/* ==========================================================================
   长沙向滢科技有限公司 · 官网样式表
   主色调：品牌蓝（取自公司 Logo）
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root {
  --navy: #05224a;
  --brand-900: #082d68;
  --brand-800: #0b4da2;
  --brand-700: #1466c8;
  --brand-600: #1e7fe0;
  --brand-500: #2e97f0;
  --brand-100: #dbeafe;
  --brand-50: #eef6ff;
  --cyan: #29b6e8;
  --cyan-soft: #7fdaf5;

  --ink: #0f2643;
  --text: #3b4d68;
  --muted: #6d7f99;
  --line: #e3ebf6;
  --bg-soft: #f4f8fe;
  --bg-deep: #06254f;
  --white: #ffffff;

  --radius-sm: 6px;
  --radius: 12px;
  --radius-lg: 18px;
  --shadow-sm: 0 2px 10px rgba(11, 77, 162, 0.06);
  --shadow: 0 10px 30px rgba(11, 77, 162, 0.1);
  --shadow-lg: 0 20px 50px rgba(8, 45, 104, 0.16);

  --container: 1240px;
  --header-h: 82px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 2. 基础重置 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  margin: 0;
  font-family: "Inter", "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5 {
  margin: 0;
  color: var(--ink);
  line-height: 1.28;
  font-weight: 700;
  letter-spacing: -0.01em;
}

p { margin: 0; }
a { color: inherit; text-decoration: none; transition: color 0.25s var(--ease); }
img { max-width: 100%; display: block; border: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button { font: inherit; cursor: pointer; border: 0; background: none; color: inherit; }
input, textarea, select { font: inherit; color: inherit; }
svg { display: block; }

::selection { background: var(--brand-800); color: #fff; }

:focus-visible {
  outline: 3px solid rgba(30, 127, 224, 0.45);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ---------- 3. 布局工具 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: 96px 0; }
.section--soft { background: var(--bg-soft); }
.section--tight { padding: 72px 0; }
.section--deep {
  background: linear-gradient(135deg, #05224a 0%, #0b4da2 60%, #1160b8 100%);
  color: rgba(255, 255, 255, 0.86);
}
.section--deep h2,
.section--deep h3 { color: #fff; }

.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.text-center { text-align: center; }

/* ---------- 4. 区块标题 ---------- */
.sec-head { max-width: 780px; margin: 0 auto 52px; text-align: center; }
.sec-head--left { margin-left: 0; text-align: left; }

.sec-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--brand-700);
  background: var(--brand-50);
  border: 1px solid var(--brand-100);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 18px;
}
.sec-eyebrow::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--brand-600);
  box-shadow: 0 0 0 4px rgba(30, 127, 224, 0.15);
}
.section--deep .sec-eyebrow {
  color: var(--cyan-soft);
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.18);
}
.section--deep .sec-eyebrow::before { background: var(--cyan-soft); box-shadow: 0 0 0 4px rgba(127, 218, 245, 0.18); }

.sec-title { font-size: clamp(26px, 3.2vw, 40px); }
.sec-sub { margin-top: 16px; font-size: 16px; color: var(--muted); }
.section--deep .sec-sub { color: rgba(255, 255, 255, 0.72); }

.title-bar {
  width: 56px; height: 4px;
  border-radius: 4px;
  margin: 20px auto 0;
  background: linear-gradient(90deg, var(--brand-800), var(--cyan));
}
.sec-head--left .title-bar { margin-left: 0; }

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
  transition: all 0.28s var(--ease);
  border: 1px solid transparent;
  cursor: pointer;
}
.btn svg { width: 16px; height: 16px; flex: none; }

.btn--primary {
  background: linear-gradient(135deg, var(--brand-700), var(--brand-500));
  color: #fff;
  box-shadow: 0 10px 24px rgba(20, 102, 200, 0.32);
}
.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 32px rgba(20, 102, 200, 0.4);
  color: #fff;
}

.btn--ghost {
  border-color: rgba(255, 255, 255, 0.42);
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(6px);
}
.btn--ghost:hover { background: #fff; color: var(--brand-800); border-color: #fff; }

.btn--outline {
  border-color: var(--brand-100);
  color: var(--brand-800);
  background: #fff;
}
.btn--outline:hover {
  border-color: var(--brand-600);
  color: var(--brand-700);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

.btn--sm { padding: 10px 20px; font-size: 14px; }
.btn--block { width: 100%; }

.link-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  font-weight: 600;
  color: var(--brand-700);
}
.link-more svg { width: 15px; height: 15px; transition: transform 0.28s var(--ease); }
.link-more:hover svg { transform: translateX(4px); }

/* ---------- 6. 顶部信息条 ---------- */
.topbar {
  background: var(--bg-deep);
  color: rgba(255, 255, 255, 0.74);
  font-size: 13px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 42px;
}
.topbar__list { display: flex; align-items: center; gap: 22px; flex-wrap: wrap; }
.topbar__list li { display: inline-flex; align-items: center; gap: 7px; }
.topbar__list svg { width: 14px; height: 14px; color: var(--cyan-soft); flex: none; }
.topbar a:hover { color: #fff; }
.topbar__tag { color: var(--cyan-soft); font-weight: 600; letter-spacing: 0.04em; }

/* ---------- 7. 页头导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow 0.3s var(--ease);
}
.site-header.is-scrolled { box-shadow: 0 8px 26px rgba(11, 77, 162, 0.1); }

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  min-height: var(--header-h);
}

/* Logo 展示位 */
.brand { display: flex; align-items: center; gap: 14px; flex: none; }
.brand__mark {
  width: 72px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: #fff;
  overflow: hidden;
  flex: none;
}
.brand__mark img { width: 100%; height: 100%; object-fit: contain; }
.brand__mark--solo { background: transparent; }
.brand__text { display: flex; flex-direction: column; line-height: 1.2; }
.brand__name {
  font-size: 19px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.02em;
}
.brand__en {
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
}
.brand__divider {
  width: 1px;
  height: 30px;
  background: var(--line);
  flex: none;
}

.nav { display: flex; align-items: center; gap: 4px; }
.nav__link {
  position: relative;
  display: block;
  padding: 10px 15px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  border-radius: 8px;
  white-space: nowrap;
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 15px; right: 15px; bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--brand-700), var(--cyan));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.28s var(--ease);
}
.nav__link:hover { color: var(--brand-800); }
.nav__link:hover::after,
.nav__link.is-active::after { transform: scaleX(1); }
.nav__link.is-active { color: var(--brand-800); }

.header__cta { display: flex; align-items: center; gap: 12px; flex: none; }

.burger {
  display: none;
  width: 44px; height: 44px;
  border-radius: 10px;
  border: 1px solid var(--line);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  background: #fff;
}
.burger span {
  display: block;
  width: 20px; height: 2px;
  border-radius: 2px;
  background: var(--ink);
  transition: transform 0.3s var(--ease), opacity 0.2s;
}
.burger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.is-open span:nth-child(2) { opacity: 0; }
.burger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 移动端抽屉 */
.drawer {
  position: fixed;
  inset: 0 0 0 auto;
  width: min(360px, 86vw);
  background: #fff;
  z-index: 120;
  transform: translateX(102%);
  transition: transform 0.36s var(--ease);
  display: flex;
  flex-direction: column;
  box-shadow: -20px 0 50px rgba(8, 45, 104, 0.18);
}
.drawer.is-open { transform: translateX(0); }
.drawer__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  border-bottom: 1px solid var(--line);
}
.drawer__close {
  width: 38px; height: 38px;
  border-radius: 10px;
  border: 1px solid var(--line);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
  color: var(--muted);
}
.drawer__body { padding: 12px 12px 24px; overflow-y: auto; flex: 1; }
.drawer__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 15px 16px;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
}
.drawer__link:hover,
.drawer__link.is-active { background: var(--brand-50); color: var(--brand-800); }
.drawer__link svg { width: 16px; height: 16px; color: var(--brand-500); }
.drawer__foot { padding: 20px; border-top: 1px solid var(--line); display: grid; gap: 12px; }
.drawer__contact { font-size: 13px; color: var(--muted); display: grid; gap: 6px; }
.drawer__contact strong { color: var(--brand-800); font-size: 17px; }

.scrim {
  position: fixed;
  inset: 0;
  background: rgba(5, 34, 74, 0.5);
  backdrop-filter: blur(2px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s var(--ease), visibility 0.3s;
  z-index: 110;
}
.scrim.is-open { opacity: 1; visibility: visible; }

/* ---------- 8. 首页 Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(1100px 620px at 82% 8%, rgba(41, 182, 232, 0.28), transparent 62%),
    radial-gradient(760px 520px at 6% 92%, rgba(30, 127, 224, 0.26), transparent 66%),
    linear-gradient(140deg, #05224a 0%, #0a3d82 46%, #0f5cad 100%);
  color: rgba(255, 255, 255, 0.82);
}
.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.055) 1px, transparent 1px);
  background-size: 62px 62px;
  mask-image: radial-gradient(circle at 60% 30%, #000 30%, transparent 78%);
  -webkit-mask-image: radial-gradient(circle at 60% 30%, #000 30%, transparent 78%);
}
.hero__glow {
  position: absolute;
  width: 520px; height: 520px;
  right: -120px; top: -140px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(41, 182, 232, 0.42), transparent 68%);
  filter: blur(6px);
  animation: floaty 9s ease-in-out infinite;
}
@keyframes floaty {
  0%, 100% { transform: translate3d(0, 0, 0); }
  50% { transform: translate3d(-18px, 22px, 0); }
}
.hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 56px;
  align-items: center;
  padding: 92px 0 96px;
}
.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 16px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.08);
  font-size: 13px;
  color: #fff;
  letter-spacing: 0.04em;
  margin-bottom: 26px;
}
.hero__badge i {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--cyan-soft);
  box-shadow: 0 0 0 4px rgba(127, 218, 245, 0.22);
}
.hero h1 {
  font-size: clamp(30px, 4.1vw, 54px);
  color: #fff;
  line-height: 1.2;
  letter-spacing: -0.02em;
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(92deg, var(--cyan-soft), #ffffff 70%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero__lead {
  margin-top: 24px;
  font-size: 17px;
  max-width: 620px;
  color: rgba(255, 255, 255, 0.78);
}
.hero__points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin-top: 26px;
  font-size: 14.5px;
}
.hero__points li { display: inline-flex; align-items: center; gap: 8px; color: rgba(255, 255, 255, 0.86); }
.hero__points svg { width: 17px; height: 17px; color: var(--cyan-soft); flex: none; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 38px; }

.hero__panel {
  position: relative;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.07);
  backdrop-filter: blur(10px);
  padding: 26px;
  box-shadow: var(--shadow-lg);
}
.hero__panel h3 {
  color: #fff;
  font-size: 17px;
  margin-bottom: 6px;
}
.hero__panel p { font-size: 13.5px; color: rgba(255, 255, 255, 0.7); }
.hero__cats { display: grid; gap: 10px; margin-top: 18px; }
.hero__cat {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 13px 16px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #fff;
  transition: all 0.28s var(--ease);
}
.hero__cat:hover {
  background: rgba(255, 255, 255, 0.14);
  transform: translateX(4px);
  color: #fff;
}
.hero__cat-ico {
  width: 38px; height: 38px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, rgba(41, 182, 232, 0.32), rgba(30, 127, 224, 0.32));
  flex: none;
}
.hero__cat-ico svg { width: 20px; height: 20px; color: #fff; }
.hero__cat b { display: block; font-size: 15px; font-weight: 600; }
.hero__cat small { font-size: 12.5px; color: rgba(255, 255, 255, 0.66); }
.hero__cat > svg { width: 16px; height: 16px; margin-left: auto; color: rgba(255, 255, 255, 0.5); }

/* 数据条 */
.statbar {
  position: relative;
  background: linear-gradient(135deg, var(--brand-800), var(--brand-600));
  color: #fff;
}
.statbar__inner {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: rgba(255, 255, 255, 0.16);
}
.stat {
  background: linear-gradient(135deg, var(--brand-800), var(--brand-600));
  padding: 32px 24px;
  text-align: center;
}
.stat__num {
  font-size: clamp(26px, 3vw, 38px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #fff;
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
}
.stat__num span { font-size: 15px; font-weight: 600; color: var(--cyan-soft); }
.stat__label { font-size: 13.5px; color: rgba(255, 255, 255, 0.76); margin-top: 6px; }

/* ---------- 9. 卡片：产品分类 ---------- */
.cat-card {
  position: relative;
  display: block;
  padding: 34px 28px 30px;
  border-radius: var(--radius-lg);
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all 0.32s var(--ease);
}
.cat-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--brand-800), var(--cyan));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.36s var(--ease);
}
.cat-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  border-color: var(--brand-100);
}
.cat-card:hover::before { transform: scaleX(1); }
.cat-card__ico {
  width: 56px; height: 56px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--brand-50), #e3f0ff);
  border: 1px solid var(--brand-100);
  margin-bottom: 20px;
}
.cat-card__ico svg { width: 28px; height: 28px; color: var(--brand-700); }
.cat-card h3 { font-size: 19px; margin-bottom: 10px; }
.cat-card p { font-size: 14.5px; color: var(--muted); min-height: 52px; }
.cat-card__tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 18px; }
.cat-card__tags span {
  font-size: 12.5px;
  padding: 4px 10px;
  border-radius: 6px;
  background: var(--bg-soft);
  color: var(--brand-700);
  border: 1px solid var(--line);
}

/* ---------- 10. 产品卡 ---------- */
.prod-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 24px; }

.prod-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s var(--ease);
}
.prod-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  border-color: var(--brand-100);
}
.prod-card__media {
  position: relative;
  aspect-ratio: 4 / 3;
  background: linear-gradient(160deg, #f7fbff, #e8f2fe);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 22px;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.prod-card__media img { width: 100%; height: 100%; object-fit: contain; }
.prod-card__media::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 0;
  background: linear-gradient(180deg, transparent, rgba(11, 77, 162, 0.06));
}
.prod-card__cate {
  position: absolute;
  left: 14px; top: 14px;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--brand-700);
  border: 1px solid var(--brand-100);
  backdrop-filter: blur(4px);
}
.prod-card__body { padding: 20px 20px 22px; display: flex; flex-direction: column; flex: 1; }
.prod-card__body h3 { font-size: 17px; margin-bottom: 8px; }
.prod-card__body h3 a:hover { color: var(--brand-700); }
.prod-card__desc { font-size: 13.8px; color: var(--muted); flex: 1; }
.prod-card__spec { display: flex; flex-wrap: wrap; gap: 6px; margin: 14px 0 16px; }
.prod-card__spec span {
  font-size: 12px;
  color: var(--brand-700);
  background: var(--brand-50);
  padding: 3px 9px;
  border-radius: 5px;
}
.prod-card__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
}
.prod-card__model { font-size: 12.5px; color: var(--muted); letter-spacing: 0.04em; }
.prod-card__btn {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--brand-700);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.prod-card__btn svg { width: 14px; height: 14px; }
.prod-card__btn:hover { color: var(--brand-800); }

/* 产品筛选 */
.filterbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 44px;
}
.filter-btn {
  padding: 10px 22px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #fff;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--text);
  transition: all 0.26s var(--ease);
}
.filter-btn:hover { border-color: var(--brand-500); color: var(--brand-700); }
.filter-btn.is-active {
  background: linear-gradient(135deg, var(--brand-700), var(--brand-500));
  color: #fff;
  border-color: transparent;
  box-shadow: 0 8px 20px rgba(20, 102, 200, 0.26);
}

/* ---------- 11. 优势卡 ---------- */
.adv-card {
  display: flex;
  gap: 18px;
  padding: 28px 26px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--line);
  transition: all 0.3s var(--ease);
}
.adv-card:hover {
  border-color: var(--brand-100);
  box-shadow: var(--shadow);
  transform: translateY(-4px);
}
.adv-card__ico {
  width: 50px; height: 50px;
  flex: none;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--brand-700), var(--brand-500));
  box-shadow: 0 8px 18px rgba(20, 102, 200, 0.24);
}
.adv-card__ico svg { width: 24px; height: 24px; color: #fff; }
.adv-card h3 { font-size: 17px; margin-bottom: 8px; }
.adv-card p { font-size: 14.2px; color: var(--muted); }

/* ---------- 12. 应用行业 ---------- */
.ind-card {
  padding: 30px 24px;
  text-align: center;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.14);
  transition: all 0.3s var(--ease);
}
.ind-card:hover {
  background: rgba(255, 255, 255, 0.13);
  transform: translateY(-5px);
  border-color: rgba(127, 218, 245, 0.42);
}
.ind-card svg { width: 34px; height: 34px; margin: 0 auto 16px; color: var(--cyan-soft); }
.ind-card h3 { color: #fff; font-size: 16.5px; margin-bottom: 8px; }
.ind-card p { font-size: 13.5px; color: rgba(255, 255, 255, 0.68); }

/* ---------- 13. 图文分栏 ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.split--reverse .split__text { order: 2; }
.split__media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  background: linear-gradient(160deg, #f7fbff, #e6f1fe);
  padding: 30px;
}
.split__media img { margin: 0 auto; }
.split__title { font-size: clamp(24px, 2.8vw, 34px); }
.split__text p { margin-top: 18px; color: var(--muted); }
.checklist { display: grid; gap: 14px; margin-top: 26px; }
.checklist li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-size: 15px;
  color: var(--text);
}
.checklist svg {
  width: 20px; height: 20px;
  flex: none;
  color: var(--brand-600);
  margin-top: 3px;
}
.checklist b { color: var(--ink); }

/* ---------- 14. 资质证书 ---------- */
.cert-card {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: #fff;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s var(--ease);
}
.cert-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.cert-card__media {
  aspect-ratio: 5 / 7;
  background: #fbfdff;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.cert-card__media img { width: 100%; height: 100%; object-fit: cover; }
.cert-card__body { padding: 16px 18px 18px; }
.cert-card__body h3 { font-size: 15.5px; }
.cert-card__body p { font-size: 12.8px; color: var(--muted); margin-top: 5px; }

/* 参数表 */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  font-size: 14.5px;
}
.spec-table th,
.spec-table td {
  padding: 14px 20px;
  text-align: left;
  border-bottom: 1px solid var(--line);
}
.spec-table th {
  background: var(--bg-soft);
  color: var(--ink);
  font-weight: 600;
  white-space: nowrap;
  width: 190px;
}
.spec-table tr:last-child th,
.spec-table tr:last-child td { border-bottom: 0; }
.spec-table td { color: var(--text); }

/* ---------- 15. 案例卡 ---------- */
.case-card {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s var(--ease);
}
.case-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.case-card__media {
  aspect-ratio: 16 / 10;
  background: linear-gradient(150deg, #0b4da2, #1e7fe0 62%, #29b6e8);
  display: flex; align-items: center; justify-content: center;
  position: relative;
  overflow: hidden;
}
.case-card__media img { width: 100%; height: 100%; object-fit: cover; }
.case-card__tag {
  position: absolute;
  left: 16px; top: 16px;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 11px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--brand-800);
}
.case-card__body { padding: 22px 22px 24px; flex: 1; display: flex; flex-direction: column; }
.case-card__body h3 { font-size: 17px; margin-bottom: 10px; }
.case-card__body p { font-size: 14px; color: var(--muted); flex: 1; }
.case-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  font-size: 12.8px;
  color: var(--muted);
}
.case-card__meta span { display: inline-flex; align-items: center; gap: 5px; }
.case-card__meta svg { width: 14px; height: 14px; color: var(--brand-500); }

/* 客户 Logo 墙（占位） */
.logo-wall {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 16px;
}
.logo-slot {
  height: 92px;
  border-radius: var(--radius);
  border: 1px dashed #c6d8f0;
  background: #fff;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  color: #9db2cd;
  font-size: 12px;
  transition: all 0.28s var(--ease);
}
.logo-slot:hover { border-color: var(--brand-500); color: var(--brand-700); background: var(--brand-50); }
.logo-slot svg { width: 22px; height: 22px; }

/* ---------- 16. 新闻 ---------- */
.news-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s var(--ease);
}
.news-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.news-card__media {
  aspect-ratio: 16 / 9;
  background: linear-gradient(140deg, #0a3d82, #1e7fe0 58%, #29b6e8);
  overflow: hidden;
  position: relative;
}
.news-card__media img { width: 100%; height: 100%; object-fit: cover; }
.news-card__date {
  position: absolute;
  left: 16px; bottom: 16px;
  background: rgba(255, 255, 255, 0.94);
  color: var(--brand-800);
  border-radius: 8px;
  padding: 6px 12px;
  font-size: 12.5px;
  font-weight: 600;
  line-height: 1.2;
  text-align: center;
}
.news-card__body { padding: 22px; flex: 1; display: flex; flex-direction: column; }
.news-card__kicker {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--brand-600);
  text-transform: uppercase;
  margin-bottom: 10px;
}
.news-card__body h3 { font-size: 16.5px; line-height: 1.5; margin-bottom: 10px; }
.news-card__body h3 a:hover { color: var(--brand-700); }
.news-card__body p { font-size: 14px; color: var(--muted); flex: 1; }
.news-card__more { margin-top: 16px; font-size: 13.5px; color: var(--brand-700); font-weight: 600; display: inline-flex; align-items: center; gap: 5px; }
.news-card__more svg { width: 14px; height: 14px; }

/* 新闻列表项 */
.news-item {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 28px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
  align-items: center;
}
.news-item:first-child { padding-top: 0; }
.news-item__thumb {
  aspect-ratio: 16 / 10;
  border-radius: var(--radius);
  overflow: hidden;
  background: linear-gradient(140deg, #0a3d82, #29b6e8);
}
.news-item__thumb img { width: 100%; height: 100%; object-fit: cover; }
.news-item__date {
  font-size: 13px;
  color: var(--brand-600);
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
}
.news-item h3 { font-size: 19px; margin-bottom: 10px; }
.news-item h3 a:hover { color: var(--brand-700); }
.news-item p { font-size: 14.5px; color: var(--muted); }

/* ---------- 17. CTA 区 ---------- */
.cta-band {
  position: relative;
  overflow: hidden;
  background: linear-gradient(120deg, #06254f 0%, #0b4da2 55%, #1470cc 100%);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 54px 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}
.cta-band::after {
  content: "";
  position: absolute;
  width: 380px; height: 380px;
  right: -80px; top: -120px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(41, 182, 232, 0.42), transparent 68%);
}
.cta-band__text { position: relative; z-index: 1; max-width: 640px; }
.cta-band h2 { color: #fff; font-size: clamp(22px, 2.6vw, 32px); }
.cta-band p { margin-top: 12px; color: rgba(255, 255, 255, 0.76); font-size: 15.5px; }
.cta-band__actions { position: relative; z-index: 1; display: flex; flex-wrap: wrap; gap: 14px; }

/* ---------- 18. 页脚 ---------- */
.site-footer {
  background: #04203f;
  color: rgba(255, 255, 255, 0.62);
  font-size: 14px;
  padding-top: 72px;
}
.footer__top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
  gap: 48px;
  padding-bottom: 56px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.footer__brand { display: flex; align-items: center; gap: 14px; margin-bottom: 20px; }
.footer__brand .brand__mark { background: #fff; }
.footer__brand-name { color: #fff; font-size: 18px; font-weight: 700; line-height: 1.3; }
.footer__brand-en { font-size: 10px; letter-spacing: 0.13em; color: rgba(255, 255, 255, 0.48); text-transform: uppercase; }
.footer__desc { line-height: 1.9; }
.footer__title {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 12px;
}
.footer__title::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 30px; height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--brand-500), var(--cyan));
}
.footer__links { display: grid; gap: 12px; }
.footer__links a:hover { color: #fff; padding-left: 4px; }
.footer__links a { transition: all 0.24s var(--ease); }
.footer__contact { display: grid; gap: 14px; }
.footer__contact li { display: flex; gap: 11px; align-items: flex-start; line-height: 1.7; }
.footer__contact svg { width: 17px; height: 17px; color: var(--cyan-soft); flex: none; margin-top: 4px; }
.footer__contact b { color: #fff; font-size: 17px; letter-spacing: 0.02em; }
.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  padding: 24px 0;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
}
.footer__bottom a:hover { color: #fff; }
.footer__links-inline { display: flex; gap: 18px; flex-wrap: wrap; }

/* ---------- 19. 内页 Hero ---------- */
.page-hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(760px 420px at 88% 0%, rgba(41, 182, 232, 0.3), transparent 64%),
    linear-gradient(135deg, #05224a, #0a3d82 58%, #1262b8);
  color: #fff;
  padding: 74px 0 78px;
}
.page-hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(90deg, #000, transparent 82%);
  -webkit-mask-image: linear-gradient(90deg, #000, transparent 82%);
}
.page-hero__inner { position: relative; }
.page-hero h1 { color: #fff; font-size: clamp(27px, 3.4vw, 42px); }
.page-hero p { margin-top: 16px; max-width: 720px; color: rgba(255, 255, 255, 0.76); font-size: 16px; }
.page-hero__en {
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--cyan-soft);
  font-weight: 600;
  margin-bottom: 14px;
}
.breadcrumb {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 26px;
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.6);
}
.breadcrumb a:hover { color: #fff; }
.breadcrumb svg { width: 12px; height: 12px; opacity: 0.6; }

/* 锚点子导航 */
.subnav {
  border-bottom: 1px solid var(--line);
  background: #fff;
  position: sticky;
  top: var(--header-h);
  z-index: 60;
}
.subnav__inner { display: flex; gap: 6px; overflow-x: auto; padding: 10px 0; }
.subnav a {
  padding: 9px 18px;
  border-radius: 999px;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
}
.subnav a:hover { background: var(--brand-50); color: var(--brand-800); }
.subnav a.is-active { background: var(--brand-800); color: #fff; }

/* ---------- 20. 时间轴 / 流程 ---------- */
.timeline { position: relative; padding-left: 34px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 9px; top: 6px; bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--brand-700), var(--cyan), transparent);
}
.timeline__item { position: relative; padding-bottom: 34px; }
.timeline__item:last-child { padding-bottom: 0; }
.timeline__item::before {
  content: "";
  position: absolute;
  left: -33px; top: 6px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--brand-600);
  box-shadow: 0 0 0 4px rgba(30, 127, 224, 0.14);
}
.timeline__year {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--brand-600);
  margin-bottom: 6px;
}
.timeline__item h3 { font-size: 17px; margin-bottom: 8px; }
.timeline__item p { font-size: 14.3px; color: var(--muted); }

/* 服务流程 */
.flow { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 18px; }
.flow__step {
  position: relative;
  padding: 30px 22px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-align: center;
}
.flow__step::after {
  content: "";
  position: absolute;
  right: -12px; top: 50%;
  width: 24px; height: 2px;
  background: var(--brand-100);
}
.flow__step:last-child::after { display: none; }
.flow__no {
  width: 46px; height: 46px;
  margin: 0 auto 16px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 17px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--brand-700), var(--brand-500));
  box-shadow: 0 8px 18px rgba(20, 102, 200, 0.26);
}
.flow__step h3 { font-size: 16px; margin-bottom: 8px; }
.flow__step p { font-size: 13.5px; color: var(--muted); }

/* ---------- 21. 表单 ---------- */
.form-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow);
}
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.field { display: grid; gap: 8px; }
.field--full { grid-column: 1 / -1; }
.field label { font-size: 14px; font-weight: 600; color: var(--ink); }
.field label span { color: #e0453a; }
.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 13px 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fbfdff;
  font-size: 15px;
  transition: all 0.22s var(--ease);
}
.field textarea { resize: vertical; min-height: 132px; }
.field input::placeholder,
.field textarea::placeholder { color: #a8b8cd; }
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--brand-500);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(46, 151, 240, 0.12);
}
.field__hint { font-size: 12.5px; color: var(--muted); }
.field__error { font-size: 12.5px; color: #e0453a; display: none; }
.field.has-error input,
.field.has-error textarea { border-color: #e0453a; background: #fff7f6; }
.field.has-error .field__error { display: block; }

.checkbox {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 13.5px;
  color: var(--muted);
}
.checkbox input { width: auto; margin-top: 3px; }

.form-note {
  margin-top: 18px;
  padding: 14px 16px;
  border-radius: 10px;
  background: var(--brand-50);
  border: 1px solid var(--brand-100);
  font-size: 13.2px;
  color: var(--brand-800);
  display: none;
}
.form-note.is-visible { display: block; }

/* ---------- 22. 联系信息卡 ---------- */
.contact-card {
  display: flex;
  gap: 18px;
  padding: 26px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: #fff;
  transition: all 0.3s var(--ease);
}
.contact-card:hover { border-color: var(--brand-100); box-shadow: var(--shadow); transform: translateY(-4px); }
.contact-card__ico {
  width: 50px; height: 50px;
  flex: none;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--brand-50), #e2efff);
  border: 1px solid var(--brand-100);
}
.contact-card__ico svg { width: 23px; height: 23px; color: var(--brand-700); }
.contact-card h3 { font-size: 16px; margin-bottom: 6px; }
.contact-card p { font-size: 14.5px; color: var(--muted); }
.contact-card b { color: var(--brand-800); font-size: 17px; display: block; margin-bottom: 2px; }

/* 地图占位 */
.map-slot {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  min-height: 380px;
  background:
    linear-gradient(rgba(226, 236, 249, 0.85) 1px, transparent 1px) 0 0 / 44px 44px,
    linear-gradient(90deg, rgba(226, 236, 249, 0.85) 1px, transparent 1px) 0 0 / 44px 44px,
    linear-gradient(150deg, #f4f9ff, #e7f1fe);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 30px;
}
.map-slot__pin {
  width: 54px; height: 54px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-700), var(--brand-500));
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 10px 24px rgba(20, 102, 200, 0.32);
  animation: pulse 2.4s ease-in-out infinite;
}
.map-slot__pin svg { width: 26px; height: 26px; color: #fff; }
@keyframes pulse {
  0%, 100% { transform: translateY(0); box-shadow: 0 10px 24px rgba(20, 102, 200, 0.32); }
  50% { transform: translateY(-6px); box-shadow: 0 16px 30px rgba(20, 102, 200, 0.4); }
}
.map-slot h3 { font-size: 18px; margin-bottom: 8px; }
.map-slot p { color: var(--muted); font-size: 14.5px; max-width: 460px; margin: 0 auto; }
.map-slot code {
  display: inline-block;
  margin-top: 14px;
  font-size: 12.5px;
  color: #8fa3bd;
  background: rgba(255, 255, 255, 0.7);
  border: 1px dashed #c3d7f0;
  border-radius: 6px;
  padding: 5px 12px;
}

/* ---------- 23. 弹窗（产品询价） ---------- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(5, 34, 74, 0.55);
  backdrop-filter: blur(3px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.28s var(--ease), visibility 0.28s;
}
.modal.is-open { opacity: 1; visibility: visible; }
.modal__box {
  width: min(680px, 100%);
  max-height: 88vh;
  overflow-y: auto;
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  transform: translateY(18px) scale(0.98);
  transition: transform 0.3s var(--ease);
}
.modal.is-open .modal__box { transform: translateY(0) scale(1); }
.modal__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 24px 28px;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: #fff;
  z-index: 2;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}
.modal__head h3 { font-size: 19px; }
.modal__head p { font-size: 13px; color: var(--muted); margin-top: 4px; }
.modal__close {
  width: 38px; height: 38px;
  border-radius: 10px;
  border: 1px solid var(--line);
  font-size: 20px;
  color: var(--muted);
  flex: none;
  display: flex; align-items: center; justify-content: center;
}
.modal__close:hover { background: var(--bg-soft); color: var(--ink); }
.modal__body { padding: 28px; }

/* ---------- 24. 滚动动效 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
  will-change: opacity, transform;
}
.reveal.is-in { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: 0.08s; }
.reveal[data-delay="2"] { transition-delay: 0.16s; }
.reveal[data-delay="3"] { transition-delay: 0.24s; }
.reveal[data-delay="4"] { transition-delay: 0.32s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero__glow, .map-slot__pin { animation: none; }
}

/* 回到顶部 */
.totop {
  position: fixed;
  right: 24px;
  bottom: 28px;
  width: 46px; height: 46px;
  border-radius: 12px;
  background: var(--brand-800);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 10px 26px rgba(11, 77, 162, 0.34);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all 0.3s var(--ease);
  z-index: 80;
}
.totop.is-visible { opacity: 1; visibility: visible; transform: none; }
.totop:hover { background: var(--brand-700); }
.totop svg { width: 20px; height: 20px; }

/* ---------- 25. 响应式 ---------- */
@media (max-width: 1180px) {
  .nav__link { padding: 10px 11px; font-size: 14.5px; }
  .brand__en { display: none; }
  .prod-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .logo-wall { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .flow { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .flow__step::after { display: none; }
}

@media (max-width: 1024px) {
  .nav, .header__cta .btn { display: none; }
  .burger { display: flex; }
  .hero__inner { grid-template-columns: 1fr; gap: 44px; padding: 72px 0 78px; }
  .hero__panel { max-width: 620px; }
  .split { grid-template-columns: 1fr; gap: 40px; }
  .split--reverse .split__text { order: 0; }
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__top { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 36px; }
  .statbar__inner { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cta-band { padding: 42px 36px; }
  .subnav { top: 0; }
}

@media (max-width: 860px) {
  .topbar__tag { display: none; }
  .prod-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .section { padding: 72px 0; }
  .logo-wall { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .form-card { padding: 28px; }
  .news-item { grid-template-columns: 1fr; gap: 18px; }
}

@media (max-width: 720px) {
  :root { --header-h: 68px; }
  .container { padding: 0 18px; }
  .topbar__inner { justify-content: center; }
  .topbar__list li:nth-child(3) { display: none; }
  .brand__mark { width: 58px; height: 42px; }
  .brand__name { font-size: 16px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .prod-grid { grid-template-columns: 1fr; gap: 18px; }
  .logo-wall { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .statbar__inner { grid-template-columns: 1fr; }
  .footer__top { grid-template-columns: 1fr; gap: 32px; }
  .form-grid { grid-template-columns: 1fr; }
  .flow { grid-template-columns: 1fr; }
  .cta-band { padding: 34px 24px; flex-direction: column; align-items: flex-start; }
  .cta-band__actions { width: 100%; }
  .cta-band__actions .btn { flex: 1; }
  .hero__actions .btn { flex: 1; }
  .spec-table th { width: 118px; padding: 12px 14px; }
  .spec-table th, .spec-table td { padding: 12px 14px; font-size: 13.5px; }
  .section { padding: 60px 0; }
  .sec-head { margin-bottom: 38px; }
  .totop { right: 14px; bottom: 16px; }
  .modal__head, .modal__body { padding: 20px; }
  .adv-card { padding: 22px 20px; }
  .footer__bottom { flex-direction: column; align-items: flex-start; gap: 10px; }
}

/* ---------- 26. 可展开内容（新闻全文 / 常见问题） ---------- */
details.expand { margin-top: 14px; }

details.expand > summary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--brand-700);
  cursor: pointer;
  list-style: none;
  user-select: none;
}
details.expand > summary::-webkit-details-marker { display: none; }
details.expand > summary::after {
  content: "+";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--brand-50);
  border: 1px solid var(--brand-100);
  font-size: 13px;
  line-height: 1;
  color: var(--brand-700);
}
details.expand[open] > summary::after { content: "–"; }
details.expand > summary:hover { color: var(--brand-800); }

details.expand .expand__body {
  margin-top: 16px;
  padding: 22px 24px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-left: 3px solid var(--brand-600);
  border-radius: 10px;
  font-size: 14.6px;
  color: var(--text);
}
details.expand .expand__body p + p,
details.expand .expand__body ul + p { margin-top: 14px; }
details.expand .expand__body h4 {
  font-size: 15.5px;
  margin: 18px 0 8px;
}
details.expand .expand__body h4:first-child { margin-top: 0; }
details.expand .expand__body ul { display: grid; gap: 8px; margin-top: 10px; }
details.expand .expand__body li {
  position: relative;
  padding-left: 18px;
}
details.expand .expand__body li::before {
  content: "";
  position: absolute;
  left: 4px; top: 11px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--brand-500);
}

.faq-list { display: grid; gap: 22px; }
.faq-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px 26px;
}
.faq-item > h3 { font-size: 16.5px; }
.faq-item p { font-size: 14.5px; color: var(--muted); margin-top: 10px; }

/* ---------- 27. 打印 ---------- */
@media print {
  .site-header, .topbar, .totop, .cta-band, .drawer, .scrim { display: none !important; }
  .hero, .page-hero { background: #0b4da2 !important; -webkit-print-color-adjust: exact; }
  .reveal { opacity: 1 !important; transform: none !important; }
  details.expand > .expand__body { display: block !important; }
}

/* ---------- 28. 产品详情页 ---------- */
.pdetail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.pdetail__media {
  background: linear-gradient(160deg, #f7fbff, #e8f2fe);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.pdetail__media img { width: 100%; height: auto; max-height: 420px; object-fit: contain; }
.pdetail__cat {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--brand-700);
  background: var(--brand-50);
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 14px;
}
.pdetail__info h2 { font-size: 27px; letter-spacing: -0.01em; }
.pdetail__model {
  font-size: 13.5px;
  color: var(--muted);
  letter-spacing: 0.04em;
  margin-top: 8px;
  padding-bottom: 16px;
  border-bottom: 1px dashed var(--line);
}
.pdetail__desc { font-size: 15px; color: var(--text); margin-top: 16px; }
.pdetail__specs { display: flex; flex-wrap: wrap; gap: 8px; margin: 20px 0 24px; }
.pdetail__specs span {
  font-size: 13px;
  font-weight: 600;
  color: var(--brand-700);
  background: var(--brand-50);
  border: 1px solid var(--brand-100);
  padding: 6px 12px;
  border-radius: 7px;
}
.pdetail__acts { display: flex; flex-wrap: wrap; gap: 12px; }
.pdetail__notes { margin-top: 26px; border-top: 1px dashed var(--line); padding-top: 18px; }
.pdetail__notes li {
  position: relative;
  padding-left: 18px;
  font-size: 13.5px;
  color: var(--muted);
  margin-bottom: 7px;
}
.pdetail__notes li::before {
  content: "";
  position: absolute;
  left: 3px; top: 9px;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--brand-400, var(--brand-500));
}
.prose { max-width: 880px; }
.prose h4 { font-size: 17px; margin: 26px 0 8px; }
.prose p { font-size: 15px; color: var(--muted); margin-bottom: 12px; }
.prose ul { margin: 10px 0 16px 22px; }
.prose li { font-size: 14.6px; color: var(--muted); margin-bottom: 6px; }

/* 产品卡片：详细参数入口 */
.prod-card__acts { display: inline-flex; align-items: center; gap: 14px; }
.prod-card__detail {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--muted);
  border-bottom: 1px dashed var(--line);
  padding-bottom: 2px;
  transition: color 0.2s, border-color 0.2s;
}
.prod-card__detail:hover { color: var(--brand-700); border-color: var(--brand-200, var(--brand-100)); }
a.prod-card__media { text-decoration: none; }

@media (max-width: 1024px) {
  .pdetail { grid-template-columns: 1fr; gap: 30px; }
}
@media (max-width: 520px) {
  .prod-card__acts { gap: 10px; }
  .prod-card__detail { font-size: 12.8px; }
  .pdetail__info h2 { font-size: 23px; }
}