/* ==========================================================================
   MUSTTBY — 工业科技风设计系统
   ========================================================================== */

:root {
  --ink: #07090B;
  --surface: #0E1216;
  --surface-2: #131920;
  --surface-3: #1A222B;
  --line: rgba(255, 255, 255, .09);
  --line-strong: rgba(255, 255, 255, .16);
  --text: #EDF0F3;
  --muted: #98A2AE;
  --dim: #6B7683;
  --red: #E2001A;
  --red-2: #FF2A3D;
  --red-dim: rgba(226, 0, 26, .14);
  --tile: #F4F5F7;
  --radius: 14px;
  --radius-sm: 8px;
  --container: 1240px;
  --header-h: 74px;
  --ease: cubic-bezier(.22, .61, .36, 1);
  --font: "Inter", "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: "SFMono-Regular", "JetBrains Mono", Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}

body {
  margin: 0;
  background: var(--ink);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; }
::selection { background: var(--red); color: #fff; }

.wrap { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
@media (max-width: 640px) { .wrap { padding: 0 18px; } }

/* ---------- 排版 ---------- */
h1, h2, h3, h4 { margin: 0; font-weight: 800; letter-spacing: -.028em; line-height: 1.06; }
h1 { font-size: clamp(2.5rem, 5.6vw, 4.5rem); }
h2 { font-size: clamp(1.9rem, 3.6vw, 3rem); }
h3 { font-size: clamp(1.15rem, 1.8vw, 1.4rem); letter-spacing: -.015em; line-height: 1.2; }
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--mono); font-size: 11.5px; font-weight: 600;
  letter-spacing: .2em; text-transform: uppercase; color: var(--red-2);
  margin-bottom: 18px;
}
.eyebrow::before { content: ""; width: 26px; height: 1px; background: var(--red); }
.eyebrow.no-line::before { display: none; }

.lede { font-size: clamp(1rem, 1.35vw, 1.15rem); color: var(--muted); max-width: 62ch; }
.mono { font-family: var(--mono); font-size: 12px; letter-spacing: .12em; text-transform: uppercase; color: var(--dim); }

.section { padding: clamp(64px, 9vw, 118px) 0; position: relative; }
.section--tight { padding: clamp(44px, 6vw, 76px) 0; }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 32px; margin-bottom: clamp(32px, 5vw, 56px); }
.section-head__text { max-width: 720px; }
.section-head h2 { margin-bottom: 14px; }
.hr { height: 1px; background: var(--line); border: 0; margin: 0; }

/* ---------- 按钮 ---------- */
.btn {
  --bg: var(--red); --fg: #fff;
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  height: 50px; padding: 0 26px; border: 1px solid transparent; border-radius: 999px;
  background: var(--bg); color: var(--fg); font-size: 14.5px; font-weight: 700;
  letter-spacing: .01em; cursor: pointer; transition: transform .25s var(--ease), background .2s, border-color .2s, color .2s;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); background: var(--red-2); }
.btn:active { transform: translateY(0); }
.btn svg { width: 16px; height: 16px; }
.btn--ghost { background: transparent; border-color: var(--line-strong); color: var(--text); }
.btn--ghost:hover { background: rgba(255, 255, 255, .06); border-color: rgba(255, 255, 255, .3); }
.btn--sm { height: 42px; padding: 0 18px; font-size: 13px; }
.btn--lg { height: 56px; padding: 0 32px; font-size: 15px; }

.link-arrow { display: inline-flex; align-items: center; gap: 8px; font-weight: 700; font-size: 14px; color: var(--text); }
.link-arrow svg { width: 15px; height: 15px; transition: transform .25s var(--ease); }
.link-arrow:hover { color: var(--red-2); }
.link-arrow:hover svg { transform: translateX(4px); }

/* ---------- 顶部通知条 ---------- */
.topbar {
  background: #060708; border-bottom: 1px solid var(--line);
  font-size: 12.5px; color: var(--muted);
}
.topbar .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 38px; }
.topbar a:hover { color: #fff; }
.topbar__list { display: flex; gap: 22px; align-items: center; }
.topbar__item { display: inline-flex; align-items: center; gap: 7px; }
.topbar__item svg { width: 13px; height: 13px; color: var(--red-2); }
@media (max-width: 900px) { .topbar { display: none; } }

/* ---------- 导航 ---------- */
.header {
  position: sticky; top: 0; z-index: 90;
  background: rgba(7, 9, 11, .82);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--line);
  transition: background .3s;
}
.header__inner { display: flex; align-items: center; gap: 28px; height: var(--header-h); }
.logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo img { height: 30px; width: auto; }
.logo__fallback { font-weight: 900; font-size: 21px; letter-spacing: -.02em; }
.logo__fallback span { color: var(--red); }

.nav { display: flex; align-items: center; gap: 4px; margin-left: 8px; }
.nav__link {
  position: relative; display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 14px; border-radius: 8px; font-size: 14px; font-weight: 600; color: var(--muted);
  transition: color .2s, background .2s;
}
.nav__link:hover, .nav__link.is-active { color: #fff; background: rgba(255, 255, 255, .05); }
.nav__link svg { width: 11px; height: 11px; opacity: .6; transition: transform .2s; }
.nav__item:hover > .nav__link svg { transform: rotate(180deg); }

.nav__item { position: relative; }
.mega {
  position: absolute; top: calc(100% + 10px); left: -18px;
  width: min(760px, 78vw); padding: 22px;
  background: var(--surface-2); border: 1px solid var(--line-strong); border-radius: 16px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, .55);
  display: grid; grid-template-columns: 1fr 1fr; gap: 6px 24px;
  opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: opacity .2s var(--ease), transform .2s var(--ease), visibility .2s;
}
.nav__item:hover .mega, .nav__item:focus-within .mega { opacity: 1; visibility: visible; transform: translateY(0); }
.mega a { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 11px 12px; border-radius: 9px; font-size: 14px; color: var(--muted); }
.mega a:hover { background: rgba(255, 255, 255, .05); color: #fff; }
.mega a span { font-family: var(--mono); font-size: 11px; color: var(--dim); }
.mega__foot { grid-column: 1 / -1; margin-top: 8px; padding-top: 14px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; align-items: center; }

.header__actions { display: flex; align-items: center; gap: 12px; margin-left: auto; }
.header__phone { font-size: 13.5px; color: var(--muted); font-weight: 600; }
.header__phone:hover { color: #fff; }
.burger { display: none; width: 42px; height: 42px; align-items: center; justify-content: center; background: none; border: 1px solid var(--line-strong); border-radius: 10px; cursor: pointer; }
.burger span { display: block; width: 16px; height: 1.5px; background: #fff; position: relative; }
.burger span::before, .burger span::after { content: ""; position: absolute; left: 0; width: 16px; height: 1.5px; background: #fff; }
.burger span::before { top: -5px; } .burger span::after { top: 5px; }

@media (max-width: 1080px) {
  .nav, .header__phone { display: none; }
  .burger { display: inline-flex; }
}

/* 移动端抽屉 */
.drawer {
  position: fixed; inset: 0; z-index: 120; background: var(--ink);
  transform: translateX(100%); transition: transform .35s var(--ease);
  display: flex; flex-direction: column; overflow-y: auto;
}
.drawer.is-open { transform: translateX(0); }
.drawer__head { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); padding: 0 20px; border-bottom: 1px solid var(--line); }
.drawer__close { width: 42px; height: 42px; border: 1px solid var(--line-strong); border-radius: 10px; background: none; cursor: pointer; font-size: 18px; }
.drawer nav { padding: 12px 20px 40px; }
.drawer nav a { display: block; padding: 15px 0; border-bottom: 1px solid var(--line); font-size: 18px; font-weight: 700; }
.drawer nav .drawer__sub { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; padding: 6px 0 16px; }
.drawer nav .drawer__sub a { font-size: 14px; font-weight: 500; color: var(--muted); border: 0; padding: 7px 0; }
.drawer__cta { margin: 26px 20px 40px; }

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; padding: clamp(48px, 7vw, 86px) 0 clamp(56px, 8vw, 96px); }
.hero::before {
  content: ""; position: absolute; inset: -10% -10% auto -10%; height: 78%;
  background:
    radial-gradient(58% 62% at 74% 26%, rgba(226, 0, 26, .20), transparent 70%),
    radial-gradient(42% 52% at 12% 8%, rgba(60, 96, 140, .16), transparent 72%);
  pointer-events: none;
}
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 92px 92px;
  mask-image: radial-gradient(80% 60% at 50% 20%, #000 20%, transparent 78%);
  -webkit-mask-image: radial-gradient(80% 60% at 50% 20%, #000 20%, transparent 78%);
  opacity: .5;
}
.hero .wrap { position: relative; z-index: 2; }
.hero__grid { display: grid; grid-template-columns: 1.08fr .92fr; gap: clamp(32px, 5vw, 72px); align-items: center; }
.hero h1 { margin-bottom: 22px; }
.hero h1 em { font-style: normal; color: var(--red-2); }
.hero__sub { font-size: clamp(1rem, 1.4vw, 1.16rem); color: var(--muted); max-width: 54ch; margin-bottom: 30px; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 40px; }
.hero__stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; max-width: 560px; }
.hero__stat { background: rgba(10, 13, 16, .6); padding: 16px 18px; }
.hero__stat b { display: block; font-size: clamp(1.4rem, 2.2vw, 1.9rem); font-weight: 800; letter-spacing: -.02em; }
.hero__stat span { font-size: 12px; color: var(--muted); }

.hero__visual { position: relative; }
.hero__frame { position: relative; border: 1px solid var(--line-strong); border-radius: 20px; overflow: hidden; background: #0B0F13; aspect-ratio: 4 / 3.15; }
.hero__frame img { width: 100%; height: 100%; object-fit: cover; opacity: .92; }
.hero__frame::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 40%, rgba(7, 9, 11, .78)); }
.hero__badge {
  position: absolute; left: 18px; bottom: 18px; z-index: 2;
  display: flex; align-items: center; gap: 10px; padding: 10px 14px;
  background: rgba(7, 9, 11, .72); border: 1px solid var(--line-strong); border-radius: 999px;
  backdrop-filter: blur(8px); font-size: 12.5px; font-weight: 600;
}
.hero__badge i { width: 7px; height: 7px; border-radius: 50%; background: #35D07F; box-shadow: 0 0 0 4px rgba(53, 208, 127, .18); }
.hero__tag {
  position: absolute; right: -14px; top: 24px; z-index: 2;
  padding: 10px 16px; border-radius: 999px; background: var(--red); color: #fff;
  font-family: var(--mono); font-size: 11px; letter-spacing: .14em; text-transform: uppercase;
  box-shadow: 0 14px 34px rgba(226, 0, 26, .35);
}
@media (max-width: 980px) {
  .hero__grid { grid-template-columns: 1fr; }
  .hero__visual { order: -1; }
  .hero__frame { aspect-ratio: 16 / 10; }
  .hero__tag { right: 12px; top: -12px; }
}

/* ---------- 信任条 ---------- */
.trustbar { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: #090C0F; }
.trustbar .wrap { display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 68px; flex-wrap: wrap; padding-top: 14px; padding-bottom: 14px; }
.trustbar__item { display: inline-flex; align-items: center; gap: 10px; font-size: 13px; color: var(--muted); font-weight: 600; }
.trustbar__item svg { width: 16px; height: 16px; color: var(--red-2); }

/* ---------- 分类卡 ---------- */
.cats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.cat {
  position: relative; display: block; overflow: hidden; border-radius: var(--radius);
  border: 1px solid var(--line); background: var(--surface); aspect-ratio: 1 / 1.06;
  transition: border-color .3s, transform .3s var(--ease);
}
.cat img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .6s var(--ease); opacity: .85; }
.cat__shade { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(7, 9, 11, .05) 30%, rgba(7, 9, 11, .92)); }
.cat__body { position: absolute; left: 0; right: 0; bottom: 0; padding: 18px; display: flex; align-items: flex-end; justify-content: space-between; gap: 10px; }
.cat__body h3 { font-size: 15px; letter-spacing: 0; }
.cat__body span { font-family: var(--mono); font-size: 11px; color: var(--muted); }
.cat:hover { border-color: rgba(226, 0, 26, .5); transform: translateY(-3px); }
.cat:hover img { transform: scale(1.06); }
.cat__arrow { width: 30px; height: 30px; border-radius: 50%; border: 1px solid var(--line-strong); display: grid; place-items: center; flex: 0 0 auto; }
.cat__arrow svg { width: 13px; height: 13px; }
@media (max-width: 980px) { .cats { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .cats { grid-template-columns: 1fr 1fr; gap: 10px; } .cat__body { padding: 12px; } .cat__body h3 { font-size: 13px; } }

/* ---------- 产品卡 ---------- */
.grid-products { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
@media (max-width: 1180px) { .grid-products { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 860px) { .grid-products { grid-template-columns: repeat(2, 1fr); gap: 12px; } }

.pcard {
  position: relative; display: flex; flex-direction: column; overflow: hidden;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  transition: border-color .3s, transform .3s var(--ease);
}
.pcard:hover { border-color: rgba(226, 0, 26, .45); transform: translateY(-3px); }
.pcard__media { position: relative; aspect-ratio: 1 / 1; background: var(--tile); overflow: hidden; }
.pcard__media img { width: 100%; height: 100%; object-fit: contain; padding: 8%; transition: transform .5s var(--ease); }
.pcard:hover .pcard__media img { transform: scale(1.05); }
.pcard__tag {
  position: absolute; left: 10px; top: 10px; z-index: 2;
  background: rgba(7, 9, 11, .86); color: #fff; border: 1px solid var(--line-strong);
  padding: 4px 9px; border-radius: 999px; font-family: var(--mono); font-size: 9.5px;
  letter-spacing: .1em; text-transform: uppercase;
}
.pcard__body { padding: 14px 15px 16px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.pcard__cat { font-family: var(--mono); font-size: 10px; letter-spacing: .12em; text-transform: uppercase; color: var(--red-2); }
.pcard__title { font-size: 14px; font-weight: 700; line-height: 1.34; letter-spacing: -.01em; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; min-height: 2.7em; }
.pcard__foot { margin-top: auto; display: flex; align-items: center; justify-content: space-between; gap: 8px; padding-top: 6px; }
.pcard__price { font-size: 15px; font-weight: 800; }
.pcard__price small { font-size: 11px; color: var(--dim); font-weight: 500; margin-right: 3px; }
.pcard__more { width: 30px; height: 30px; border-radius: 50%; border: 1px solid var(--line-strong); display: grid; place-items: center; transition: background .2s, border-color .2s; }
.pcard__more svg { width: 13px; height: 13px; }
.pcard:hover .pcard__more { background: var(--red); border-color: var(--red); }

/* ---------- 产品筛选 ---------- */
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 26px; }
.chip {
  display: inline-flex; align-items: center; gap: 7px; height: 38px; padding: 0 15px;
  border: 1px solid var(--line-strong); border-radius: 999px; background: transparent;
  color: var(--muted); font-size: 13px; font-weight: 600; cursor: pointer; transition: all .2s;
}
.chip:hover { color: #fff; border-color: rgba(255, 255, 255, .3); }
.chip.is-active { background: var(--red); border-color: var(--red); color: #fff; }
.chip b { font-family: var(--mono); font-size: 10.5px; opacity: .7; font-weight: 600; }
.searchbox { position: relative; flex: 1; min-width: 220px; max-width: 320px; }
.searchbox input {
  width: 100%; height: 38px; padding: 0 14px 0 38px; border-radius: 999px;
  border: 1px solid var(--line-strong); background: rgba(255, 255, 255, .03); color: var(--text); font-size: 13px;
}
.searchbox input::placeholder { color: var(--dim); }
.searchbox input:focus { outline: none; border-color: rgba(226, 0, 26, .6); background: rgba(255, 255, 255, .05); }
.searchbox svg { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); width: 14px; height: 14px; color: var(--dim); }
.filterbar { display: flex; align-items: center; justify-content: space-between; gap: 18px; flex-wrap: wrap; }
.result-count { font-family: var(--mono); font-size: 11.5px; color: var(--dim); letter-spacing: .1em; text-transform: uppercase; }
.empty { padding: 70px 0; text-align: center; color: var(--muted); }

/* ---------- 内容版式 ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 5vw, 72px); align-items: center; }
.split--wide { grid-template-columns: 1.15fr .85fr; }
@media (max-width: 900px) { .split, .split--wide { grid-template-columns: 1fr; } }
.media-box { position: relative; border-radius: 18px; overflow: hidden; border: 1px solid var(--line-strong); background: var(--surface-2); }
.media-box img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 4 / 3; }
.media-box--tall img { aspect-ratio: 4 / 4.4; }

.feature-list { display: grid; gap: 2px; margin: 26px 0 0; }
.feature { display: grid; grid-template-columns: 40px 1fr; gap: 14px; padding: 18px 0; border-top: 1px solid var(--line); }
.feature:last-child { border-bottom: 1px solid var(--line); }
.feature__num { font-family: var(--mono); font-size: 11px; color: var(--red-2); letter-spacing: .1em; padding-top: 4px; }
.feature h4 { font-size: 15px; margin-bottom: 4px; letter-spacing: -.01em; }
.feature p { font-size: 13.5px; color: var(--muted); margin: 0; }

.stat-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.stat { background: var(--surface); padding: 26px 22px; }
.stat b { display: block; font-size: clamp(1.8rem, 2.6vw, 2.6rem); font-weight: 800; letter-spacing: -.03em; line-height: 1; margin-bottom: 8px; }
.stat b i { font-style: normal; color: var(--red-2); }
.stat span { font-size: 12.5px; color: var(--muted); }
@media (max-width: 760px) { .stat-row { grid-template-columns: 1fr 1fr; } }

/* ---------- CTA 区块 ---------- */
.cta {
  position: relative; overflow: hidden; border-radius: 22px; border: 1px solid var(--line-strong);
  background: linear-gradient(120deg, #14181D 0%, #0B0E11 60%);
  padding: clamp(36px, 5.4vw, 68px);
}
.cta::before {
  content: ""; position: absolute; right: -10%; top: -60%; width: 70%; height: 220%;
  background: radial-gradient(closest-side, rgba(226, 0, 26, .28), transparent);
  pointer-events: none;
}
.cta__grid { position: relative; display: grid; grid-template-columns: 1.2fr .8fr; gap: 32px; align-items: center; }
.cta h2 { font-size: clamp(1.8rem, 3vw, 2.6rem); margin-bottom: 14px; }
.cta p { color: var(--muted); max-width: 52ch; }
.cta__actions { display: flex; flex-direction: column; gap: 12px; align-items: flex-start; }
@media (max-width: 860px) { .cta__grid { grid-template-columns: 1fr; } }

/* ---------- 页脚 ---------- */
.footer { border-top: 1px solid var(--line); background: #060809; padding: 64px 0 0; }
.footer__grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 48px; }
.footer h4 { font-size: 11.5px; font-family: var(--mono); letter-spacing: .16em; text-transform: uppercase; color: var(--dim); margin-bottom: 16px; font-weight: 600; }
.footer a { color: var(--muted); font-size: 13.5px; }
.footer a:hover { color: #fff; }
.footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 9px; }
.footer__brand p { color: var(--muted); font-size: 13.5px; max-width: 34ch; margin: 16px 0 20px; }
.footer__social { display: flex; gap: 8px; }
.footer__social a { width: 36px; height: 36px; border: 1px solid var(--line-strong); border-radius: 9px; display: grid; place-items: center; }
.footer__social a:hover { background: var(--red); border-color: var(--red); color: #fff; }
.footer__social svg { width: 15px; height: 15px; }
.footer__bottom { border-top: 1px solid var(--line); padding: 20px 0; display: flex; align-items: center; justify-content: space-between; gap: 18px; flex-wrap: wrap; }
.footer__bottom p, .footer__bottom span { margin: 0; font-size: 12.5px; color: var(--dim); }
.footer__bottom nav { display: flex; gap: 20px; }
@media (max-width: 900px) { .footer__grid { grid-template-columns: 1fr 1fr; gap: 32px; } }
@media (max-width: 560px) { .footer__grid { grid-template-columns: 1fr; } }

/* ---------- 页面头（内页） ---------- */
.pagehead { position: relative; padding: clamp(46px, 6vw, 76px) 0 clamp(36px, 4vw, 52px); border-bottom: 1px solid var(--line); overflow: hidden; }
.pagehead::before {
  content: ""; position: absolute; inset: -40% 30% auto -10%; height: 160%;
  background: radial-gradient(closest-side, rgba(226, 0, 26, .16), transparent);
  pointer-events: none;
}
.pagehead .wrap { position: relative; }
.crumb { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--dim); margin-bottom: 18px; flex-wrap: wrap; }
.crumb a:hover { color: #fff; }
.crumb span { opacity: .5; }
.pagehead h1 { font-size: clamp(2.1rem, 4.2vw, 3.4rem); }
.pagehead p { color: var(--muted); max-width: 62ch; margin-top: 16px; }

/* ---------- 产品详情 ---------- */
.pdp { display: grid; grid-template-columns: 1.02fr .98fr; gap: clamp(28px, 4.4vw, 60px); align-items: start; }
@media (max-width: 900px) { .pdp { grid-template-columns: 1fr; } }
.pdp__gallery { position: sticky; top: calc(var(--header-h) + 24px); }
.pdp__main { border-radius: 18px; overflow: hidden; border: 1px solid var(--line); background: var(--tile); aspect-ratio: 1 / 1; display: grid; place-items: center; }
.pdp__main img { width: 100%; height: 100%; object-fit: contain; padding: 6%; }
.pdp__thumbs { display: flex; gap: 10px; margin-top: 10px; }
.pdp__thumbs button { width: 72px; height: 72px; border-radius: 10px; border: 1px solid var(--line); background: var(--tile); padding: 6px; cursor: pointer; overflow: hidden; }
.pdp__thumbs button.is-active { border-color: var(--red); }
.pdp__thumbs img { width: 100%; height: 100%; object-fit: contain; }
@media (max-width: 900px) { .pdp__gallery { position: static; } }

.pdp__meta { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 14px; }
.pill { display: inline-flex; align-items: center; gap: 6px; padding: 5px 11px; border-radius: 999px; border: 1px solid var(--line-strong); font-family: var(--mono); font-size: 10.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.pill--red { border-color: rgba(226, 0, 26, .5); color: var(--red-2); background: var(--red-dim); }
.pdp h1 { font-size: clamp(1.75rem, 3.2vw, 2.6rem); margin-bottom: 16px; }
.pdp__blurb { color: var(--muted); font-size: 15.5px; }
.pdp__price { display: flex; align-items: baseline; gap: 10px; margin: 22px 0 6px; }
.pdp__price b { font-size: 30px; font-weight: 800; letter-spacing: -.02em; }
.pdp__price small { color: var(--dim); font-size: 12.5px; }
.pdp__actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 22px 0 26px; }
.pdp__points { display: grid; gap: 10px; padding: 18px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
.pdp__points li { list-style: none; display: flex; gap: 10px; align-items: flex-start; font-size: 13.5px; color: var(--muted); }
.pdp__points svg { width: 15px; height: 15px; color: #35D07F; flex: 0 0 auto; margin-top: 3px; }
.pdp__points ul { margin: 0; padding: 0; display: grid; gap: 10px; }

.specs { width: 100%; border-collapse: collapse; margin-top: 10px; }
.specs th, .specs td { text-align: left; padding: 13px 0; border-bottom: 1px solid var(--line); font-size: 13.5px; vertical-align: top; }
.specs th { width: 38%; color: var(--dim); font-weight: 600; }
.specs td { color: var(--text); }

/* ---------- 表单 ---------- */
.form { display: grid; gap: 14px; }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 620px) { .form__row { grid-template-columns: 1fr; } }
.field { display: grid; gap: 7px; }
.field label { font-size: 12px; font-weight: 600; color: var(--muted); }
.field label i { color: var(--red-2); font-style: normal; }
.field input, .field select, .field textarea {
  width: 100%; height: 46px; padding: 0 14px; border-radius: 10px;
  border: 1px solid var(--line-strong); background: rgba(255, 255, 255, .03); color: var(--text);
  font-family: inherit; font-size: 14px; transition: border-color .2s, background .2s;
}
.field textarea { height: 120px; padding: 12px 14px; resize: vertical; }
.field select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2398A2AE' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 14px center; padding-right: 36px; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: rgba(226, 0, 26, .65); background: rgba(255, 255, 255, .05); }
.field input::placeholder, .field textarea::placeholder { color: var(--dim); }
.form__note { font-size: 12px; color: var(--dim); }
.form__status { font-size: 13.5px; padding: 12px 14px; border-radius: 10px; display: none; }
.form__status.is-ok { display: block; background: rgba(53, 208, 127, .12); border: 1px solid rgba(53, 208, 127, .3); color: #7CE0AE; }
.form__status.is-err { display: block; background: var(--red-dim); border: 1px solid rgba(226, 0, 26, .4); color: #FF8C97; }

.contact-grid { display: grid; grid-template-columns: 1fr 1.15fr; gap: clamp(30px, 5vw, 64px); align-items: start; }
@media (max-width: 900px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-list { display: grid; gap: 2px; margin-top: 26px; }
.contact-item { display: grid; grid-template-columns: 42px 1fr; gap: 14px; align-items: start; padding: 16px 0; border-top: 1px solid var(--line); }
.contact-item:last-child { border-bottom: 1px solid var(--line); }
.contact-item__icon { width: 42px; height: 42px; border-radius: 11px; border: 1px solid var(--line-strong); display: grid; place-items: center; background: var(--surface); }
.contact-item__icon svg { width: 17px; height: 17px; color: var(--red-2); }
.contact-item h4 { font-size: 11px; font-family: var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--dim); margin-bottom: 5px; font-weight: 600; }
.contact-item p, .contact-item a { font-size: 14px; margin: 0; color: var(--text); }
.contact-item a:hover { color: var(--red-2); }
.form-card { background: var(--surface); border: 1px solid var(--line); border-radius: 18px; padding: clamp(22px, 3vw, 34px); }

/* ---------- FAQ / 列表 ---------- */
.faq { border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
  padding: 20px 0; cursor: pointer; font-size: 15.5px; font-weight: 700; list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 20px; color: var(--red-2); font-weight: 400; transition: transform .2s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq__body { padding: 0 0 22px; color: var(--muted); font-size: 14px; max-width: 88ch; }

.prose { max-width: 78ch; }
.prose h2 { font-size: 1.6rem; margin: 40px 0 14px; }
.prose h3 { font-size: 1.15rem; margin: 28px 0 10px; }
.prose p, .prose li { color: var(--muted); font-size: 15px; }
.prose ul { padding-left: 20px; display: grid; gap: 7px; }

/* ---------- 弹窗询盘 ---------- */
.modal {
  position: fixed; inset: 0; z-index: 200; display: none; place-items: center; padding: 20px;
  background: rgba(4, 5, 7, .78); backdrop-filter: blur(6px);
}
.modal.is-open { display: grid; }
.modal__panel {
  width: min(560px, 100%); max-height: 92vh; overflow-y: auto;
  background: var(--surface-2); border: 1px solid var(--line-strong); border-radius: 18px;
  padding: clamp(22px, 3vw, 34px); position: relative;
  animation: pop .28s var(--ease);
}
@keyframes pop { from { opacity: 0; transform: translateY(12px) scale(.98); } }
.modal__close { position: absolute; right: 16px; top: 16px; width: 36px; height: 36px; border-radius: 9px; border: 1px solid var(--line-strong); background: none; cursor: pointer; }
.modal h3 { font-size: 1.35rem; margin-bottom: 6px; }
.modal p.modal__sub { color: var(--muted); font-size: 13.5px; margin-bottom: 20px; }

/* ---------- 浮动 WhatsApp ---------- */
.wa {
  position: fixed; right: 20px; bottom: 20px; z-index: 80;
  display: inline-flex; align-items: center; gap: 10px; height: 52px; padding: 0 20px 0 16px;
  border-radius: 999px; background: #25D366; color: #04250F; font-weight: 800; font-size: 14px;
  box-shadow: 0 14px 34px rgba(37, 211, 102, .32); transition: transform .2s;
}
.wa:hover { transform: translateY(-2px); }
.wa svg { width: 20px; height: 20px; }
@media (max-width: 640px) { .wa { right: 14px; bottom: 14px; height: 48px; padding: 0 16px; font-size: 13px; } }

/* ---------- 其他 ---------- */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link { position: absolute; left: 12px; top: -60px; z-index: 300; background: var(--red); color: #fff; padding: 10px 16px; border-radius: 8px; transition: top .2s; }
.skip-link:focus { top: 12px; }
/* 仅在 JS 可用时才隐藏待入场元素，避免禁用 JS 时整页空白 */
.js .reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
.js .reveal.is-in { opacity: 1; transform: none; }

.marquee { overflow: hidden; border-block: 1px solid var(--line); background: #080B0E; }
.marquee__track {
  display: block; white-space: nowrap; width: max-content;
  padding: 15px 0; animation: marquee 44s linear infinite;
}
.marquee:hover .marquee__track { animation-play-state: paused; }
.marquee span {
  display: inline-block; font-family: var(--mono); font-size: 11.5px;
  letter-spacing: .18em; text-transform: uppercase; color: var(--dim);
  margin-right: 46px;
}
.marquee span::after { content: "◆"; color: var(--red); font-size: 8px; margin-left: 46px; vertical-align: middle; }
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }

.badge-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
@media (max-width: 760px) { .badge-grid { grid-template-columns: 1fr; } }
.badge-card { border: 1px solid var(--line); border-radius: 12px; padding: 20px; background: var(--surface); }
.badge-card b { display: block; font-size: 14px; margin-bottom: 6px; }
.badge-card p { font-size: 13px; color: var(--muted); margin: 0; }
.badge-card svg { width: 20px; height: 20px; color: var(--red-2); margin-bottom: 12px; }

/* ---------- 图标辅助 ---------- */
.ico { display: inline-flex; align-items: center; justify-content: center; width: 1em; height: 1em; flex: 0 0 auto; }
.ico svg { width: 100%; height: 100%; display: block; }
.btn .ico { width: 16px; height: 16px; }
.trustbar__item .ico, .topbar__item .ico { width: 15px; height: 15px; }
.footer__social .ico { width: 15px; height: 15px; }
.contact-item__icon .ico { width: 17px; height: 17px; color: var(--red-2); }
.badge-card .ico { width: 20px; height: 20px; color: var(--red-2); margin-bottom: 12px; }
.feature .ico { color: #35D07F; }
.cat__body h3 { margin: 0 0 3px; }
a.badge-card { transition: border-color .25s, transform .25s var(--ease); }
a.badge-card:hover { border-color: rgba(226, 0, 26, .45); transform: translateY(-2px); }

/* ---------- 头部滚动状态 ---------- */
.header.is-scrolled { background: rgba(7, 9, 11, .95); box-shadow: 0 10px 30px rgba(0, 0, 0, .35); }

/* ---------- 首页 Hero 图片占位高度 ---------- */
.hero__frame img { min-height: 100%; }

/* ---------- 内页 CTA 里的按钮组 ---------- */
.cta__actions .btn { width: 100%; justify-content: center; }
@media (min-width: 861px) { .cta__actions .btn { width: 100%; } }
/* 分类卡：白底产品图（方形，contain，不裁切） */
.cat .cat__img--tile {
  object-fit: contain; padding: 13%; background: var(--tile); opacity: 1;
}
.cat:hover .cat__img--tile { transform: scale(1.04); }
/* ---------- 移动端：区块标题堆叠，避免右侧链接挤到正文 ---------- */
@media (max-width: 760px) {
  .section-head { flex-direction: column; align-items: flex-start; gap: 16px; }
  .section-head .link-arrow { font-size: 13px; }
  .filterbar { flex-direction: column; align-items: stretch; }
  .searchbox { max-width: none; }
  .stat { padding: 18px 16px; }
  .pdp__gallery { position: static; }
  .cta { border-radius: 16px; }
  .cta h2 { font-size: 1.7rem; }
}
@media (max-width: 560px) {
  .header__inner { gap: 12px; }
  .logo img { height: 24px; }
  .hero { padding-top: 34px; }
  .hero__cta .btn { width: 100%; }
  .hero__stats { grid-template-columns: 1fr 1fr; }
  .hero__stats > div:nth-child(3) { grid-column: span 2; }
  .badge-grid { grid-template-columns: 1fr; }
}
/* 工厂照裁切：避开旧 logo 水印，聚焦产线 */
.hero__frame img { object-position: 50% 68%; }
.media-box img { object-position: 50% 60%; }
/* 工厂照顶部加暗角，压掉旧 logo 水印 */
.hero__frame::before {
  content: ""; position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background: linear-gradient(180deg, rgba(7,9,11,.72) 0%, rgba(7,9,11,.18) 26%, transparent 46%);
}
.media-box::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(180deg, rgba(7,9,11,.55) 0%, transparent 30%);
}