/* ==========================================================================
   爱济柴 · 济柴发电机组服务中心
   设计基调：参考济柴官网的 CNPC 红 + 工业白/深灰，简洁、稳重、可信
   ========================================================================== */

:root {
  --red: #cc0001;
  --red-dark: #a30001;
  --red-soft: #fff2f1;
  --red-line: #f0c9c8;
  --gold: #f5a800;
  --gold-soft: #fff7e6;
  --ink: #16181c;
  --body: #3f4650;
  --muted: #6b7280;
  --line: #e4e7eb;
  --line-strong: #cfd4da;
  --bg: #ffffff;
  --bg-alt: #f5f6f8;
  --dark: #111418;
  --dark-2: #1a1e23;
  --radius: 6px;
  --shadow-sm: 0 2px 8px rgba(15, 20, 25, .05);
  --shadow: 0 12px 36px rgba(15, 20, 25, .10);
  --container: 1200px;
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC",
    system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
}

*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--body);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.nav-open { overflow: hidden; }

img { max-width: 100%; height: auto; }
a { color: var(--red); text-decoration: none; }
a:hover { color: var(--red-dark); }
p { margin: 0 0 1em; }
ul, ol { margin: 0 0 1em; padding-left: 1.3em; }
li { margin: .35em 0; }
h1, h2, h3, h4 {
  margin: 0 0 .5em;
  color: var(--ink);
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: -.01em;
}
h1 { font-size: clamp(2rem, 4vw, 3.2rem); }
h2 { font-size: clamp(1.55rem, 2.8vw, 2.3rem); }
h3 { font-size: 1.2rem; }
h4 { font-size: 1.05rem; }
strong { color: var(--ink); }
small { font-size: .82em; }
hr { border: 0; border-top: 1px solid var(--line); margin: 32px 0; }
::selection { background: var(--red); color: #fff; }

:focus-visible {
  outline: 3px solid rgba(204, 0, 1, .35);
  outline-offset: 2px;
}

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

.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: fixed;
  top: -60px; left: 16px;
  z-index: 2000;
  background: var(--red);
  color: #fff;
  padding: 10px 18px;
  border-radius: 0 0 4px 4px;
  transition: top .2s;
}
.skip-link:focus { top: 0; color: #fff; }

.icon {
  width: 24px;
  height: 24px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex: none;
}

/* --------------------------------------------------------------------------
   顶部信息条 / 页头
   -------------------------------------------------------------------------- */
.topbar {
  background: #0d0f12;
  color: #b9c0c9;
  font-size: 12.5px;
  line-height: 1.5;
}
.topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 36px;
}
.topbar__note {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0;
  letter-spacing: .02em;
}
.topbar__note .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 3px rgba(245, 168, 0, .16);
}
.topbar__contact {
  display: flex;
  align-items: center;
  gap: 14px;
}
.topbar__contact a { color: #d8dde4; white-space: nowrap; }
.topbar__contact a:hover { color: #fff; }
.topbar__contact .sep { width: 1px; height: 12px; background: #343a42; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
  border-bottom: 1px solid var(--line);
  transition: box-shadow .25s;
}
.site-header.is-scrolled { box-shadow: 0 6px 24px rgba(15, 20, 25, .10); }
.site-header__inner {
  position: relative;
  z-index: 95;
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 76px;
}
.brand,
.site-header__actions { position: relative; z-index: 96; }

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: none;
  color: var(--ink);
}
.brand:hover { color: var(--ink); }
.brand__mark { width: 46px; height: 46px; display: block; }
.brand__text { display: flex; flex-direction: column; line-height: 1.22; }
.brand__text strong {
  font-size: 23px;
  font-weight: 800;
  letter-spacing: .06em;
  color: var(--ink);
}
.brand__text strong span { color: var(--red); }
.brand__text small {
  margin-top: 2px;
  font-size: 11px;
  color: var(--muted);
  letter-spacing: .04em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-left: auto;
}
.nav > a {
  position: relative;
  padding: 26px 0;
  color: #30363d;
  font-size: 14.5px;
  font-weight: 600;
  white-space: nowrap;
  transition: color .2s;
}
.nav > a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 18px;
  height: 2px;
  background: var(--red);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s;
}
.nav > a:hover,
.nav > a.is-active { color: var(--red); }
.nav > a:hover::after,
.nav > a.is-active::after { transform: scaleX(1); }

.site-header__actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex: none;
}
.header-phone {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
  padding-left: 16px;
  border-left: 1px solid var(--line);
  color: var(--ink);
}
.header-phone span { font-size: 11.5px; color: var(--muted); }
.header-phone strong { font-size: 17px; font-weight: 800; color: var(--red); letter-spacing: .02em; }
.header-phone:hover strong { color: var(--red-dark); }

.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  place-items: center;
  padding: 0;
}
.nav-toggle .icon { width: 26px; height: 26px; }
.nav-toggle .i-close { display: none; }
body.nav-open .nav-toggle .i-menu { display: none; }
body.nav-open .nav-toggle .i-close { display: block; }

.nav-overlay {
  position: fixed;
  inset: 0;
  z-index: 80;
  background: rgba(8, 10, 13, .55);
  opacity: 0;
  visibility: hidden;
  transition: opacity .25s, visibility .25s;
}
body.nav-open .nav-overlay { opacity: 1; visibility: visible; }

/* --------------------------------------------------------------------------
   按钮 / 标签
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 48px;
  padding: 12px 24px;
  border: 1px solid transparent;
  border-radius: 4px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.2;
  text-align: center;
  cursor: pointer;
  transition: background .2s, color .2s, border-color .2s, transform .2s, box-shadow .2s;
}
.btn .icon { width: 18px; height: 18px; }
.btn--primary { background: var(--red); color: #fff; box-shadow: 0 8px 20px rgba(204, 0, 1, .22); }
.btn--primary:hover { background: var(--red-dark); color: #fff; transform: translateY(-1px); }
.btn--dark { background: var(--ink); color: #fff; }
.btn--dark:hover { background: #000; color: #fff; }
.btn--light { background: #fff; color: var(--ink); border-color: #fff; }
.btn--light:hover { background: #f1f2f4; color: var(--ink); }
.btn--outline { background: transparent; color: #fff; border-color: rgba(255, 255, 255, .38); }
.btn--outline:hover { background: rgba(255, 255, 255, .1); color: #fff; border-color: #fff; }
.btn--ghost { background: #fff; color: var(--red); border-color: var(--red-line); }
.btn--ghost:hover { background: var(--red-soft); color: var(--red-dark); border-color: var(--red); }
.btn--sm { min-height: 40px; padding: 9px 16px; font-size: 13.5px; }
.btn--block { width: 100%; }

.badge-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 0; }
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 11px;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: #fff;
  color: #4b535d;
  font-size: 12.5px;
  font-weight: 600;
}
.badge .icon { width: 14px; height: 14px; color: var(--red); }
.badge--red { background: var(--red-soft); border-color: var(--red-line); color: var(--red-dark); }
.badge--dark { background: var(--ink); border-color: var(--ink); color: #fff; }
.badge--dark .icon { color: var(--gold); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  color: var(--red);
  font-size: 12.5px;
  font-weight: 800;
  letter-spacing: .14em;
  text-transform: uppercase;
}
.eyebrow::before {
  content: "";
  width: 30px; height: 2px;
  background: var(--red);
}
.eyebrow--light { color: #ffb3b2; }
.eyebrow--light::before { background: var(--gold); }

/* --------------------------------------------------------------------------
   首页 Hero
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(900px 420px at 82% 18%, rgba(204, 0, 1, .28), transparent 62%),
    radial-gradient(700px 500px at 6% 92%, rgba(245, 168, 0, .10), transparent 60%),
    linear-gradient(135deg, #101317 0%, #171b20 55%, #0c0e11 100%);
  color: #fff;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .045) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, .9), transparent 92%);
  pointer-events: none;
}
.hero::after {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 5px;
  background: linear-gradient(to bottom, var(--red), var(--gold));
  opacity: .9;
}
.hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(0, .96fr);
  align-items: center;
  gap: 48px;
  min-height: 590px;
  padding: 72px 0 88px;
}
.hero__copy { max-width: 660px; }
.hero h1 {
  color: #fff;
  font-size: clamp(2.2rem, 4.4vw, 3.9rem);
  line-height: 1.12;
  letter-spacing: -.02em;
  margin-bottom: 22px;
  text-wrap: balance;
}
.hero h1 em { font-style: normal; color: var(--gold); }
.hero h1 .red { color: #ff5a5b; }
.hero__lead {
  max-width: 610px;
  color: #c8ced6;
  font-size: 17px;
  line-height: 1.85;
  margin-bottom: 28px;
}
.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; }
.hero__points {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin-top: 26px;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, .12);
  color: #d9dde3;
  font-size: 13.5px;
}
.hero__points span { display: inline-flex; align-items: center; gap: 7px; }
.hero__points .icon { width: 16px; height: 16px; color: var(--gold); }

.hero__visual { position: relative; }
.hero__visual::before {
  content: "";
  position: absolute;
  inset: 12% 5% 8%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(204, 0, 1, .32), transparent 66%);
  filter: blur(18px);
}
.hero__visual img {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: auto;
  filter: drop-shadow(0 30px 44px rgba(0, 0, 0, .48));
}
.hero-card {
  position: absolute;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: rgba(255, 255, 255, .96);
  color: var(--ink);
  border-left: 3px solid var(--red);
  border-radius: 3px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, .28);
  font-size: 12.5px;
  font-weight: 700;
  line-height: 1.35;
  white-space: nowrap;
}
.hero-card .icon { width: 19px; height: 19px; color: var(--red); }
.hero-card small { display: block; color: var(--muted); font-size: 10.5px; font-weight: 500; }
.hero-card--1 { top: 10%; left: 0; animation: floaty 7s ease-in-out infinite; }
.hero-card--2 { right: 0; bottom: 18%; animation: floaty 8s ease-in-out .8s infinite; }
.hero-card--3 { left: 7%; bottom: 4%; animation: floaty 7.5s ease-in-out 1.4s infinite; }
@keyframes floaty {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-7px); }
}

/* --------------------------------------------------------------------------
   数据条 / 快捷入口
   -------------------------------------------------------------------------- */
.stats-band {
  position: relative;
  z-index: 3;
  margin-top: -34px;
}
.stats-band__inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: #fff;
  border: 1px solid var(--line);
  border-top: 4px solid var(--red);
  box-shadow: var(--shadow);
  border-radius: var(--radius);
  overflow: hidden;
}
.stat {
  padding: 22px 24px;
  border-right: 1px solid var(--line);
}
.stat:last-child { border-right: 0; }
.stat b {
  display: block;
  color: var(--ink);
  font-size: clamp(1.45rem, 2.4vw, 1.95rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -.02em;
}
.stat b span { color: var(--red); }
.stat small { display: block; margin-top: 5px; color: var(--muted); font-size: 12.5px; }

.quick-links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 20px;
}
.quick-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  font-weight: 700;
  font-size: 14.5px;
  transition: border-color .2s, transform .2s, box-shadow .2s;
}
.quick-link:hover {
  color: var(--red);
  border-color: var(--red-line);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}
.quick-link .icon { width: 22px; height: 22px; color: var(--red); }
.quick-link small { display: block; color: var(--muted); font-size: 11.5px; font-weight: 500; }
.quick-link__arrow { margin-left: auto; color: #b8bec7; width: 16px; height: 16px; }

/* --------------------------------------------------------------------------
   区块 / 标题
   -------------------------------------------------------------------------- */
.section { padding: clamp(56px, 7vw, 90px) 0; }
.section--alt { background: var(--bg-alt); }
.section--tight { padding: clamp(38px, 5vw, 58px) 0; }
.section--dark {
  background:
    radial-gradient(700px 380px at 92% 0%, rgba(204, 0, 1, .22), transparent 62%),
    var(--dark);
  color: #b9c0c9;
}
.section--dark h2, .section--dark h3 { color: #fff; }
.section--dark .lead { color: #aeb5bf; }
.section-head { max-width: 760px; margin-bottom: 40px; }
.section-head--center { margin-inline: auto; text-align: center; }
.section-head--center .eyebrow { justify-content: center; }
.section-head h2 { margin-bottom: 12px; }
.section-head .lead { color: var(--muted); font-size: 16.5px; line-height: 1.85; margin: 0; }
.section-head .lead a { font-weight: 600; }
.section-head__more {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 30px;
}
.link-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
}
.link-more .icon { width: 16px; height: 16px; }

/* --------------------------------------------------------------------------
   卡片 / 网格
   -------------------------------------------------------------------------- */
.grid { display: grid; gap: 20px; }
.grid > *, .split > *, .article-layout > * { min-width: 0; }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid--gap-lg { gap: 28px; }

.card {
  position: relative;
  padding: 28px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform .25s, box-shadow .25s, border-color .25s;
}
.card:hover {
  transform: translateY(-3px);
  border-color: #d8b9b8;
  box-shadow: var(--shadow);
}
.card h3 { margin-bottom: 10px; }
.card p { color: var(--body); font-size: 14.5px; line-height: 1.8; margin-bottom: 0; }
.card__icon {
  display: grid;
  place-items: center;
  width: 50px; height: 50px;
  margin-bottom: 18px;
  border-radius: var(--radius);
  background: var(--red-soft);
  color: var(--red);
}
.card__icon .icon { width: 26px; height: 26px; }
.card__num {
  position: absolute;
  top: 14px; right: 20px;
  color: #f0f1f3;
  font-size: 46px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -.04em;
  pointer-events: none;
}
.card__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 18px;
  font-size: 13.5px;
  font-weight: 700;
}
.card__link .icon { width: 15px; height: 15px; }
.card--service { padding-top: 32px; overflow: hidden; }
.card--service::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 3px;
  background: var(--red);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s;
}
.card--service:hover::before { transform: scaleX(1); }
.card--flush { padding: 0; overflow: hidden; }
.card--flush .card__body { padding: 24px 26px 26px; }
.card--dark { background: var(--dark-2); border-color: #2c3138; }
.card--dark h3 { color: #fff; }
.card--dark p { color: #aeb5bf; }

.feature-list { display: grid; gap: 12px; margin: 20px 0 0; padding: 0; list-style: none; }
.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin: 0;
  color: var(--body);
  font-size: 14.5px;
  line-height: 1.7;
}
.feature-list .icon { width: 18px; height: 18px; margin-top: 3px; color: var(--red); }
.feature-list--light li { color: #c3c9d1; }
.feature-list--light .icon { color: var(--gold); }

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(32px, 5vw, 64px);
  align-items: center;
}
.split--media-right { direction: rtl; }
.split--media-right > * { direction: ltr; }
.media-frame {
  position: relative;
  padding: 14px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.media-frame img { display: block; width: 100%; border-radius: 3px; }
.media-frame--scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.media-frame--scroll img { min-width: 640px; }
.media-frame::before {
  content: "";
  position: absolute;
  left: -10px; top: -10px;
  width: 56px; height: 56px;
  border-left: 3px solid var(--red);
  border-top: 3px solid var(--red);
  border-radius: 2px 0 0 0;
}
.media-caption {
  margin-top: 12px;
  color: var(--muted);
  font-size: 12.5px;
  text-align: center;
}
.check-panel {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 18px;
  margin-top: 20px;
  padding: 20px;
  background: #fff;
  border: 1px solid var(--line);
  border-left: 4px solid var(--red);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.check-panel span { display: flex; gap: 8px; align-items: flex-start; font-size: 13.5px; color: var(--body); }
.check-panel .icon { width: 16px; height: 16px; margin-top: 3px; color: var(--red); }

/* --------------------------------------------------------------------------
   流程步骤
   -------------------------------------------------------------------------- */
.steps {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
  counter-reset: step;
}
.steps--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.steps--6 { grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 12px; }
.step {
  position: relative;
  padding: 22px 20px 20px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.step::before {
  counter-increment: step;
  content: "0" counter(step);
  display: block;
  margin-bottom: 12px;
  color: var(--red);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .16em;
}
.step h3 { font-size: 15.5px; margin-bottom: 7px; }
.step p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }
.step::after {
  content: "";
  position: absolute;
  top: 34px; right: -17px;
  width: 17px; height: 2px;
  background: var(--line-strong);
}
.step:last-child::after { display: none; }

/* --------------------------------------------------------------------------
   提示框 / 表格
   -------------------------------------------------------------------------- */
.answer {
  margin: 28px 0;
  padding: 22px 26px;
  background: linear-gradient(90deg, var(--red-soft) 0%, #fff 88%);
  border-left: 4px solid var(--red);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.answer__label {
  display: block;
  margin-bottom: 6px;
  color: var(--red);
  font-size: 11.5px;
  font-weight: 800;
  letter-spacing: .12em;
}
.answer p { margin: 0; color: var(--ink); font-size: 16px; line-height: 1.8; }
.answer p + p { margin-top: 8px; }

.callout {
  margin: 22px 0;
  padding: 16px 20px;
  background: var(--gold-soft);
  border: 1px solid #f1ddb0;
  border-radius: var(--radius);
  color: #5e4515;
  font-size: 14px;
  line-height: 1.8;
}
.callout strong { color: #3f2e0a; }
.callout--red { background: var(--red-soft); border-color: var(--red-line); color: #6b2222; }
.callout--red strong { color: var(--red-dark); }

.table-wrap {
  margin: 20px 0 28px;
  overflow-x: auto;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  -webkit-overflow-scrolling: touch;
}
table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  font-size: 14px;
  line-height: 1.65;
}
caption {
  padding: 13px 16px;
  color: var(--muted);
  font-size: 12.5px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  background: #fafbfc;
}
th {
  padding: 13px 16px;
  background: #1b1f24;
  color: #fff;
  font-weight: 700;
  text-align: left;
  white-space: nowrap;
}
td {
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  color: var(--body);
  vertical-align: top;
}
tbody tr:nth-child(even) { background: #fafbfc; }
tbody tr:hover { background: #fff7f6; }
td strong { color: var(--ink); }
td .badge { font-size: 11.5px; padding: 3px 8px; }
.table-note { margin: -16px 0 28px; color: var(--muted); font-size: 12.5px; }

/* --------------------------------------------------------------------------
   FAQ
   -------------------------------------------------------------------------- */
.faq { display: grid; gap: 12px; max-width: 920px; }
.faq--wide { max-width: none; }
.faq-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color .2s, box-shadow .2s;
}
.faq-item[open] { border-color: #dcbebd; box-shadow: var(--shadow-sm); }
.faq-item summary {
  position: relative;
  padding: 17px 52px 17px 20px;
  color: var(--ink);
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.6;
  cursor: pointer;
  list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  position: absolute;
  top: 50%; right: 20px;
  width: 24px; height: 24px;
  margin-top: -12px;
  color: var(--red);
  font-size: 22px;
  font-weight: 400;
  line-height: 22px;
  text-align: center;
  transition: transform .2s;
}
.faq-item[open] summary::after { content: "−"; }
.faq-item summary:hover { color: var(--red); }
.faq-item__a {
  padding: 0 52px 20px 20px;
  color: var(--body);
  font-size: 14.5px;
  line-height: 1.85;
}
.faq-item__a p:last-child { margin-bottom: 0; }
.faq-item__a ul { margin-bottom: 0; }

/* --------------------------------------------------------------------------
   页内 Hero（内页）
   -------------------------------------------------------------------------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 18px 0 0;
  color: var(--muted);
  font-size: 12.5px;
}
.breadcrumbs a { color: var(--muted); }
.breadcrumbs a:hover { color: var(--red); }
.breadcrumbs span[aria-current] { color: var(--ink); font-weight: 600; }
.breadcrumbs .sep { color: #b6bcc4; }

.page-hero {
  position: relative;
  overflow: hidden;
  padding: 14px 0 54px;
  background:
    radial-gradient(620px 320px at 94% 8%, rgba(204, 0, 1, .07), transparent 65%),
    linear-gradient(180deg, #f7f8f9 0%, #fff 100%);
  border-bottom: 1px solid var(--line);
}
.page-hero::after {
  content: "";
  position: absolute;
  right: -80px; bottom: -140px;
  width: 460px; height: 460px;
  border: 1px solid rgba(204, 0, 1, .10);
  border-radius: 50%;
  box-shadow: 0 0 0 60px rgba(204, 0, 1, .025), 0 0 0 120px rgba(204, 0, 1, .018);
  pointer-events: none;
}
.page-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, .75fr);
  gap: 48px;
  align-items: start;
  padding-top: 26px;
}
.page-hero h1 { margin-bottom: 14px; text-wrap: balance; }
.page-hero .lead {
  max-width: 760px;
  color: #4a525c;
  font-size: 16.5px;
  line-height: 1.85;
  margin-bottom: 0;
}
.page-hero__actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }

.quick-facts {
  padding: 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-top: 4px solid var(--red);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.quick-facts h2 {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  font-size: 15px;
  letter-spacing: .02em;
}
.quick-facts h2 .icon { width: 18px; height: 18px; color: var(--red); }
.quick-facts dl { margin: 0; display: grid; gap: 11px; }
.quick-facts dl > div {
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr);
  gap: 10px;
  padding-bottom: 11px;
  border-bottom: 1px dashed var(--line);
  font-size: 13px;
  line-height: 1.6;
}
.quick-facts dl > div:last-child { padding-bottom: 0; border-bottom: 0; }
.quick-facts dt { color: var(--muted); }
.quick-facts dd { margin: 0; color: var(--ink); font-weight: 600; }
.quick-facts dd a { color: var(--red); }
.quick-facts__foot {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  color: var(--muted);
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   内容页 / 文章
   -------------------------------------------------------------------------- */
.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 270px;
  gap: clamp(30px, 5vw, 64px);
  align-items: start;
}
.article-body {
  max-width: 800px;
  font-size: 16px;
  line-height: 1.95;
  color: var(--body);
}
.article-body > p { margin-bottom: 1.1em; }
.article-body h2 {
  margin: 44px 0 16px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: clamp(1.35rem, 2.4vw, 1.7rem);
}
.article-body h2:first-of-type { margin-top: 16px; border-top: 0; padding-top: 0; }
.article-body h3 { margin: 28px 0 10px; font-size: 1.15rem; }
.article-body h4 { margin: 22px 0 8px; font-size: 1rem; }
.article-body ul, .article-body ol { margin: 0 0 1.2em; padding-left: 1.35em; }
.article-body li { margin: .45em 0; }
.article-body li::marker { color: var(--red); }
.article-body a { text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }
.article-body blockquote {
  margin: 24px 0;
  padding: 16px 22px;
  border-left: 4px solid var(--gold);
  background: #fffbf0;
  color: #5d4a1c;
}
.article-body img { border-radius: var(--radius); border: 1px solid var(--line); }
.article-body table { font-size: 13.5px; }
.article-body .table-wrap { margin: 24px 0; }
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
  margin: 18px 0 26px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 12.5px;
}
.article-meta span { display: inline-flex; align-items: center; gap: 6px; }
.article-meta .icon { width: 14px; height: 14px; }
.article-meta__tag { padding: 3px 8px; background: var(--red-soft); color: var(--red); border-radius: 2px; font-weight: 700; }

.toc {
  position: sticky;
  top: 100px;
  padding: 20px;
  background: #fafbfc;
  border: 1px solid var(--line);
  border-left: 3px solid var(--red);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 13px;
}
.toc h2 { font-size: 13px; letter-spacing: .08em; color: var(--muted); margin-bottom: 12px; }
.toc ul { display: grid; gap: 6px; margin: 0; padding: 0; list-style: none; }
.toc ul a { color: #4a525c; line-height: 1.5; display: block; padding: 3px 0 3px 10px; border-left: 2px solid transparent; margin-left: -11px; }
.toc ul a:hover { color: var(--red); }
.toc ul a.is-active { color: var(--red); font-weight: 700; border-left-color: var(--red); }
.toc__cta { margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--line); }
.toc__cta p { margin: 0 0 10px; font-size: 12px; line-height: 1.7; }
.toc__cta .btn { width: 100%; }

.aside-cta {
  padding: 26px;
  background: var(--dark);
  color: #b9c0c9;
  border-radius: var(--radius);
  position: relative;
  overflow: hidden;
}
.aside-cta::before {
  content: "";
  position: absolute;
  right: -50px; top: -50px;
  width: 160px; height: 160px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(204, 0, 1, .35), transparent 68%);
}
.aside-cta h2, .aside-cta h3 { color: #fff; font-size: 18px; position: relative; }
.aside-cta p { font-size: 13px; line-height: 1.8; position: relative; }
.aside-cta .btn { margin-top: 6px; position: relative; }
.aside-cta__phone {
  display: block;
  margin: 12px 0 4px;
  color: #fff;
  font-size: 21px;
  font-weight: 800;
  letter-spacing: .02em;
}
.aside-cta__phone:hover { color: var(--gold); }

.article-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}
.article-nav a {
  padding: 14px 16px;
  background: #fafbfc;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.6;
}
.article-nav a:hover { border-color: var(--red-line); color: var(--red); background: #fff7f6; }
.article-nav small { display: block; color: var(--muted); font-size: 11px; font-weight: 500; margin-bottom: 3px; }
.article-nav a:last-child { text-align: right; }

/* --------------------------------------------------------------------------
   案例 / 机型
   -------------------------------------------------------------------------- */
.case-card { display: flex; flex-direction: column; }
.case-card__media {
  position: relative;
  display: flex;
  align-items: flex-end;
  min-height: 150px;
  padding: 20px;
  background:
    linear-gradient(135deg, rgba(17, 20, 24, .92), rgba(17, 20, 24, .55)),
    radial-gradient(circle at 80% 10%, rgba(204, 0, 1, .45), transparent 55%),
    #22272d;
  color: #fff;
  overflow: hidden;
}
.case-card__media::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .06) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, .8), transparent);
}
.case-card__media .icon {
  position: absolute;
  top: 14px; right: 16px;
  width: 54px; height: 54px;
  color: rgba(255, 255, 255, .13);
  stroke-width: 1;
}
.case-card__tag {
  position: relative;
  z-index: 1;
  padding: 4px 9px;
  background: var(--red);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .04em;
  border-radius: 2px;
}
.case-card__metric {
  position: relative;
  z-index: 1;
  margin-left: 10px;
  font-size: 12px;
  color: #dfe3e8;
}
.case-card__body { padding: 22px 24px 24px; display: flex; flex-direction: column; flex: 1; }
.case-card h3 { font-size: 1.08rem; margin-bottom: 8px; }
.case-card p { margin: 0; color: var(--body); font-size: 13.5px; line-height: 1.8; }
.case-card__result {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  color: #5a626d;
  font-size: 12.5px;
}
.case-card__result strong { color: var(--red); }

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}
.filter-btn {
  padding: 8px 16px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 3px;
  color: #4a525c;
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: .2s;
}
.filter-btn:hover { border-color: var(--red-line); color: var(--red); }
.filter-btn.is-active { background: var(--red); border-color: var(--red); color: #fff; }
.is-hidden { display: none !important; }

.model-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.model-card {
  position: relative;
  padding: 26px;
  background: #fff;
  border: 1px solid var(--line);
  border-top: 3px solid var(--ink);
  border-radius: 0 0 var(--radius) var(--radius);
  transition: .25s;
}
.model-card:hover { border-top-color: var(--red); box-shadow: var(--shadow); transform: translateY(-3px); }
.model-card__series { color: var(--muted); font-size: 12px; font-weight: 700; letter-spacing: .1em; }
.model-card h3 { margin: 5px 0 4px; font-size: 1.5rem; }
.model-card__power { display: block; margin-bottom: 14px; color: var(--red); font-size: 14px; font-weight: 800; }
.model-card p { margin: 0 0 12px; font-size: 13.5px; line-height: 1.75; color: var(--body); }
.model-card ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 3px; }
.model-card li { font-size: 12.5px; color: var(--muted); }
.model-card li b { color: #4a525c; font-weight: 600; }

/* --------------------------------------------------------------------------
   联系 / 表单
   -------------------------------------------------------------------------- */
.contact-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: 32px; align-items: start; }
.contact-list { display: grid; gap: 18px; margin: 0; padding: 0; list-style: none; }
.contact-item { display: flex; gap: 14px; align-items: flex-start; }
.contact-item__icon {
  display: grid;
  place-items: center;
  width: 44px; height: 44px;
  flex: none;
  background: var(--red-soft);
  color: var(--red);
  border-radius: var(--radius);
}
.contact-item__icon .icon { width: 21px; height: 21px; }
.contact-item h3 { margin: 0 0 3px; font-size: 13.5px; color: var(--muted); font-weight: 600; }
.contact-item p, .contact-item a { margin: 0; color: var(--ink); font-size: 15px; line-height: 1.7; }
.contact-item a:hover { color: var(--red); }
.contact-item small { display: block; color: var(--muted); font-size: 11.5px; margin-top: 2px; }
.contact-item .phone-strong { font-size: 21px; font-weight: 800; color: var(--red); letter-spacing: .02em; }

.form-card {
  padding: 28px;
  background: #fff;
  border: 1px solid var(--line);
  border-top: 4px solid var(--red);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.form-card h2 { font-size: 1.4rem; margin-bottom: 5px; }
.form-card > p { color: var(--muted); font-size: 13.5px; margin-bottom: 20px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.field { margin-bottom: 14px; }
.field label { display: block; margin-bottom: 6px; color: #3b424b; font-size: 13px; font-weight: 600; }
.field label .req { color: var(--red); }
.field input, .field select, .field textarea {
  width: 100%;
  padding: 11px 13px;
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  background: #fff;
  color: var(--ink);
  font-family: inherit;
  font-size: 14px;
  line-height: 1.5;
  transition: border-color .2s, box-shadow .2s;
}
.field textarea { min-height: 100px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--red);
  box-shadow: 0 0 0 3px rgba(204, 0, 1, .10);
}
.form-note { margin: 10px 0 0; color: var(--muted); font-size: 11.5px; line-height: 1.7; }
.form-status {
  display: none;
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: 3px;
  font-size: 13px;
  line-height: 1.7;
}
.form-status.is-ok { display: block; background: #eef9f0; border: 1px solid #c6e7cd; color: #256b36; }
.form-status.is-err { display: block; background: var(--red-soft); border: 1px solid var(--red-line); color: var(--red-dark); }

.map-card {
  margin-top: 20px;
  padding: 20px;
  background: #fafbfc;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 13.5px;
  line-height: 1.8;
}
.map-card h3 { font-size: 14px; margin-bottom: 6px; }
.map-card p { margin: 0 0 8px; color: var(--body); }
.map-card a { font-weight: 700; }

/* --------------------------------------------------------------------------
   CTA 横幅
   -------------------------------------------------------------------------- */
.cta-band {
  position: relative;
  overflow: hidden;
  padding: clamp(42px, 6vw, 64px) 0;
  background:
    radial-gradient(720px 360px at 88% 0%, rgba(204, 0, 1, .32), transparent 66%),
    linear-gradient(120deg, #101317, #1b1f24);
  color: #fff;
}
.cta-band::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 5px;
  background: linear-gradient(to bottom, var(--gold), var(--red));
}
.cta-band__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
}
.cta-band h2 { color: #fff; font-size: clamp(1.5rem, 2.8vw, 2.15rem); margin-bottom: 10px; }
.cta-band p { margin: 0; color: #b9c0c9; font-size: 14.5px; max-width: 640px; }
.cta-band__actions { display: flex; flex-wrap: wrap; gap: 12px; flex: none; }
.cta-band__phone {
  display: block;
  margin-top: 12px;
  color: var(--gold);
  font-size: 15px;
  font-weight: 700;
}
.cta-band__phone:hover { color: #fff; }

/* --------------------------------------------------------------------------
   页脚
   -------------------------------------------------------------------------- */
.footer {
  padding: 62px 0 26px;
  background: #111418;
  color: #9fa7b1;
  font-size: 13.5px;
  line-height: 1.75;
}
.footer a { color: #c3c9d1; }
.footer a:hover { color: #fff; }
.footer__top {
  display: grid;
  grid-template-columns: 1.55fr .95fr .95fr 1.15fr;
  gap: 40px;
}
.footer__brand .brand { margin-bottom: 14px; }
.footer__brand .brand__text strong { color: #fff; }
.footer__brand .brand__text small { color: #8f97a1; }
.footer__brand p { margin: 0 0 10px; color: #9fa7b1; font-size: 13px; }
.footer__brand .footer-phone {
  display: inline-block;
  margin: 4px 0 8px;
  color: #fff;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: .02em;
}
.footer__brand .footer-phone:hover { color: var(--gold); }
.footer__brand address { margin: 8px 0 0; font-style: normal; font-size: 12.5px; color: #8f97a1; }
.footer h3 {
  margin: 4px 0 16px;
  color: #fff;
  font-size: 14px;
  letter-spacing: .05em;
}
.footer ul { display: grid; gap: 8px; margin: 0; padding: 0; list-style: none; }
.footer li { margin: 0; }
.footer__contact li { display: flex; gap: 8px; align-items: flex-start; color: #9fa7b1; }
.footer__contact .icon { width: 15px; height: 15px; margin-top: 3px; color: var(--red); }
.footer__bottom {
  display: flex;
  justify-content: space-between;
  gap: 12px 28px;
  flex-wrap: wrap;
  margin-top: 42px;
  padding-top: 20px;
  border-top: 1px solid #282d33;
  color: #767e88;
  font-size: 12px;
  line-height: 1.7;
}
.footer__bottom p { margin: 0; }
.footer__bottom .footer-links { display: flex; flex-wrap: wrap; gap: 12px; }
.footer__disclaimer {
  max-width: 920px;
  margin-top: 10px !important;
  color: #6b737d !important;
  font-size: 11.5px !important;
}

.back-top {
  position: fixed;
  right: 22px; bottom: 22px;
  z-index: 60;
  display: grid;
  place-items: center;
  width: 44px; height: 44px;
  background: var(--red);
  color: #fff;
  border: 0;
  border-radius: 4px;
  box-shadow: 0 8px 22px rgba(204, 0, 1, .28);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: .25s;
}
.back-top.is-visible { opacity: 1; visibility: visible; transform: none; }
.back-top:hover { background: var(--red-dark); }
.back-top .icon { width: 20px; height: 20px; }

/* --------------------------------------------------------------------------
   杂项
   -------------------------------------------------------------------------- */
.notice-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: #fff;
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 13px;
  color: #5a626d;
}
.notice-bar .icon { width: 17px; height: 17px; color: var(--gold); flex: none; }

.info-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.info-box {
  padding: 22px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.info-box h3 { display: flex; align-items: center; gap: 8px; font-size: 15px; margin-bottom: 8px; }
.info-box h3 .icon { width: 18px; height: 18px; color: var(--red); }
.info-box p { margin: 0; font-size: 13.5px; line-height: 1.8; color: var(--body); }

.kb-list { display: grid; gap: 14px; }
.kb-item {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr) auto;
  gap: 22px;
  align-items: center;
  padding: 22px 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: .25s;
}
.kb-item:hover { border-color: var(--red-line); box-shadow: var(--shadow-sm); transform: translateX(3px); }
.kb-item__cat {
  color: var(--red);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .06em;
}
.kb-item h3 { margin: 0 0 5px; font-size: 1.05rem; }
.kb-item h3 a { color: var(--ink); }
.kb-item h3 a:hover { color: var(--red); }
.kb-item p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }
.kb-item__meta { color: var(--muted); font-size: 11.5px; white-space: nowrap; text-align: right; }
.kb-item__arrow { width: 20px; height: 20px; color: var(--red); margin-top: 4px; }

.page-404 {
  display: grid;
  place-items: center;
  min-height: 62vh;
  padding: 80px 0;
  text-align: center;
}
.page-404 .code { color: var(--red); font-size: clamp(4rem, 12vw, 8rem); font-weight: 800; line-height: 1; letter-spacing: -.06em; }
.page-404 p { max-width: 520px; margin: 12px auto 24px; color: var(--muted); }
.page-404__actions { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }

.js .reveal { opacity: 0; transform: translateY(16px); transition: opacity .55s ease, transform .55s ease; }
.js .reveal.is-visible { opacity: 1; transform: none; }

/* --------------------------------------------------------------------------
   响应式
   -------------------------------------------------------------------------- */
@media (max-width: 1180px) {
  .nav { gap: 15px; }
  .nav > a { font-size: 13.5px; }
  .header-phone { display: none; }
  .hero__inner { gap: 30px; }
}

@media (max-width: 1024px) {
  .nav {
    position: fixed;
    top: 0; right: 0; bottom: 0;
    z-index: 90;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: min(86vw, 360px);
    margin: 0;
    padding: 92px 24px 32px;
    background: #fff;
    box-shadow: -20px 0 50px rgba(0, 0, 0, .16);
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: scale(.98);
    transform-origin: right center;
    transition: opacity .22s ease, transform .22s ease, visibility .22s;
  }
  body.nav-open .nav {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: none;
  }
  .nav > a {
    padding: 15px 4px;
    border-bottom: 1px solid var(--line);
    font-size: 15px;
  }
  .nav > a::after { display: none; }
  .nav > a.is-active { color: var(--red); }
  .nav-toggle { display: grid; }
  .site-header__actions { margin-left: auto; }
  .hero__inner { grid-template-columns: 1fr; min-height: 0; padding: 58px 0 78px; }
  .hero__copy { max-width: 720px; }
  .hero__visual { max-width: 640px; margin: 0 auto; width: 100%; }
  .hero-card--1 { left: 2%; }
  .hero-card--2 { right: 2%; }
  .stats-band__inner { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(2) { border-right: 0; }
  .stat:nth-child(1), .stat:nth-child(2) { border-bottom: 1px solid var(--line); }
  .quick-links { grid-template-columns: repeat(2, 1fr); }
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .steps, .steps--4, .steps--6 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .step::after { display: none; }
  .page-hero__inner { grid-template-columns: 1fr; gap: 26px; }
  .quick-facts { max-width: 560px; }
  .article-layout { grid-template-columns: minmax(0, 1fr); }
  .article-body { max-width: 820px; }
  .toc { position: static; order: -1; max-width: 820px; }
  .model-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .contact-grid { grid-template-columns: 1fr; }
  .split { grid-template-columns: 1fr; }
  .split--media-right { direction: ltr; }
  .footer__top { grid-template-columns: 1.4fr 1fr 1fr; }
  .footer__brand { grid-column: 1 / -1; }
  .cta-band__inner { flex-direction: column; align-items: flex-start; gap: 22px; }
  .info-grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .container { width: calc(100% - 32px); }
  .topbar__note { font-size: 11.5px; }
  .topbar__contact a:last-child, .topbar__contact .sep { display: none; }
  .site-header__inner { min-height: 66px; gap: 12px; }
  .brand__mark { width: 40px; height: 40px; }
  .brand__text strong { font-size: 20px; }
  .brand__text small { font-size: 10px; }
  .hero__inner { padding: 46px 0 70px; }
  .hero h1 { font-size: clamp(1.9rem, 8vw, 2.9rem); }
  .hero__lead { font-size: 15.5px; }
  .hero-card { display: none; }
  .stats-band { margin-top: -24px; }
  .stat { padding: 18px 16px; }
  .stat b { font-size: 1.45rem; }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .quick-links { grid-template-columns: 1fr; }
  .section-head__more { display: block; }
  .section-head__more .link-more { margin-top: 12px; }
  .steps, .steps--4, .steps--6 { grid-template-columns: 1fr; }
  .model-grid { grid-template-columns: 1fr; }
  .check-panel { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer__top { grid-template-columns: 1fr; gap: 28px; }
  .footer { padding-top: 46px; }
  .footer__bottom { display: block; }
  .footer__bottom .footer-links { margin-top: 10px; }
  .kb-item { grid-template-columns: 1fr; gap: 8px; }
  .kb-item__meta { text-align: left; }
  .article-nav { grid-template-columns: 1fr; }
  .article-nav a:last-child { text-align: left; }
  .page-hero { padding-bottom: 40px; }
  .page-hero__actions .btn { flex: 1 1 auto; }
  .cta-band__actions .btn { width: 100%; }
  .quick-facts { padding: 20px; }
  .table-wrap { margin-left: -2px; margin-right: -2px; }
  .article-body { font-size: 15.5px; }
  .article-body h2 { margin-top: 34px; }
  .article-body .table-wrap { margin-left: -16px; margin-right: -16px; border-radius: 0; }
  .article-body table { min-width: 560px; }
}

@media (max-width: 480px) {
  .topbar__note { display: none; }
  .topbar__inner { justify-content: flex-end; min-height: 32px; }
}

@media (max-width: 420px) {
  .stats-band__inner { grid-template-columns: 1fr; }
  .stat { border-right: 0; border-bottom: 1px solid var(--line); }
  .stat:last-child { border-bottom: 0; }
  .brand__text small { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .js .reveal { opacity: 1; transform: none; }
}

@media print {
  .topbar, .site-header, .footer, .cta-band, .toc, .aside-cta, .back-top, .breadcrumbs { display: none !important; }
  .article-layout { display: block; }
  body { color: #000; }
  a { color: #000; }
}