/* 微嵌互联官网 v2 样式：品牌色取自 logo（深蓝→天蓝 + 橙点），工业风、留白、实物图为主 */
:root {
  --deep: #1d2b7a; --blue: #0a5ea8; --sky: #00a0e9; --orange: #f08a1c;
  --ink: #141b2d; --text: #2a3346; --muted: #626d82; --line: #e2e7ef; --soft: #f5f7fb;
  --grad: linear-gradient(120deg, #1d2b7a 0%, #0a5ea8 55%, #00a0e9 100%);
  --w: 1200px; --r: 10px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font: 16px/1.75 -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif; color: var(--text); }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
:focus-visible { outline: 3px solid var(--orange); outline-offset: 2px; }
img { max-width: 100%; height: auto; display: block; }
h1, h2, h3 { color: var(--ink); line-height: 1.35; }
.wrap { max-width: var(--w); margin: 0 auto; padding: 0 24px; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 8px; background: #fff; padding: 8px 12px; z-index: 99; }

/* 顶栏 + 页头 */
.topbar { background: var(--ink); color: #b9c2d3; font-size: 13px; }
.topbar .wrap { display: flex; justify-content: space-between; height: 36px; align-items: center; }
.topbar a { color: #e3e8f2; }
.hd { position: sticky; top: 0; z-index: 20; background: #fff; box-shadow: 0 1px 0 var(--line); }
.hd .wrap { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 20px; color: var(--deep); }
.brand small { display: block; font-size: 11px; font-weight: 400; color: var(--muted); letter-spacing: .5px; }
.brand:hover { text-decoration: none; }
.nav { display: flex; gap: 30px; align-items: center; }
.nav a { color: var(--text); font-size: 15px; }
.nav a:hover { color: var(--blue); text-decoration: none; }
.nav .cta { background: var(--orange); color: #fff; padding: 8px 18px; border-radius: 6px; font-weight: 600; }

/* 首屏 */
.hero { background: var(--grad); color: #fff; overflow: hidden; position: relative; }
.hero::before { content: ""; position: absolute; inset: 0;
  background: radial-gradient(circle at 85% 20%, rgba(255,255,255,.14), transparent 45%),
              repeating-linear-gradient(90deg, rgba(255,255,255,.04) 0 1px, transparent 1px 60px); }
.hero .wrap { position: relative; display: grid; grid-template-columns: 1.05fr 1fr; gap: 40px; align-items: center; padding-top: 72px; padding-bottom: 72px; }
.eyebrow { display: inline-block; font-size: 13px; letter-spacing: 1px; padding: 4px 12px; border: 1px solid rgba(255,255,255,.4); border-radius: 20px; margin-bottom: 18px; }
.hero h1 { color: #fff; font-size: 44px; margin: 0 0 18px; }
.hero h1 em { font-style: normal; color: #ffd08a; }
.hero p { font-size: 17px; opacity: .92; margin: 0 0 30px; max-width: 560px; }
.hero-img { background: #fff; border-radius: 16px; padding: 18px; box-shadow: 0 30px 60px rgba(0,0,0,.25); transform: rotate(1.5deg); }
.btn { display: inline-block; padding: 13px 28px; border-radius: 6px; font-weight: 600; font-size: 16px; }
.btn:hover { text-decoration: none; filter: brightness(1.07); }
.btn-main { background: var(--orange); color: #fff; }
.btn-line { border: 1px solid rgba(255,255,255,.75); color: #fff; margin-left: 12px; }
.btn-blue { background: var(--blue); color: #fff; }

/* 信任条 */
.trust { background: #fff; border-bottom: 1px solid var(--line); }
.trust .wrap { display: grid; grid-template-columns: repeat(4, 1fr); }
.trust div { padding: 26px 20px; border-right: 1px solid var(--line); }
.trust div:last-child { border-right: 0; }
.trust b { display: block; font-size: 28px; color: var(--deep); line-height: 1.2; }
.trust span { font-size: 14px; color: var(--muted); }

/* 区块通用 */
section { padding: 88px 0; }
.soft { background: var(--soft); }
.sec-hd { display: flex; justify-content: space-between; align-items: end; gap: 24px; margin-bottom: 40px; }
.sec-hd.center { display: block; text-align: center; }
.sec-hd h2 { font-size: 32px; margin: 0; }
.sec-hd p { color: var(--muted); margin: 6px 0 0; }
.kicker { color: var(--orange); font-weight: 700; font-size: 13px; letter-spacing: 2px; }
.grid { display: grid; gap: 24px; }
.g2 { grid-template-columns: repeat(2, 1fr); } .g3 { grid-template-columns: repeat(3, 1fr); } .g4 { grid-template-columns: repeat(4, 1fr); }

/* 产品卡 */
.pcard { background: #fff; border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; display: flex; flex-direction: column; transition: box-shadow .2s, transform .2s; }
.pcard:hover { box-shadow: 0 14px 34px rgba(13,40,90,.13); transform: translateY(-3px); }
.pcard img { aspect-ratio: 1; object-fit: cover; border-bottom: 1px solid var(--line); }
.pcard .bd { padding: 18px 20px 20px; flex: 1; display: flex; flex-direction: column; }
.pcard h3 { font-size: 17px; margin: 0 0 6px; }
.pcard p { font-size: 14px; color: var(--muted); margin: 0 0 12px; flex: 1; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chips span { font-size: 12px; background: #eef4fb; color: var(--blue); padding: 2px 8px; border-radius: 4px; }

/* 应用场景 */
.scene { position: relative; border-radius: var(--r); padding: 30px 26px; color: #fff; min-height: 200px; background: var(--grad); overflow: hidden; }
.scene:nth-child(2) { background: linear-gradient(135deg, #0f3a62, #14836f); }
.scene:nth-child(3) { background: linear-gradient(135deg, #3b2a7a, #0a5ea8); }
.scene:nth-child(4) { background: linear-gradient(135deg, #1b2438, #34507a); }
.scene h3 { color: #fff; margin: 0 0 8px; font-size: 19px; }
.scene p { margin: 0; font-size: 14px; opacity: .9; }
.scene .n { position: absolute; right: 18px; bottom: -10px; font-size: 84px; font-weight: 800; opacity: .12; }

/* 优势 + 流程 */
.why { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.why div { border-top: 3px solid var(--blue); padding-top: 18px; }
.why h3 { margin: 0 0 6px; font-size: 18px; }
.why p { margin: 0; color: var(--muted); font-size: 14px; }
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; counter-reset: s; margin-top: 56px; }
.steps div { position: relative; text-align: center; padding: 0 10px; }
.steps div::before { counter-increment: s; content: counter(s, decimal-leading-zero); display: grid; place-items: center; width: 54px; height: 54px; margin: 0 auto 12px; border-radius: 50%; background: #fff; border: 2px solid var(--blue); color: var(--blue); font-weight: 700; position: relative; z-index: 1; }
.steps div::after { content: ""; position: absolute; top: 27px; left: 50%; width: 100%; height: 2px; background: #c9d6ea; }
.steps div:last-child::after { display: none; }
.steps b { display: block; color: var(--ink); }
.steps span { font-size: 13px; color: var(--muted); }

/* 资质 + 资源 + 联系 */
.certs { display: grid; grid-template-columns: 1fr 2fr; gap: 24px; align-items: stretch; }
.certs figure { margin: 0; background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 16px; }
.certs figcaption { text-align: center; font-size: 14px; color: var(--muted); margin-top: 10px; }
.res { background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 28px; }
.res h3 { margin: 6px 0 8px; } .res p { color: var(--muted); font-size: 15px; margin: 0 0 14px; }
.tag { font-size: 12px; padding: 2px 8px; border-radius: 4px; background: #fff3e4; color: #a85a00; }
.contact { background: var(--grad); color: #fff; border-radius: 16px; padding: 48px; display: grid; grid-template-columns: 1.2fr 1fr; gap: 40px; }
.contact h2 { color: #fff; margin: 0 0 10px; font-size: 30px; }
.contact dl { margin: 0; display: grid; grid-template-columns: 72px 1fr; row-gap: 14px; font-size: 15px; }
.contact dt { opacity: .75; } .contact dd { margin: 0; } .contact a { color: #fff; font-weight: 600; }

/* 页脚 */
.ft { background: var(--ink); color: #9aa4b8; font-size: 14px; padding: 56px 0 26px; margin-top: 88px; }
.ft .cols { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 32px; margin-bottom: 36px; }
.ft h4 { color: #fff; margin: 0 0 12px; font-size: 15px; }
.ft a { color: #c8d0de; display: block; line-height: 2.1; }
.ft .legal { border-top: 1px solid #263049; padding-top: 20px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }
.ft .legal a { display: inline; }
.ph { background: #fff3c4; color: #333; padding: 0 4px; border-radius: 3px; }

@media (max-width: 960px) {
  .hero .wrap, .contact, .certs { grid-template-columns: 1fr; }
  .g4, .why, .trust .wrap, .ft .cols { grid-template-columns: 1fr 1fr; }
  .g3 { grid-template-columns: 1fr 1fr; } .steps { grid-template-columns: 1fr 1fr 1fr; row-gap: 28px; }
  .nav a:not(.cta) { display: none; } .hero h1 { font-size: 34px; } .sec-hd { display: block; }
}
@media (max-width: 560px) {
  .g4, .g3, .g2, .why, .ft .cols, .steps { grid-template-columns: 1fr; }
  .steps div::after { display: none; } .contact { padding: 30px 22px; } .btn-line { margin: 12px 0 0; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; scroll-behavior: auto !important; } }
.ft a.brand { display: flex; }
.certs > figure { align-self: start; }
html, body { overflow-x: hidden; }

/* —— 预览：多站切换栏 + 微嵌平台卡片（sites.js 生成） —— */
.sitebar { background: var(--ink); font-size: 13px; }
.sitebar .wrap { display: flex; justify-content: space-between; align-items: center; height: 40px; }
.sitebar nav { display: flex; height: 100%; }
.sitebar nav a { display: flex; align-items: center; gap: 6px; padding: 0 16px; color: #c3cbd9; border-right: 1px solid #263049; }
.sitebar nav a:first-child { border-left: 1px solid #263049; }
.sitebar nav a span { color: #7f8aa0; font-size: 12px; }
.sitebar nav a:hover { color: #fff; text-decoration: none; background: #1c2540; }
.sitebar nav a.on { color: #fff; background: var(--blue); }
.sitebar nav a.on span { color: #cfe3ff; }
.sitebar .tel { color: #b9c2d3; } .sitebar .tel a { color: #fff; }
.wq-platform { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 24px; }
.plat { display: block; background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 28px; color: var(--text); transition: box-shadow .2s, transform .2s; border-top: 4px solid var(--blue); }
.plat:hover { text-decoration: none; box-shadow: 0 14px 34px rgba(13,40,90,.13); transform: translateY(-3px); }
.plat h3 { margin: 10px 0 8px; font-size: 22px; } .plat h3 small { font-size: 14px; color: var(--muted); font-weight: 400; }
.plat p { color: var(--muted); font-size: 15px; margin: 0 0 16px; } .plat b { color: var(--blue); }
.hero .wq-platform .plat { background: rgba(255,255,255,.96); }
.preview-note { background: #fff3c4; color: #5a4300; text-align: center; font-size: 13px; padding: 6px; }
@media (max-width: 760px) { .sitebar nav a span, .sitebar .tel { display: none; } .sitebar nav a { padding: 0 10px; } }

/* PCB 下单条（首页最下面） */
.pcb-band { padding: 48px 0; }
.pcb-card { display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap; border: 1px solid #dbe5f1; border-radius: 16px; padding: 32px 40px; background: #f5f9fd; }
.pcb-band h2 { margin: 0 0 6px; font-size: 26px; }
.pcb-band p { margin: 0; color: var(--muted); }
.btn-ghost { border: 1px solid var(--blue); color: var(--blue); margin-left: 12px; }
@media (max-width: 640px) { .pcb-card { padding: 24px; } .btn-ghost { margin-left: 0; margin-top: 10px; } }