/* ==========================================================================
   长沙星真化玻仪器有限公司 — 全局样式
   风格：简约 · 大气 · 专业
   VERSION: 2026-09-18.2  （极简改版：直角按钮 · 细边框取代投影 · 去悬浮位移）
   ========================================================================== */

:root {
  /* 品牌色板 —— 深邃科技蓝 */
  --c-primary: #0f4c96;         /* 主色：科技蓝（沉稳） */
  --c-primary-dark: #0a3768;
  --c-primary-light: #2a6ab8;
  --c-primary-soft: #edf3fb;    /* 浅蓝底 */
  --c-primary-softer: #f5f8fd;
  --c-accent: #12a594;          /* 点缀：实验室青绿 */
  --c-accent-soft: #e6f6f4;
  --c-gold: #c8a35a;            /* 金属质感点缀 */
  --c-highlight: #f46523;       /* 价格 / 促销强调 */
  --c-highlight-soft: #fff2ec;

  /* 中性色 */
  --c-bg: #ffffff;
  --c-bg-soft: #f4f7fb;
  --c-bg-deep: #07264d;
  --c-text: #1a2230;
  --c-text-2: #55617a;
  --c-text-3: #8b95a8;
  --c-line: #e4eaf3;

  /* 字体 */
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;

  /* 尺寸 */
  --max-w: 1200px;
  --radius: 4px;                 /* 极简：一律直角 */
  --radius-lg: 6px;
  /* 极简：不使用投影，层次全部交由细边框承担 */
  --shadow-sm: none;
  --shadow-md: none;
  --shadow-lg: none;

  --header-h: 76px;
  --transition: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

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

body {
  font-family: var(--font);
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea, select { font-family: inherit; font-size: inherit; }

::selection { background: var(--c-primary); color: #fff; }

/* 布局工具 */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: 96px 0; }
.section--soft { background: var(--c-bg-soft); }

.section-head { max-width: 640px; margin: 0 auto 60px; text-align: center; }
.section-head--left { margin: 0 0 48px; text-align: left; }
.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  letter-spacing: 2px;
  color: var(--c-accent);
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.section-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  letter-spacing: 1px;
  line-height: 1.3;
  color: var(--c-text);
}
.section-desc {
  margin-top: 16px;
  font-size: 16px;
  color: var(--c-text-2);
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 4px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 1px;
  transition: var(--transition);
  white-space: nowrap;
}
.btn--primary {
  background: var(--c-primary);
  color: #fff;
}
.btn--primary:hover { background: var(--c-primary-dark); }
.btn--ghost {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.55);
}
.btn--ghost:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.1);
}
.btn--outline {
  background: #fff;
  color: var(--c-primary);
  border: 1px solid var(--c-primary);
}
.btn--outline:hover {
  background: var(--c-primary);
  color: #fff;
}
.btn--accent {
  background: var(--c-accent);
  color: #fff;
}
.btn--accent:hover { background: #0e8b7d; }

/* ==========================================================================
   顶部导航
   ========================================================================== */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid transparent;
  transition: var(--transition);
}
.header.is-scrolled {
  border-bottom-color: var(--c-line);
}
.header__inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
}
.brand { display: flex; align-items: center; flex-shrink: 0; }
.brand__name {
  font-family: "LiSu", "STLiti", "华文隶书", "隶书", "SimLi", "STXingkai", serif;
  font-size: 23px;
  font-weight: 400;
  letter-spacing: 2.5px;
  color: var(--c-primary);
  line-height: 1.3;
  white-space: nowrap;
}

.nav { display: flex; align-items: center; gap: 2px; margin-left: auto; }
.nav__link {
  position: relative;
  padding: 10px 17px;
  font-size: 15px;
  color: var(--c-text-2);
  font-weight: 400;
  transition: color var(--transition);
}
.nav__link:hover { color: var(--c-primary); }
.nav__link.is-active { color: var(--c-primary); font-weight: 500; }
.nav__link.is-active::after {
  content: "";
  position: absolute;
  left: 17px; right: 17px; bottom: 2px;
  height: 1px;
  background: var(--c-primary);
}

.hd-contact {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
  flex-shrink: 0;
  line-height: 1.35;
}
.hd-contact a { font-size: 12.5px; color: var(--c-text-2); transition: color var(--transition); }
.hd-contact a:hover { color: var(--c-primary); }
.hd-contact a:first-child {
  font-size: 15px;
  font-weight: 600;
  color: var(--c-primary);
  letter-spacing: 0.3px;
}
.nav__contact { display: none; }

/* 页脚品牌名（隶书） */
.brand--footer {
  font-family: "LiSu", "STLiti", "华文隶书", "隶书", "SimLi", "STXingkai", serif;
  font-size: 20px;
  font-weight: 400;
  letter-spacing: 2px;
  color: #fff;
  line-height: 1.4;
  margin-bottom: 18px;
}

.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  color: var(--c-primary);
}
.nav-toggle svg { width: 24px; height: 24px; }

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-h);
  overflow: hidden;
  color: #fff;
  background:
    radial-gradient(1100px 520px at 82% -10%, rgba(31, 138, 107, 0.35), transparent 60%),
    radial-gradient(900px 500px at -8% 110%, rgba(42, 106, 184, 0.45), transparent 55%),
    linear-gradient(135deg, #07264d 0%, #0a3768 55%, #0f4c96 100%);
}
.hero__grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
  padding: 80px 0 110px;
}
.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.18);
  font-size: 13px;
  letter-spacing: 2px;
  margin-bottom: 26px;
}
.hero__eyebrow .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: #4fd1a5;
}
.hero h1 {
  font-size: clamp(34px, 5.4vw, 58px);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: 1px;
  margin-bottom: 22px;
}
.hero h1 .accent {
  background: linear-gradient(90deg, #4fd1a5, #7fe0c0);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero__lead {
  font-size: 17px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.82);
  max-width: 560px;
  margin-bottom: 38px;
}
.hero__actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero__stats {
  display: flex;
  gap: 40px;
  margin-top: 56px;
}
.hero__stat .num {
  font-size: 34px;
  font-weight: 700;
  color: #fff;
  line-height: 1;
}
.hero__stat .num em { font-style: normal; font-size: 18px; color: #4fd1a5; margin-left: 2px; }
.hero__stat .label { margin-top: 8px; font-size: 13px; color: rgba(255, 255, 255, 0.6); }

/* Hero 右侧视觉卡片 */
.hero__visual { position: relative; }
.hero__card {
  position: relative;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  backdrop-filter: blur(8px);
  padding: 30px;
}
.hero__card .tag {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 1px;
  color: #4fd1a5;
  background: rgba(79, 209, 165, 0.12);
  padding: 5px 14px;
  border-radius: 4px;
  margin-bottom: 18px;
}
.hero__card h3 { font-size: 20px; font-weight: 600; margin-bottom: 6px; }
.hero__card > p { font-size: 14px; color: rgba(255, 255, 255, 0.65); margin-bottom: 22px; }
.hero__list { display: grid; gap: 12px; }
.hero__list li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 16px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.06);
  font-size: 14.5px;
  transition: var(--transition);
}
.hero__list li:hover { background: rgba(255, 255, 255, 0.12); }
.hero__list .ic {
  width: 34px; height: 34px; flex-shrink: 0;
  border-radius: 4px;
  display: flex; align-items: center; justify-content: center;
}
.hero__list .ic svg { width: 18px; height: 18px; }
.ic--blue { background: rgba(63, 130, 255, 0.22); color: #8ab6ff; }
.ic--green { background: rgba(79, 209, 165, 0.2); color: #6fe0b8; }
.ic--gold { background: rgba(200, 163, 90, 0.24); color: #e6c98a; }
.ic--purple { background: rgba(167, 139, 250, 0.24); color: #cbb8ff; }
.hero__list li b { font-weight: 600; color: #fff; }
.hero__list li span { color: rgba(255, 255, 255, 0.62); font-size: 13px; }

/* 极简：已移除 Hero 装饰光斑（.hero__orb / .orb-1 / .orb-2） */

/* ==========================================================================
   通用卡片 / 特性
   ========================================================================== */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

.feature-card {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 34px 30px;
  transition: var(--transition);
}
.feature-card:hover {
  border-color: var(--c-primary);
}
.feature-card .ic {
  width: 56px; height: 56px;
  border-radius: 4px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 22px;
}
.feature-card .ic svg { width: 28px; height: 28px; }
.feature-card h3 { font-size: 19px; font-weight: 700; margin-bottom: 10px; }
.feature-card p { font-size: 14.5px; color: var(--c-text-2); }

.ic-blue { background: #eaf2fd; color: var(--c-primary-light); }
.ic-green { background: var(--c-accent-soft); color: var(--c-accent); }
.ic-gold { background: #f7f0e2; color: var(--c-gold); }
.ic-purple { background: #f0ebfb; color: #6a4fd0; }

/* ==========================================================================
   品牌信任条
   ========================================================================== */
.trust-bar {
  padding: 34px 0;
  background: #fff;
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
}
.trust-bar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.trust-bar__label { font-size: 13px; letter-spacing: 2px; color: var(--c-text-3); }
.trust-bar__logos { display: flex; align-items: center; gap: 40px; flex-wrap: wrap; }
.trust-item {
  display: flex; align-items: center; gap: 10px;
  font-size: 15px; color: var(--c-text-2); font-weight: 500;
}
.trust-item svg { width: 22px; height: 22px; color: var(--c-accent); }

/* ==========================================================================
   分类 / 产品卡片
   ========================================================================== */
.cat-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--c-line);
  transition: var(--transition);
}
.cat-card:hover { border-color: var(--c-primary); }
.cat-card__media {
  height: 190px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.cat-card__media svg { width: 84px; height: 84px; opacity: 0.92; }
.cat-card__body { padding: 26px 28px 30px; }
.cat-card__body h3 { font-size: 20px; font-weight: 700; margin-bottom: 10px; }
.cat-card__body p { font-size: 14.5px; color: var(--c-text-2); margin-bottom: 18px; }
.cat-card__tags { display: flex; flex-wrap: wrap; gap: 8px; }
.cat-card__tags span {
  font-size: 12px;
  padding: 5px 12px;
  border-radius: 4px;
  background: var(--c-bg-soft);
  color: var(--c-text-2);
}
.link-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--c-primary);
  margin-top: 20px;
  transition: var(--transition);
}
.link-more:hover { gap: 10px; color: var(--c-primary-light); }
.link-more svg { width: 16px; height: 16px; }

.media-blue { background: linear-gradient(135deg, #eaf2fd, #d6e6fb); color: var(--c-primary-light); }
.media-green { background: linear-gradient(135deg, #e7f4f0, #d2ece4); color: var(--c-accent); }
.media-gold { background: linear-gradient(135deg, #f7f0e2, #f0e3c6); color: var(--c-gold); }
.media-purple { background: linear-gradient(135deg, #f0ebfb, #e2d7f8); color: #6a4fd0; }

/* ==========================================================================
   服务流程 / 步骤
   ========================================================================== */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.step {
  position: relative;
  padding: 30px 26px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--c-line);
}
.step__num {
  font-size: 15px;
  font-weight: 700;
  color: var(--c-accent);
  letter-spacing: 1px;
  margin-bottom: 12px;
}
.step h4 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.step p { font-size: 14px; color: var(--c-text-2); }

/* ==========================================================================
   CTA 横幅
   ========================================================================== */
.cta-band {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(120deg, var(--c-primary-dark), var(--c-primary) 55%, var(--c-primary-light));
  color: #fff;
  padding: 64px 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}
.cta-band h2 { font-size: clamp(24px, 3.4vw, 34px); font-weight: 700; margin-bottom: 12px; }
.cta-band p { font-size: 15px; color: rgba(255, 255, 255, 0.78); max-width: 560px; }
.cta-band__actions { display: flex; gap: 14px; flex-shrink: 0; }
.cta-band .btn--ghost { color: #fff; }

/* ==========================================================================
   页脚
   ========================================================================== */
.footer {
  background: var(--c-bg-deep);
  color: rgba(255, 255, 255, 0.72);
  padding: 72px 0 0;
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 44px;
  padding-bottom: 52px;
}
.footer .brand__name { color: #fff; }
.footer .brand__sub { color: rgba(255, 255, 255, 0.5); }
.footer .brand__logo { background: rgba(255,255,255,0.12); }
.footer__about { margin-top: 18px; font-size: 14px; line-height: 1.9; color: rgba(255,255,255,0.6); max-width: 320px; }
.footer h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 20px;
}
.footer__links li { margin-bottom: 12px; }
.footer__links a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.62);
  transition: var(--transition);
}
.footer__links a:hover { color: #4fd1a5; padding-left: 4px; }
.footer__contact li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 16px;
  font-size: 14px;
}
.footer__contact svg { width: 18px; height: 18px; flex-shrink: 0; color: #4fd1a5; margin-top: 3px; }
.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 22px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
  flex-wrap: wrap;
}
.footer__bottom a { color: rgba(255, 255, 255, 0.55); }
.footer__bottom a:hover { color: #fff; }

/* ==========================================================================
   内页 Hero（子页面标题横幅）
   ========================================================================== */
.page-hero {
  position: relative;
  padding: calc(var(--header-h) + 76px) 0 76px;
  color: #fff;
  background:
    radial-gradient(900px 420px at 85% 0%, rgba(31,138,107,0.32), transparent 60%),
    linear-gradient(135deg, #07264d 0%, #0a3768 60%, #0f4c96 100%);
  overflow: hidden;
}
.page-hero h1 {
  font-size: clamp(30px, 4.4vw, 46px);
  font-weight: 700;
  letter-spacing: 1px;
  margin-bottom: 14px;
}
.page-hero p { font-size: 16px; color: rgba(255, 255, 255, 0.78); max-width: 640px; }
.crumb { display: flex; gap: 8px; font-size: 13px; color: rgba(255,255,255,0.55); margin-bottom: 22px; }
.crumb a:hover { color: #4fd1a5; }
.crumb span { color: rgba(255,255,255,0.35); }

/* ==========================================================================
   关于我们页
   ========================================================================== */
.about-intro { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.about-intro__media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 420px;
  background:
    radial-gradient(500px 300px at 20% 20%, rgba(79,209,165,0.2), transparent 60%),
    linear-gradient(150deg, #eaf2fd, #dcebf9);
  display: flex;
  align-items: center;
  justify-content: center;
}
.about-intro__media svg { width: 180px; height: 180px; color: var(--c-primary); opacity: 0.9; }
.about-intro__badge {
  position: absolute;
  left: 26px; bottom: 26px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: 4px;
  padding: 18px 22px;
  display: flex;
  align-items: center;
  gap: 14px;
}
.about-intro__badge .num { font-size: 30px; font-weight: 700; color: var(--c-primary); line-height: 1; }
.about-intro__badge .t { font-size: 13px; color: var(--c-text-2); }
.about-intro h2 { font-size: clamp(26px, 3.4vw, 36px); font-weight: 700; line-height: 1.35; margin-bottom: 20px; }
.about-intro p { color: var(--c-text-2); font-size: 15.5px; margin-bottom: 16px; }
.about-points { margin-top: 26px; display: grid; gap: 14px; }
.about-points li { display: flex; gap: 12px; align-items: flex-start; }
.about-points svg { width: 22px; height: 22px; color: var(--c-accent); flex-shrink: 0; margin-top: 2px; }

/* 价值观 */
.value-card {
  text-align: center;
  padding: 40px 30px;
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--c-line);
  transition: var(--transition);
}
.value-card:hover { border-color: var(--c-primary); }
.value-card .ic {
  width: 62px; height: 62px;
  margin: 0 auto 20px;
  border-radius: 4px;
  display: flex; align-items: center; justify-content: center;
}
.value-card .ic svg { width: 30px; height: 30px; }
.value-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.value-card p { font-size: 14px; color: var(--c-text-2); }

/* 发展历程时间线 */
.timeline { position: relative; max-width: 820px; margin: 0 auto; padding-left: 40px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 12px; top: 6px; bottom: 6px;
  width: 1px;
  background: var(--c-line);
}
.timeline__item { position: relative; padding-bottom: 40px; }
.timeline__item:last-child { padding-bottom: 0; }
.timeline__item::before {
  content: "";
  position: absolute;
  left: -34px; top: 6px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--c-accent);
}
.timeline__year { font-size: 14px; font-weight: 700; color: var(--c-accent); letter-spacing: 1px; margin-bottom: 6px; }
.timeline__item h4 { font-size: 17px; font-weight: 700; margin-bottom: 6px; }
.timeline__item p { font-size: 14.5px; color: var(--c-text-2); }

/* 资质证书 */
.cert-card {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 26px;
  text-align: center;
  transition: var(--transition);
}
.cert-card:hover { border-color: var(--c-primary); }
.cert-card .badge {
  width: 70px; height: 70px;
  margin: 0 auto 16px;
  border-radius: 4px;
  background: linear-gradient(135deg, #eaf2fd, #d6e6fb);
  display: flex; align-items: center; justify-content: center;
  color: var(--c-primary);
}
.cert-card .badge svg { width: 34px; height: 34px; }
.cert-card h4 { font-size: 16px; font-weight: 700; margin-bottom: 6px; }
.cert-card p { font-size: 13px; color: var(--c-text-3); }

/* ==========================================================================
   产品服务页
   ========================================================================== */
.prod-section + .prod-section { margin-top: 80px; }
.prod-hero-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.prod-hero-block .media {
  border-radius: var(--radius-lg);
  min-height: 300px;
  display: flex; align-items: center; justify-content: center;
}
.prod-hero-block .media svg { width: 130px; height: 130px; }
.prod-hero-block h2 { font-size: clamp(24px, 3.2vw, 32px); font-weight: 700; margin-bottom: 16px; }
.prod-hero-block p { color: var(--c-text-2); font-size: 15.5px; margin-bottom: 18px; }
.prod-hero-block ul { display: grid; gap: 12px; }
.prod-hero-block ul li { display: flex; gap: 10px; align-items: flex-start; font-size: 15px; color: var(--c-text-2); }
.prod-hero-block ul svg { width: 20px; height: 20px; color: var(--c-accent); flex-shrink: 0; margin-top: 2px; }

.chip-list { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 8px; }
.chip-list span {
  font-size: 13px;
  padding: 7px 16px;
  border-radius: 4px;
  background: var(--c-bg-soft);
  border: 1px solid var(--c-line);
  color: var(--c-text-2);
}

/* ==========================================================================
   联系我们页
   ========================================================================== */
.contact-wrap { display: grid; grid-template-columns: 1fr 1.15fr; gap: 48px; align-items: start; }
.contact-info { display: grid; gap: 18px; }
.contact-info__item {
  display: flex;
  gap: 16px;
  padding: 24px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  transition: var(--transition);
}
.contact-info__item:hover { border-color: var(--c-primary); }
.contact-info__item .ic {
  width: 48px; height: 48px;
  flex-shrink: 0;
  border-radius: 4px;
  display: flex; align-items: center; justify-content: center;
}
.contact-info__item .ic svg { width: 24px; height: 24px; }
.contact-info__item h4 { font-size: 15px; font-weight: 700; margin-bottom: 4px; }
.contact-info__item p { font-size: 14.5px; color: var(--c-text-2); }
.contact-info__item a { color: var(--c-primary); font-weight: 500; }

.contact-form {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  padding: 40px;
}
.contact-form h3 { font-size: 22px; font-weight: 700; margin-bottom: 8px; }
.contact-form > p { font-size: 14px; color: var(--c-text-2); margin-bottom: 26px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-field { margin-bottom: 18px; }
.form-field label { display: block; font-size: 13.5px; font-weight: 600; margin-bottom: 8px; color: var(--c-text); }
.form-field input, .form-field textarea, .form-field select {
  width: 100%;
  padding: 13px 16px;
  border: 1px solid var(--c-line);
  border-radius: 4px;
  font-size: 15px;
  color: var(--c-text);
  background: var(--c-bg-soft);
  transition: var(--transition);
  outline: none;
}
.form-field textarea { min-height: 120px; resize: vertical; }
.form-field input:focus, .form-field textarea:focus, .form-field select:focus {
  border-color: var(--c-primary);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(15, 76, 150, 0.08);
}
.form-field input::placeholder, .form-field textarea::placeholder { color: var(--c-text-3); }
.form-note { font-size: 12.5px; color: var(--c-text-3); margin-top: 4px; }
.form-status {
  display: none;
  margin-top: 18px;
  padding: 14px 18px;
  border-radius: 4px;
  font-size: 14px;
}
.form-status.is-show { display: block; }
.form-status.ok { background: var(--c-accent-soft); color: #146b55; }
.form-status.err { background: #fdeaea; color: #b03a3a; }

.map-holder {
  margin-top: 60px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--c-line);
  min-height: 320px;
  background:
    radial-gradient(600px 320px at 30% 30%, rgba(31,138,107,0.12), transparent 60%),
    linear-gradient(150deg, #f5f7fa, #e8eef5);
  display: flex; align-items: center; justify-content: center;
  position: relative;
}
.map-holder__pin {
  text-align: center;
  color: var(--c-text-2);
}
.map-holder__pin svg { width: 48px; height: 48px; color: var(--c-primary); margin: 0 auto 10px; }
.map-holder__pin p { font-size: 14px; }

/* ==========================================================================
   滚动进入动效
   ========================================================================== */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.55s ease, transform 0.55s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .hero__grid { grid-template-columns: 1fr; gap: 48px; }
  .hero__visual { max-width: 560px; }
  .about-intro { grid-template-columns: 1fr; }
  .prod-hero-block { grid-template-columns: 1fr; }
  .contact-wrap { grid-template-columns: 1fr; }
}

@media (max-width: 920px) {
  .hd-contact a:last-child { display: none; }
  .brand__name { font-size: 20px; letter-spacing: 1.5px; }
}

@media (max-width: 768px) {
  .section { padding: 68px 0; }
  .container { padding: 0 20px; }
  .nav { display: none; }
  .hd-contact { display: none; }
  .nav-toggle { display: flex; }
  .brand__name { font-size: 18px; letter-spacing: 1px; }
  .nav.is-open .nav__contact {
    display: flex;
    flex-direction: column;
    gap: 9px;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--c-line);
  }
  .nav.is-open .nav__contact a { font-size: 14px; color: var(--c-text-2); }
  .nav.is-open .nav__contact a:first-child { color: var(--c-primary); font-weight: 600; }

  /* 移动端抽屉菜单 */
  .nav.is-open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    background: #fff;
    padding: 18px 20px 28px;
    gap: 4px;
    border-bottom: 1px solid var(--c-line);
  }
  .nav.is-open .nav__link { padding: 14px 16px; font-size: 16px; }
  .nav.is-open .nav__link.is-active::after { display: none; }
  .nav.is-open .nav__link.is-active { background: var(--c-bg-soft); }

  .grid-3, .grid-2, .grid-4 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; gap: 34px; }
  .hero__stats { gap: 26px; flex-wrap: wrap; }
  .hero { min-height: auto; }
  .cta-band { flex-direction: column; align-items: flex-start; padding: 44px 30px; }
  .form-row { grid-template-columns: 1fr; }
  .contact-form { padding: 28px 22px; }
  .footer__bottom { flex-direction: column; text-align: center; }
  .trust-bar__inner { flex-direction: column; align-items: flex-start; }
  .timeline { padding-left: 32px; }
}

/* ==========================================================================
   商城风格 · 顶部信息条 / 头部搜索 / 主导航
   ========================================================================== */

.topbar {
  background: var(--c-bg-deep);
  color: rgba(255, 255, 255, 0.78);
  font-size: 13px;
}
.topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  height: 38px;
}
.topbar__list { display: flex; align-items: center; gap: 24px; }
.topbar__list li { display: flex; align-items: center; gap: 7px; white-space: nowrap; }
.topbar__list svg { width: 14px; height: 14px; stroke: rgba(255, 255, 255, 0.6); }
.topbar__right { display: flex; align-items: center; gap: 20px; white-space: nowrap; }
.topbar__tel { color: #fff; font-weight: 600; letter-spacing: 0.5px; }
.topbar a:hover { color: #fff; }

.hd {
  background: #fff;
  position: sticky;
  top: 0;
  z-index: 60;
  border-bottom: 1px solid var(--c-line);
}
.hd__main {
  display: flex;
  align-items: center;
  gap: 40px;
  padding: 20px 0;
}
.hd__main .brand { flex-shrink: 0; }

.hd__search { flex: 1; max-width: 620px; }
.search-box {
  display: flex;
  height: 46px;
  border: 1px solid var(--c-primary);
  border-radius: 4px;
  overflow: hidden;
  background: #fff;
}
.search-box input {
  flex: 1;
  border: none;
  outline: none;
  padding: 0 16px;
  font-size: 14px;
  color: var(--c-text);
  background: transparent;
}
.search-box input::placeholder { color: var(--c-text-3); }
.search-box button {
  width: 100px;
  background: var(--c-primary);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: background var(--transition);
}
.search-box button:hover { background: var(--c-primary-dark); }
.search-box button svg { width: 17px; height: 17px; }
.search-hot {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 9px;
  font-size: 12px;
  color: var(--c-text-3);
}
.search-hot a { color: var(--c-text-2); }
.search-hot a:hover { color: var(--c-primary); }

.hd__tel { display: flex; align-items: center; gap: 11px; flex-shrink: 0; }
.hd__tel .ico {
  width: 42px; height: 42px;
  border-radius: 4px;
  background: var(--c-primary-soft);
  color: var(--c-primary);
  display: flex; align-items: center; justify-content: center;
}
.hd__tel .ico svg { width: 20px; height: 20px; }
.hd__tel .label { font-size: 12px; color: var(--c-text-3); }
.hd__tel .num {
  font-size: 19px;
  font-weight: 700;
  color: var(--c-primary);
  line-height: 1.25;
  letter-spacing: 0.3px;
}

/* 主导航 */
.mainnav { background: var(--c-primary); }
.mainnav__inner { display: flex; align-items: center; }

.nav-dropdown { position: relative; }
.nav-cate {
  width: 226px;
  height: 52px;
  background: var(--c-primary-dark);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 0 20px;
  cursor: pointer;
}
.nav-cate svg { width: 18px; height: 18px; }

.mainnav__list { display: flex; align-items: center; }
.mainnav__link {
  display: block;
  padding: 0 24px;
  height: 52px;
  line-height: 52px;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.88);
  transition: background var(--transition);
}
.mainnav__link:hover { background: rgba(255, 255, 255, 0.13); color: #fff; }
.mainnav__link.is-active { background: rgba(255, 255, 255, 0.16); color: #fff; font-weight: 600; }
.mainnav__list .mainnav__link--cta {
  margin-left: auto;
  color: #fff;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 7px;
}
.mainnav__list .mainnav__link--cta svg { width: 16px; height: 16px; }

/* 产品目录下拉面板 */
.mega {
  position: absolute;
  left: 0;
  top: 100%;
  width: 940px;
  max-width: calc(100vw - 48px);
  background: #fff;
  border: 1px solid var(--c-line);
  border-top: 2px solid var(--c-primary);
  padding: 28px 30px;
  display: none;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  z-index: 80;
}
.nav-dropdown:hover .mega { display: grid; }
.mega__col h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--c-primary);
  padding-bottom: 9px;
  margin-bottom: 10px;
  border-bottom: 1px solid var(--c-line);
}
.mega__col li a {
  display: block;
  font-size: 13px;
  color: var(--c-text-2);
  padding: 5px 0;
  transition: color var(--transition), padding-left var(--transition);
}
.mega__col li a:hover { color: var(--c-primary); padding-left: 5px; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}
@media (prefers-reduced-motion: no-preference) {
  .nav-dropdown:hover .mega { animation: fadeUp 0.2s ease; }
}

/* ==========================================================================
   合作品牌页
   ========================================================================== */

.brand-tool {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  background: var(--c-primary-soft);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 18px 24px;
  margin-bottom: 32px;
}
.brand-tool__count { font-size: 14px; color: var(--c-text-2); }
.brand-tool__count b {
  color: var(--c-primary);
  font-size: 24px;
  font-weight: 700;
  margin: 0 5px;
  letter-spacing: -0.5px;
}
.brand-search { position: relative; width: 300px; height: 42px; }
.brand-search input {
  width: 100%;
  height: 100%;
  border: 1px solid var(--c-line);
  border-radius: 4px;
  padding: 0 44px 0 15px;
  font-size: 14px;
  color: var(--c-text);
  background: #fff;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.brand-search input::placeholder { color: var(--c-text-3); }
.brand-search input:focus {
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(15, 76, 150, 0.09);
}
.brand-search svg {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 17px;
  height: 17px;
  stroke: var(--c-text-3);
  pointer-events: none;
}

.brand-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 12px;
}
.brand-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 104px;
  padding: 15px 8px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: #fff;
  text-align: center;
  transition: var(--transition);
}
.brand-card:hover {
  border-color: var(--c-primary);
  background: var(--c-primary-softer);
}
.brand-card__badge {
  width: 34px;
  height: 34px;
  border-radius: 4px;
  background: var(--c-primary-soft);
  color: var(--c-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.3px;
  transition: var(--transition);
}
.brand-card:hover .brand-card__badge { background: var(--c-primary); color: #fff; }
.brand-card__logo {
  display: none;
  max-width: 100%;
  height: 36px;
  object-fit: contain;
}
.brand-card.has-logo .brand-card__logo { display: block; }
.brand-card.has-logo .brand-card__badge { display: none; }
.brand-card__name {
  font-size: 13px;
  line-height: 1.35;
  color: var(--c-text);
  word-break: break-word;
}
.brand-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 64px 0;
  color: var(--c-text-3);
  font-size: 15px;
}

@media (max-width: 1080px) { .brand-grid { grid-template-columns: repeat(5, 1fr); } }
@media (max-width: 900px) { .brand-grid { grid-template-columns: repeat(4, 1fr); } }
@media (max-width: 640px) {
  .brand-grid { grid-template-columns: repeat(3, 1fr); gap: 9px; }
  .brand-search { width: 100%; }
  .brand-card { min-height: 84px; padding: 12px 6px; }
  .brand-card__name { font-size: 12px; }
}

/* ==========================================================================
   定制合成页 · 问答
   ========================================================================== */

.faq { max-width: 880px; margin: 0 auto; }
.faq__item {
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: #fff;
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}
.faq__item:hover { border-color: var(--c-primary-light); }
.faq__q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  font-size: 15px;
  font-weight: 600;
  color: var(--c-text);
  text-align: left;
  transition: color var(--transition);
}
.faq__q:hover { color: var(--c-primary); }
.faq__q svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  stroke: var(--c-text-3);
  transition: transform var(--transition);
}
.faq__item.is-open .faq__q { color: var(--c-primary); }
.faq__item.is-open .faq__q svg { transform: rotate(180deg); stroke: var(--c-primary); }
.faq__a {
  display: none;
  padding: 0 22px 20px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-text-2);
}
.faq__item.is-open .faq__a { display: block; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation: none !important; }
}