/* ============================================
   SSIT Vehicles — design tokens
   Swiss minimal: white / black / red (#d80027)
   基调: 大字编辑风, 全大写grotesque, 红只做行动点
   ============================================ */
:root {
  --red: #d80027;
  --red-dark: #a8001f;
  --ink: #141414;
  --grey: #6b6b6b;
  --line: #e5e5e5;
  --dark: #0c0f16;
  --sans: "Helvetica Neue", Helvetica, "Segoe UI", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: var(--sans); color: var(--ink); font-size: 16px; line-height: 1.6; background: #fff; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
.container { max-width: 1240px; margin: 0 auto; padding: 0 32px; }

/* ---------- typographic rhythm ---------- */
.kicker { font-size: 13px; font-weight: 700; letter-spacing: .18em; text-transform: uppercase; }
.kicker--red { color: var(--red); }
.section-sub { font-size: clamp(24px, 3.2vw, 40px); font-weight: 700; line-height: 1.15; letter-spacing: -.01em; margin: 14px 0 10px; }
.section-note { color: var(--grey); max-width: 620px; }
section { padding: 88px 0; }

/* ---------- nav ---------- */
.nav { position: fixed; top: 0; left: 0; right: 0; z-index: 100; transition: background .25s ease; }
.nav--scrolled { background: rgba(255,255,255,.95); backdrop-filter: blur(8px); box-shadow: 0 1px 0 var(--line); }
.nav--scrolled .nav-links a, .nav--solid .nav-links a { color: var(--ink); }
.nav--scrolled .nav-links a:hover, .nav--scrolled .nav-links a.active,
.nav--solid .nav-links a:hover, .nav--solid .nav-links a.active { color: var(--red); }
.nav .container { display: flex; align-items: center; justify-content: space-between; height: 84px; }
.nav-logo { display: flex; align-items: center; }
.nav-logo img { height: 34px; width: auto; display: block; }
.nav-links { display: flex; gap: 34px; }
.nav-links a { position: relative; color: #fff; font-size: 13px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; opacity: .85; padding: 6px 0; transition: color .2s, opacity .2s; }
.nav-links a::after { content: ""; position: absolute; left: 0; bottom: 0; width: 0; height: 2px; background: var(--red); transition: width .25s ease; }
.nav-links a:hover { color: var(--red); opacity: 1; }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-links a.active { color: var(--red); opacity: 1; }
.nav--solid { position: fixed; background: #fff; box-shadow: 0 1px 0 var(--line); }   /* 内页常驻白底 */
body:has(.nav--solid) { padding-top: 84px; }   /* 固定后给内容让位 */

/* ---------- buttons ---------- */
.btn { display: inline-block; background: var(--red); color: #fff; font-size: 13px; font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase; padding: 15px 30px; border-radius: 999px; border: 0; cursor: pointer;
  transition: background .2s; }
.btn:hover { background: var(--red-dark); }
.btn .arr { margin-left: 8px; }
.link-red { color: var(--red); font-weight: 700; font-size: 13px; letter-spacing: .12em; text-transform: uppercase; }
.link-red:hover { color: var(--red-dark); }

/* ---------- hero ---------- */
.hero { position: relative; min-height: 92vh; display: flex; align-items: flex-end; background: var(--dark); overflow: hidden; }
.hero video, .hero .hero-fallback { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hero .hero-fallback { background: linear-gradient(135deg, #10141d 0%, #1a2233 55%, #0c0f16 100%); }
.hero::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(12,15,22,.45) 0%, rgba(12,15,22,.25) 45%, rgba(12,15,22,.72) 100%); }
.hero .container { position: relative; z-index: 2; padding-bottom: 84px; width: 100%; }
.hero h1 { color: #fff; font-size: clamp(38px, 5.6vw, 76px); font-weight: 700; line-height: 1.06; letter-spacing: .01em; text-transform: uppercase; max-width: 15ch; }
.hero p { color: rgba(255,255,255,.82); margin: 20px 0 34px; font-size: 17px; max-width: 52ch; }
/* TODO(素材): hero 视频文件落到 site/img/hero.mp4 后,把 index.html 里 .hero-fallback 换成 <video autoplay muted loop playsinline> */

/* ---------- trust bar ---------- */
.trust { padding: 64px 0; border-bottom: 1px solid var(--line); }
.trust-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px 32px; }
.trust-item { text-align: center; }
.trust-item .t-ico { height: 52px; margin-bottom: 14px; display: flex; align-items: flex-end; justify-content: center; }
.trust-item .t-ico svg { width: 46px; height: 46px; stroke: var(--ink); fill: none; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
.trust-item strong { display: block; font-size: 16px; font-weight: 700; text-transform: capitalize; }
.trust-item span { color: var(--grey); font-size: 13.5px; }

/* ---------- range / cards ---------- */
.range-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 44px; max-width: 1160px; }
.range-grid--home { grid-template-columns: repeat(3, 1fr); max-width: 1160px; }
.car-card { position: relative; display: block; border-radius: 14px; overflow: hidden; background: #f4f4f5; aspect-ratio: 4/3;
  transition: transform .3s, box-shadow .3s; }
.car-card:hover { transform: translateY(-4px); box-shadow: 0 14px 34px rgba(12,15,22,.14); }
.car-card .cc-img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: opacity .45s ease, transform .6s ease; }
.car-card .cc-img--alt { opacity: 0; }
.car-card:hover .cc-img--alt { opacity: 1; }
.car-card:hover .cc-img--main { transform: scale(1.03); }
.car-card .cc-veil { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(12,15,22,.34) 0%, rgba(12,15,22,0) 34%, rgba(12,15,22,0) 55%, rgba(12,15,22,.5) 100%); }
.car-card .cc-name { position: absolute; top: 18px; left: 18px; right: 18px; color: #fff; font-size: 19px; font-weight: 700; line-height: 1.25; text-shadow: 0 1px 8px rgba(0,0,0,.35); }
.car-card .cc-specs { position: absolute; left: 18px; bottom: 46px; display: flex; gap: 8px; flex-wrap: wrap; }
.car-card .cc-specs em { font-style: normal; color: #fff; font-size: 11.5px; font-weight: 600; letter-spacing: .04em; background: rgba(12,15,22,.55); backdrop-filter: blur(4px); padding: 5px 10px; border-radius: 999px; }
.car-card .cc-more { position: absolute; left: 18px; bottom: 16px; color: #fff; font-size: 12px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; }
.car-card .cc-more b { color: var(--red); }
.car-card .cc-badges { position: absolute; top: 18px; right: 18px; display: flex; gap: 6px; }
.car-card .cc-status { font-size: 10.5px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: #fff; background: rgba(12,15,22,.55); backdrop-filter: blur(4px); padding: 5px 10px; border-radius: 999px; }
.car-card .cc-hot { font-size: 10.5px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; color: #fff; background: var(--red); padding: 5px 10px; border-radius: 999px; }
.cc-name { padding-right: 90px; }
/* 特价角标: offer=true 时显示 */
.car-card .cc-offer { background: var(--red); color: #fff; font-size: 10.5px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; padding: 5px 10px; border-radius: 999px; animation: offerPulse 2.4s ease-in-out infinite; }
@keyframes offerPulse { 0%,100% { box-shadow: 0 0 0 0 rgba(216,0,39,.45); } 50% { box-shadow: 0 0 0 8px rgba(216,0,39,0); } }
.car-card .cc-price { position: absolute; left: 18px; bottom: 46px; color: #fff; font-weight: 800; font-size: 20px; }
.car-card .cc-price s { color: rgba(255,255,255,.65); font-weight: 500; font-size: 14px; margin-left: 8px; }

/* 特价专区 */
.offers-band { position: relative; background: var(--dark) url("../img/offers-band.jpg") center 30% / cover no-repeat; color: #fff; }
.offers-band::before { content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(90deg, rgba(20,14,10,.72) 0%, rgba(20,14,10,.45) 42%, rgba(20,14,10,.15) 100%); }
.offers-band .container { position: relative; }
.offers-band .section-note { color: rgba(255,255,255,.7); }

/* 分组标题 */
.group-title { font-size: clamp(22px, 2.6vw, 32px); font-weight: 800; letter-spacing: .04em; text-transform: uppercase; margin: 72px 0 6px; }
.group-title:first-of-type { margin-top: 40px; }
.status-line { margin-top: 26px; font-size: 13px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--ink); }
.status-line span { color: var(--grey); font-weight: 600; }

/* ---------- why us ---------- */
.why-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 48px; }
.why-item { border: 1px solid rgba(216,0,39,.45); border-radius: 14px; padding: 26px; background: #fff;
  transition: border-color .3s; }
.why-item:hover { border-color: var(--red); }
.why-ico { width: 52px; height: 52px; border-radius: 50%; background: rgba(216,0,39,.07);
  display: grid; place-items: center; color: var(--red); margin-bottom: 16px; }
.why-ico svg { width: 24px; height: 24px; }
.why-item h3 { font-size: 14px; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; margin-bottom: 10px; }
.why-item p { color: var(--grey); font-size: 15px; }
@keyframes whyUp { from { opacity: 0; transform: translateY(40px); } to { opacity: 1; transform: none; } }
.why-grid.reveal .why-item { opacity: 0; }
.why-grid.reveal.on .why-item { animation: whyUp .9s ease both; }
.why-grid.reveal.on .why-item:nth-child(2) { animation-delay: .4s; }
.why-grid.reveal.on .why-item:nth-child(3) { animation-delay: .8s; }
.why-grid.reveal.on .why-item:nth-child(4) { animation-delay: 1.2s; }
.why-grid.reveal.on .why-item:nth-child(5) { animation-delay: 1.6s; }
.why-grid.reveal.on .why-item:nth-child(6) { animation-delay: 2.0s; }

/* 首页车卡渐入(与 why 同一套丝绸站节奏; 用 backwards 填充+落定 opacity 1, 不占用 hover transform) */
.range-grid--home.reveal .car-card { opacity: 0; }
.range-grid--home.reveal.on .car-card { opacity: 1; animation: whyUp .9s ease backwards; }
.range-grid--home.reveal.on .car-card:nth-child(2) { animation-delay: .4s; }
.range-grid--home.reveal.on .car-card:nth-child(3) { animation-delay: .8s; }
.range-grid--home.reveal.on .car-card:nth-child(4) { animation-delay: 1.2s; }
.range-grid--home.reveal.on .car-card:nth-child(5) { animation-delay: 1.6s; }
.range-grid--home.reveal.on .car-card:nth-child(6) { animation-delay: 2.0s; }

/* ---------- faq ---------- */
.faq { background: #fff; }
.faq-list { margin-top: 44px; border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item button { width: 100%; background: none; border: 0; color: var(--ink); text-align: left; font: inherit; font-weight: 600; font-size: 17px; padding: 22px 40px 22px 0; cursor: pointer; position: relative; transition: color .2s; }
.faq-item button:hover { color: var(--red); }
.faq-item button::after { content: ""; position: absolute; right: 6px; top: 50%; width: 10px; height: 10px; border-right: 2px solid var(--red); border-bottom: 2px solid var(--red); transform: translateY(-70%) rotate(45deg); transition: transform .25s; }
.faq-item.open button::after { transform: translateY(-30%) rotate(225deg); }
.faq-item .faq-a { max-height: 0; overflow: hidden; transition: max-height .3s ease; color: var(--grey); font-size: 15px; }
.faq-item.open .faq-a { max-height: 300px; }
.faq-item .faq-a p { padding: 0 40px 24px 0; }

/* ---------- footer (浅色系, 对齐 SSIT Silk 中文版脚页) ---------- */
.footer { background: #fafaf8; color: var(--ink); padding: 64px 0 0; border-top: 1px solid var(--line); }
.footer-cta { position: relative; display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap;
  padding: 100px 48px; margin-bottom: 48px; border-radius: 16px; overflow: hidden;
  background: url("../img/footer-cta.jpg") center/cover no-repeat; }
.footer-cta::before { content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(12,15,22,.78) 0%, rgba(12,15,22,.45) 55%, rgba(12,15,22,.18) 100%); }
.footer-cta > * { position: relative; z-index: 1; }
.footer-cta h2 { font-size: clamp(22px, 3vw, 34px); font-weight: 700; max-width: 22ch; color: #fff; }

/* ---------- full-bleed CTA (首页脚前全屏横幕) ---------- */
.cta-full { position: relative; overflow: hidden; color: #fff; min-height: 62vh; display: flex; align-items: center;
  background: var(--dark) url("../img/footer-cta.jpg") center/cover no-repeat; }
.cta-full::before { content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(90deg, rgba(12,15,22,.82) 0%, rgba(12,15,22,.50) 55%, rgba(12,15,22,.20) 100%); }
.cta-full-in { position: relative; z-index: 1; width: 100%; }
.cta-full-in .btn { margin-top: 26px; }
.cta-full h2 { font-size: clamp(20px, 2.6vw, 30px); font-weight: 700; max-width: 34ch; line-height: 1.3; color: #fff; }

.footer-mid { display: grid; grid-template-columns: 1.1fr .8fr 1.3fr; gap: 56px; padding-bottom: 52px; }
.footer-brand img { height: 34px; width: auto; display: block; }
.footer-brand .div-name { margin-top: 14px; font-size: 15px; font-weight: 700; letter-spacing: .1em; color: var(--ink); }
.footer-brand .tagline { color: var(--grey); font-size: 14px; margin-top: 8px; max-width: 340px; }
.footer-col h4 { font-size: 13px; letter-spacing: .14em; text-transform: uppercase; color: var(--red); margin-bottom: 20px; font-weight: 700; }
.footer-col a { display: block; font-size: 13.5px; letter-spacing: .08em; text-transform: uppercase; color: #444; padding: 7px 0; transition: color .2s; }
.footer-mail { color: var(--ink); font-size: 15.5px; font-weight: 700; display: inline-block; margin-bottom: 22px; }
.footer-mail:hover { color: var(--red); }
.footer-addr > div { margin-bottom: 20px; }
.footer-addr h5 { font-size: 12px; letter-spacing: .1em; text-transform: uppercase; color: var(--ink); margin-bottom: 6px; font-weight: 700; }
.addr-line { color: #555; font-size: 13.5px; line-height: 1.65; }
.addr-role { color: var(--grey); font-size: 12px; letter-spacing: .06em; margin-top: 4px; }
.footer-bottom { background: var(--red); color: #fff; text-align: center; padding: 16px 20px; font-size: 13.5px; letter-spacing: .05em; }
.footer-col a:hover { color: var(--red); }

/* ---------- detail page ---------- */
.detail-hero { padding: 150px 0 30px; }
.detail-hero h1 { font-size: clamp(34px, 4.6vw, 60px); font-weight: 800; letter-spacing: -.01em; }
.detail-hero .pos { color: var(--grey); font-size: 17px; margin-top: 8px; }
.detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 34px; }
.detail-grid figure { border-radius: 12px; overflow: hidden; background: #f4f4f5; position: relative; aspect-ratio: 4/3; }
.detail-grid figure img { width: 100%; height: 100%; object-fit: cover; }
.detail-grid figcaption { position: absolute; left: 14px; bottom: 12px; color: #fff; font-size: 11px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; background: rgba(12,15,22,.55); backdrop-filter: blur(4px); padding: 4px 10px; border-radius: 999px; }
.keyspec { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 44px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 30px 0; }
.keyspec div strong { display: block; font-size: 24px; font-weight: 800; }
.keyspec div span { color: var(--grey); font-size: 12.5px; letter-spacing: .08em; text-transform: uppercase; }
.spec-table { width: 100%; border-collapse: collapse; margin-top: 30px; font-size: 15px; }
.spec-table th, .spec-table td { text-align: left; padding: 13px 14px; border-bottom: 1px solid var(--line); }
.spec-table th { font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--grey); font-weight: 700; }
.trim-note { color: var(--grey); font-size: 13.5px; margin-top: 12px; }
.detail-cta { position: relative; overflow: hidden; margin-top: 56px; color: #fff; border-radius: 16px; padding: 44px;
  background: var(--dark) url("../img/detail-cta.jpg") center/cover no-repeat; }
.detail-cta::before { content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(90deg, rgba(16,10,6,.82) 0%, rgba(16,10,6,.55) 45%, rgba(16,10,6,.20) 100%); }
.detail-cta > * { position: relative; z-index: 1; }
.detail-cta .btn { margin-top: 24px; }
.detail-cta h2 { font-size: clamp(20px, 2.4vw, 28px); max-width: 30ch; }
.detail-cta .alt { margin-top: 12px; font-size: 13.5px; color: rgba(255,255,255,.65); }
.detail-cta .alt a { color: #fff; text-decoration: underline; }

/* ---------- contact ---------- */
.contact-hero { padding: 150px 0 40px; }
.contact-form { max-width: 640px; margin-top: 40px; }
.contact-form label { display: block; font-size: 12px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--grey); margin: 22px 0 8px; }
.contact-form input, .contact-form textarea, .contact-form select { width: 100%; border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; font: inherit; font-size: 15px; background: #fff; }
.contact-form input:focus, .contact-form textarea:focus, .contact-form select:focus { outline: 2px solid var(--red); outline-offset: -1px; border-color: transparent; }
.contact-form input[type="checkbox"] { width: 18px; height: 18px; padding: 0; border-radius: 4px; accent-color: var(--red); margin: 0; flex: 0 0 auto; cursor: pointer; }
.contact-form input[type="checkbox"]:focus { outline: none; border-color: var(--line); }
.contact-form .cf-check { display: flex; gap: 10px; align-items: center; font-size: 13px; color: var(--grey); text-transform: none; letter-spacing: 0; cursor: pointer; }
.contact-form textarea { min-height: 140px; resize: vertical; }
.contact-form .btn { margin-top: 26px; }
.form-note { margin-top: 14px; font-size: 14px; }
.form-note.ok { color: #0a7a3d; }
.form-note.err { color: var(--red); }
.addr-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; margin-top: 34px; }
.addr-grid h3 { font-size: 13px; letter-spacing: .14em; text-transform: uppercase; margin-bottom: 8px; }
.addr-grid p { color: var(--grey); font-size: 15px; }

/* ---------- inquiry band (products 底部) ---------- */
.inquiry { position: relative; overflow: hidden; color: #fff;
  background: var(--dark) url("../img/inquiry-band.jpg") center/cover no-repeat; }
.inquiry::before { content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(90deg, rgba(16,10,6,.78) 0%, rgba(16,10,6,.48) 45%, rgba(16,10,6,.18) 100%); }
.inquiry .container { position: relative; z-index: 1; }
.inquiry p { font-size: clamp(20px, 2.6vw, 30px); font-weight: 700; max-width: 34ch; line-height: 1.3; }
.inquiry .btn { margin-top: 26px; }

/* ---------- responsive ---------- */
@media (max-width: 960px) {
  .trust-grid, .why-grid { grid-template-columns: repeat(2, 1fr); }
  .range-grid { grid-template-columns: repeat(2, 1fr); }
  .keyspec { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 620px) {
  .container { padding: 0 20px; }
  section { padding: 60px 0; }
  .nav-links { gap: 18px; }
  .nav-links a { font-size: 11px; }
  .range-grid, .range-grid--home, .trust-grid, .why-grid, .addr-grid { grid-template-columns: 1fr; }
  .car-card { aspect-ratio: 4/3; }
  .hero { min-height: 78vh; }
  /* 详情页四宫格 → 移动端横向滑动大卡(璇玑建议: 小屏四宫格看不清, 拆单图横滑) */
  .detail-grid { display: flex; overflow-x: auto; scroll-snap-type: x mandatory; gap: 12px;
    margin-left: -20px; margin-right: -20px; padding: 0 20px; scrollbar-width: none; }
  .detail-grid::-webkit-scrollbar { display: none; }
  .detail-grid figure { flex: 0 0 86%; scroll-snap-align: center; }
}

/* ---------- detail back link ---------- */
.back-link { position: fixed; top: 108px; left: 32px; z-index: 90; display: inline-block; color: #fff; background: var(--dark); padding: 10px 18px; border-radius: 999px; font-size: 12px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; box-shadow: 0 6px 20px rgba(12,15,22,.28); transition: background .2s; }
.back-link:hover { background: var(--red); }
.back-link:hover b { color: #fff; }
.back-link b { color: var(--red); margin-right: 6px; }
@media (max-width: 720px) { .back-link { top: 96px; left: 16px; } }

/* ---------- nav logo: 透明态白logo / 白底态黑logo ---------- */
.nav-logo .logo-w { display: none; }
.nav:not(.nav--solid):not(.nav--scrolled) .logo-d { display: none; }
.nav:not(.nav--solid):not(.nav--scrolled) .logo-w { display: block; }

/* ---------- card footer: status + cert ---------- */
.car-card .cc-foot { position: absolute; left: 18px; right: 18px; bottom: 14px; display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.car-card .cc-foot .cc-status { position: static; }
.car-card .cc-cert { font-size: 10.5px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: #fff; border: 1px solid rgba(255,255,255,.75); padding: 4px 10px; border-radius: 999px; margin-left: auto; }
.car-card .cc-cond { font-size: 10.5px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: rgba(255,255,255,.85); border: 1px solid rgba(255,255,255,.45); padding: 4px 10px; border-radius: 999px; margin-left: 8px; }

/* ---------- detail img disclaimer ---------- */
.img-note { color: var(--grey); font-size: 12.5px; margin-top: 14px; }

/* ---------- MOQ chip: 白底深字红标 ---------- */
.car-card .cc-moq { background: rgba(255,255,255,.92) !important; color: var(--ink) !important; }
.car-card .cc-moq b { color: var(--red); font-weight: 800; }

/* ---------- v2 文案新增组件 ---------- */
.hero h1 .red { color: var(--red); }
.btn-ghost { background: transparent; border: 1.5px solid rgba(255,255,255,.85); }
.btn-ghost:hover { background: rgba(255,255,255,.12); border-color: #fff; }

/* How it works 五步 */
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 22px; margin-top: 48px; position: relative; }
.step { position: relative; z-index: 1; }
.step::before { content: ""; position: absolute; top: 27px; left: 28px; width: calc(100% + 22px); height: 2px; background: var(--line); z-index: -1; }
.step::after { content: ""; position: absolute; top: 27px; left: 28px; width: 0; height: 2px; background: var(--red); z-index: -1;
  transition: width .5s cubic-bezier(.4,0,.2,1); }
.step:last-child::before, .step:last-child::after { display: none; }
.steps.on .step::after { width: calc(100% + 22px); }
.steps.on .step:nth-child(2)::after { transition-delay: .5s; }
.steps.on .step:nth-child(3)::after { transition-delay: 1.0s; }
.steps.on .step:nth-child(4)::after { transition-delay: 1.5s; }
.steps.on .step:nth-child(5)::after { transition-delay: 2.0s; }
.step-node { width: 56px; height: 56px; border-radius: 50%; background: #fff; border: 2px solid var(--line);
  display: grid; place-items: center; color: #b0b4ba; transition: border-color .45s, color .45s; }
.step-node svg { width: 26px; height: 26px; }
.steps.on .step:nth-child(1) .step-node { transition-delay: .1s; }
.steps.on .step:nth-child(2) .step-node { transition-delay: .55s; }
.steps.on .step:nth-child(3) .step-node { transition-delay: 1.05s; }
.steps.on .step:nth-child(4) .step-node { transition-delay: 1.55s; }
.steps.on .step:nth-child(5) .step-node { transition-delay: 2.05s; }
.steps.on .step .step-node { border-color: var(--red); color: var(--red); }
.step-n { display: inline-block; font-size: 12px; font-weight: 800; color: var(--red); letter-spacing: .14em; text-transform: uppercase; margin: 14px 0 8px; }
.step p { font-size: 13.5px; line-height: 1.6; color: var(--grey); }
.step p b { color: var(--ink); font-weight: 700; }

/* Insights 文章卡 */
.insight-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 40px; }
.insight-card { border: 1px solid rgba(216,0,39,.45); border-radius: 14px; padding: 26px; display: flex; flex-direction: column; gap: 12px; background: #fff;
  transition: transform .3s, box-shadow .3s, border-color .3s; }
.insight-card:hover { transform: translateY(-4px); border-color: var(--red); box-shadow: 0 14px 34px rgba(12,15,22,.10); }
.insight-card .tag { font-size: 11px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; color: var(--red); }
.insight-card h3 { font-size: 19px; font-weight: 700; line-height: 1.35; }
.insight-card p { font-size: 13.5px; line-height: 1.6; color: var(--grey); flex: 1; }
.insight-card .meta { font-size: 12px; color: var(--grey); letter-spacing: .06em; }

/* About 数字带/业务卡 */
.about-nums { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 40px; }
.about-nums div strong { display: block; font-size: 26px; font-weight: 800; color: var(--ink); }
.about-nums div span { font-size: 13px; color: var(--grey); }
@media (max-width: 1000px) { .insight-grid { grid-template-columns: repeat(2, 1fr); } .about-nums { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; gap: 30px; }
  .step { display: flex; gap: 20px; align-items: flex-start; }
  .step::before { top: 28px; left: 27px; width: 2px; height: calc(100% + 30px); }
  .step::after { top: 28px; left: 27px; width: 2px; height: 0; transition: height .5s cubic-bezier(.4,0,.2,1); }
  .steps.on .step::after { width: 2px; height: calc(100% + 30px); }
  .step-node { flex: 0 0 56px; }
  .step-n { margin-top: 4px; }
}
@media (max-width: 600px) { .insight-grid, .about-nums { grid-template-columns: 1fr; } }

/* ---------- 导航报价 pill + 详情页询价弹窗 ---------- */
.nav-links a.nav-cta { background: var(--red); color: #fff !important; padding: 9px 18px; border-radius: 999px; opacity: 1; }
.nav-links a.nav-cta::after { display: none; }
.nav-links a.nav-cta:hover { filter: brightness(.88); color: #fff; }
button.btn { border: 0; cursor: pointer; font-family: inherit; }

.qmodal { position: fixed; inset: 0; z-index: 300; background: rgba(8,10,14,.58); display: flex; align-items: center; justify-content: center; padding: 20px; }
.qmodal[hidden] { display: none; }
.qmodal-card { position: relative; background: #fff; border-radius: 16px; padding: 30px 30px 24px; width: 100%; max-width: 520px; max-height: 88vh; overflow: auto; box-shadow: 0 24px 80px rgba(0,0,0,.35);
  scrollbar-width: thin; scrollbar-color: rgba(12,15,22,.18) transparent; }
.qmodal-card::-webkit-scrollbar { width: 5px; }
.qmodal-card::-webkit-scrollbar-track { background: transparent; }
.qmodal-card::-webkit-scrollbar-thumb { background: rgba(12,15,22,.15); border-radius: 999px; }
.qmodal-card::-webkit-scrollbar-thumb:hover { background: rgba(216,0,39,.45); }
.qmodal-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 18px; padding-right: 36px; }
.qmodal-x { position: absolute; top: 14px; right: 16px; background: none; border: 0; font-size: 26px; line-height: 1; color: var(--grey); cursor: pointer; }
.qmodal-x:hover { color: var(--red); }
.qmodal-card .contact-form label { margin-top: 12px; }
.qmodal-card .contact-form .btn { margin-top: 18px; }

/* 蜜罐字段: 对人不可见 */
.hp-field { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }