/* =========================================================
   济南金盾电子科技有限公司 · 官网样式表
   设计基调：深空蓝（工业/可信）+ 安全橙（警示/活力）
   ========================================================= */

/* ---------- 设计变量 ---------- */
:root {
  --navy-950: #05101a;
  --navy-900: #07182a;
  --navy-800: #0b2338;
  --navy-700: #103049;

  --ink: #0a1a29;
  --slate: #41586d;
  --muted: #6a8095;

  --line: #e4eaf1;
  --bg: #f5f8fb;

  --brand: #ff6a13;
  --brand-2: #ff9147;
  --brand-dark: #e4570a;
  --cyan: #31b9ec;
  --green: #12b76a;

  --radius: 18px;
  --radius-sm: 12px;

  --shadow-sm: 0 2px 8px rgba(9, 30, 50, 0.06);
  --shadow-md: 0 14px 36px rgba(9, 30, 50, 0.1);
  --shadow-lg: 0 30px 70px rgba(5, 20, 35, 0.22);

  --container: 1200px;
  --header-h: 76px;
  --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%;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  margin: 0;
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei",
    "Source Han Sans SC", "Noto Sans SC", system-ui, -apple-system, "Segoe UI",
    Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  background: #fff;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

p {
  margin: 0;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

a {
  color: inherit;
  text-decoration: none;
}

img,
svg {
  display: block;
  max-width: 100%;
}

button {
  font: inherit;
  color: inherit;
}

table {
  border-collapse: collapse;
}

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

:focus-visible {
  outline: 3px solid rgba(255, 106, 19, 0.45);
  outline-offset: 3px;
  border-radius: 6px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 999;
  padding: 12px 20px;
  border-radius: 10px;
  background: var(--brand);
  color: #fff;
  font-weight: 700;
  transition: top 0.25s;
}
.skip-link:focus {
  top: 16px;
}

.container {
  width: min(100% - 48px, var(--container));
  margin-inline: auto;
}

@media (max-width: 640px) {
  .container {
    width: min(100% - 36px, var(--container));
  }
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 15px 28px;
  border: 1px solid transparent;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease),
    background 0.25s var(--ease), color 0.25s var(--ease),
    border-color 0.25s var(--ease);
}

.btn .ico {
  width: 18px;
  height: 18px;
  flex: none;
  transition: transform 0.25s var(--ease);
}
.btn:hover .ico {
  transform: translateX(3px);
}

.btn-primary {
  background: linear-gradient(135deg, #ff7d2b, #f25a05);
  color: #fff;
  box-shadow: 0 10px 24px rgba(255, 106, 19, 0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 34px rgba(255, 106, 19, 0.4);
}

.btn-ghost {
  border-color: rgba(255, 255, 255, 0.26);
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  backdrop-filter: blur(6px);
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.5);
}

.btn-outline {
  border-color: var(--line);
  background: #fff;
  color: var(--ink);
}
.btn-outline:hover {
  border-color: var(--brand);
  color: var(--brand-dark);
  box-shadow: var(--shadow-sm);
}

.btn-sm {
  padding: 12px 20px;
  font-size: 14px;
}

.btn-block {
  width: 100%;
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14.5px;
  font-weight: 700;
  color: var(--brand-dark);
}
.link-arrow svg {
  width: 16px;
  height: 16px;
  transition: transform 0.25s var(--ease);
}
.link-arrow:hover svg {
  transform: translateX(4px);
}

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  transition: background 0.35s var(--ease), box-shadow 0.35s var(--ease),
    backdrop-filter 0.35s var(--ease);
}

.site-header::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 1px;
  background: rgba(255, 255, 255, 0.1);
  transition: opacity 0.3s;
}

.site-header.is-stuck {
  background: rgba(255, 255, 255, 0.94);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  box-shadow: 0 10px 30px rgba(9, 30, 50, 0.08);
}
.site-header.is-stuck::after {
  opacity: 0;
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: var(--header-h);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #fff;
  flex: none;
}
.brand-mark {
  width: 44px;
  height: 44px;
  filter: drop-shadow(0 6px 14px rgba(255, 106, 19, 0.32));
}
.brand-text strong {
  display: block;
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0.08em;
  line-height: 1.2;
}
.brand-text small {
  display: block;
  margin-top: 1px;
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: rgba(255, 255, 255, 0.55);
  white-space: nowrap;
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.nav-link {
  position: relative;
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.76);
  transition: color 0.2s, background 0.2s;
  white-space: nowrap;
}
.nav-link:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.07);
}
.nav-link.is-active {
  color: #fff;
}
.nav-link.is-active::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--brand), var(--brand-2));
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 20px;
  flex: none;
}

.header-phone {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
}
.header-phone .ico {
  width: 20px;
  height: 20px;
  color: var(--brand-2);
  flex: none;
}
.header-phone small {
  display: block;
  font-size: 11px;
  color: rgba(255, 255, 255, 0.55);
  line-height: 1.2;
  letter-spacing: 0.04em;
}
.header-phone strong {
  display: block;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 0.02em;
  line-height: 1.3;
}

.site-header.is-stuck .brand {
  color: var(--ink);
}
.site-header.is-stuck .brand-text small {
  color: var(--muted);
}
.site-header.is-stuck .nav-link {
  color: var(--slate);
}
.site-header.is-stuck .nav-link:hover,
.site-header.is-stuck .nav-link.is-active {
  color: var(--ink);
  background: rgba(10, 26, 41, 0.04);
}
.site-header.is-stuck .header-phone {
  color: var(--ink);
}
.site-header.is-stuck .header-phone small {
  color: var(--muted);
}

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.06);
  cursor: pointer;
  place-items: center;
}
.nav-toggle span {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: #fff;
  transition: transform 0.3s var(--ease), background 0.3s;
}
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: #fff;
  transition: transform 0.3s var(--ease), top 0.3s var(--ease);
}
.nav-toggle span::before {
  top: -6px;
}
.nav-toggle span::after {
  top: 6px;
}
.site-header.is-stuck .nav-toggle {
  border-color: var(--line);
  background: #fff;
}
.site-header.is-stuck .nav-toggle span,
.site-header.is-stuck .nav-toggle span::before,
.site-header.is-stuck .nav-toggle span::after {
  background: var(--ink);
}
body.nav-open .nav-toggle span {
  background: transparent;
}
body.nav-open .nav-toggle span::before {
  top: 0;
  transform: rotate(45deg);
}
body.nav-open .nav-toggle span::after {
  top: 0;
  transform: rotate(-45deg);
}

/* 移动端抽屉 */
.nav-drawer {
  position: fixed;
  inset: var(--header-h) 0 0;
  z-index: 95;
  display: none;
  flex-direction: column;
  gap: 6px;
  padding: 24px;
  background: rgba(7, 24, 42, 0.98);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease),
    visibility 0.3s;
  overflow-y: auto;
}
body.nav-open .nav-drawer {
  opacity: 1;
  visibility: visible;
  transform: none;
}
.nav-drawer a {
  padding: 16px 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 18px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.9);
}
.nav-drawer a.is-active {
  color: var(--brand-2);
}
.nav-drawer .btn {
  margin-top: 20px;
}
.nav-drawer .drawer-meta {
  margin-top: auto;
  padding-top: 28px;
  font-size: 13px;
  line-height: 2;
  color: rgba(255, 255, 255, 0.5);
}

/* ---------- 首页 Hero ---------- */
.hero {
  position: relative;
  padding-top: var(--header-h);
  overflow: hidden;
  background: var(--navy-950);
  color: #fff;
  isolation: isolate;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(900px 620px at 76% 18%, rgba(255, 106, 19, 0.2), transparent 62%),
    radial-gradient(720px 560px at 8% 88%, rgba(49, 185, 236, 0.16), transparent 64%),
    linear-gradient(180deg, #061423, #05101a 70%);
}

.hero-grid {
  position: absolute;
  inset: 0;
  z-index: -1;
  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: 72px 72px;
  -webkit-mask-image: radial-gradient(ellipse 85% 75% at 50% 35%, #000 25%, transparent 78%);
  mask-image: radial-gradient(ellipse 85% 75% at 50% 35%, #000 25%, transparent 78%);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.06fr 0.94fr;
  align-items: center;
  gap: 48px;
  min-height: min(720px, calc(100vh - var(--header-h)));
  padding: 72px 0 64px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px 8px 10px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.8);
}
.hero-tag .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 4px rgba(18, 183, 106, 0.18);
}

.hero-kicker {
  margin: 24px 0 0;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: rgba(255, 255, 255, 0.7);
}

.hero h1 {
  margin-top: 12px;
  font-size: clamp(38px, 4.4vw, 62px);
  line-height: 1.12;
  letter-spacing: -0.03em;
}
.hero h1 .hl {
  background: linear-gradient(100deg, #ffc08f 0%, #ff8a3d 45%, #ff6a13 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lead {
  max-width: 560px;
  margin-top: 24px;
  font-size: 17px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.68);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}

.hero-certs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin-top: 38px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}
.hero-certs span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}
.hero-certs svg {
  width: 15px;
  height: 15px;
  color: var(--brand-2);
  flex: none;
}

/* Hero 右侧产品视觉 */
.hero-visual {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 460px;
}

.hero-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.09);
  pointer-events: none;
}
.hero-ring.r1 {
  width: 440px;
  height: 440px;
  background: radial-gradient(circle, rgba(255, 106, 19, 0.12), transparent 68%);
}
.hero-ring.r2 {
  width: 560px;
  height: 560px;
  border-style: dashed;
  border-color: rgba(255, 255, 255, 0.07);
  animation: spin 40s linear infinite;
}
.hero-ring.r3 {
  width: 330px;
  height: 330px;
  border-color: rgba(49, 185, 236, 0.16);
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.hero-product {
  position: relative;
  z-index: 2;
  width: min(430px, 88%);
  filter: drop-shadow(0 40px 60px rgba(0, 0, 0, 0.5));
}

.chip {
  position: absolute;
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 15px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 12px;
  background: rgba(11, 35, 56, 0.82);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  box-shadow: 0 16px 34px rgba(0, 0, 0, 0.35);
  font-size: 12.5px;
  line-height: 1.35;
  color: rgba(255, 255, 255, 0.62);
  white-space: nowrap;
}
.chip b {
  display: block;
  font-size: 14px;
  font-weight: 800;
  color: #fff;
  letter-spacing: 0.02em;
}
.chip .ico {
  width: 26px;
  height: 26px;
  padding: 5px;
  border-radius: 8px;
  background: rgba(255, 106, 19, 0.16);
  color: var(--brand-2);
  flex: none;
}
.chip.c1 {
  top: 6%;
  left: 2%;
  animation: float 6s ease-in-out infinite;
}
.chip.c2 {
  bottom: 14%;
  left: 0;
  animation: float 7s ease-in-out infinite 0.8s;
}
.chip.c3 {
  top: 34%;
  right: 0;
  animation: float 6.5s ease-in-out infinite 0.4s;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-9px);
  }
}

/* Hero 底部数据条 */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding: 28px 0 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.09);
}
.hero-stat b {
  display: flex;
  align-items: baseline;
  gap: 3px;
  font-size: clamp(24px, 2.4vw, 32px);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #fff;
  line-height: 1.2;
}
.hero-stat b em {
  font-style: normal;
  color: var(--brand-2);
}
.hero-stat span {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

/* ---------- 通用区块 ---------- */
.section {
  position: relative;
  padding: 100px 0;
}
.section--tight {
  padding: 72px 0;
}
.section--alt {
  background: var(--bg);
}
.section--dark {
  background: radial-gradient(900px 500px at 82% 0%, rgba(255, 106, 19, 0.16), transparent 60%),
    linear-gradient(180deg, var(--navy-900), var(--navy-950));
  color: #fff;
}

.section-head {
  max-width: 720px;
  margin-bottom: 52px;
}
.section-head.center {
  margin-inline: auto;
  text-align: center;
}
.section-head .eyebrow {
  justify-content: flex-start;
}
.section-head.center .eyebrow {
  justify-content: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--brand-dark);
}
.eyebrow::before {
  content: "";
  width: 24px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
}
.section--dark .eyebrow {
  color: var(--brand-2);
}

.section-title {
  margin-top: 16px;
  font-size: clamp(28px, 3.1vw, 42px);
  line-height: 1.22;
}
.section-title .hl {
  color: var(--brand-dark);
}

.section-lead {
  margin-top: 18px;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--slate);
}
.section--dark .section-lead {
  color: rgba(255, 255, 255, 0.62);
}

.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));
}

/* ---------- 优势卡片 ---------- */
.feature-card {
  position: relative;
  padding: 34px 30px 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  overflow: hidden;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease),
    border-color 0.35s var(--ease);
}
.feature-card::after {
  content: "";
  position: absolute;
  left: 30px;
  right: 30px;
  top: 0;
  height: 3px;
  border-radius: 0 0 3px 3px;
  background: linear-gradient(90deg, var(--brand), var(--brand-2));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.45s var(--ease);
}
.feature-card:hover {
  transform: translateY(-6px);
  border-color: #d8e3ef;
  box-shadow: var(--shadow-md);
}
.feature-card:hover::after {
  transform: scaleX(1);
}

.icon-tile {
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  margin-bottom: 22px;
  border-radius: 14px;
  background: linear-gradient(145deg, #fff3ea, #ffe6d5);
  color: var(--brand-dark);
}
.icon-tile svg {
  width: 26px;
  height: 26px;
}

.feature-card h3 {
  font-size: 19px;
  letter-spacing: -0.01em;
}
.feature-card p {
  margin-top: 10px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

.feature-num {
  position: absolute;
  top: 22px;
  right: 26px;
  font-size: 44px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.04em;
  color: #f0f4f9;
  transition: color 0.35s;
}
.feature-card:hover .feature-num {
  color: #ffe9da;
}

/* ---------- 产品卡片 ---------- */
.product-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: #fff;
  overflow: hidden;
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease),
    border-color 0.4s var(--ease);
}
.product-card:hover {
  transform: translateY(-8px);
  border-color: #d6e2ef;
  box-shadow: 0 22px 50px rgba(9, 30, 50, 0.12);
}

.product-thumb {
  position: relative;
  display: grid;
  place-items: center;
  height: 252px;
  padding: 24px;
  background:
    radial-gradient(120% 90% at 50% 0%, #f4f9fd 0%, #e8f0f8 60%, #e2ebf4 100%);
  overflow: hidden;
}
.product-thumb::before {
  content: "";
  position: absolute;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.9), transparent 68%);
}
.product-thumb img {
  position: relative;
  height: 200px;
  width: auto;
  transition: transform 0.55s var(--ease);
}
.product-card:hover .product-thumb img {
  transform: translateY(-8px) scale(1.035);
}

.product-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 2;
  padding: 5px 11px;
  border-radius: 6px;
  background: rgba(7, 24, 42, 0.82);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.product-body {
  display: flex;
  flex: 1;
  flex-direction: column;
  padding: 26px 26px 28px;
}
.product-body h3 {
  font-size: 19px;
}
.product-sub {
  margin-top: 6px;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--brand-dark);
}
.product-body p {
  margin-top: 12px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}
.tag {
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #f8fafc;
  font-size: 12px;
  font-weight: 600;
  color: var(--slate);
}

.product-body .link-arrow {
  margin-top: auto;
  padding-top: 20px;
}

/* ---------- 行业解决方案 ---------- */
.solution-card {
  position: relative;
  display: flex;
  gap: 20px;
  padding: 30px 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  overflow: hidden;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease),
    border-color 0.35s var(--ease);
}
.solution-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 106, 19, 0.06), transparent 55%);
  opacity: 0;
  transition: opacity 0.35s;
}
.solution-card:hover {
  transform: translateY(-5px);
  border-color: #ffd3b6;
  box-shadow: var(--shadow-md);
}
.solution-card:hover::before {
  opacity: 1;
}
.solution-icon {
  position: relative;
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  flex: none;
  border-radius: 13px;
  background: var(--navy-900);
  color: var(--brand-2);
}
.solution-icon svg {
  width: 25px;
  height: 25px;
}
.solution-card h3 {
  position: relative;
  font-size: 18px;
}
.solution-card p {
  position: relative;
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}
.solution-tags {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
  font-size: 12px;
  color: var(--brand-dark);
  font-weight: 600;
}
.solution-tags span::after {
  content: "·";
  margin-left: 6px;
  color: #c9d5e2;
}
.solution-tags span:last-child::after {
  display: none;
}

/* ---------- 数据条 ---------- */
.stats-band {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.stat-item {
  padding: 8px 0 8px 26px;
  border-left: 2px solid rgba(255, 255, 255, 0.14);
}
.stat-num {
  display: flex;
  align-items: baseline;
  gap: 3px;
  font-size: clamp(32px, 3.6vw, 46px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.03em;
  color: #fff;
}
.stat-num em {
  font-style: normal;
  color: var(--brand-2);
}
.stat-label {
  margin-top: 10px;
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.55);
}

/* ---------- 案例 ---------- */
.case-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  overflow: hidden;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}
.case-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}
.case-visual {
  position: relative;
  height: 150px;
  padding: 24px 26px;
  background: linear-gradient(135deg, #0b2338, #15405f 70%, #1c5580);
  color: #fff;
  overflow: hidden;
}
.case-visual::after {
  content: "";
  position: absolute;
  right: -40px;
  bottom: -60px;
  width: 190px;
  height: 190px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 0 0 26px rgba(255, 255, 255, 0.04);
}
.case-visual .case-tag {
  display: inline-block;
  padding: 4px 10px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 5px;
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.8);
}
.case-visual h3 {
  position: relative;
  z-index: 1;
  margin-top: 14px;
  font-size: 18px;
  line-height: 1.5;
}
.case-body {
  display: flex;
  flex: 1;
  flex-direction: column;
  padding: 24px 26px 28px;
}
.case-body p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}
.case-metrics {
  display: flex;
  gap: 26px;
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px dashed var(--line);
}
.case-metrics b {
  display: block;
  font-size: 20px;
  font-weight: 800;
  color: var(--navy-800);
  letter-spacing: -0.02em;
}
.case-metrics span {
  font-size: 12px;
  color: var(--muted);
}

/* ---------- 资质条 ---------- */
.cert-strip {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}
.cert-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 20px 18px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.04);
  transition: background 0.3s, border-color 0.3s;
}
.cert-item:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 106, 19, 0.4);
}
.cert-item svg {
  width: 26px;
  height: 26px;
  flex: none;
  color: var(--brand-2);
}
.cert-item b {
  display: block;
  font-size: 13.5px;
  color: #fff;
}
.cert-item span {
  display: block;
  font-size: 11.5px;
  color: rgba(255, 255, 255, 0.45);
}

/* ---------- CTA ---------- */
.cta {
  position: relative;
  overflow: hidden;
  background: linear-gradient(120deg, #0a1e30, #103049 55%, #1a4a6b);
  color: #fff;
}
.cta::before {
  content: "";
  position: absolute;
  right: -120px;
  top: -120px;
  width: 460px;
  height: 460px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 106, 19, 0.32), transparent 65%);
}
.cta::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.5;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000);
  mask-image: linear-gradient(90deg, transparent, #000);
}
.cta-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  padding: 72px 0;
}
.cta h2 {
  font-size: clamp(26px, 2.8vw, 38px);
}
.cta p {
  margin-top: 12px;
  max-width: 560px;
  font-size: 15.5px;
  color: rgba(255, 255, 255, 0.66);
}
.cta-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  flex: none;
}

/* ---------- 页脚 ---------- */
.site-footer {
  padding-top: 76px;
  background: var(--navy-950);
  color: rgba(255, 255, 255, 0.6);
  font-size: 14px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 0.9fr 0.9fr 1.25fr;
  gap: 44px;
  padding-bottom: 56px;
}
.footer-brand .brand {
  color: #fff;
}
.footer-brand p {
  max-width: 340px;
  margin-top: 20px;
  font-size: 13.5px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.48);
}

.footer-col h4 {
  margin-bottom: 18px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #fff;
}
.footer-col li + li {
  margin-top: 10px;
}
.footer-col a {
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.5);
  transition: color 0.2s;
}
.footer-col a:hover {
  color: var(--brand-2);
}

.footer-contact li {
  display: flex;
  gap: 10px;
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.55);
}
.footer-contact li + li {
  margin-top: 12px;
}
.footer-contact svg {
  width: 16px;
  height: 16px;
  margin-top: 4px;
  flex: none;
  color: var(--brand-2);
}
.footer-contact b {
  color: #fff;
  font-size: 17px;
  letter-spacing: 0.02em;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 22px 0 26px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.35);
}
.footer-bottom a:hover {
  color: rgba(255, 255, 255, 0.7);
}

/* ---------- 内页 Hero ---------- */
.page-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + 76px) 0 76px;
  background:
    radial-gradient(900px 480px at 82% 8%, rgba(255, 106, 19, 0.18), transparent 62%),
    linear-gradient(180deg, #061423, #0a2337);
  color: #fff;
}
.page-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(ellipse 70% 100% at 70% 0%, #000, transparent 75%);
  mask-image: radial-gradient(ellipse 70% 100% at 70% 0%, #000, transparent 75%);
  pointer-events: none;
}
.page-hero .container {
  position: relative;
  z-index: 1;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
}
.breadcrumb a:hover {
  color: #fff;
}
.breadcrumb .sep {
  color: rgba(255, 255, 255, 0.25);
}
.page-hero h1 {
  margin-top: 20px;
  font-size: clamp(32px, 3.6vw, 48px);
}
.page-hero .lead {
  max-width: 660px;
  margin-top: 16px;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.66);
}
.page-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

/* ---------- 产品详情区块 ---------- */
.product-block {
  display: grid;
  grid-template-columns: 0.86fr 1.14fr;
  align-items: center;
  gap: 60px;
  padding: 72px 0;
  border-bottom: 1px solid var(--line);
}
.product-block:first-of-type {
  padding-top: 0;
}
.product-block:last-of-type {
  border-bottom: 0;
  padding-bottom: 0;
}
.product-block.is-reverse .product-media {
  order: 2;
}
.product-media {
  display: grid;
  place-items: center;
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: radial-gradient(120% 90% at 50% 0%, #f6fafd, #e7eff7);
}
.product-media img {
  height: 330px;
  width: auto;
}
.product-info .eyebrow {
  margin-bottom: 0;
}
.product-info h2 {
  margin-top: 14px;
  font-size: clamp(24px, 2.6vw, 32px);
}
.product-info > p {
  margin-top: 14px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--slate);
}

.ticks {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px 20px;
  margin-top: 24px;
}
.ticks li {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink);
}
.ticks svg {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  flex: none;
  color: var(--green);
}

.spec-table {
  width: 100%;
  margin-top: 26px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 14px;
  font-size: 14px;
}
.spec-table th,
.spec-table td {
  padding: 11px 16px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.spec-table tr:last-child th,
.spec-table tr:last-child td {
  border-bottom: 0;
}
.spec-table th {
  width: 32%;
  background: #f7fafd;
  font-weight: 600;
  color: var(--slate);
  white-space: nowrap;
}
.spec-table td {
  font-weight: 600;
  color: var(--ink);
}

.note {
  margin-top: 16px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 方案页 ---------- */
.solution-row {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
  align-items: center;
  padding: 64px 0;
  border-bottom: 1px solid var(--line);
}
.solution-row:first-of-type {
  padding-top: 0;
}
.solution-row:last-of-type {
  border-bottom: 0;
  padding-bottom: 0;
}
.solution-row.is-reverse .solution-visual {
  order: 2;
}
.solution-visual {
  position: relative;
  padding: 36px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(150deg, #0b2338, #123a56 65%, #1a4f70);
  color: #fff;
  overflow: hidden;
  min-height: 300px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.solution-visual::before {
  content: "";
  position: absolute;
  right: -120px;
  top: -120px;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 106, 19, 0.28), transparent 62%);
  pointer-events: none;
}
.solution-visual::after {
  content: "";
  position: absolute;
  right: -64px;
  bottom: -96px;
  width: 250px;
  height: 250px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 50%;
  box-shadow: 0 0 0 34px rgba(255, 255, 255, 0.035);
  pointer-events: none;
}
.solution-visual > * {
  position: relative;
  z-index: 1;
}
.solution-visual .num {
  font-size: 64px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.05em;
  color: rgba(255, 255, 255, 0.14);
}
.solution-visual h3 {
  font-size: 24px;
}
.solution-visual .pains {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}
.solution-visual .pains span {
  padding: 5px 10px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 5px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.72);
}
.solution-text h2 {
  font-size: clamp(24px, 2.6vw, 32px);
}
.solution-text p {
  margin-top: 14px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--slate);
}
.solution-points {
  margin-top: 22px;
}
.solution-points li {
  position: relative;
  padding-left: 20px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink);
}
.solution-points li + li {
  margin-top: 8px;
}
.solution-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--brand);
  transform: rotate(45deg);
}

/* ---------- 关于我们 ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: start;
}
.about-grid p {
  font-size: 15.5px;
  line-height: 1.95;
  color: var(--slate);
}
.about-grid p + p {
  margin-top: 18px;
}
.about-facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
  background: var(--line);
}
.about-facts div {
  padding: 26px 22px;
  background: #fff;
}
.about-facts b {
  display: block;
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--brand-dark);
  line-height: 1.1;
}
.about-facts span {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: var(--muted);
}

.timeline {
  position: relative;
  padding-left: 34px;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--brand), #e4eaf1 85%);
}
.timeline-item {
  position: relative;
  padding-bottom: 34px;
}
.timeline-item:last-child {
  padding-bottom: 0;
}
.timeline-item::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 6px;
  width: 14px;
  height: 14px;
  border: 3px solid var(--brand);
  border-radius: 50%;
  background: #fff;
  box-sizing: content-box;
  transform: translateX(-0px);
}
.timeline-item time {
  display: block;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--brand-dark);
}
.timeline-item h3 {
  margin-top: 6px;
  font-size: 17px;
}
.timeline-item p {
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.value-card {
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}
.value-card h3 {
  font-size: 18px;
}
.value-card p {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}
.value-card .icon-tile {
  margin-bottom: 18px;
}

/* ---------- 联系页 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 48px;
  align-items: start;
}

.contact-card {
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}
.contact-card + .contact-card {
  margin-top: 20px;
}
.contact-list li {
  display: flex;
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px dashed var(--line);
}
.contact-list li:first-child {
  padding-top: 0;
}
.contact-list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}
.contact-list .ico-wrap {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  flex: none;
  border-radius: 11px;
  background: #fff2e8;
  color: var(--brand-dark);
}
.contact-list .ico-wrap svg {
  width: 20px;
  height: 20px;
}
.contact-list small {
  display: block;
  font-size: 12.5px;
  color: var(--muted);
}
.contact-list strong {
  display: block;
  margin-top: 2px;
  font-size: 16.5px;
  font-weight: 800;
  letter-spacing: 0.01em;
}
.contact-list strong a:hover {
  color: var(--brand-dark);
}

.form-card {
  padding: 36px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow-sm);
}
.form-card h2 {
  font-size: 22px;
}
.form-card > p {
  margin-top: 8px;
  font-size: 13.5px;
  color: var(--muted);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin-top: 26px;
}
.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.field.full {
  grid-column: 1 / -1;
}
.field label {
  font-size: 13px;
  font-weight: 700;
  color: var(--slate);
}
.field label .req {
  color: #f04438;
}
.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 13px 15px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  font: inherit;
  font-size: 14.5px;
  color: var(--ink);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.field textarea {
  min-height: 120px;
  resize: vertical;
  line-height: 1.7;
}
.field input::placeholder,
.field textarea::placeholder {
  color: #a9b8c7;
}
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 4px rgba(255, 106, 19, 0.12);
}
.field.has-error input,
.field.has-error select,
.field.has-error textarea {
  border-color: #f04438;
}
.error-msg {
  display: none;
  font-size: 12px;
  color: #d92d20;
}
.field.has-error .error-msg {
  display: block;
}

.form-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-top: 24px;
}
.form-foot small {
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
}

.map-box {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 280px;
  margin-top: 20px;
  padding: 28px;
  border: 1px dashed #cfdae6;
  border-radius: var(--radius);
  background-color: #f4f8fc;
  background-image:
    repeating-linear-gradient(0deg, transparent 0 37px, #e3ebf3 37px 38px),
    repeating-linear-gradient(90deg, transparent 0 37px, #e3ebf3 37px 38px);
  text-align: center;
}
.map-box .pin {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  margin: 0 auto 14px;
  border-radius: 50%;
  background: #fff;
  color: var(--brand-dark);
  box-shadow: 0 12px 26px rgba(9, 30, 50, 0.14);
}
.map-box b {
  display: block;
  font-size: 15px;
}
.map-box span {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  color: var(--muted);
}

/* ---------- 面包屑下的锚点导航 ---------- */
.anchor-nav {
  position: sticky;
  top: var(--header-h);
  z-index: 40;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.95);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}
.anchor-nav .container {
  display: flex;
  gap: 30px;
  overflow-x: auto;
  scrollbar-width: none;
}
.anchor-nav .container::-webkit-scrollbar {
  display: none;
}
.anchor-nav a {
  position: relative;
  padding: 18px 0;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--slate);
  white-space: nowrap;
  transition: color 0.2s;
}
.anchor-nav a:hover,
.anchor-nav a.is-active {
  color: var(--brand-dark);
}
.anchor-nav a.is-active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: var(--brand);
}

/* ---------- 流程步骤 ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}
.step {
  position: relative;
  padding-top: 26px;
  border-top: 2px solid var(--line);
}
.step::before {
  counter-increment: step;
  content: "0" counter(step);
  position: absolute;
  top: -14px;
  left: 0;
  padding-right: 12px;
  background: #fff;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--brand-dark);
}
.section--alt .step::before {
  background: var(--bg);
}
.step h3 {
  font-size: 16.5px;
}
.step p {
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 提示条 ---------- */
.demo-note {
  padding: 10px 20px;
  background: #fff8f1;
  border-bottom: 1px solid #ffe3cc;
  font-size: 12.5px;
  color: #9a5b22;
  text-align: center;
}
.demo-note b {
  color: #7a4210;
}

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 34px;
  z-index: 200;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  border-radius: 12px;
  background: rgba(10, 26, 41, 0.95);
  color: #fff;
  font-size: 14px;
  box-shadow: var(--shadow-lg);
  transform: translate(-50%, 20px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, transform 0.3s, visibility 0.3s;
}
.toast.is-show {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
}
.toast svg {
  width: 18px;
  height: 18px;
  color: #4ade80;
}

/* ---------- 滚动进场 ---------- */
/* 只有 JS 可用时才启用进场位移；不做透明度变化，避免任何情况下内容发灰 */
.js .reveal {
  transform: translateY(24px);
  transition: transform 0.7s var(--ease);
  transition-delay: var(--d, 0s);
}
.js .reveal.is-visible {
  transform: none;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .header-phone {
    display: none;
  }
  .hero-inner {
    gap: 24px;
  }
  .grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .cert-strip {
    grid-template-columns: repeat(3, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1.4fr 1fr 1.2fr;
  }
  .stats-band {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px 20px;
  }
  .steps {
    grid-template-columns: repeat(2, 1fr);
    gap: 36px 24px;
  }
  .chip.c3 {
    right: -4%;
  }
}

@media (max-width: 900px) {
  :root {
    --header-h: 68px;
  }
  .nav {
    display: none;
  }
  .nav-toggle {
    display: grid;
  }
  .nav-drawer {
    display: flex;
  }
  .header-actions .btn {
    display: none;
  }
  .header-actions {
    margin-left: auto;
  }
  .hero-inner {
    grid-template-columns: 1fr;
    min-height: 0;
    padding: 48px 0 40px;
  }
  .hero-visual {
    min-height: 380px;
    margin-top: 20px;
  }
  .hero-ring.r2 {
    width: 460px;
    height: 460px;
  }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px 24px;
    padding-bottom: 36px;
  }
  .section {
    padding: 76px 0;
  }
  .section-head {
    margin-bottom: 40px;
  }
  .product-block,
  .solution-row,
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .product-block.is-reverse .product-media,
  .solution-row.is-reverse .solution-text {
    order: 0;
  }
  .product-block,
  .solution-row {
    padding: 48px 0;
  }
  .product-media img {
    height: 260px;
  }
  .cta-inner {
    flex-direction: column;
    align-items: flex-start;
    padding: 56px 0;
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 36px;
  }
  .anchor-nav {
    top: var(--header-h);
  }
}

@media (max-width: 640px) {
  .header-actions {
    gap: 10px;
  }
  .brand-mark {
    width: 38px;
    height: 38px;
  }
  .brand-text strong {
    font-size: 17px;
  }
  .brand-text small {
    font-size: 8px;
    letter-spacing: 0.16em;
  }
  .hero h1 {
    font-size: 34px;
  }
  .hero-lead {
    font-size: 15.5px;
  }
  .hero-actions .btn {
    flex: 1;
    padding: 14px 18px;
  }
  .hero-visual {
    min-height: 320px;
  }
  .hero-product {
    width: min(300px, 80%);
  }
  .hero-ring.r1 {
    width: 300px;
    height: 300px;
  }
  .hero-ring.r2 {
    width: 340px;
    height: 340px;
  }
  .hero-ring.r3 {
    width: 230px;
    height: 230px;
  }
  .chip {
    padding: 8px 11px;
    font-size: 11px;
  }
  .chip b {
    font-size: 12.5px;
  }
  .chip .ico {
    display: none;
  }
  .chip.c1 {
    left: -2%;
    top: 0;
  }
  .chip.c2 {
    bottom: 4%;
    left: -2%;
  }
  .chip.c3 {
    right: -2%;
    top: 28%;
  }
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  .cert-strip {
    grid-template-columns: 1fr 1fr;
  }
  .stats-band,
  .hero-stats {
    grid-template-columns: 1fr 1fr;
  }
  .stat-item {
    padding-left: 18px;
  }
  .steps {
    grid-template-columns: 1fr;
  }
  .form-grid {
    grid-template-columns: 1fr;
  }
  .form-card {
    padding: 26px 22px;
  }
  .form-foot {
    flex-direction: column;
    align-items: stretch;
  }
  .form-foot .btn {
    width: 100%;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .ticks {
    grid-template-columns: 1fr;
  }
  .spec-table th {
    width: 40%;
  }
  .about-facts {
    grid-template-columns: 1fr 1fr;
  }
  .product-media {
    padding: 22px;
  }
  .product-media img {
    height: 230px;
  }
  .product-thumb {
    height: 220px;
  }
  .product-thumb img {
    height: 175px;
  }
  .cta-actions .btn {
    width: 100%;
  }
  .page-hero {
    padding: calc(var(--header-h) + 52px) 0 56px;
  }
}

/* ---------- 资质条（浅色底） ---------- */
.cert-strip--light .cert-item {
  border-color: var(--line);
  background: #fff;
  box-shadow: var(--shadow-sm);
}
.cert-strip--light .cert-item:hover {
  border-color: #ffd3b6;
  background: #fff;
}
.cert-strip--light .cert-item svg {
  color: var(--brand-dark);
}
.cert-strip--light .cert-item b {
  color: var(--ink);
}
.cert-strip--light .cert-item span {
  color: var(--muted);
}

/* ---------- FAQ ---------- */
.faq {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}
.faq details {
  border-bottom: 1px solid var(--line);
}
.faq details:last-child {
  border-bottom: 0;
}
.faq summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 22px 26px;
  font-size: 15.5px;
  font-weight: 700;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
  transition: background 0.2s;
}
.faq summary::-webkit-details-marker {
  display: none;
}
.faq summary:hover {
  background: #f8fafc;
}
.faq summary::after {
  content: "+";
  flex: none;
  font-size: 22px;
  font-weight: 400;
  line-height: 1;
  color: var(--brand);
  transition: transform 0.25s var(--ease);
}
.faq details[open] summary::after {
  transform: rotate(45deg);
}
.faq details[open] summary {
  color: var(--brand-dark);
}
.faq p {
  padding: 0 26px 24px;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--slate);
}

/* ---------- 锚点偏移（避免被固定导航遮挡） ---------- */
.product-block,
.solution-row,
section[id] {
  scroll-margin-top: calc(var(--header-h) + 20px);
}
.anchor-nav + .section .product-block {
  scroll-margin-top: calc(var(--header-h) + 72px);
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .hero-visual {
    min-height: 300px;
  }
  .hero-product {
    width: min(280px, 78%);
  }
}

/* ---------- 左右分栏（历程 + 侧栏卡片） ---------- */
.split {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: start;
}
@media (max-width: 900px) {
  .split {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

.aside-card {
  position: relative;
  overflow: hidden;
  padding: 40px 36px;
  border-radius: 24px;
  background: linear-gradient(150deg, #0b2338, #123a56 60%, #1a4f70);
  color: #fff;
}
.aside-card::before {
  content: "";
  position: absolute;
  right: -110px;
  top: -110px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 106, 19, 0.3), transparent 62%);
}
.aside-card::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -100px;
  width: 240px;
  height: 240px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 50%;
  box-shadow: 0 0 0 32px rgba(255, 255, 255, 0.035);
}
.aside-card > * {
  position: relative;
  z-index: 1;
}
.aside-num {
  font-size: 62px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.04em;
}
.aside-num em {
  margin-left: 6px;
  font-style: normal;
  font-size: 20px;
  font-weight: 700;
  color: var(--brand-2);
}
.aside-title {
  margin-top: 10px;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.01em;
}
.aside-text {
  margin-top: 14px;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.62);
}
.aside-list {
  display: grid;
  gap: 14px;
  margin-top: 26px;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}
.aside-list li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}
.aside-list b {
  font-size: 16px;
  font-weight: 800;
  color: #fff;
}
.aside-list span {
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.5);
}

/* ---------- 关键参数块（产品详情页） ---------- */
.spec-highlights {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-top: 26px;
}
.spec-highlights > div {
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #f8fafc;
}
.spec-highlights b {
  display: block;
  font-size: 15px;
  font-weight: 800;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.spec-highlights span {
  display: block;
  margin-top: 3px;
  font-size: 11.5px;
  color: var(--muted);
}


/* 白底实拍图与浅色背景融合 */
.product-media img,
.product-thumb img {
  mix-blend-mode: multiply;
}

/* ---------- 首屏标语（替代数据条） ---------- */
.hero-note {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  padding: 26px 0 38px;
  border-top: 1px solid rgba(255, 255, 255, 0.09);
}
.hero-note strong {
  font-size: clamp(22px, 2.2vw, 30px);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #fff;
}
.hero-note strong::after {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-left: 14px;
  border-radius: 50%;
  background: var(--brand);
  vertical-align: middle;
}
.hero-note span {
  font-size: 15px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.62);
}


/* ---------- 资质证书缩略图墙 ---------- */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 28px;
}
.cert-grid figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  box-shadow: var(--shadow-sm);
}
.cert-grid img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}
.cert-grid figcaption {
  padding: 10px 8px;
  border-top: 1px solid var(--line);
  font-size: 11.5px;
  line-height: 1.4;
  color: var(--muted);
  text-align: center;
}
@media (max-width: 900px) {
  .cert-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .cert-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}


/* ---------- 第三方表单嵌入 ---------- */
.form-embed {
  margin-top: 20px;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: #fff;
}
.form-embed iframe {
  display: block;
  width: 100%;
  height: 1250px;
  border: 0;
}
@media (max-width: 640px) {
  .form-embed iframe { height: 1450px; }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .js .reveal {
    transform: none;
  }
}

/* ---------- 打印 ---------- */
@media print {
  .site-header,
  .nav-drawer,
  .cta,
  .hero-visual,
  .toast {
    display: none !important;
  }
  body {
    color: #000;
  }
  .hero,
  .page-hero {
    background: #fff !important;
    color: #000 !important;
    padding-top: 0;
  }
}