:root {
  --bg: #050b14;
  --panel: rgba(10, 22, 39, .86);
  --panel-strong: #0d1d32;
  --line: rgba(101, 186, 255, .18);
  --text: #f4f8ff;
  --muted: #aebad0;
  --blue: #35b8ff;
  --cyan: #78fff0;
  --red: #ff425d;
  --gold: #f5c85b;
  --radius: 24px;
  --max: 1180px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.75;
  background:
    radial-gradient(circle at 12% 0%, rgba(53, 184, 255, .16), transparent 28%),
    radial-gradient(circle at 88% 12%, rgba(255, 66, 93, .12), transparent 26%),
    linear-gradient(180deg, #07111e 0%, var(--bg) 48%, #03070d 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(94, 165, 229, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(94, 165, 229, .045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(to bottom, #000 0%, transparent 78%);
}

a { color: inherit; text-decoration: none; }

.container { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }

.nav-wrap {
  position: sticky;
  top: 0;
  z-index: 20;
  padding: 14px 0;
  border-bottom: 1px solid rgba(120, 170, 255, .20);
  background: rgba(3, 9, 19, .88);
  backdrop-filter: blur(22px);
  box-shadow: 0 14px 38px rgba(0, 0, 0, .42);
}

.nav {
  width: min(var(--max), calc(100% - 36px));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand { display: flex; align-items: center; gap: 12px; font-weight: 900; letter-spacing: .04em; }
.nav-wrap .brand { min-width: 184px; }
.brand.no-logo { min-width: auto; gap: 0; }
.brand-title { color: #fff; font-size: 24px; font-weight: 1000; letter-spacing: .5px; line-height: 1; text-shadow: 0 0 18px rgba(53, 184, 255, .18); }
.brand-sub { margin-top: 4px; color: #8ea6c9; font-size: 11px; font-weight: 700; letter-spacing: 1.8px; }

.brand-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  color: #03111e;
  background: linear-gradient(135deg, var(--cyan), var(--blue));
  box-shadow: 0 0 28px rgba(53, 184, 255, .28);
}

.brand small { display: block; margin-top: -5px; color: #7f91ae; font-size: 9px; letter-spacing: .16em; }

.menu {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 7px;
  border: 1px solid rgba(120, 170, 255, .16);
  border-radius: 999px;
  background: rgba(255, 255, 255, .055);
  box-shadow: inset 0 0 24px rgba(53, 184, 255, .05);
}

.menu a {
  padding: 10px 15px;
  border-radius: 999px;
  color: #c6d4eb;
  font-size: 14px;
  font-weight: 800;
  white-space: nowrap;
  transition: .25s;
}

.menu a:hover,
.menu a.active {
  color: #fff;
  background: linear-gradient(135deg, #ff324f 0%, #263a75 48%, #35b8ff 100%);
  box-shadow: 0 0 24px rgba(53, 184, 255, .24), inset 0 0 16px rgba(255, 255, 255, .12);
}

.nav-actions { display: flex; align-items: center; gap: 10px; }
.btn { position: relative; display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 0 21px; overflow: hidden; border: 0; border-radius: 999px; font-weight: 1000; white-space: nowrap; transition: transform .2s ease, box-shadow .2s ease, filter .2s ease; }
.btn:hover { transform: translateY(-2px); }
.btn-primary { color: #fff; background: linear-gradient(135deg, #ff324f 0%, #283d7c 48%, #35b8ff 100%); box-shadow: 0 16px 36px rgba(53,184,255,.22), 0 0 0 1px rgba(255,255,255,.08) inset; }
.btn-soft { color: #f5f8ff; border: 1px solid rgba(120,170,255,.22); background: rgba(10,20,38,.76); }
.mobile-menu { display: none; }

.hero { padding: 56px 0 56px; }

.breadcrumbs { display: flex; align-items: center; gap: 9px; color: #8192ad; font-size: 14px; }
.breadcrumbs a {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid rgba(53, 184, 255, .2);
  border-radius: 10px;
  color: #b7c6da;
  background: rgba(53, 184, 255, .06);
  transition: .2s ease;
}
.breadcrumbs a:hover { color: var(--cyan); border-color: rgba(120, 255, 240, .36); background: rgba(53, 184, 255, .12); }
.breadcrumbs span { color: #56657c; }

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, .85fr);
  align-items: center;
  gap: 56px;
  margin-top: 26px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 12px;
  border: 1px solid rgba(53, 184, 255, .26);
  border-radius: 999px;
  color: #9fdcff;
  font-size: 12px;
  letter-spacing: .14em;
  background: rgba(53, 184, 255, .08);
}

.eyebrow::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 12px var(--cyan); }

h1 { margin: 20px 0 18px; font-size: clamp(38px, 6vw, 68px); line-height: 1.06; letter-spacing: -.045em; }
h1 span { display: block; color: transparent; background: linear-gradient(90deg, var(--blue), var(--cyan)); background-clip: text; }

.lead { max-width: 760px; margin: 0; color: #bac6d9; font-size: 18px; }

.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border-radius: 13px;
  border: 1px solid var(--line);
  font-weight: 750;
  background: rgba(255, 255, 255, .045);
}

.button.primary { color: #03101d; border-color: transparent; background: linear-gradient(135deg, var(--cyan), var(--blue)); }
.button:hover { transform: translateY(-1px); filter: brightness(1.08); }

.hero-panel {
  position: relative;
  min-height: 310px;
  padding: 30px;
  overflow: hidden;
  border: 1px solid rgba(101, 186, 255, .24);
  border-radius: 32px;
  background: linear-gradient(145deg, rgba(15, 37, 63, .92), rgba(7, 17, 30, .88));
  box-shadow: 0 30px 70px rgba(0, 0, 0, .36);
}

.hero-panel::before,
.hero-panel::after { content: ""; position: absolute; border-radius: 50%; filter: blur(2px); }
.hero-panel::before { width: 220px; height: 220px; right: -70px; top: -80px; background: radial-gradient(circle, rgba(53,184,255,.42), transparent 68%); }
.hero-panel::after { width: 190px; height: 190px; left: -60px; bottom: -90px; background: radial-gradient(circle, rgba(255,66,93,.26), transparent 68%); }

.panel-label { position: relative; z-index: 1; color: #7d90ab; font-size: 12px; letter-spacing: .16em; }
.panel-value { position: relative; z-index: 1; margin-top: 8px; font-size: 34px; font-weight: 900; }
.panel-list { position: relative; z-index: 1; display: grid; gap: 10px; margin-top: 34px; }
.panel-list div { display: flex; align-items: center; gap: 10px; padding: 11px 13px; border: 1px solid rgba(255,255,255,.08); border-radius: 13px; background: rgba(255,255,255,.035); color: #c7d3e6; font-size: 14px; }
.panel-list b { width: 24px; height: 24px; display: grid; place-items: center; flex: 0 0 auto; border-radius: 8px; color: #07111d; background: var(--cyan); }

.section { padding: 40px 0 84px; }
.section.alt { border-block: 1px solid rgba(101,186,255,.09); background: rgba(3,10,18,.35); }
.section-head { max-width: 760px; margin-bottom: 32px; }
.section-head h2 { margin: 8px 0 10px; font-size: clamp(28px, 4vw, 42px); line-height: 1.2; }
.section-head p { margin: 0; color: var(--muted); }
.kicker { color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: .15em; }

.cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.cards.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.card {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(145deg, rgba(15,31,52,.88), rgba(7,16,29,.8));
  box-shadow: inset 0 1px rgba(255,255,255,.035);
}

.card .number { color: var(--cyan); font-size: 12px; font-weight: 850; letter-spacing: .14em; }
.card h3 { margin: 9px 0 8px; font-size: 21px; }
.card p { margin: 0; color: var(--muted); }
.card ul { margin: 14px 0 0; padding-left: 20px; color: var(--muted); }
.card li + li { margin-top: 7px; }

.steps { display: grid; gap: 14px; counter-reset: step; }
.step { display: grid; grid-template-columns: 54px minmax(0, 1fr); gap: 18px; padding: 22px; border: 1px solid var(--line); border-radius: 20px; background: var(--panel); }
.step::before { counter-increment: step; content: counter(step, decimal-leading-zero); width: 48px; height: 48px; display: grid; place-items: center; border-radius: 14px; color: #03111e; font-weight: 900; background: linear-gradient(135deg, var(--cyan), var(--blue)); }
.step h3 { margin: 0 0 5px; }
.step p { margin: 0; color: var(--muted); }

.notice { padding: 22px 24px; border-left: 3px solid var(--gold); border-radius: 0 18px 18px 0; color: #d7dfeb; background: rgba(245, 200, 91, .07); }
.notice strong { color: var(--gold); }

.article-layout { display: grid; grid-template-columns: 240px minmax(0, 1fr); align-items: start; gap: 28px; }
.toc { position: sticky; top: 98px; padding: 20px; border: 1px solid var(--line); border-radius: 20px; background: rgba(8,18,32,.82); }
.toc strong { display: block; margin-bottom: 10px; }
.toc a { display: block; padding: 7px 0; color: #91a1ba; font-size: 14px; }
.toc a:hover { color: var(--blue); }

.article { padding: 34px clamp(22px, 5vw, 54px); border: 1px solid var(--line); border-radius: 28px; background: rgba(8,18,32,.84); }
.article h2 { margin: 40px 0 12px; padding-top: 6px; font-size: 25px; line-height: 1.35; }
.article h2:first-child { margin-top: 0; }
.article h3 { margin: 25px 0 7px; font-size: 18px; }
.article p, .article li { color: #bdc8da; }
.article ul, .article ol { padding-left: 22px; }
.article li + li { margin-top: 8px; }
.article .meta { margin: -2px 0 24px; color: #7f91ad; font-size: 14px; }
.article a { color: #73ceff; }

.faq { display: grid; gap: 12px; }
.faq details { border: 1px solid var(--line); border-radius: 17px; background: rgba(10,23,40,.82); }
.faq summary { padding: 18px 52px 18px 20px; cursor: pointer; list-style: none; font-weight: 750; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 20px; color: var(--cyan); font-size: 24px; line-height: 1; }
.faq details[open] summary::after { content: "−"; }
.faq p { margin: 0; padding: 0 20px 18px; color: var(--muted); }

.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.contact-card { padding: 28px; border: 1px solid var(--line); border-radius: 24px; background: var(--panel); }
.contact-card small { color: #7f91aa; letter-spacing: .1em; }
.contact-card h3 { margin: 7px 0 10px; }
.contact-card p { margin: 0; color: var(--muted); }
.contact-card a { color: var(--cyan); word-break: break-all; }

.catalog-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
.catalog-card { display: block; overflow: hidden; border: 1px solid var(--line); border-radius: 22px; background: linear-gradient(145deg, rgba(15,31,52,.9), rgba(7,16,29,.84)); transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease; }
.catalog-card:hover { transform: translateY(-5px); border-color: rgba(53,184,255,.48); box-shadow: 0 22px 48px rgba(0,0,0,.3), 0 0 28px rgba(53,184,255,.1); }
.catalog-media { position: relative; display: grid; place-items: center; aspect-ratio: 1 / 1; overflow: hidden; background: linear-gradient(145deg, #0d2a47, #08111e); }
.catalog-media::before { content: "MECHA"; color: rgba(120,255,240,.16); font-size: clamp(28px, 4vw, 48px); font-weight: 1000; letter-spacing: .12em; }
.catalog-media::after { content: "查看详情 →"; position: absolute; right: 14px; bottom: 14px; padding: 7px 11px; border-radius: 999px; color: #07111d; font-size: 12px; font-weight: 900; background: var(--cyan); opacity: 0; transform: translateY(6px); transition: .22s ease; }
.catalog-card:hover .catalog-media::after { opacity: 1; transform: translateY(0); }
.catalog-media img { position: absolute; inset: 0; z-index: 1; width: 100%; height: 100%; object-fit: cover; opacity: 0; transition: opacity .2s ease, transform .35s ease; }
.catalog-media img.is-loaded { opacity: 1; }
.catalog-card:hover .catalog-media img { transform: scale(1.045); }
.catalog-badge { position: absolute; top: 14px; left: 14px; z-index: 2; padding: 6px 10px; border: 1px solid rgba(255,255,255,.18); border-radius: 999px; color: #fff; font-size: 11px; font-weight: 900; letter-spacing: .08em; background: rgba(4,12,22,.78); backdrop-filter: blur(10px); }
.catalog-info { padding: 18px; }
.catalog-info h3 { min-height: 52px; margin: 0 0 10px; font-size: 17px; line-height: 1.5; }
.catalog-meta { display: flex; flex-wrap: wrap; gap: 6px; }
.catalog-meta span { padding: 4px 8px; border-radius: 8px; color: #9eb0c9; font-size: 11px; background: rgba(255,255,255,.05); }
.catalog-price { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; margin-top: 16px; padding-top: 13px; border-top: 1px solid rgba(101,186,255,.1); }
.catalog-price strong { color: var(--cyan); font-size: 23px; }
.catalog-price span { color: #7789a3; font-size: 12px; }

.detail-section { padding: 56px 0 84px; }
.detail-grid { display: grid; grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr); align-items: center; gap: 54px; margin-top: 26px; }
.detail-media { position: relative; display: grid; place-items: center; overflow: hidden; aspect-ratio: 1 / 1; border: 1px solid rgba(101,186,255,.24); border-radius: 30px; background: radial-gradient(circle at 70% 24%, rgba(53,184,255,.28), transparent 26%), linear-gradient(145deg, #102943, #07101c); box-shadow: 0 30px 70px rgba(0,0,0,.35); }
.detail-media::before { content: "MECHA MODEL"; color: rgba(120,255,240,.18); font-size: clamp(30px, 5vw, 62px); font-weight: 1000; letter-spacing: .08em; text-align: center; }
.detail-media img { position: absolute; inset: 0; z-index: 1; width: 100%; height: 100%; object-fit: cover; opacity: 0; transition: opacity .2s ease; }
.detail-media img.is-loaded { opacity: 1; }
.detail-media .catalog-badge { top: 20px; left: 20px; }
.detail-copy h1 { margin: 16px 0; font-size: clamp(36px, 5vw, 60px); line-height: 1.08; }
.detail-copy .lead { font-size: 17px; }
.detail-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.detail-tags span { padding: 7px 11px; border: 1px solid var(--line); border-radius: 999px; color: #a9bad0; font-size: 13px; background: rgba(255,255,255,.035); }
.detail-price { margin-top: 22px; color: var(--cyan); font-size: 34px; font-weight: 1000; }
.detail-price small { margin-left: 8px; color: #7d8da5; font-size: 12px; font-weight: 600; }
.spec-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.spec-item { padding: 20px; border: 1px solid var(--line); border-radius: 18px; background: var(--panel); }
.spec-item small { color: #71829c; font-size: 11px; letter-spacing: .1em; }
.spec-item strong { display: block; margin-top: 6px; font-size: 16px; }

.footer { padding: 42px 0 28px; border-top: 1px solid var(--line); background: rgba(2,7,13,.68); }
.footer-grid { display: grid; grid-template-columns: 1.3fr repeat(3, 1fr); gap: 30px; }
.footer h4 { margin: 0 0 12px; }
.footer p { max-width: 380px; margin: 12px 0 0; color: #8191aa; font-size: 14px; }
.footer-links { display: grid; gap: 8px; }
.footer-links a { color: #91a1b9; font-size: 14px; }
.footer-links a:hover { color: var(--blue); }
.copyright { display: flex; justify-content: space-between; gap: 18px; margin-top: 32px; padding-top: 22px; border-top: 1px solid rgba(101,186,255,.1); color: #65758d; font-size: 13px; }

@media (max-width: 900px) {
  .menu { display: none; }
  .mobile-menu { display: inline-flex; }
  .hero-grid, .article-layout { grid-template-columns: 1fr; }
  .hero { padding-top: 42px; }
  .hero-panel { min-height: 260px; }
  .toc { position: static; display: none; }
  .cards { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .catalog-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .detail-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
  .footer-grid > :last-child { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
  .container { width: min(100% - 24px, var(--max)); }
  .nav { width: min(100% - 24px, var(--max)); }
  .brand-title { font-size: 18px; }
  .brand-sub { display: none; }
  .nav-actions .btn-primary { display: none; }
  h1 { font-size: 42px; }
  .lead { font-size: 16px; }
  .hero-grid { gap: 30px; }
  .cards, .cards.two, .contact-grid, .footer-grid { grid-template-columns: 1fr; }
  .catalog-grid, .spec-grid { grid-template-columns: 1fr; }
  .footer-grid > :last-child { grid-column: auto; }
  .section { padding-bottom: 62px; }
  .article { padding: 26px 20px; }
  .copyright { flex-direction: column; }
}