0; border-radius: 999px; background: var(--ink); color: #fff; font-weight: 600; box-shadow: var(--shadow-lg); transition: transform .2s; }
.chat-fab:hover { transform: translateY(-2px); }
.chat { position: fixed; right: 24px; bottom: 24px; z-index: 70; width: 380px; max-height: min(620px, calc(100vh - 48px)); display: flex; flex-direction: column; background: #fff; border-radius: 20px; box-shadow: 0 30px 80px rgba(15, 23, 42, .28); overflow: hidden; animation: pop .2s ease-out; }
.chat[hidden] { display: none; }
@keyframes pop { from { opacity: 0; transform: translateY(12px) scale(.98); } }
.chat-head { display: flex; justify-content: space-between; align-items: center; padding: 16px 20px; background: var(--ink); color: #fff; }
.chat-head small { display: block; font-size: 12px; color: #94a3b8; }
.chat-close { background: none; border: 0; color: #fff; font-size: 26px; line-height: 1; opacity: .7; }
.chat-body { flex: 1; overflow-y: auto; padding: 18px; display: flex; flex-direction: column; gap: 10px; background: var(--soft); min-height: 220px; }
.msg { max-width: 85%; padding: 10px 14px; border-radius: 14px; font-size: 14px; white-space: pre-wrap; }
.msg-ai { background: #fff; border: 1px solid var(--line); border-bottom-left-radius: 4px; align-self: flex-start; }
.msg-me { background: var(--brand); color: #fff; border-bottom-right-radius: 4px; align-self: flex-end; }
.chat-quick { display: flex; flex-wrap: wrap; gap: 6px; padding: 10px 14px 0; background: var(--soft); }
.chat-quick button { border: 1px solid var(--line); background: #fff; border-radius: 999px; padding: 4px 12px; font-size: 13px; color: var(--ink-2); }
.chat-quick button:hover { border-color: var(--brand); color: var(--brand); }
.chat-input { display: flex; gap: 8px; padding: 12px 14px; background: var(--soft); }
.chat-input input, .chat-lead input { flex: 1; font: inherit; font-size: 14px; padding: 10px 14px; border: 1px solid var(--line); border-radius: 999px; outline: 0; }
.chat-input input:focus, .chat-lead input:focus { border-color: var(--brand); }
.chat-input button { border: 0; background: var(--brand); color: #fff; border-radius: 999px; padding: 0 18px; font-weight: 600; }
.chat-lead { display: grid; gap: 8px; padding: 14px; background: var(--soft); }
.chat-lead[hidden], .chat-input[hidden] { display: none; }
.chat-lead p { font-size: 13px; color: var(--muted); }
.chat-lead input { border-radius: 10px; }
.chat-lead-actions { display: flex; justify-content: flex-end; gap: 8px; }
.chat-lead-actions [data-cancel] { background: none; border: 0; color: var(--muted); font-size: 14px; }
.chat-foot { font-size: 12px; color: var(--muted); text-align: center; padding: 8px; border-top: 1px solid var(--line); }
.chat-foot a { color: var(--brand); }

.notfound { text-align: center; padding: 140px 0; }
.notfound h1 { font-size: 96px; font-weight: 800; color: #cbd5e1; }
.notfound p { color: var(--muted); margin: 8px 0 28px; }

/* ---------- 动效 ---------- */
.js .reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; transition-delay: var(--d, 0ms); }
.js .reveal.in { opacity: 1; transform: none; }
a.card.reveal.in:hover { transform: translateY(-4px); }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .hv-card { animation: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .nav-phone { display: none; }
  .nav-links a { padding: 6px 9px; }
}
@media (max-width: 960px) {
  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: block; }
  .nav-drawer { display: grid; max-height: 0; overflow: hidden; transition: max-height .3s; background: #fff; padding: 0 24px; }
  .nav.open .nav-drawer { max-height: 480px; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
  .nav-drawer a { padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 16px; }
  .nav-drawer .btn { margin-top: 16px; border: 0; }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .grid-3, .partners { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .detail, .about, .req { grid-template-columns: 1fr; }
  .detail-side { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .cta-inner { flex-direction: column; align-items: flex-start; }
  .trio { grid-template-columns: 1fr; }
  .sol-body { grid-template-columns: 1fr; padding-left: 26px; gap: 8px; }
}
@media (max-width: 640px) {
  .wrap { width: calc(100% - 32px); }
  .section { padding: 64px 0; }
  .section-tight { padding: 32px 0 64px; }
  .hero { padding: 40px 0; }
  .stats { grid-template-columns: repeat(2, 1fr); margin-top: 36px; }
  .stats div { padding: 18px; }
  .stats div:nth-child(3) { border-left: 0; }
  .stats div:nth-child(n+3) { border-top: 1px solid var(--line); }
  .stats dd { font-size: 26px; }
  .grid-2, .grid-3, .steps { grid-template-columns: 1fr; }
  .sec-head-row { flex-direction: column; align-items: flex-start; }
  .form { padding: 22px; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .sol summary { padding: 18px; gap: 14px; }
  .sol-n { font-size: 22px; }
  .sol-body { padding: 0 18px 22px; }
  .chat { right: 0; bottom: 0; width: 100%; max-height: 85vh; border-radius: 20px 20px 0 0; }
  .chat-fab { right: 16px; bottom: 16px; }
}