/* ==========================================================================
   广西田东昊润新材料科技有限公司 · 官网样式
   设计基调：洁净 + 工业精密。白与浅灰承载产品图，深藏蓝建立专业感，
   琥珀色只用于 CTA 与关键数据强调。
   断点：480 / 768 / 1024 / 1440，移动优先。
   ========================================================================== */

/* ---------- 设计变量 ---------- */
:root {
  --ink: #0d1b2a;
  --navy: #0b2e4f;
  --navy-deep: #071f36;
  --navy-soft: #16456f;
  --amber: #b8631a;
  --amber-bright: #d98324;
  --paper: #ffffff;
  --stone: #f4f6f8;
  --stone-deep: #e9edf1;
  --line: #e0e5ea;
  --muted: #5b6b7a;
  --muted-light: #8496a6;

  --ff: "Inter", -apple-system, BlinkMacSystemFont, "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;

  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-md: 1.125rem;
  --fs-lg: clamp(1.25rem, 1.6vw, 1.5rem);
  --fs-xl: clamp(1.5rem, 2.4vw, 2rem);
  --fs-2xl: clamp(1.9rem, 3.2vw, 2.75rem);
  --fs-hero: clamp(2.1rem, 5vw, 3.9rem);

  --sp-1: 0.5rem;
  --sp-2: 1rem;
  --sp-3: 1.5rem;
  --sp-4: 2rem;
  --sp-5: 3rem;
  --sp-6: 4rem;
  --sp-7: 6rem;

  --radius: 4px;
  --radius-lg: 8px;
  --shadow-sm: 0 1px 2px rgba(13, 27, 42, 0.06);
  --shadow-md: 0 12px 32px rgba(13, 27, 42, 0.10);
  --container: 1200px;
  --header-h: 72px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--ff);
  font-size: var(--fs-base);
  line-height: 1.7;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { margin: 0; font-weight: 600; line-height: 1.25; letter-spacing: -0.01em; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button { font-family: inherit; }

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--navy);
  color: #fff;
  padding: 12px 20px;
  z-index: 999;
}
.skip-link:focus { left: 8px; top: 8px; }

:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}

/* ---------- 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: background 0.2s var(--ease), color 0.2s var(--ease),
              border-color 0.2s var(--ease), transform 0.2s var(--ease);
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--amber); color: #fff; }
.btn-primary:hover { background: var(--amber-bright); }
.btn-ghost { border-color: rgba(255, 255, 255, 0.45); color: #fff; }
.btn-ghost:hover { background: rgba(255, 255, 255, 0.12); border-color: #fff; }
.btn-outline { border-color: var(--line); color: var(--ink); }
.btn-outline:hover { border-color: var(--navy); color: var(--navy); }
.btn-light { background: #fff; color: var(--navy); }
.btn-light:hover { background: var(--stone); }
.btn-sm { padding: 9px 18px; font-size: var(--fs-xs); }
.btn-lg { padding: 15px 32px; font-size: var(--fs-base); }
.btn svg { width: 18px; height: 18px; }

/* ---------- 页眉 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.site-header.is-scrolled {
  border-bottom-color: var(--line);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-3);
  height: var(--header-h);
}

.brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand img { height: 42px; width: auto; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  background: var(--navy);
  color: #fff;
  font-weight: 700;
  font-size: 1.15rem;
  border-radius: var(--radius);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong { font-size: var(--fs-sm); letter-spacing: 0.02em; color: var(--navy); }
.brand-text small { font-size: 0.68rem; color: var(--muted-light); letter-spacing: 0.12em; text-transform: uppercase; }

.nav {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
}
.nav a {
  position: relative;
  font-size: var(--fs-sm);
  color: var(--ink);
  padding: 6px 0;
  white-space: nowrap;
  transition: color 0.2s var(--ease);
}
.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--amber);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s var(--ease);
}
.nav a:hover { color: var(--navy); }
.nav a:hover::after, .nav a.is-active::after { transform: scaleX(1); }
.nav a.is-active { color: var(--navy); font-weight: 500; }

.header-actions { display: flex; align-items: center; gap: 12px; }
.lang-switch {
  display: flex;
  align-items: center;
  font-size: var(--fs-xs);
  letter-spacing: 0.06em;
  color: var(--muted);
}
.lang-switch a { padding: 4px 8px; border: 1px solid var(--line); border-radius: var(--radius); }
.lang-switch a:hover { border-color: var(--navy); color: var(--navy); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 0 9px;
  background: none;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  height: 1.5px;
  background: var(--ink);
  transition: transform 0.25s var(--ease), opacity 0.2s var(--ease);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ---------- 首页首屏（无图设计：渐变 + 等高线纹理） ---------- */
/* 高度策略：≥1025px 用视口比例撑满（内容垂直居中，上下留白对称）；
   平板/手机改为内容驱动高度，避免小屏出现一大块死白（深色空区）。 */
.hero {
  position: relative;
  display: flex;
  align-items: center;
  min-height: min(80vh, 700px);
  min-height: min(80svh, 700px);
  padding: clamp(64px, 10vh, 120px) 0 clamp(56px, 8vh, 96px);
  color: #fff;
  overflow: hidden;
  background:
    radial-gradient(1100px 520px at 82% -10%, rgba(184, 99, 26, 0.28), transparent 62%),
    radial-gradient(900px 480px at -10% 110%, rgba(30, 84, 128, 0.45), transparent 60%),
    linear-gradient(168deg, #0d3a63 0%, var(--navy) 46%, var(--navy-deep) 100%);
}
.hero-contours {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  color: rgba(255, 255, 255, 0.14);
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 31, 54, 0.18) 0%, rgba(7, 31, 54, 0.06) 42%, rgba(7, 31, 54, 0.72) 100%);
}
.hero-inner {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: var(--fs-xs);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.78);
  margin-bottom: var(--sp-2);
}
.hero-eyebrow::before {
  content: "";
  width: 32px;
  height: 1px;
  background: var(--amber-bright);
}
.hero h1 {
  font-size: var(--fs-hero);
  font-weight: 600;
  line-height: 1.12;
  /* 11.2em ≈ 11 个汉字宽：中文主标题在此宽度下会自然断成 10/10 两行，
     正好落在「·」分隔符处；配合 balance 避免末行只剩一两个字。 */
  max-width: 11.2em;
  margin-bottom: var(--sp-2);
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.25);
  text-wrap: balance;
}
/* 英文标题按单词断行，需要更宽的容器，否则会被压成 5 行 */
html[lang="en"] .hero h1 { max-width: 16em; }
.hero-sub {
  max-width: 44em;
  font-size: var(--fs-md);
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.86);
  margin-bottom: var(--sp-3);
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }

.hero-scroll {
  position: absolute;
  right: 32px;
  bottom: 28px;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-xs);
  letter-spacing: 0.2em;
  color: rgba(255, 255, 255, 0.6);
  writing-mode: vertical-rl;
}
.hero-scroll::after {
  content: "";
  width: 1px;
  height: 48px;
  background: linear-gradient(180deg, rgba(255,255,255,0.6), transparent);
}

/* ---------- 数据条 ---------- */
.stats-band {
  position: relative;
  z-index: 2;
  background: var(--navy);
  color: #fff;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.stat {
  padding: clamp(24px, 4vw, 40px) clamp(12px, 2vw, 28px);
  border-left: 1px solid rgba(255, 255, 255, 0.12);
}
.stat:first-child { border-left: none; }
.stat-value {
  font-size: clamp(1.8rem, 3.4vw, 2.7rem);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: #fff;
}
.stat-suffix { font-size: 0.5em; font-weight: 500; color: var(--amber-bright); margin-left: 4px; }
.stat-label { margin-top: 10px; font-size: var(--fs-sm); color: rgba(255, 255, 255, 0.62); }

/* ---------- 区块通用 ---------- */
.section { padding: clamp(52px, 6.4vw, 88px) 0; }
.section-stone { background: var(--stone); }
.section-tight { padding: clamp(40px, 5vw, 64px) 0; }
/* 仅承载一段导语的白色区块：收掉下内边距，避免与下一个白底区块之间
   出现 180px 以上的“空洞”（品质页、产品页、关于页的导语段）。 */
.section-intro { padding-bottom: clamp(12px, 2vw, 28px); }

.section-head { max-width: 760px; margin-bottom: clamp(32px, 4vw, 56px); }
.section-head.is-center { margin-left: auto; margin-right: auto; text-align: center; }
.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: var(--fs-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 12px;
  font-weight: 500;
}
.section-eyebrow::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--amber);
}
.section-head.is-center .section-eyebrow::before { display: none; }
.section-head h2 {
  font-size: var(--fs-2xl);
  color: var(--navy);
  margin-bottom: var(--sp-2);
  text-wrap: balance;
}
.section-lead { color: var(--muted); font-size: var(--fs-md); line-height: 1.8; }
/* 双栏区块内的独立标题（研发与检测 / 检测能力等） */
.block-title {
  font-size: var(--fs-2xl);
  color: var(--navy);
  margin-bottom: 16px;
  text-wrap: balance;
}

.section-foot { margin-top: clamp(28px, 4vw, 44px); }
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--navy);
  border-bottom: 1px solid var(--line);
  padding-bottom: 4px;
  transition: gap 0.2s var(--ease), border-color 0.2s var(--ease);
}
.link-arrow:hover { gap: 14px; border-color: var(--amber); }
.link-arrow svg { width: 16px; height: 16px; }

/* ---------- 产品卡（首页紧凑版） ---------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: clamp(20px, 2.5vw, 32px);
}
.product-grid-compact {
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(16px, 2vw, 24px);
}
.product-card {
  display: flex;
  flex-direction: column;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.3s var(--ease);
}
.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}
.product-card-media {
  position: relative;
  aspect-ratio: 4 / 3;
  background: var(--stone-deep);
  overflow: hidden;
}
.product-grid-compact .product-card-media { aspect-ratio: 3 / 2; }
.product-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease);
}
.product-card:hover .product-card-media img { transform: scale(1.04); }
.product-card-body { padding: 22px 22px 24px; display: flex; flex-direction: column; flex: 1; }
.product-grid-compact .product-card-body {
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 20px;
}
.product-card-body h3 { font-size: var(--fs-lg); color: var(--navy); margin-bottom: 8px; }
.product-grid-compact .product-card-body h3 { font-size: var(--fs-md); margin-bottom: 0; }
.product-more { flex-shrink: 0; border: none; padding: 0; color: var(--amber); font-weight: 500; }
.product-more svg { width: 14px; height: 14px; }

/* ---------- 优势网格 ---------- */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.advantage {
  background: var(--paper);
  padding: clamp(24px, 3vw, 36px);
  transition: background 0.25s var(--ease);
}
.advantage:hover { background: var(--stone); }
.advantage-icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  background: rgba(11, 46, 79, 0.06);
  color: var(--navy);
  margin-bottom: 18px;
}
.advantage-icon svg { width: 22px; height: 22px; }
.advantage h3 { font-size: var(--fs-base); color: var(--navy); margin-bottom: 8px; }
.advantage p { font-size: var(--fs-sm); color: var(--muted); line-height: 1.75; }

/* ---------- 关于区块（右栏为关键数据面板） ---------- */
.about-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(32px, 5vw, 72px);
  align-items: center;
}
/* 右栏是大图时改为顶部对齐，避免短文案被垂直居中后上方出现大片空白 */
.about-split.is-top { align-items: start; }
/* 图文区块配图：统一圆角，与产品卡/证书卡保持同一视觉语言 */
.about-media img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
}
.about-body h2 { font-size: var(--fs-2xl); color: var(--navy); margin-bottom: var(--sp-2); text-wrap: balance; }
.about-body p { color: var(--muted); font-size: var(--fs-md); line-height: 1.85; margin-bottom: var(--sp-2); }
.about-points {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px 24px;
  margin-top: var(--sp-3);
}
.about-point { display: flex; gap: 10px; font-size: var(--fs-sm); }
.about-point svg { flex-shrink: 0; width: 18px; height: 18px; color: var(--amber); margin-top: 3px; }

/* 关键数据面板：2×2 大数字卡，替代原实拍图 */
.about-facts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(12px, 1.5vw, 18px);
}
.fact {
  padding: clamp(22px, 2.6vw, 34px) clamp(18px, 2.2vw, 26px);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 8px;
  min-height: 132px;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.fact:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.fact strong {
  font-size: clamp(1.5rem, 2.4vw, 2.1rem);
  font-weight: 650;
  color: var(--navy);
  line-height: 1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}
.fact strong small {
  font-size: 0.5em;
  font-weight: 550;
  color: var(--amber);
  margin-left: 2px;
}
.fact span { font-size: var(--fs-sm); color: var(--muted); line-height: 1.5; }

/* ---------- 资质（首页大卡） ---------- */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: clamp(16px, 2vw, 24px);
}
.cert-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 14px 14px 18px;
  text-align: center;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.3s var(--ease);
}
.cert-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}
.cert-card-media {
  display: block;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--stone);
  aspect-ratio: 3 / 4;
  margin-bottom: 14px;
}
.cert-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--ease);
}
.cert-card:hover .cert-card-media img { transform: scale(1.03); }
.cert-card-name {
  font-size: var(--fs-sm);
  color: var(--navy);
  line-height: 1.55;
  min-height: 3.1em;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ---------- 行业卡 ---------- */
.industry-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}
.industry-card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 280px;
  padding: 24px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  color: #fff;
  background: var(--navy);
  isolation: isolate;
}
.industry-card img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -2;
  transition: transform 0.6s var(--ease);
}
.industry-card::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(180deg, rgba(7, 31, 54, 0.15) 0%, rgba(7, 31, 54, 0.85) 100%);
}
.industry-card:hover img { transform: scale(1.05); }
.industry-card h3 { font-size: var(--fs-lg); margin-bottom: 6px; }
.industry-card p { font-size: var(--fs-sm); color: rgba(255, 255, 255, 0.75); line-height: 1.6; }

/* ---------- 市场 ---------- */
.market-wrap {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: clamp(32px, 5vw, 64px);
  align-items: center;
}
.market-list { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 24px; }
.market-item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}
.market-item strong { font-size: var(--fs-base); color: var(--navy); min-width: 5em; }
.market-item span { font-size: var(--fs-sm); color: var(--muted); }
.market-visual {
  position: relative;
  aspect-ratio: 16 / 11;
  border-radius: var(--radius-lg);
  background: var(--navy);
  overflow: hidden;
}
.market-visual img { width: 100%; height: 100%; object-fit: cover; opacity: 0.55; }

/* ---------- 新闻卡 ---------- */
.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: clamp(20px, 2.5vw, 32px);
}
.news-card {
  display: flex;
  flex-direction: column;
  border-bottom: 1px solid var(--line);
  padding-bottom: 20px;
  transition: border-color 0.2s var(--ease);
}
.news-card:hover { border-bottom-color: var(--amber); }
.news-card time {
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  color: var(--muted-light);
  margin-bottom: 10px;
}
.news-card h3 { font-size: var(--fs-md); color: var(--navy); line-height: 1.5; margin-bottom: 8px; }
.news-card p { font-size: var(--fs-sm); color: var(--muted); line-height: 1.7; }

/* ---------- CTA 区块 ---------- */
.cta-band {
  position: relative;
  padding: clamp(56px, 7vw, 88px) 0;
  background: var(--navy-deep);
  color: #fff;
  overflow: hidden;
}
.cta-band::before {
  content: "";
  position: absolute;
  right: -8%;
  top: -40%;
  width: 520px;
  height: 520px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 50%;
}
.cta-band::after {
  content: "";
  position: absolute;
  right: 4%;
  bottom: -55%;
  width: 420px;
  height: 420px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 50%;
}
.cta-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  flex-wrap: wrap;
}
.cta-inner h2 { font-size: var(--fs-2xl); margin-bottom: 10px; text-wrap: balance; }
.cta-inner p { color: rgba(255, 255, 255, 0.72); max-width: 42em; }

/* ---------- 内页横幅 ---------- */
.page-hero {
  position: relative;
  padding: clamp(56px, 9vw, 104px) 0 clamp(40px, 6vw, 64px);
  background: var(--navy);
  color: #fff;
  overflow: hidden;
}
.page-hero-media { position: absolute; inset: 0; }
.page-hero-media img { width: 100%; height: 100%; object-fit: cover; opacity: 0.28; }
.page-hero-inner { position: relative; z-index: 1; }
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: var(--fs-xs);
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: 16px;
}
.breadcrumb a:hover { color: #fff; }
.breadcrumb span { color: rgba(255, 255, 255, 0.35); }
.page-hero h1 { font-size: var(--fs-2xl); margin-bottom: 12px; }
.page-hero p { color: rgba(255, 255, 255, 0.75); max-width: 52em; font-size: var(--fs-md); }

/* ---------- 正文排版 ---------- */
.prose { max-width: 76ch; }
.prose p { margin-bottom: 1.1em; color: var(--ink); line-height: 1.9; }
/* 长文首段做“导语”：字号略大、深藏蓝，建立阅读层次 */
.prose-lead > p:first-child {
  font-size: var(--fs-md);
  color: var(--navy);
  line-height: 1.95;
}
.prose h3 { font-size: var(--fs-lg); color: var(--navy); margin: 2em 0 0.7em; }
.prose h4 { font-size: var(--fs-md); color: var(--navy); margin: 1.6em 0 0.6em; }
.prose ul, .prose ol { margin: 0 0 1.2em 1.2em; list-style: disc; }
.prose li { margin-bottom: 0.5em; line-height: 1.8; }
.prose a { color: var(--amber); border-bottom: 1px solid rgba(184, 99, 26, 0.3); }
.prose table { width: 100%; border-collapse: collapse; margin: 1.5em 0; font-size: var(--fs-sm); }
.prose th, .prose td { border: 1px solid var(--line); padding: 10px 14px; text-align: left; }
.prose th { background: var(--stone); font-weight: 600; }

/* ---------- 参数表 ---------- */
.spec-table-wrap {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--paper);
}
.spec-table { width: 100%; border-collapse: collapse; font-size: var(--fs-sm); }
.spec-table th {
  background: var(--navy);
  color: #fff;
  font-weight: 500;
  text-align: left;
  padding: 14px 18px;
  font-size: var(--fs-xs);
  letter-spacing: 0.06em;
}
.spec-table td { padding: 13px 18px; border-bottom: 1px solid var(--line); }
.spec-table tr:last-child td { border-bottom: none; }
.spec-table tr:nth-child(even) td { background: #fafbfc; }
.spec-table td:last-child {
  font-weight: 600;
  color: var(--navy);
  font-variant-numeric: tabular-nums;
}
.spec-note { margin-top: 12px; font-size: var(--fs-xs); color: var(--muted-light); line-height: 1.7; }

/* 对比表横向滚动（移动端） */
.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}
.table-scroll table { min-width: 720px; border-collapse: collapse; width: 100%; font-size: var(--fs-sm); }
.table-scroll th, .table-scroll td { padding: 13px 16px; border-bottom: 1px solid var(--line); text-align: left; }
.table-scroll thead th { background: var(--stone); color: var(--navy); font-weight: 600; white-space: nowrap; }
.table-scroll tbody tr:last-child td { border-bottom: none; }

/* ---------- 产品详情 ---------- */
.product-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(32px, 5vw, 64px);
  align-items: center;
}
.product-hero-media {
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--stone-deep);
}
.product-hero-media img { width: 100%; height: 100%; object-fit: cover; }
.product-hero h1 { font-size: var(--fs-2xl); color: var(--navy); margin: 8px 0 16px; }
.product-hero .product-summary { font-size: var(--fs-md); color: var(--muted); line-height: 1.8; margin-bottom: var(--sp-3); }
.product-highlight {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin-bottom: var(--sp-3);
}
.product-highlight strong {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  color: var(--amber);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}
.product-highlight span { font-size: var(--fs-sm); color: var(--muted); }
.product-actions { display: flex; flex-wrap: wrap; gap: 12px; }

/* ---------- 表单 ---------- */
.form-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: clamp(24px, 4vw, 40px);
}
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field-full { grid-column: 1 / -1; }
.field label { font-size: var(--fs-xs); letter-spacing: 0.04em; color: var(--muted); }
.field-input {
  width: 100%;
  padding: 12px 14px;
  font-family: inherit;
  font-size: 16px;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.field-input:focus {
  outline: none;
  border-color: var(--navy);
  box-shadow: 0 0 0 3px rgba(11, 46, 79, 0.08);
}
textarea.field-input { resize: vertical; min-height: 110px; }
.field-error { font-size: var(--fs-xs); color: #b3261e; }
.form-actions { margin-top: 22px; display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.form-hint { font-size: var(--fs-xs); color: var(--muted-light); }
.form-success {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 18px;
  background: #edf7ee;
  border: 1px solid #c8e6c9;
  border-radius: var(--radius);
  color: #256029;
  font-size: var(--fs-sm);
  margin-bottom: 20px;
}
.form-success svg { width: 18px; height: 18px; }

/* ---------- 联系信息 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.15fr; gap: clamp(32px, 5vw, 64px); }
.contact-item { display: flex; gap: 14px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.contact-item svg { flex-shrink: 0; width: 20px; height: 20px; color: var(--amber); margin-top: 3px; }
.contact-item h3 { font-size: var(--fs-sm); color: var(--navy); margin-bottom: 4px; }
.contact-item p, .contact-item a { font-size: var(--fs-sm); color: var(--muted); line-height: 1.7; }
/* 二维码卡片样式统一在文件末尾「联系页」区块定义，这里不再重复声明 */

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--navy-deep);
  color: rgba(255, 255, 255, 0.72);
  /* 与上方 CTA 区块同为深蓝，用一条极细分隔线区分两段，避免糊成一片 */
  border-top: 1px solid rgba(255, 255, 255, 0.09);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.3fr;
  gap: clamp(28px, 4vw, 56px);
  padding: clamp(48px, 6vw, 72px) 0 clamp(36px, 4vw, 52px);
}
.footer-brand-name { font-size: var(--fs-base); color: #fff; font-weight: 600; margin-bottom: 10px; line-height: 1.5; }
.footer-slogan { font-size: var(--fs-sm); color: rgba(255, 255, 255, 0.55); line-height: 1.7; max-width: 26em; }
.footer-col h3 {
  font-size: var(--fs-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.42);
  margin-bottom: 16px;
  font-weight: 500;
}
.footer-col li { margin-bottom: 10px; }
.footer-col a { font-size: var(--fs-sm); color: rgba(255, 255, 255, 0.72); transition: color 0.2s var(--ease); }
.footer-col a:hover { color: #fff; }
.footer-contact li { display: flex; gap: 10px; align-items: flex-start; }
.footer-contact svg { flex-shrink: 0; margin-top: 4px; color: var(--amber-bright); }
.footer-contact li span, .footer-contact li a { font-size: var(--fs-sm); line-height: 1.65; }
.footer-contact .btn { margin-top: 18px; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.08); padding: 20px 0; }
.footer-bottom-inner {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: var(--fs-xs);
  color: rgba(255, 255, 255, 0.42);
}
.footer-bottom a:hover { color: rgba(255, 255, 255, 0.8); }
.footer-bottom .sep { margin: 0 10px; opacity: 0.4; }

/* ---------- 动效说明 ----------
   内容默认直接可见（不依赖 JS 的滚动入场），仅保留 hover/滚动等
   渐进增强动效。这样在无 JS、爬虫、打印与低端设备上都稳定。 */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .about-split, .market-wrap, .product-hero, .contact-grid { grid-template-columns: 1fr; }
  .header-cta { display: none; }
  .nav { gap: 16px; }
  .nav a { font-size: var(--fs-xs); }

  /* 平板：首屏改为内容驱动高度，不再用视口百分比撑高 */
  .hero {
    min-height: 0;
    padding: clamp(48px, 7vh, 80px) 0 clamp(44px, 6vh, 72px);
  }
}

@media (max-width: 768px) {
  :root { --header-h: 64px; }

  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 24px 24px;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-md);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s var(--ease), transform 0.2s var(--ease);
  }
  .nav.is-open { opacity: 1; transform: none; pointer-events: auto; }
  .nav a {
    font-size: var(--fs-base);
    padding: 14px 0;
    border-bottom: 1px solid var(--stone);
  }
  .nav a::after { display: none; }
  .nav-toggle { display: flex; }

  .hero { padding: 52px 0 56px; }
  .hero-scroll { display: none; }

  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat { border-left: none; border-top: 1px solid rgba(255, 255, 255, 0.12); }
  .stat:nth-child(odd) { border-right: 1px solid rgba(255, 255, 255, 0.12); }
  .stat:nth-child(-n+2) { border-top: none; }

  .about-points { grid-template-columns: 1fr; }
  .about-split { grid-template-columns: 1fr; }
  .product-grid-compact { grid-template-columns: 1fr 1fr; }
  .cert-grid { grid-template-columns: 1fr 1fr 1fr; }
  .market-list { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  /* 移动端放大页脚/面包屑链接的点击区域（纯文字链接原本只有 17~20px 高） */
  .footer-col a { display: inline-block; padding: 7px 0; }
  .footer-col li { margin-bottom: 2px; }
  .breadcrumb a { display: inline-block; padding: 5px 0; }
  .footer-bottom a { display: inline-block; padding: 5px 0; }
}

@media (max-width: 480px) {
  .container { padding: 0 18px; }
  .hero h1 { font-size: clamp(1.8rem, 8vw, 2.4rem); }
  .hero-actions .btn { width: 100%; }
  .product-grid, .product-grid-compact, .news-grid, .advantage-grid { grid-template-columns: 1fr; }
  .cert-grid { grid-template-columns: 1fr 1fr; }
  .about-facts { grid-template-columns: 1fr 1fr; }
  .footer-bottom-inner { flex-direction: column; gap: 8px; }
}

/* ---------- 联系页（无表单版式）与二维码灯箱 ---------- */
.contact-simple .contact-item { padding: 20px 0; }
.qr-wrap { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }
.qr-hint { margin-top: 16px; font-size: var(--fs-xs); color: var(--muted-light); text-align: center; }
button.qr-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  background: none;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 14px 14px 10px;
  cursor: zoom-in;
  font: inherit;
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease),
              box-shadow 0.2s var(--ease);
}
button.qr-item:hover {
  transform: translateY(-2px);
  border-color: var(--muted-light);
  box-shadow: var(--shadow-sm);
}
button.qr-item img { width: 116px; height: 116px; object-fit: contain; }
button.qr-item span { font-size: var(--fs-xs); color: var(--muted); letter-spacing: 0.04em; }
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(7, 31, 54, 0.88);
  padding: 32px;
  cursor: zoom-out;
}
.lightbox[hidden] { display: none; }
.lightbox img {
  max-width: min(520px, 90vw);
  max-height: 86vh;
  width: auto;
  border-radius: var(--radius-lg);
  background: #fff;
  padding: 12px;
}
.lightbox-close {
  position: absolute;
  top: 20px;
  right: 28px;
  background: none;
  border: none;
  color: #fff;
  font-size: 40px;
  line-height: 1;
  cursor: pointer;
}

/* ---------- 产品列表（标准卡）与产品文章页 ---------- */
.product-index-grid { grid-template-columns: repeat(3, 1fr); }
.product-index-grid .product-card-body h3 { margin-bottom: 10px; }
.product-index-grid .product-summary { margin-bottom: 16px; }
.product-article { max-width: 860px; }
.product-article-cover {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  margin-bottom: clamp(24px, 4vw, 40px);
}
.product-article .product-actions { margin-top: 32px; }

/* ---------- 联系页两栏版式 ---------- */
.contact-simple {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: center;
  max-width: 940px;
}
.contact-qr {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-left: clamp(20px, 3vw, 40px);
  border-left: 1px solid var(--line);
}
.contact-simple .qr-wrap { margin-top: 0; }
.contact-simple .qr-hint { text-align: center; max-width: 220px; }

@media (max-width: 768px) {
  .product-index-grid { grid-template-columns: 1fr; }
  .contact-simple { grid-template-columns: 1fr; gap: 32px; max-width: 100%; }
  .contact-qr { padding: 0; border-left: none; }
}