/* ==========================================================================
   Site stylesheet — corporate / acoustic components
   Design language: precision instrument. Hairlines, small radii, warm paper.
   No external dependencies (fonts, icons, libraries are all local or system).
   ========================================================================== */

/* --------------------------------------------------------------- 1. tokens */
:root {
  /* colour ------------------------------------------------------------- */
  --brand:          #3969B2;   /* 品牌蓝，取自官方 Logo */
  --brand-2:        #2C5591;
  --brand-wash:     #EDF2FA;
  --navy:           #0E2440;   /* 深海军蓝，取自展会设计 */
  --ink:            #14181C;
  --ink-2:          #4A5560;
  --ink-3:          #76828D;
  --paper:          #F7F8FA;
  --paper-2:        #FFFFFF;
  --line:           #E3E6EA;
  --line-strong:    #C9CED4;
  --signal:         #3969B2;
  --signal-2:       #2C5591;
  --signal-wash:    #EDF2FA;
  --accent:         #C9A96E;
  --ok:             #0B6B62;
  --err:            #B3261E;

  /* type --------------------------------------------------------------- */
  --font-display: "SF Pro Display", -apple-system, BlinkMacSystemFont,
                  "Segoe UI Semibold", "PingFang SC", "HarmonyOS Sans SC",
                  "Microsoft YaHei", sans-serif;
  --font-body:    -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                  "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono:    ui-monospace, "SF Mono", "Cascadia Mono", "Roboto Mono",
                  Consolas, "Liberation Mono", monospace;

  --fs-display:  clamp(2.5rem, 6vw, 4.5rem);
  --fs-h2:       clamp(1.7rem, 3.1vw, 2.55rem);
  --fs-h3:       clamp(1.1rem, 1.5vw, 1.35rem);
  --fs-body:     clamp(1rem, 0.4vw + 0.9rem, 1.0625rem);
  --fs-small:    0.875rem;
  --fs-eyebrow:  0.75rem;

  /* space -------------------------------------------------------------- */
  --pad-y:    clamp(64px, 9vw, 128px);
  --pad-x:    clamp(20px, 5vw, 48px);
  --maxw:     1200px;
  --gap:      clamp(20px, 3vw, 40px);

  /* shape / motion ------------------------------------------------------ */
  --r-sm: 2px;
  --r-md: 4px;
  --r-lg: 8px;
  --ease: cubic-bezier(.2, .7, .2, 1);
  --t-fast: 160ms;
  --t-mid:  280ms;
  --t-slow: 480ms;
}

/* ---------------------------------------------------------------- 2. reset */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-wrap: break-word;
}
img, svg { max-width: 100%; display: block; }
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 650; line-height: 1.12; margin: 0; letter-spacing: -0.018em; text-wrap: pretty; }
p { margin: 0; text-wrap: pretty; }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }
button, input, select, textarea { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; border-radius: var(--r-sm); }

/* ------------------------------------------------------------ 3. primitives */
.wrap    { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--pad-x); }
.section { padding-block: var(--pad-y); }
.section--tight { padding-block: clamp(40px, 6vw, 80px); }
.section--line  { border-top: 1px solid var(--line); }
.section--ink   { background: var(--navy); color: var(--paper); }
.section--wash  { background: var(--signal-wash); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-eyebrow);
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--signal);
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 18px;
}
.eyebrow::before { content: ""; width: 26px; height: 1px; background: currentColor; }
.section--ink .eyebrow { color: var(--signal-2); }

.lede { font-size: clamp(1.05rem, 1.4vw, 1.2rem); color: var(--ink-2); max-width: 62ch; }
.section--ink .lede { color: #B9C4CA; }

.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

/* buttons ---------------------------------------------------------------- */
.btn {
  --btn-bg: var(--signal);
  --btn-fg: var(--paper-2);
  --btn-bd: var(--signal);
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 14px 26px;
  background: var(--btn-bg); color: var(--btn-fg);
  border: 1px solid var(--btn-bd); border-radius: var(--r-sm);
  font-size: var(--fs-small); font-weight: 600; letter-spacing: .04em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}
.btn:hover  { --btn-bg: var(--signal-2); --btn-bd: var(--signal-2); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .55; cursor: not-allowed; transform: none; }
.btn--ghost { --btn-bg: transparent; --btn-fg: var(--ink); --btn-bd: var(--line-strong); }
.btn--ghost:hover { --btn-bg: var(--ink); --btn-fg: var(--paper); --btn-bd: var(--ink); }
.section--ink .btn--ghost { --btn-fg: var(--paper); --btn-bd: #4A5A63; }
.section--ink .btn--ghost:hover { --btn-bg: var(--paper); --btn-fg: var(--ink); --btn-bd: var(--paper); }

.link-arrow { display: inline-flex; align-items: center; gap: 8px; font-size: var(--fs-small);
  font-weight: 600; letter-spacing: .04em; text-transform: uppercase; color: var(--signal); }
.link-arrow span { transition: transform var(--t-fast) var(--ease); }
.link-arrow:hover span { transform: translateX(4px); }

/* ------------------------------------------------------------- 4. header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: saturate(150%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; gap: 24px; height: 72px; }

.brand { display: inline-flex; align-items: center; gap: 12px; margin-right: auto; }
.brand-logo { height: 34px; width: auto; flex: none; display: block; }

.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
  padding: 8px 14px; border-radius: var(--r-sm);
  font-size: var(--fs-small); font-weight: 500; color: var(--ink-2);
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.nav a:hover { background: color-mix(in srgb, var(--ink) 6%, transparent); color: var(--ink); }
.nav a[aria-current="page"] { color: var(--signal); font-weight: 600; }

.header-tools { display: flex; align-items: center; gap: 10px; }

.lang-toggle {
  display: inline-flex; align-items: center; gap: 2px;
  border: 1px solid var(--line-strong); border-radius: var(--r-sm);
  padding: 3px; background: var(--paper-2); cursor: pointer;
}
.lang-toggle button {
  border: 0; background: transparent; cursor: pointer;
  font-family: var(--font-mono); font-size: .6875rem; letter-spacing: .1em;
  padding: 5px 9px; border-radius: var(--r-sm); color: var(--ink-3);
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.lang-toggle button[aria-pressed="true"] { background: var(--ink); color: var(--paper); }

.nav-toggle { display: none; width: 40px; height: 36px; border: 1px solid var(--line-strong);
  background: var(--paper-2); border-radius: var(--r-sm); cursor: pointer;
  align-items: center; justify-content: center; }
.nav-toggle i { display: block; width: 16px; height: 1px; background: var(--ink); position: relative; }
.nav-toggle i::before, .nav-toggle i::after {
  content: ""; position: absolute; left: 0; width: 16px; height: 1px; background: var(--ink);
}
.nav-toggle i::before { top: -5px; } .nav-toggle i::after { top: 5px; }

/* ---------------------------------------------------------------- 5. hero */
.hero { position: relative; overflow: hidden; padding-block: clamp(56px, 10vw, 132px); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  gap: var(--gap); align-items: center; }
.hero-title { font-size: var(--fs-display); margin-bottom: 24px; }
.hero-title em { font-style: normal; color: var(--signal); }
.hero-sub { font-size: clamp(1.05rem, 1.5vw, 1.25rem); color: var(--ink-2); max-width: 52ch; margin-bottom: 36px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 44px; }
.hero-facts { display: flex; flex-wrap: wrap; gap: clamp(20px, 4vw, 48px);
  border-top: 1px solid var(--line); padding-top: 24px; }
.hero-facts div { min-width: 110px; }
.hero-facts dt { font-size: var(--fs-small); color: var(--ink-3); margin-bottom: 4px; }
.hero-facts dd { margin: 0; font-family: var(--font-display); font-size: 1.5rem; font-weight: 650; }

.hero-visual { position: relative; aspect-ratio: 4 / 3; border: 1px solid var(--line);
  border-radius: var(--r-md); background: var(--paper-2); overflow: hidden; }
.hero-visual img { width: 100%; height: 100%; object-fit: contain; }
.hero-visual .ph { position: absolute; inset: 0; display: grid; place-content: center;
  gap: 8px; text-align: center; font-family: var(--font-mono); font-size: .75rem;
  letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3); }
.hero-visual .ph strong { font-size: .875rem; letter-spacing: .18em; color: var(--ink-2); font-weight: 600; }
legend.eyebrow { display: flex; padding: 0; margin-bottom: 24px; }
.hero-wave { position: absolute; inset: auto 0 0 0; opacity: .5; }

/* ------------------------------------------------------------- 6. sections */
.head-block { max-width: 68ch; margin-bottom: clamp(32px, 5vw, 60px); }
.head-block h2 { font-size: var(--fs-h2); margin-bottom: 16px; }
.section-head { display: flex; flex-wrap: wrap; align-items: end; justify-content: space-between;
  gap: 20px; margin-bottom: clamp(32px, 5vw, 56px); }
.section-head h2 { font-size: var(--fs-h2); }

/* capability cards ------------------------------------------------------- */
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1px;
  background: var(--line); border: 1px solid var(--line); border-radius: var(--r-md); overflow: hidden; }
.card { background: var(--paper-2); padding: clamp(24px, 3vw, 36px); }
.card-idx { font-family: var(--font-mono); font-size: var(--fs-eyebrow); letter-spacing: .16em;
  color: var(--signal); margin-bottom: 18px; }
.card h3 { font-size: var(--fs-h3); margin-bottom: 10px; }
.card p { color: var(--ink-2); font-size: .9688rem; }

/* product media / cards -------------------------------------------------- */
.product { padding: clamp(22px, 3vw, 32px) 0; border-top: 1px solid var(--line);
  transition: background var(--t-fast) var(--ease); }
.product:last-child { border-bottom: 1px solid var(--line); }
.product:hover { background: color-mix(in srgb, var(--brand) 3%, transparent); }
.product-top { display: grid; grid-template-columns: 260px minmax(0, 1fr) auto;
  gap: clamp(16px, 3vw, 40px); align-items: center; }
.product-info { min-width: 0; }
.product-fig { width: 100%; aspect-ratio: 4 / 3; border: 1px solid var(--line);
  border-radius: var(--r-sm); background: var(--paper-2); overflow: hidden; }
.product-fig img { width: 100%; height: 100%; object-fit: contain; }
.product-model { font-family: var(--font-mono); font-size: 1.0625rem; font-weight: 700;
  letter-spacing: .02em; color: var(--brand); }
.product-name { margin-top: 4px; font-family: var(--font-display); font-weight: 600;
  font-size: 1.0625rem; }
.product-desc { margin-top: 8px; color: var(--ink-2); font-size: .9375rem; max-width: 60ch; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.chip { font-family: var(--font-mono); font-size: .6875rem; letter-spacing: .06em;
  padding: 3px 9px; border: 1px solid var(--line-strong); border-radius: 999px; color: var(--ink-2); }
.chip--brand { border-color: var(--brand); color: var(--brand); background: var(--brand-wash); }
.product .btn { white-space: nowrap; }

/* per-product spec list -------------------------------------------------- */
.speclist { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 1px; background: var(--line); border: 1px solid var(--line);
  border-radius: var(--r-sm); overflow: hidden; margin-top: 22px; }
.speclist > div { background: var(--paper-2); padding: 10px 14px; }
.speclist dt { font-family: var(--font-mono); font-size: .6875rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--ink-3); margin-bottom: 3px; }
.speclist dd { margin: 0; font-size: .9375rem; font-variant-numeric: tabular-nums; }

/* feature list ----------------------------------------------------------- */
.flist { display: grid; gap: 10px; }
.flist li { position: relative; padding-left: 22px; color: var(--ink-2); font-size: .9375rem; }
.flist li::before { content: ""; position: absolute; left: 0; top: .62em;
  width: 11px; height: 11px; border-radius: 2px; background: var(--brand-wash);
  border: 1px solid var(--brand); }

/* equipment chips -------------------------------------------------------- */
.equip { display: flex; flex-wrap: wrap; gap: 8px; }
.equip span { font-size: .875rem; padding: 7px 13px; background: var(--paper-2);
  border: 1px solid var(--line); border-radius: var(--r-sm); color: var(--ink-2); }

/* cert grid -------------------------------------------------------------- */
.certs { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 1px;
  background: var(--line); border: 1px solid var(--line); border-radius: var(--r-md); overflow: hidden; }
.certs div { background: var(--paper-2); padding: 22px 18px; text-align: center; }
.certs strong { display: block; font-family: var(--font-display); font-size: 1.125rem;
  letter-spacing: .02em; margin-bottom: 4px; }
.certs span { font-size: .8125rem; color: var(--ink-3); }

/* category label --------------------------------------------------------- */
.cat-label { display: flex; align-items: baseline; gap: 14px; margin-bottom: 8px; }
.cat-label h2, .cat-label h3 { font-size: var(--fs-h3); }
.cat-label span { font-family: var(--font-mono); font-size: .75rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--ink-3); }

/* spec table ------------------------------------------------------------- */
.table-scroll { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--r-md); }
table.spec { width: 100%; border-collapse: collapse; background: var(--paper-2); min-width: 640px; }
table.spec th, table.spec td { text-align: left; padding: 13px 18px; border-bottom: 1px solid var(--line);
  font-size: .9375rem; }
table.spec thead th { font-family: var(--font-mono); font-size: var(--fs-eyebrow); letter-spacing: .14em;
  text-transform: uppercase; color: var(--ink-3); font-weight: 500; background: var(--paper); }
table.spec tbody th { font-weight: 500; color: var(--ink-2); width: 30%; }
table.spec td { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
table.spec tr:last-child th, table.spec tr:last-child td { border-bottom: 0; }
.tbd { color: var(--ink-3); }

/* application tiles ------------------------------------------------------ */
.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: var(--gap); }
.tile { border: 1px solid var(--line); border-radius: var(--r-md); padding: 24px;
  background: var(--paper-2); transition: border-color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease); }
.tile:hover { border-color: var(--signal); transform: translateY(-2px); }
.tile h3 { font-size: 1.0625rem; margin-bottom: 8px; }
.tile p { color: var(--ink-2); font-size: .9375rem; }
.tile-mark { width: 28px; height: 28px; color: var(--signal); margin-bottom: 16px; }

/* timeline --------------------------------------------------------------- */
.timeline { display: grid; gap: 0; }
.tl-row { display: grid; grid-template-columns: 120px minmax(0, 1fr); gap: clamp(16px, 4vw, 48px);
  padding: 26px 0; border-top: 1px solid var(--line); }
.tl-row:last-child { border-bottom: 1px solid var(--line); }
.tl-year { font-family: var(--font-mono); font-size: 1.0625rem; color: var(--signal); font-weight: 600; }
.tl-row h3 { font-size: var(--fs-h3); margin-bottom: 6px; }
.tl-row p { color: var(--ink-2); font-size: .9375rem; max-width: 66ch; }

/* contact ---------------------------------------------------------------- */
.contact-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr);
  gap: clamp(32px, 6vw, 80px); align-items: start; }
.info-block { padding-block: 18px; border-top: 1px solid var(--line); }
.info-block:first-of-type { border-top: 0; }
.info-block dt { font-family: var(--font-mono); font-size: var(--fs-eyebrow); letter-spacing: .14em;
  text-transform: uppercase; color: var(--ink-3); margin-bottom: 6px; }
.info-block dd { margin: 0; color: var(--ink); }

.form-card { background: var(--paper-2); border: 1px solid var(--line); border-radius: var(--r-md);
  padding: clamp(24px, 3.5vw, 40px); }
.field { margin-bottom: 20px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field label { display: block; font-size: var(--fs-small); font-weight: 600; margin-bottom: 7px; }
.field label .req { color: var(--accent); margin-left: 3px; }
.field input, .field select, .field textarea {
  width: 100%; padding: 12px 14px; background: var(--paper);
  border: 1px solid var(--line-strong); border-radius: var(--r-sm);
  transition: border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease),
              box-shadow var(--t-fast) var(--ease);
}
.field input:hover, .field select:hover, .field textarea:hover { border-color: var(--ink-3); }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: 0; background: var(--paper-2); border-color: var(--signal);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--signal) 15%, transparent);
}
.field textarea { resize: vertical; min-height: 130px; }
.field input[aria-invalid="true"], .field textarea[aria-invalid="true"] { border-color: var(--err); }
.field-hint { font-size: .8125rem; color: var(--ink-3); margin-top: 6px; }

/* honeypot — must stay off-screen, must NOT be type=hidden */
.hp-field { position: absolute !important; left: -9999px !important; top: -9999px !important;
            height: 0; width: 0; overflow: hidden; }

.form-status { margin: 16px 0 0; font-size: .9375rem; min-height: 1.4em; }
.form-status:empty { margin: 0; }
.form-status.is-ok  { color: var(--ok); }
.form-status.is-err { color: var(--err); }

/* ---------------------------------------------------------------- 7. footer */
.site-footer { background: var(--navy); color: #AEBAC1; padding-block: clamp(48px, 7vw, 88px) 32px; }
.footer-grid { display: grid; grid-template-columns: minmax(0, 1.4fr) repeat(3, minmax(0, 1fr));
  gap: var(--gap); padding-bottom: 40px; border-bottom: 1px solid #26333A; }
.site-footer h4 { font-family: var(--font-mono); font-size: var(--fs-eyebrow); letter-spacing: .16em;
  text-transform: uppercase; color: #7A8B94; font-weight: 500; margin-bottom: 16px; }
.site-footer li { margin-bottom: 10px; font-size: .9375rem; }
.site-footer a:hover { color: var(--paper); }
.footer-brand .brand-logo { height: 30px; margin-bottom: 2px; }
.footer-brand p { margin-top: 14px; font-size: .9375rem; max-width: 34ch; color: #8E9DA6; }
.footer-bottom { display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between;
  padding-top: 24px; font-size: .8125rem; color: #6E7E87; }

/* ------------------------------------------------------------- 8. misc pages */
.page-head { padding-block: clamp(48px, 7vw, 96px) clamp(32px, 5vw, 56px);
  border-bottom: 1px solid var(--line); }
.page-head h1 { font-size: clamp(2rem, 4.4vw, 3.2rem); margin-bottom: 16px; }

.simple { min-height: 70vh; display: grid; place-content: center; text-align: center; gap: 20px;
  padding-block: var(--pad-y); }
.simple h1 { font-size: clamp(2rem, 4.4vw, 3rem); }
.simple p { color: var(--ink-2); max-width: 46ch; margin-inline: auto; }
.simple .err { color: var(--err); font-weight: 600; }

/* ------------------------------------------------------------- 9. reveal */
[data-reveal] { opacity: 0; transform: translateY(14px);
  transition: opacity var(--t-slow) var(--ease), transform var(--t-slow) var(--ease); }
[data-reveal].is-visible { opacity: 1; transform: none; }

/* ------------------------------------------------------- 10. responsive */
/* 断点：1200 笔记本 · 1024 小笔记本/横屏平板 · 880 平板 · 680 大屏手机 · 480 手机 */

/* 笔记本偏窄：产品行收窄缩略图 */
@media (max-width: 1200px) {
  .product-top { grid-template-columns: 210px minmax(0, 1fr) auto; }
}

/* 小笔记本 / 横屏平板：导航收进汉堡菜单 */
@media (max-width: 1024px) {
  .nav-toggle { display: inline-flex; }
  .nav {
    position: absolute; top: 72px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--paper); border-bottom: 1px solid var(--line);
    padding: 8px var(--pad-x) 16px;
    display: none;
  }
  .nav.is-open { display: flex; }
  .nav a { padding: 14px 0; border-bottom: 1px solid var(--line); }
  .nav a:last-child { border-bottom: 0; }
  .product-top { grid-template-columns: 180px minmax(0, 1fr); }
  .product-fig { width: 180px; }
  .product .btn { grid-column: 1 / -1; justify-self: start; }
}

/* 平板竖屏：通栏堆叠 */
@media (max-width: 880px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { aspect-ratio: 16 / 10; order: -1; }
  .hero-sub { margin-bottom: 28px; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .section-head { align-items: flex-start; }
  .head-block { max-width: none; }
}

/* 大屏手机：单列 + 触控目标放大 */
@media (max-width: 680px) {
  .header-inner { height: 64px; gap: 12px; }
  .nav { top: 64px; }
  .brand-logo { height: 27px; }
  .product-top { grid-template-columns: 1fr; }
  .product-fig { width: 100%; aspect-ratio: 16 / 10; }
  .product .btn { grid-column: auto; }
  .field-row { grid-template-columns: 1fr; }
  .tl-row { grid-template-columns: 1fr; gap: 8px; }
  .footer-grid { grid-template-columns: 1fr; }
  .btn { padding: 15px 22px; }
  .lang-toggle button { padding: 7px 11px; }
  .hero-facts { gap: 16px 28px; }
  .hero-facts div { min-width: 88px; }
  .speclist { grid-template-columns: 1fr; }
  .certs { grid-template-columns: repeat(2, 1fr); }
}

/* 手机：进一步压缩 */
@media (max-width: 480px) {
  :root { --pad-y: 56px; }
  .header-tools .btn { display: none; }   /* 页头 CTA 让位给导航 */
  .hero-title { letter-spacing: -0.012em; }
  .hero-actions .btn { flex: 1 1 100%; }
  .equip span { font-size: .8125rem; padding: 6px 11px; }
  .certs { grid-template-columns: 1fr; }
  .product-fig { aspect-ratio: 4 / 3; }
}

/* 超宽屏：内容不要被拉太散 */
@media (min-width: 1600px) {
  :root { --maxw: 1320px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
  [data-reveal] { opacity: 1; transform: none; }
}