:root {
    --brand: #2563eb;
    --brand-d: #1d4ed8;
    --brand-l: #eff6ff;
    --teal: #0d9488;
    --teal-l: #f0fdfa;
    --ink: #0f172a;
    --ink-2: #475569;
    --ink-3: #94a3b8;
    --line: #e2e8f0;
    --bg: #ffffff;
    --bg-2: #f8fafc;
    --radius: 16px;
    font-family: -apple-system, BlinkMacSystemFont, "PingFang HK", "PingFang SC", "Microsoft JhengHei", "Microsoft YaHei", "Noto Sans CJK TC", "Segoe UI", Roboto, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--bg); line-height: 1.6; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, p { margin: 0; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.muted { color: var(--ink-3); }

/* 导航 */
.nav { position: sticky; top: 0; z-index: 10; background: rgba(255, 255, 255, .92); backdrop-filter: saturate(180%) blur(12px); -webkit-backdrop-filter: saturate(180%) blur(12px); border-bottom: 1px solid var(--line); }
.nav-inner { height: 64px; display: flex; align-items: center; gap: 32px; }
.brand { display: flex; align-items: center; gap: 10px; font-size: 17px; }
.brand b { font-weight: 700; }
.logo { width: 32px; height: 32px; border-radius: 9px; background: var(--brand); color: #fff; display: grid; place-items: center; font-weight: 800; font-size: 17px; }
.links { display: flex; gap: 28px; font-size: 15px; color: var(--ink-2); }
.links a:hover { color: var(--brand); }
.nav-right { margin-left: auto; display: flex; align-items: center; gap: 16px; }
.lang { display: flex; border: 1px solid var(--line); border-radius: 999px; padding: 2px; }
.lang a { font-size: 13px; padding: 3px 10px; border-radius: 999px; color: var(--ink-2); }
.lang a.on { background: var(--ink); color: #fff; }
.lang a:not(.on):hover { color: var(--brand); }

/* 微我账号 */
.account { position: relative; display: flex; align-items: center; }
.acct-login { font-size: 14px; font-weight: 600; color: var(--ink); padding: 7px 12px; border-radius: 10px; }
.acct-login:hover { color: var(--brand); background: var(--brand-l); }
.acct-chip { display: flex; align-items: center; gap: 8px; padding: 3px 10px 3px 3px; border: 1px solid var(--line); border-radius: 999px; background: #fff; cursor: pointer; font: inherit; color: var(--ink); }
.acct-chip:hover { border-color: #bfdbfe; }
.acct-avatar { width: 28px; height: 28px; border-radius: 50%; object-fit: cover; background: var(--bg-2); }
.acct-name { font-size: 14px; font-weight: 600; max-width: 96px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.acct-menu { position: absolute; right: 0; top: calc(100% + 8px); min-width: 168px; background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 6px; box-shadow: 0 12px 32px -8px rgba(15, 23, 42, .18); z-index: 20; }
.acct-menu a, .acct-menu button { display: block; width: 100%; text-align: left; padding: 9px 12px; border: 0; background: none; border-radius: 8px; font: inherit; font-size: 14px; color: var(--ink); cursor: pointer; }
.acct-menu a:hover, .acct-menu button:hover { background: var(--bg-2); }
.acct-menu button { color: #dc2626; }
.account[data-state="user"] ~ .nav-cta { display: none; }
[hidden] { display: none !important; }

/* 按钮 */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; background: var(--brand); color: #fff; font-weight: 600; font-size: 15px; padding: 10px 20px; border-radius: 10px; transition: background .15s, transform .15s; white-space: nowrap; }
.btn:hover { background: var(--brand-d); }
.btn:active { transform: scale(.98); }
.btn-sm { font-size: 14px; padding: 8px 16px; }
.btn-lg { font-size: 16px; padding: 14px 28px; border-radius: 12px; }
.btn-ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.btn-ghost:hover { background: var(--bg-2); }

/* 首屏 */
.hero { background: linear-gradient(180deg, var(--brand-l) 0%, #fff 100%); }
.hero-inner { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; padding-top: 88px; padding-bottom: 96px; }
.badge { display: inline-block; font-size: 13px; color: var(--brand); background: #fff; border: 1px solid #bfdbfe; padding: 4px 12px; border-radius: 999px; margin-bottom: 20px; }
.hero h1 { font-size: clamp(36px, 5.2vw, 60px); line-height: 1.15; letter-spacing: -.02em; font-weight: 800; }
.lead { font-size: 18px; color: var(--ink-2); margin-top: 20px; max-width: 520px; }
.actions { display: flex; gap: 12px; margin-top: 32px; flex-wrap: wrap; }

/* 首屏示意图（纯 CSS，不依赖图片素材） */
.hero-art { display: flex; justify-content: center; }
.mock { width: 300px; background: #fff; border: 1px solid var(--line); border-radius: 24px; padding: 20px; box-shadow: 0 24px 60px -20px rgba(37, 99, 235, .35); }
.mock-bar { display: flex; gap: 6px; margin-bottom: 18px; }
.mock-bar i { width: 8px; height: 8px; border-radius: 50%; background: var(--line); }
.mock-q { height: 44px; border-radius: 8px; background: linear-gradient(90deg, var(--line) 85%, transparent 85%) top / 100% 12px no-repeat, linear-gradient(90deg, var(--line) 55%, transparent 55%) bottom / 100% 12px no-repeat; margin-bottom: 18px; }
.mock-opt { height: 40px; border: 1px solid var(--line); border-radius: 10px; margin-bottom: 10px; display: flex; align-items: center; padding: 0 12px; }
.mock-opt span { width: 22px; height: 22px; border-radius: 6px; background: var(--bg-2); color: var(--ink-3); font-size: 12px; font-weight: 700; display: grid; place-items: center; }
.mock-opt.ok { border-color: #86efac; background: #f0fdf4; }
.mock-opt.ok span { background: #22c55e; color: #fff; }
.mock-ai { display: flex; gap: 10px; align-items: center; margin-top: 16px; padding: 12px; border-radius: 12px; background: var(--brand-l); }
.mock-ai b { flex-shrink: 0; width: 30px; height: 30px; border-radius: 8px; background: var(--brand); color: #fff; font-size: 12px; display: grid; place-items: center; }
.mock-ai div { flex: 1; display: flex; flex-direction: column; gap: 6px; }
.mock-ai i { height: 8px; border-radius: 4px; background: #bfdbfe; }
.mock-ai i:last-child { width: 60%; }

/* 区块 */
.section { padding: 88px 0; }
.section.alt { background: var(--bg-2); }
.section h2 { font-size: 32px; font-weight: 800; letter-spacing: -.01em; }
.sub { color: var(--ink-2); margin-top: 8px; font-size: 16px; }

/* 产品卡 */
.product { margin-top: 32px; border: 1px solid var(--line); border-radius: var(--radius); padding: 32px; background: #fff; }
.product-head { display: flex; gap: 20px; align-items: flex-start; }
.product-head p { color: var(--ink-2); margin-top: 6px; max-width: 760px; }
.product h3 { font-size: 22px; font-weight: 700; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.p-icon { flex-shrink: 0; width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center; color: #fff; font-size: 22px; font-weight: 800; }
.p-icon.blue { background: var(--brand); }
.p-icon.teal { background: var(--teal); }
.tag { font-size: 12px; font-weight: 600; padding: 2px 10px; border-radius: 999px; background: var(--bg-2); color: var(--ink-2); border: 1px solid var(--line); }
.tag.live { background: #f0fdf4; color: #15803d; border-color: #bbf7d0; }
.features { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 28px; }
.feat { background: var(--bg-2); border-radius: 12px; padding: 18px; display: flex; flex-direction: column; gap: 6px; }
.feat b { font-size: 15px; }
.feat span { font-size: 14px; color: var(--ink-2); }
.product-foot { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-top: 28px; padding-top: 24px; border-top: 1px solid var(--line); font-size: 14px; flex-wrap: wrap; }
.product.soon { background: var(--teal-l); border-color: #ccfbf1; }
.ticks { list-style: none; padding: 0; margin: 20px 0 0 72px; display: flex; gap: 28px; flex-wrap: wrap; color: var(--ink-2); font-size: 15px; }
.ticks li::before { content: "✓"; color: var(--teal); font-weight: 700; margin-right: 8px; }

/* 关于 */
.about { display: grid; grid-template-columns: 1.2fr .8fr; gap: 48px; align-items: center; }
.about p { color: var(--ink-2); margin-top: 16px; font-size: 16px; }
.kpis { display: grid; gap: 14px; }
.kpis div { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 18px 22px; display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.kpis b { font-size: 22px; font-weight: 800; color: var(--brand); }
.kpis span { color: var(--ink-2); font-size: 14px; }

/* 联络 */
.contact { margin-top: 28px; display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.contact div { border: 1px solid var(--line); border-radius: 14px; padding: 22px; display: flex; flex-direction: column; gap: 6px; }
.contact span { font-size: 13px; }
.contact b { font-size: 16px; font-weight: 600; }

/* 页脚 */
.footer { border-top: 1px solid var(--line); padding: 28px 0; font-size: 13px; color: var(--ink-2); }
.footer-inner { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

/* 响应式 */
@media (max-width: 960px) {
    .features { grid-template-columns: repeat(2, 1fr); }
    .hero-inner { grid-template-columns: 1fr; padding-top: 56px; padding-bottom: 64px; }
    .hero-art { display: none; }
    .about { grid-template-columns: 1fr; gap: 28px; }
}
@media (max-width: 720px) {
    .links { display: none; }
    .nav-inner { gap: 12px; }
    .brand-text { display: none; }
    .nav-right { gap: 10px; }
    .btn-sm { padding: 7px 12px; font-size: 13px; }
    .nav-cta { display: none; }
    .acct-name { display: none; }
    .acct-chip { padding: 3px; }
    .section { padding: 64px 0; }
    .section h2 { font-size: 26px; }
    .product { padding: 22px; }
    .product-head { flex-direction: column; gap: 14px; }
    .features { grid-template-columns: 1fr; }
    .ticks { margin-left: 0; flex-direction: column; gap: 10px; }
    .contact { grid-template-columns: 1fr; }
    .lead { font-size: 16px; }
}