/* ============================================================
   AOLAI MATERIALS — 澳莱材料（肇庆）国际商贸有限公司
   企业官网样式：工业碳纤维质感 · 黑/白/警示黄
   Mobile-first：基础样式按 375px 编写，桌面在 min-width:768px 扩展
   ============================================================ */

/* ---------- 设计 Token ---------- */
:root {
  --bg: #F4F5F6;
  --surface: #FFFFFF;
  --ink: #14181C;
  --ink-2: #3A434B;
  --muted: #6B7680;
  --line: #E3E6E9;
  --dark: #0E1215;
  --dark-2: #151B20;
  --dark-line: #232B33;
  --accent: #F2B705;
  --accent-deep: #C99500;
  --radius: 10px;
  --container: 1200px;
  --header-h: 64px;
  --font-display: "Oswald", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

/* ---------- 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, p { margin: 0; }
button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; font-size: 16px; }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 20px; }

.section { padding: 56px 0; }
.section--dark { background: var(--dark); color: #E8ECEF; }

/* 区块标题 */
.section-head { margin-bottom: 32px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-display);
  font-size: 12px; letter-spacing: 3px; text-transform: uppercase;
  color: var(--accent-deep);
}
.eyebrow::before { content: ""; width: 28px; height: 2px; background: var(--accent); }
.section-head h2 {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 4vw, 2.5rem);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .5px;
  line-height: 1.15;
  margin-top: 8px;
  color: var(--ink);
}
.section--dark .section-head h2 { color: #FFFFFF; }
.section--dark .eyebrow { color: var(--accent); }
.section-sub { color: var(--muted); margin-top: 10px; max-width: 640px; font-size: 14.5px; }
.section--dark .section-sub { color: #9AA5AD; }

/* 按钮 */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 22px;
  font-family: var(--font-display);
  font-size: 13px; letter-spacing: 1.5px; text-transform: uppercase;
  border: 1px solid transparent;
  border-radius: 4px;
  transition: background .2s ease, color .2s ease, border-color .2s ease, transform .15s ease;
  min-height: 44px;
}
.btn:active { transform: translateY(1px); }
.btn--accent { background: var(--accent); color: #16120A; }
.btn--accent:hover { background: #FFC62E; }
.btn--dark { background: var(--ink); color: #fff; }
.btn--dark:hover { background: #262D34; }
.btn--ghost { border-color: rgba(255,255,255,.55); color: #fff; }
.btn--ghost:hover { background: rgba(255,255,255,.12); }
.btn--line { border-color: var(--ink); color: var(--ink); }
.btn--line:hover { background: var(--ink); color: #fff; }

/* ---------- 碳纤维纹理（签名元素） ---------- */
.cf-tex {
  background-image:
    linear-gradient(45deg, rgba(255,255,255,.05) 25%, transparent 25%, transparent 75%, rgba(255,255,255,.05) 75%),
    linear-gradient(-45deg, rgba(255,255,255,.05) 25%, transparent 25%, transparent 75%, rgba(255,255,255,.05) 75%);
  background-size: 16px 16px;
}
.cf-tex--gloss {
  background-image:
    linear-gradient(45deg, rgba(255,255,255,.07) 25%, transparent 25%, transparent 75%, rgba(255,255,255,.07) 75%),
    linear-gradient(-45deg, rgba(255,255,255,.07) 25%, transparent 25%, transparent 75%, rgba(255,255,255,.07) 75%),
    radial-gradient(120% 90% at 50% 0%, rgba(255,255,255,.10), transparent 60%);
  background-size: 16px 16px, 16px 16px, 100% 100%;
}

/* ---------- 顶栏 ---------- */
.topbar {
  display: none;
  background: var(--dark);
  color: #C7CFD5;
  font-size: 13px;
}
.topbar-inner { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.topbar a { color: #E8ECEF; }
.topbar .tb-item { display: inline-flex; align-items: center; gap: 6px; }
.topbar svg { width: 14px; height: 14px; stroke: var(--accent); }

/* ---------- 头部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 60;
  background: rgba(14,18,21,.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.header-inner { display: flex; align-items: center; gap: 16px; height: var(--header-h); }
.logo { display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-mark { width: 36px; height: 36px; display: block; }
.logo-text { line-height: 1.1; }
.logo-text strong {
  display: block;
  font-family: var(--font-display);
  font-size: 19px; font-weight: 600; letter-spacing: 2px;
  color: #fff;
}
.logo-text small { display: block; font-size: 10.5px; letter-spacing: 2.5px; color: #8E99A1; }

.main-nav { display: none; }
.nav-toggle {
  margin-left: auto;
  background: none; border: 0; padding: 10px;
  color: #fff; display: inline-flex;
}
.nav-toggle svg { width: 24px; height: 24px; }
.header-cta { margin-left: auto; display: none; }

/* 移动端抽屉 */
.mobile-nav {
  display: none;
  background: var(--dark-2);
  border-top: 1px solid var(--dark-line);
}
.mobile-nav.open { display: block; }
.mobile-nav a {
  display: block; padding: 14px 24px;
  color: #D7DEE3; font-size: 15px;
  border-bottom: 1px solid rgba(255,255,255,.06);
  font-family: var(--font-display); letter-spacing: 1px; text-transform: uppercase;
}
.mobile-nav a.active { color: var(--accent); }

@media (min-width: 768px) {
  .topbar { display: block; }
  .nav-toggle { display: none; }
  .main-nav { display: flex; align-items: center; gap: 4px; margin: 0 auto; }
  .main-nav a {
    display: inline-flex; align-items: center;
    padding: 10px 13px;
    font-family: var(--font-display);
    font-size: 13.5px; letter-spacing: 1.5px; text-transform: uppercase;
    color: #D7DEE3;
    border-bottom: 2px solid transparent;
    transition: color .2s, border-color .2s;
  }
  .main-nav a:hover { color: #fff; }
  .main-nav a.active { color: var(--accent); border-bottom-color: var(--accent); }
  .header-cta { display: inline-flex; }
  .header-cta .btn { min-height: 40px; padding: 9px 18px; }
}

/* ---------- 视图切换 ---------- */
.view { display: none; }
.view.active { display: block; }

/* ---------- Hero 轮播 ---------- */
.hero { position: relative; background: var(--dark); overflow: hidden; }
.hero-track { position: relative; height: 56vh; min-height: 380px; max-height: 640px; }
.hero-slide {
  position: absolute; inset: 0;
  opacity: 0; transition: opacity .7s ease;
  display: flex; align-items: center;
}
.hero-slide.active { opacity: 1; z-index: 1; }
.hero-slide .hero-bg {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  transform: scale(1.04);
}
.hero-slide.active .hero-bg { animation: hero-zoom 6s ease-out forwards; }
@keyframes hero-zoom { from { transform: scale(1.12); } to { transform: scale(1.04); } }
.hero-slide::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(8,11,13,.82) 0%, rgba(8,11,13,.45) 50%, rgba(8,11,13,.15) 100%);
}
.hero-content {
  position: relative; z-index: 2;
  width: 100%; max-width: var(--container);
  margin: 0 auto; padding: 0 20px;
  color: #fff;
}
.hero-kicker {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-display);
  font-size: 12px; letter-spacing: 3px; text-transform: uppercase;
  color: var(--accent);
  padding: 6px 12px;
  border: 1px solid rgba(242,183,5,.45);
  background: rgba(242,183,5,.08);
}
.hero-content h1 {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 6.5vw, 3.6rem);
  font-weight: 600; text-transform: uppercase;
  line-height: 1.08; letter-spacing: 1px;
  margin: 18px 0 14px;
  max-width: 15em;
}
.hero-content p { color: #C4CDD3; max-width: 46em; font-size: 15px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.hero-dots {
  position: absolute; z-index: 3; left: 50%; transform: translateX(-50%);
  bottom: 18px; display: flex; gap: 8px;
}
.hero-dots button {
  width: 9px; height: 9px; border-radius: 50%;
  border: 0; padding: 0;
  background: rgba(255,255,255,.35);
  transition: background .2s, transform .2s;
}
.hero-dots button.active { background: var(--accent); transform: scale(1.25); }
.hero-arrow {
  position: absolute; z-index: 3; top: 50%; transform: translateY(-50%);
  width: 44px; height: 44px;
  background: rgba(14,18,21,.55); border: 1px solid rgba(255,255,255,.25);
  color: #fff; display: inline-flex; align-items: center; justify-content: center;
  border-radius: 4px; transition: background .2s;
}
.hero-arrow:hover { background: var(--accent); color: #16120A; border-color: var(--accent); }
.hero-arrow svg { width: 20px; height: 20px; }
.hero-arrow--prev { left: 10px; }
.hero-arrow--next { right: 10px; }

/* ---------- 主营产品条 ---------- */
.prodline-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px;
  margin-top: 28px;
}
.prodline-card {
  display: flex; align-items: flex-start; gap: 10px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 13px 14px;
  transition: border-color .2s, transform .15s;
}
.prodline-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.prodline-card svg { width: 20px; height: 20px; flex-shrink: 0; color: var(--accent-deep); margin-top: 2px; }
.prodline-card strong { display: block; font-size: 14px; color: var(--ink); }
.prodline-card span { font-size: 12.5px; color: var(--muted); line-height: 1.5; }

/* ---------- 产品分类 ---------- */
.cat-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px;
}
.cat-card {
  position: relative; display: block;
  border-radius: var(--radius); overflow: hidden;
  background: var(--dark);
  aspect-ratio: 3 / 4;
}
.cat-card img {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}
.cat-card:hover img { transform: scale(1.06); }
.cat-card::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(10,13,16,0) 30%, rgba(10,13,16,.88) 88%);
}
.cat-card-body {
  position: absolute; left: 0; right: 0; bottom: 0; z-index: 2;
  padding: 16px 16px 14px;
  color: #fff;
}
.cat-card-body .c-no {
  font-family: var(--font-display); font-size: 11px; letter-spacing: 2px;
  color: var(--accent); text-transform: uppercase;
}
.cat-card-body h3 {
  font-family: var(--font-display);
  font-size: 17px; font-weight: 600; text-transform: uppercase; letter-spacing: .5px;
  margin-top: 2px;
}
.cat-card-body .c-more {
  display: inline-flex; align-items: center; gap: 6px;
  margin-top: 6px; font-size: 12.5px; color: #C4CDD3;
  text-transform: uppercase; letter-spacing: 1.5px; font-family: var(--font-display);
}
.cat-card-body .c-more svg { width: 15px; height: 15px; transition: transform .2s; }
.cat-card:hover .c-more { color: var(--accent); }
.cat-card:hover .c-more svg { transform: translateX(4px); }

/* ---------- 产品网格 ---------- */
.product-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px;
}
.p-card {
  display: flex; flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow .25s ease, transform .2s ease;
}
.p-card:hover { box-shadow: 0 14px 34px rgba(14,18,21,.12); transform: translateY(-3px); }
.p-media { position: relative; aspect-ratio: 1 / 1; overflow: hidden; background: #11161A; }
.p-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.p-card:hover .p-media img { transform: scale(1.06); }
.p-tag {
  position: absolute; top: 10px; left: 10px; z-index: 2;
  background: var(--accent); color: #16120A;
  font-family: var(--font-display);
  font-size: 10.5px; letter-spacing: 1.5px; text-transform: uppercase;
  padding: 3px 8px;
}
.p-body { padding: 13px 14px 15px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.p-body h3 { font-size: 14.5px; line-height: 1.4; color: var(--ink); font-weight: 600; }
.p-specs { display: flex; flex-wrap: wrap; gap: 5px; }
.p-specs span {
  font-size: 11px; color: var(--ink-2);
  background: var(--bg); border: 1px solid var(--line);
  padding: 2px 7px; border-radius: 3px;
}
.p-more {
  margin-top: auto;
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-display);
  font-size: 12px; letter-spacing: 1.5px; text-transform: uppercase;
  color: var(--accent-deep);
}
.p-more svg { width: 14px; height: 14px; }
.p-card:hover .p-more svg { transform: translateX(3px); }
.p-more { transition: color .2s; }

/* ---------- 筛选栏（产品页） ---------- */
.filter-bar { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 22px; }
.filter-btn {
  padding: 8px 15px;
  border: 1px solid var(--line); background: var(--surface);
  font-family: var(--font-display); font-size: 12.5px; letter-spacing: 1px; text-transform: uppercase;
  color: var(--ink-2); border-radius: 4px;
  min-height: 44px; display: inline-flex; align-items: center;
  transition: all .2s;
}
.filter-btn.active { background: var(--ink); color: #fff; border-color: var(--ink); }
.p-card.hide { display: none; }

/* ---------- Why Choose Us ---------- */
.why-layout { display: grid; gap: 28px; align-items: start; }
.why-points { display: grid; gap: 14px; margin-top: 22px; }
.why-point { display: flex; gap: 12px; }
.why-point .w-icon {
  flex-shrink: 0; width: 40px; height: 40px;
  border: 1px solid var(--line); background: var(--surface);
  border-radius: 6px;
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--accent-deep);
}
.why-point .w-icon svg { width: 20px; height: 20px; }
.why-point strong { display: block; font-size: 15px; color: var(--ink); }
.why-point p { font-size: 13.5px; color: var(--muted); margin-top: 2px; }
.why-collage { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.why-collage figure { margin: 0; position: relative; border-radius: 8px; overflow: hidden; }
.why-collage figure:first-child { grid-column: 1 / -1; aspect-ratio: 16 / 9; }
.why-collage figure:nth-child(n+2) { aspect-ratio: 4 / 3; }
.why-collage img { width: 100%; height: 100%; object-fit: cover; }

/* ---------- 全球网络 ---------- */
.global { position: relative; overflow: hidden; }
.global-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(60% 80% at 70% 20%, rgba(242,183,5,.07), transparent 60%),
    var(--dark);
}
.global-bg svg { position: absolute; inset: 0; width: 100%; height: 100%; opacity: .5; }
.global .section-head { position: relative; z-index: 2; }
.stats-row {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px;
  margin-top: 30px;
}
.stat-card {
  border: 1px solid var(--dark-line);
  background: rgba(255,255,255,.03);
  padding: 18px 14px;
  text-align: left;
}
.stat-card strong {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 5vw, 2.6rem); font-weight: 600;
  color: var(--accent);
  line-height: 1;
  display: block;
}
.stat-card span { color: #A9B3BB; font-size: 13px; margin-top: 6px; display: block; letter-spacing: .5px; }

/* ---------- 全产业链 ---------- */
.chain-grid { display: grid; gap: 12px; margin-top: 30px; }
.chain-step {
  display: flex; gap: 14px; align-items: flex-start;
  background: var(--surface);
  border: 1px solid var(--line); border-radius: 8px;
  padding: 18px 16px;
  transition: border-color .2s, transform .2s;
}
.chain-step:hover { border-color: var(--accent); transform: translateY(-2px); }
.chain-step .c-no {
  font-family: var(--font-display);
  font-size: 13px; letter-spacing: 2px;
  color: var(--accent-deep); flex-shrink: 0;
}
.chain-step strong { display: block; font-size: 15px; color: var(--ink); }
.chain-step span { font-size: 13px; color: var(--muted); line-height: 1.55; }

/* ---------- CTA 条 ---------- */
.cta-strip {
  background: var(--dark); color: #fff; position: relative; overflow: hidden;
}
.cta-inner {
  display: flex; flex-direction: column; gap: 18px;
  padding: 40px 0; position: relative; z-index: 2;
}
.cta-inner h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4vw, 2.2rem); font-weight: 600; text-transform: uppercase;
}
.cta-inner p { color: #A9B3BB; max-width: 560px; }
.cta-actions { display: flex; flex-wrap: wrap; gap: 12px; }

/* ---------- 页脚 ---------- */
.footer { background: #0A0D10; color: #A9B3BB; font-size: 13.5px; }
.footer-top {
  display: grid; gap: 28px;
  padding: 48px 0 36px;
  grid-template-columns: 1fr;
}
.footer h4 {
  font-family: var(--font-display);
  font-size: 14px; letter-spacing: 2px; text-transform: uppercase;
  color: #fff; margin-bottom: 14px;
}
.footer ul li { margin-bottom: 9px; }
.footer ul a { color: #A9B3BB; transition: color .2s; }
.footer ul a:hover { color: var(--accent); }
.footer .f-about p { line-height: 1.75; max-width: 360px; }
.footer .f-contact li { display: flex; gap: 9px; align-items: flex-start; }
.footer .f-contact svg { width: 15px; height: 15px; flex-shrink: 0; color: var(--accent-deep); margin-top: 4px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.07);
  padding: 16px 0;
  display: flex; flex-wrap: wrap; gap: 8px; justify-content: space-between;
  font-size: 12.5px;
}

/* ---------- 页面标题（子页） ---------- */
.page-hero {
  background: var(--dark); color: #fff;
  padding: 46px 0 40px;
  position: relative; overflow: hidden;
}
.page-hero::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(242,183,5,.06), transparent 55%); }
.page-hero .container { position: relative; z-index: 2; }
.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 5vw, 2.8rem); font-weight: 600; text-transform: uppercase;
}
.page-hero p { color: #9AA5AD; margin-top: 8px; max-width: 620px; }
.breadcrumb { font-size: 12.5px; color: #6E7A84; letter-spacing: 1px; margin-bottom: 10px; text-transform: uppercase; font-family: var(--font-display); }
.breadcrumb a { color: var(--accent); }

/* ---------- 关于页 ---------- */
.about-intro { display: grid; gap: 26px; align-items: center; }
.about-intro .ai-img { border-radius: var(--radius); overflow: hidden; }
.about-intro .ai-img img { width: 100%; object-fit: cover; aspect-ratio: 16 / 10; }
.about-intro h2 {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3.4vw, 2rem); font-weight: 600; text-transform: uppercase;
  margin: 14px 0 10px;
}
.about-intro p { color: var(--ink-2); margin-bottom: 10px; }
.value-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.value-card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px 16px;
}
.value-card svg { width: 26px; height: 26px; color: var(--accent-deep); }
.value-card h3 { font-family: var(--font-display); font-size: 16px; text-transform: uppercase; letter-spacing: .5px; margin: 10px 0 6px; }
.value-card p { font-size: 13.5px; color: var(--muted); }

/* ---------- 联系页 ---------- */
.contact-grid { display: grid; gap: 24px; }
.contact-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.contact-card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px 16px;
}
.contact-card svg { width: 24px; height: 24px; color: var(--accent-deep); }
.contact-card h3 { font-family: var(--font-display); font-size: 14px; text-transform: uppercase; letter-spacing: 1px; margin: 10px 0 6px; }
.contact-card p { font-size: 13.5px; color: var(--ink-2); }
.contact-card a { color: var(--ink); }
.contact-card a:hover { color: var(--accent-deep); }
.inquiry-form {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px 20px;
}
.inquiry-form h3 {
  font-family: var(--font-display); font-size: 18px; text-transform: uppercase; letter-spacing: 1px;
  margin-bottom: 16px;
}
.form-row { display: grid; grid-template-columns: 1fr; gap: 14px; }
.field label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: var(--ink-2); }
.field input, .field select, .field textarea {
  width: 100%;
  border: 1px solid var(--line); border-radius: 6px;
  padding: 12px 13px;
  background: var(--bg);
  color: var(--ink);
  transition: border-color .2s;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--accent-deep); background: #fff;
}
.field textarea { min-height: 120px; resize: vertical; }
.form-note { font-size: 12.5px; color: var(--muted); margin-top: 10px; }

/* ---------- 工具 ---------- */
.toast {
  position: fixed; left: 50%; bottom: 28px; transform: translate(-50%, 16px);
  background: var(--ink); color: #fff;
  padding: 12px 22px; border-radius: 6px;
  font-size: 14px; box-shadow: 0 12px 30px rgba(0,0,0,.3);
  opacity: 0; pointer-events: none; transition: opacity .3s, transform .3s;
  z-index: 99; max-width: 86vw; text-align: center;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }
.to-top {
  position: fixed; right: 16px; bottom: 16px; z-index: 50;
  width: 44px; height: 44px;
  background: var(--ink); color: #fff; border: 1px solid var(--dark-line);
  border-radius: 6px;
  display: inline-flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; transition: opacity .25s;
}
.to-top.show { opacity: 1; pointer-events: auto; }
.to-top svg { width: 20px; height: 20px; }
.to-top:hover { background: var(--accent); color: #16120A; }

/* 滚动揭示 */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .55s ease, transform .55s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero-slide.active .hero-bg { animation: none; }
}

/* ---------- 桌面端增强 ---------- */
@media (min-width: 768px) {
  .container { padding: 0 32px; }
  .section { padding: 76px 0; }

  .prodline-grid { grid-template-columns: repeat(3, 1fr); gap: 12px; }
  .cat-grid { grid-template-columns: repeat(3, 1fr); gap: 16px; }
  .product-grid { grid-template-columns: repeat(4, 1fr); gap: 16px; }
  .chain-grid { grid-template-columns: repeat(5, 1fr); gap: 14px; }
  .chain-step { flex-direction: column; }

  .why-layout { grid-template-columns: 1.05fr .95fr; gap: 48px; }
  .stats-row { grid-template-columns: repeat(4, 1fr); gap: 16px; }
  .cta-inner { flex-direction: row; align-items: center; justify-content: space-between; }

  .footer-top { grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; }
  .hero-track { height: 72vh; }
  .hero-content h1 { font-size: clamp(2.4rem, 5.4vw, 4rem); }

  .contact-grid { grid-template-columns: 1fr 1.25fr; gap: 32px; }
  .contact-cards { grid-template-columns: repeat(2, 1fr); }
  .form-row { grid-template-columns: repeat(2, 1fr); }
  .form-row .field--full { grid-column: 1 / -1; }

  .about-intro { grid-template-columns: 1fr 1fr; }
  .value-grid { grid-template-columns: repeat(4, 1fr); }
}

@media (min-width: 1024px) {
  .container { padding: 0 40px; }
  .topbar { font-size: 13px; }
}