/* ==========================================================================
   迅立达电梯有限公司 — 主样式
   视觉母题：电梯井道（导轨竖线 · 楼层横线 · 双斜切 · 数据刻度 · 安全环）
   目录：
     01  Reset
     02  基础排版
     03  布局容器 / 区块
     04  背景纹理（井道导轨 · 光晕）
     05  按钮
     06  卡片 / 导轨切角
     07  导航
     08  页脚
     09  Hero
     10  组件（指标 · 时间轴 · 表格 · 标签 · 分页 · 表单）
     10B 迅立达专有组件（刻度条 · 安全环 · 能力卡 · 拓扑 · 团队 · 案例）
     11  滚动揭示动画
     12  响应式
   ========================================================================== */

/* ===== 01 Reset ========================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body,
h1,
h2,
h3,
h4,
p,
figure,
blockquote,
dl,
dd,
ul,
ol {
  margin: 0;
}

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

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

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

button {
  background: none;
  border: 0;
  cursor: pointer;
}

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

table {
  border-collapse: collapse;
  width: 100%;
}

::selection {
  background: rgba(56, 189, 248, 0.28);
  color: #fff;
}

/* ===== 02 基础排版 ======================================================= */

body {
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.9;
  color: var(--text-2);
  background: var(--bg-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1,
h2,
h3,
h4 {
  color: var(--text-1);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: 0.04em;
}

h1 {
  font-size: var(--fs-h1);
}
h2 {
  font-size: var(--fs-h2);
}
h3 {
  font-size: var(--fs-h3);
}

p {
  max-width: 70ch;
}

strong {
  color: var(--text-1);
  font-weight: 600;
}

/* 金属拉丝文字 */
.metal-text {
  background: var(--metal);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}

/* 英文小字标 —— 本站科技感的核心手法 */
.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  line-height: 1.6;
}

.num {
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum";
}

/* ===== 03 布局容器 / 区块 ================================================ */

.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--sp-gutter);
}

.section {
  position: relative;
  padding-block: var(--sp-section);
  /* 装饰性光晕（.bg-glow）会越出区块边界，在此裁掉，
     否则窄屏下会撑出横向滚动条 */
  overflow: hidden;
}

.section--sink {
  background: var(--bg-sink);
  border-block: 1px solid var(--line);
}

.section--raise {
  background: var(--bg-raise);
}

/* 区块头：编号 + 短横线 + 标题 */
.sec-head {
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.sec-head__index {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  margin-bottom: 1.25rem;
}

.sec-head__index span {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.18em;
  color: var(--text-3);
}

.sec-head__index::after {
  content: "";
  width: 40px;
  height: 1px;
  background: var(--line-strong);
}

.sec-head__title {
  font-size: var(--fs-h2);
  margin-bottom: 1rem;
}

.sec-head__desc {
  color: var(--text-2);
  max-width: 60ch;
}

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

.sec-head--center .sec-head__index {
  justify-content: center;
}

.sec-head--center .sec-head__index::before {
  content: "";
  width: 40px;
  height: 1px;
  background: var(--line-strong);
}

.sec-head--center .sec-head__desc {
  margin-inline: auto;
}

/* 通用栅格 */
.grid {
  display: grid;
  gap: 1.25rem;
}

.grid--2 {
  grid-template-columns: repeat(2, 1fr);
}
.grid--3 {
  grid-template-columns: repeat(3, 1fr);
}
.grid--4 {
  grid-template-columns: repeat(4, 1fr);
}

/* ===== 04 背景纹理 ======================================================= */

/* 井道网格 —— 竖向导轨（密）+ 横向楼层线（疏、更淡），挂在需要的区块上。
   与工程图纸的等距方格不同，纵横间距刻意不等，读起来是「井道」而不是「坐标纸」 */
.bg-grid {
  position: relative;
  isolation: isolate;
}

.bg-grid::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image: repeating-linear-gradient(
      to right,
      var(--rail-line) 0 1px,
      transparent 1px var(--rail-gap)
    ),
    repeating-linear-gradient(
      to bottom,
      var(--floor-line) 0 1px,
      transparent 1px var(--floor-gap)
    );
  mask-image: radial-gradient(ellipse 90% 70% at 50% 40%, #000 30%, transparent);
  -webkit-mask-image: radial-gradient(
    ellipse 90% 70% at 50% 40%,
    #000 30%,
    transparent
  );
  pointer-events: none;
}

/* 呼吸光团 —— 缓慢漂移缩放，给深底页面制造纵深与"活着"的感觉 */
.bg-breathe {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  background: radial-gradient(
    circle,
    rgba(56, 189, 248, 0.24) 0%,
    transparent 62%
  );
  filter: blur(46px);
  animation: bgBreathe 14s ease-in-out infinite;
}

.bg-breathe--safety {
  background: radial-gradient(
    circle,
    rgba(245, 185, 66, 0.17) 0%,
    transparent 62%
  );
  animation-duration: 18s;
  animation-direction: reverse;
}

@keyframes bgBreathe {
  0%,
  100% {
    transform: translate(0, 0) scale(1);
    opacity: 0.85;
  }
  50% {
    transform: translate(-42px, 36px) scale(1.14);
    opacity: 1;
  }
}

/* 扫描光带 —— 一条青蓝细线自上而下扫过，检测/巡检的隐喻 */
.bg-scan {
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  pointer-events: none;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(56, 189, 248, 0.75),
    transparent
  );
  animation: bgScan 8s ease-in-out infinite;
}

@keyframes bgScan {
  0% {
    transform: translateY(0);
    opacity: 0;
  }
  12% {
    opacity: 1;
  }
  88% {
    opacity: 1;
  }
  100% {
    transform: translateY(100vh);
    opacity: 0;
  }
}

/* 井道光带 —— 一对导轨 + 沿导轨上行的光点。只用在 Hero。 */
.bg-shaft {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.bg-shaft__rail {
  position: absolute;
  top: -10%;
  bottom: -10%;
  width: 1px;
  background: linear-gradient(
    to bottom,
    transparent,
    var(--line-strong) 22%,
    var(--line-strong) 78%,
    transparent
  );
}

/* 沿导轨上行的光点：轿厢的抽象 */
.bg-shaft__car {
  position: absolute;
  left: -1px;
  width: 3px;
  height: 22%;
  background: linear-gradient(
    to bottom,
    transparent,
    var(--accent) 45%,
    var(--accent) 55%,
    transparent
  );
  filter: blur(1px);
  opacity: 0.55;
  animation: shaftRun 11s var(--ease) infinite;
}

@keyframes shaftRun {
  0% {
    transform: translateY(120%);
    opacity: 0;
  }
  12% {
    opacity: 0.55;
  }
  78% {
    opacity: 0.55;
  }
  100% {
    transform: translateY(-320%);
    opacity: 0;
  }
}

/* 钢蓝光晕 */
.bg-glow {
  position: absolute;
  border-radius: 50%;
  background: var(--glow);
  filter: blur(20px);
  pointer-events: none;
  z-index: 0;
}

.bg-glow--safety {
  background: var(--glow-safety);
}

/* 顶部细金属线 */
.hairline {
  height: 1px;
  background: var(--metal-line);
  opacity: 0.5;
}

/* ===== 05 按钮 =========================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.875rem 1.75rem;
  font-size: var(--fs-sm);
  letter-spacing: 0.06em;
  border: 1px solid var(--line-strong);
  color: var(--text-1);
  background: transparent;
  transition: color var(--dur) var(--ease),
    border-color var(--dur) var(--ease), background var(--dur) var(--ease),
    transform var(--dur) var(--ease);
  clip-path: polygon(
    10px 0,
    100% 0,
    100% calc(100% - 10px),
    calc(100% - 10px) 100%,
    0 100%,
    0 10px
  );
}

.btn svg {
  width: 16px;
  height: 16px;
  flex: none;
  transition: transform var(--dur) var(--ease);
}

.btn:hover {
  border-color: var(--line-accent);
  color: #fff;
  background: var(--accent-soft);
}

.btn:hover svg {
  transform: translateX(3px);
}

.btn--primary {
  background: linear-gradient(120deg, var(--accent), var(--accent-deep));
  border-color: transparent;
  color: var(--on-accent);
  font-weight: 600;
}

.btn--primary:hover {
  background: linear-gradient(120deg, #7cd6ff, #0f8ac2);
  color: var(--on-accent);
  transform: translateY(-2px);
}

.btn--ghost {
  border-color: var(--line);
  color: var(--text-2);
}

/* 文字链接箭头 */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--fs-sm);
  color: var(--accent);
  letter-spacing: 0.06em;
  transition: gap var(--dur) var(--ease);
}

.link-arrow svg {
  width: 15px;
  height: 15px;
  flex: none;
}

.link-arrow:hover {
  gap: 0.875rem;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

/* ===== 06 卡片 / 切角 ==================================================== */

.card {
  position: relative;
  padding: clamp(1.5rem, 3vw, 2.25rem);
  background: var(--bg-raise);
  border: 1px solid var(--line);
  transition: border-color var(--dur) var(--ease),
    transform var(--dur) var(--ease), background var(--dur) var(--ease);
  clip-path: polygon(
    var(--bevel) 0,
    100% 0,
    100% calc(100% - var(--bevel)),
    calc(100% - var(--bevel)) 100%,
    0 100%,
    0 var(--bevel)
  );
}

.card:hover {
  border-color: var(--line-accent);
  background: var(--bg-raise-2);
  transform: translateY(-4px);
}

/* 卡片顶部冷蓝进度线 */
.card--lit::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
  transition: width 0.6s var(--ease);
}

.card--lit:hover::after {
  width: 60%;
}

.card__icon {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  color: var(--accent);
  margin-bottom: 1.5rem;
  transition: border-color var(--dur) var(--ease),
    background var(--dur) var(--ease);
}

.card__icon svg {
  width: 24px;
  height: 24px;
}

.card:hover .card__icon {
  border-color: var(--line-accent);
  background: var(--accent-softer);
}

.card__no {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.18em;
  color: var(--text-3);
  margin-bottom: 0.75rem;
}

.card__title {
  font-size: 1.125rem;
  margin-bottom: 0.75rem;
}

.card__text {
  font-size: var(--fs-sm);
  color: var(--text-2);
  line-height: 1.85;
}

/* 卡片内的 SVG 图形舞台 */
.figure {
  position: relative;
  aspect-ratio: 4 / 3;
  background: linear-gradient(160deg, #121a28, #070b12);
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
  overflow: hidden;
}

.figure svg {
  width: 78%;
  height: auto;
  color: var(--accent);
  opacity: 0.85;
  transition: transform 0.7s var(--ease), opacity var(--dur) var(--ease);
}

.figure::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
      to right,
      var(--rail-line) 0 1px,
      transparent 1px 32px
    ),
    repeating-linear-gradient(
      to bottom,
      var(--rail-line) 0 1px,
      transparent 1px 32px
    );
}

.figure:hover svg,
.card:hover .figure svg {
  transform: scale(1.05);
  opacity: 1;
}

/* ===== 07 导航 =========================================================== */

.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: var(--z-nav);
  transition: background var(--dur) var(--ease),
    border-color var(--dur) var(--ease), padding var(--dur) var(--ease);
  border-bottom: 1px solid transparent;
  padding-block: 1.125rem;
}

/* 吸顶态。默认给足不透明度：产品页那类亮色线框图从导航下面滚过时，
   只靠 0.78 的半透明会透出图形，导航文字读不清。支持毛玻璃的浏览器再降回半透明。 */
.nav.is-stuck {
  background: rgba(7, 11, 20, 0.94);
  border-bottom-color: var(--line);
  padding-block: 0.625rem;
}

@supports (backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px)) {
  .nav.is-stuck {
    background: rgba(7, 11, 20, 0.82);
    backdrop-filter: blur(20px) saturate(160%);
    -webkit-backdrop-filter: blur(20px) saturate(160%);
  }
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

/* Logo —— 切角方标 + 竖排两行字 */
.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex: none;
}

.logo__mark {
  width: 44px;
  height: 44px;
  display: grid;
  place-content: center;
  gap: 1px;
  background: linear-gradient(145deg, #1d6fa8, #0b2f52);
  color: #fff;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.15;
  text-align: center;
  clip-path: polygon(
    8px 0,
    100% 0,
    100% calc(100% - 8px),
    calc(100% - 8px) 100%,
    0 100%,
    0 8px
  );
}

.logo__mark svg {
  width: 24px;
  height: 24px;
}

.logo__name {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--text-1);
  letter-spacing: 0.06em;
  line-height: 1.3;
}

.logo__en {
  font-family: var(--font-mono);
  font-size: 0.5625rem;
  letter-spacing: 0.16em;
  color: var(--text-3);
  text-transform: uppercase;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.5vw, 2.25rem);
}

.nav__link {
  position: relative;
  font-size: var(--fs-sm);
  color: var(--text-2);
  letter-spacing: 0.06em;
  padding-block: 0.375rem;
  transition: color var(--dur) var(--ease);
  white-space: nowrap;
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width var(--dur) var(--ease);
}

.nav__link:hover,
.nav__link.is-active {
  color: var(--text-1);
}

.nav__link:hover::after,
.nav__link.is-active::after {
  width: 100%;
}

.nav__cta {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex: none;
}

.nav__tel {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--text-1);
  letter-spacing: 0.04em;
}

.nav__tel svg {
  width: 15px;
  height: 15px;
  color: var(--accent);
  flex: none;
}

/* 汉堡 */
.burger {
  display: none;
  width: 44px;
  height: 44px;
  place-items: center;
  border: 1px solid var(--line-strong);
  color: var(--text-1);
}

.burger svg {
  width: 20px;
  height: 20px;
}

/* 移动端抽屉 */
.drawer {
  position: fixed;
  inset: 0;
  z-index: var(--z-drawer);
  background: rgba(4, 7, 14, 0.97);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  display: flex;
  flex-direction: column;
  padding: 1.5rem var(--sp-gutter) 3rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-12px);
  transition: opacity 0.4s var(--ease), transform 0.4s var(--ease),
    visibility 0.4s;
}

.drawer.is-open {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.drawer__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 3rem;
}

.drawer__links {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.drawer__link {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding-block: 1rem;
  border-bottom: 1px solid var(--line);
  font-size: 1.375rem;
  color: var(--text-1);
  letter-spacing: 0.06em;
}

.drawer__link span {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  color: var(--text-3);
  letter-spacing: 0.18em;
}

.drawer__foot {
  margin-top: auto;
  padding-top: 2.5rem;
  display: grid;
  gap: 0.5rem;
  font-size: var(--fs-sm);
}

/* ===== 08 页脚 =========================================================== */

.footer {
  background: var(--bg-sink);
  border-top: 1px solid var(--line);
  padding-top: clamp(3.5rem, 7vw, 5.5rem);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.3fr;
  gap: 2.5rem;
  padding-bottom: 3.5rem;
}

.footer__title {
  font-size: var(--fs-sm);
  color: var(--text-1);
  letter-spacing: 0.14em;
  margin-bottom: 1.5rem;
  font-weight: 600;
}

.footer__list {
  display: grid;
  gap: 0.75rem;
  font-size: var(--fs-sm);
}

.footer__list a {
  color: var(--text-2);
  transition: color var(--dur) var(--ease);
}

.footer__list a:hover {
  color: var(--accent);
}

.footer__contact {
  display: grid;
  gap: 1rem;
  font-size: var(--fs-sm);
}

.footer__contact div {
  display: grid;
  grid-template-columns: 4.5em 1fr;
  gap: 0.5rem;
  align-items: start;
}

.footer__contact dt {
  color: var(--text-3);
}

.footer__contact dd {
  margin: 0;
  color: var(--text-2);
  line-height: 1.7;
}

.footer__bar {
  border-top: 1px solid var(--line);
  padding-block: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  font-size: var(--fs-caption);
  color: var(--text-3);
}

.footer__bar span {
  font-variant-numeric: tabular-nums;
}

/* ===== 09 Hero =========================================================== */

.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding-top: 7rem;
  padding-bottom: 4rem;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

/* Hero 主视觉：右侧发光的电梯核心装置 */
.hero__stage {
  position: relative;
  display: grid;
  place-items: center;
}

.hero__core {
  width: 100%;
  max-width: 620px;
  height: auto;
  /* 整体发光：这一句是「高级感」的主要来源，比线稿平铺强得多 */
  filter: drop-shadow(0 20px 60px rgba(56, 189, 248, 0.34));
}

/* ---- SVG 动画 ----
   注意：SVG 元素默认以 viewBox 左上角为变换原点，直接写 transform-origin:center
   会让缩放严重偏移。必须用 transform-box: fill-box 把参照系限定到元素自身包围盒。 */

/* 轨道环：内外反向旋转 + 一道快速扫掠 */
.ring-slow {
  animation: coreSpin 48s linear infinite;
  transform-origin: 310px 310px;
}
.ring-rev {
  animation: coreSpin 36s linear infinite reverse;
  transform-origin: 310px 310px;
}
.ring-sweep {
  animation: coreSpin 9s linear infinite;
  transform-origin: 310px 310px;
}
.ring-orbit {
  animation: coreSpin 64s linear infinite;
  transform-origin: 310px 310px;
}

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

/* 轿厢沿井道上下往复 —— 这是整个视觉的主角 */
.car-run {
  animation: carRun 9s ease-in-out infinite;
}

@keyframes carRun {
  0%,
  100% {
    transform: translateY(66px);
  }
  50% {
    transform: translateY(-66px);
  }
}

/* 楼层灯依次点亮，跟着轿厢走 */
.floor-lamp {
  transform-box: fill-box;
  transform-origin: center;
  animation: lampOn 9s ease-in-out infinite;
}
.floor-lamp:nth-of-type(1) {
  animation-delay: 0s;
}
.floor-lamp:nth-of-type(2) {
  animation-delay: 1.1s;
}
.floor-lamp:nth-of-type(3) {
  animation-delay: 2.2s;
}
.floor-lamp:nth-of-type(4) {
  animation-delay: 3.3s;
}
.floor-lamp:nth-of-type(5) {
  animation-delay: 4.4s;
}

@keyframes lampOn {
  0%,
  70%,
  100% {
    opacity: 0.22;
    transform: scale(1);
  }
  14%,
  22% {
    opacity: 1;
    transform: scale(1.5);
  }
}

/* 数据节点脉冲 */
.node-pulse {
  transform-box: fill-box;
  transform-origin: center;
  animation: nodePulse 3s ease-in-out infinite;
}
.node-pulse:nth-of-type(2) {
  animation-delay: 0.75s;
}
.node-pulse:nth-of-type(3) {
  animation-delay: 1.5s;
}
.node-pulse:nth-of-type(4) {
  animation-delay: 2.25s;
}

@keyframes nodePulse {
  0%,
  100% {
    transform: scale(1);
    opacity: 0.85;
  }
  50% {
    transform: scale(1.45);
    opacity: 1;
  }
}

/* 数据流：虚线沿路径流动 */
.flow-dash {
  animation: flowDash 1.6s linear infinite;
}

@keyframes flowDash {
  to {
    stroke-dashoffset: -28;
  }
}

/* 载荷条上下浮动 */
.load-bar {
  transform-box: fill-box;
  transform-origin: bottom;
  animation: loadBar 2.4s ease-in-out infinite;
}
.load-bar:nth-of-type(2) {
  animation-delay: 0.3s;
}
.load-bar:nth-of-type(3) {
  animation-delay: 0.6s;
}
.load-bar:nth-of-type(4) {
  animation-delay: 0.9s;
}
.load-bar:nth-of-type(5) {
  animation-delay: 1.2s;
}

@keyframes loadBar {
  0%,
  100% {
    transform: scaleY(0.45);
    opacity: 0.7;
  }
  50% {
    transform: scaleY(1);
    opacity: 1;
  }
}

/* 曳引轮持续转动 */
.sheave-spin {
  transform-box: fill-box;
  transform-origin: center;
  animation: coreSpin 14s linear infinite;
}

/* 状态点闪烁 */
.blink {
  animation: blink 2.2s ease-in-out infinite;
}

@keyframes blink {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.25;
  }
}

.hero__inner {
  position: relative;
  z-index: 1;
  width: 100%;
  display: grid;
  grid-template-columns: 1.04fr 0.96fr;
  align-items: center;
  gap: clamp(2rem, 5vw, 3.5rem);
}

.hero__eyebrow {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  margin-bottom: 2rem;
}

.hero__eyebrow::before {
  content: "";
  width: 56px;
  height: 1px;
  background: var(--accent);
}

.hero__title {
  font-size: var(--fs-display);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0.02em;
  margin-bottom: 1.75rem;
  /* 中文标题不留 max-width 硬裁：改由 HTML 里的 <br> 控制断行，
     避免「让每一次垂直移 / 动」这种把词拆开的丑断行 */
  max-width: none;
  text-wrap: balance;
}

/* 标题里的高亮词：钢蓝渐变 + 微光，让大标题有一个视觉落点 */
.hl {
  background: linear-gradient(120deg, #7cd6ff 0%, #38bdf8 46%, #b8e9ff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  /* text-shadow 在 clip:text 上不生效，用 drop-shadow 给渐变字加光 */
  filter: drop-shadow(0 0 22px rgba(56, 189, 248, 0.4));
}

.hero__sub {
  font-size: clamp(1rem, 1.6vw, 1.1875rem);
  max-width: 46ch;
  margin-bottom: 2.75rem;
  color: var(--text-2);
}

.hero__meta {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(3rem, 7vw, 5rem);
  background: var(--line);
  border: 1px solid var(--line);
  max-width: 720px;
}

.hero__meta > div {
  background: rgba(7, 11, 20, 0.6);
  padding: 1.5rem 1.5rem 1.375rem;
}

.hero__meta dt {
  font-size: var(--fs-caption);
  color: var(--text-3);
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}

.hero__meta dd {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-1);
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}

.hero__meta dd small {
  font-size: 0.8125rem;
  font-weight: 400;
  color: var(--text-3);
  margin-left: 0.375rem;
  /* 「安徽界首」「高新技术企业」这类短词不允许拆行 */
  white-space: nowrap;
}

/* 滚动提示：鼠标轮廓 + 里面上下跳的小点 */
.scroll-hint {
  position: absolute;
  left: 50%;
  bottom: 1.75rem;
  z-index: 2;
  transform: translateX(-50%);
  width: 24px;
  height: 38px;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  display: grid;
  justify-items: center;
  padding-top: 7px;
  pointer-events: none;
}

.scroll-hint::before {
  content: "";
  width: 3px;
  height: 7px;
  border-radius: 2px;
  background: var(--accent);
  animation: scrollDot 2s ease-in-out infinite;
}

@keyframes scrollDot {
  0%,
  100% {
    transform: translateY(0);
    opacity: 1;
  }
  50% {
    transform: translateY(12px);
    opacity: 0.3;
  }
}

/* 页内小 Hero（二级页） */
.phero {
  position: relative;
  padding-top: clamp(9rem, 16vw, 12rem);
  padding-bottom: clamp(3.5rem, 7vw, 5.5rem);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.phero__title {
  font-size: var(--fs-h1);
  font-weight: 700;
  margin-block: 1.25rem 1rem;
}

.phero__desc {
  color: var(--text-2);
  max-width: 56ch;
}

/* 面包屑 */
.crumb {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-size: var(--fs-caption);
  color: var(--text-3);
  margin-bottom: 0.5rem;
}

.crumb a {
  transition: color var(--dur) var(--ease);
}

.crumb a:hover {
  color: var(--accent);
}

.crumb__sep {
  color: var(--line-strong);
}

/* ===== 10 组件 =========================================================== */

/* --- 指标条 --- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.stats > div {
  background: var(--bg-sink);
  padding: clamp(1.75rem, 4vw, 2.75rem) 1.5rem;
  text-align: center;
}

.stats__num {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
  margin-bottom: 0.625rem;
}

.stats__num small {
  font-size: 0.9375rem;
  font-weight: 400;
  margin-left: 0.25rem;
  -webkit-text-fill-color: var(--text-2);
  color: var(--text-2);
}

.stats__label {
  font-size: var(--fs-caption);
  color: var(--text-3);
  letter-spacing: 0.1em;
}

/* --- 标签 / 药丸 --- */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
}

.tag {
  padding: 0.375rem 0.875rem;
  font-size: var(--fs-caption);
  color: var(--text-2);
  border: 1px solid var(--line-strong);
  letter-spacing: 0.06em;
}

.tag--accent {
  color: var(--accent);
  border-color: var(--line-accent);
  background: var(--accent-softer);
}

/* --- 筛选栏 --- */
.filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 3rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--line);
}

.filter__btn {
  padding: 0.625rem 1.375rem;
  font-size: var(--fs-sm);
  letter-spacing: 0.06em;
  color: var(--text-2);
  border: 1px solid var(--line);
  transition: all var(--dur) var(--ease);
}

.filter__btn:hover {
  color: var(--text-1);
  border-color: var(--line-strong);
}

.filter__btn.is-active {
  color: var(--on-accent);
  background: var(--accent);
  border-color: var(--accent);
  font-weight: 600;
}

/* --- 产品卡 --- */
.pcard {
  display: flex;
  flex-direction: column;
  background: var(--bg-raise);
  border: 1px solid var(--line);
  transition: border-color var(--dur) var(--ease),
    transform var(--dur) var(--ease);
  clip-path: polygon(
    var(--bevel) 0,
    100% 0,
    100% calc(100% - var(--bevel)),
    calc(100% - var(--bevel)) 100%,
    0 100%,
    0 var(--bevel)
  );
}

.pcard:hover {
  border-color: var(--line-accent);
  transform: translateY(-4px);
}

.pcard__body {
  padding: 1.5rem 1.5rem 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
  flex: 1;
}

.pcard__cat {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.16em;
  color: var(--accent);
  text-transform: uppercase;
}

.pcard__name {
  font-size: 1.0625rem;
  color: var(--text-1);
  font-weight: 600;
  letter-spacing: 0.04em;
}

.pcard__spec {
  font-size: var(--fs-caption);
  color: var(--text-2);
  line-height: 1.8;
  flex: 1;
}

.pcard__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  margin-top: 0.5rem;
}

.pcard__model {
  font-family: var(--font-mono);
  font-size: var(--fs-caption);
  color: var(--text-3);
}

/* 筛选隐藏态 —— 必须带 !important：
   被筛选的元素自身带 display（.pcard 是 flex、.nitem 是 grid），
   同为单类选择器时由源码顺序决定胜负，不加 !important 会因定义位置不同而时灵时不灵 */
.is-filtered-out {
  display: none !important;
}

/* --- 参数表 --- */
.spec-table th,
.spec-table td {
  text-align: left;
  padding: 0.9375rem 1.25rem;
  border-bottom: 1px solid var(--line);
  font-size: var(--fs-sm);
}

.spec-table th {
  color: var(--text-3);
  font-weight: 400;
  width: 34%;
  background: rgba(255, 255, 255, 0.012);
}

.spec-table td {
  color: var(--text-1);
  font-variant-numeric: tabular-nums;
}

.spec-table tr:last-child th,
.spec-table tr:last-child td {
  border-bottom: 0;
}

/* --- 时间轴 --- */
.timeline {
  position: relative;
  padding-left: 2.5rem;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(
    to bottom,
    var(--accent),
    var(--line-strong) 40%,
    transparent
  );
}

.timeline__item {
  position: relative;
  padding-bottom: 3rem;
}

.timeline__item:last-child {
  padding-bottom: 0;
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: -2.5rem;
  top: 10px;
  width: 15px;
  height: 15px;
  border: 1px solid var(--line-accent);
  background: var(--bg-base);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
}

.timeline__item--now::before {
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.14);
}

.timeline__year {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.06em;
  line-height: 1.4;
}

.timeline__title {
  font-size: 1.0625rem;
  color: var(--text-1);
  font-weight: 600;
  margin-block: 0.375rem 0.625rem;
}

.timeline__text {
  font-size: var(--fs-sm);
  color: var(--text-2);
}

/* --- 流程条 --- */
.flow {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.flow__step {
  background: var(--bg-raise);
  padding: 2rem 1.375rem;
  position: relative;
  transition: background var(--dur) var(--ease);
}

.flow__step:hover {
  background: var(--bg-raise-2);
}

.flow__no {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.07);
  line-height: 1;
  margin-bottom: 1rem;
}

.flow__step:hover .flow__no {
  color: var(--line-accent);
}

.flow__title {
  font-size: 1rem;
  color: var(--text-1);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.flow__text {
  font-size: var(--fs-caption);
  color: var(--text-2);
  line-height: 1.75;
}

/* --- 交错图文（应用领域） --- */
.alt {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
  padding-block: clamp(2.5rem, 5vw, 4rem);
  border-bottom: 1px solid var(--line);
}

.alt:last-child {
  border-bottom: 0;
}

/* 交错方向用显式类控制，不依赖 nth-child —— 区块头也是同级节点，序号会漂移 */
.alt--flip .alt__media {
  order: -1;
}

.alt__no {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  color: var(--text-3);
  margin-bottom: 1rem;
}

.alt__title {
  font-size: 1.625rem;
  margin-bottom: 1rem;
}

.alt__text {
  color: var(--text-2);
  margin-bottom: 1.75rem;
}

/* --- 新闻列表 --- */
.nlist {
  border-top: 1px solid var(--line);
}

.nitem {
  display: grid;
  grid-template-columns: 130px 1fr 200px;
  gap: 2rem;
  align-items: center;
  padding-block: 2rem;
  border-bottom: 1px solid var(--line);
  transition: background var(--dur) var(--ease);
}

.nitem:hover {
  background: rgba(255, 255, 255, 0.014);
}

.nitem__date {
  border-left: 1px solid var(--line-strong);
  padding-left: 1.25rem;
  transition: border-color var(--dur) var(--ease);
}

.nitem:hover .nitem__date {
  border-left-color: var(--accent);
}

.nitem__day {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 600;
  color: var(--text-1);
  line-height: 1.1;
}

.nitem__ym {
  font-family: var(--font-mono);
  font-size: var(--fs-caption);
  color: var(--text-3);
  letter-spacing: 0.1em;
}

.nitem__title {
  font-size: 1.125rem;
  color: var(--text-1);
  font-weight: 600;
  margin-bottom: 0.5rem;
  transition: color var(--dur) var(--ease);
}

.nitem:hover .nitem__title {
  color: var(--accent);
}

.nitem__excerpt {
  font-size: var(--fs-sm);
  color: var(--text-2);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.nitem__thumb {
  aspect-ratio: 16 / 10;
  border: 1px solid var(--line);
  background: linear-gradient(160deg, #121a28, #070b12);
  display: grid;
  place-items: center;
  overflow: hidden;
}

.nitem__thumb svg {
  width: 55%;
  color: var(--accent);
  opacity: 0.55;
  transition: opacity var(--dur) var(--ease), transform 0.7s var(--ease);
}

.nitem:hover .nitem__thumb svg {
  opacity: 0.9;
  transform: scale(1.06);
}

/* --- 分页 --- */
.pager {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 3.5rem;
}

.pager__btn {
  min-width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  padding-inline: 0.875rem;
  border: 1px solid var(--line);
  font-size: var(--fs-sm);
  color: var(--text-2);
  font-variant-numeric: tabular-nums;
  transition: all var(--dur) var(--ease);
}

.pager__btn:hover:not(:disabled) {
  border-color: var(--line-strong);
  color: var(--text-1);
}

.pager__btn.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--on-accent);
  font-weight: 600;
}

.pager__btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

/* --- 文章正文 --- */
.article {
  max-width: var(--maxw-text);
  margin-inline: auto;
}

.article__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  padding-bottom: 1.75rem;
  margin-bottom: 2.5rem;
  border-bottom: 1px solid var(--line);
  font-size: var(--fs-caption);
  color: var(--text-3);
}

.article__body h3 {
  font-size: 1.25rem;
  margin-block: 2.5rem 1rem;
  padding-left: 0.875rem;
  border-left: 2px solid var(--accent);
}

.article__body p {
  margin-bottom: 1.25rem;
  max-width: none;
}

.article__nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-top: 3.5rem;
}

.article__nav a {
  background: var(--bg-raise);
  padding: 1.5rem;
  font-size: var(--fs-sm);
  transition: background var(--dur) var(--ease);
}

.article__nav a:hover {
  background: var(--bg-raise-2);
}

.article__nav span {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.16em;
  color: var(--text-3);
  margin-bottom: 0.5rem;
}

.article__nav a:last-child {
  text-align: right;
}

/* --- 表单 --- */
.form {
  display: grid;
  gap: 1.25rem;
}

.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.field {
  display: grid;
  gap: 0.5rem;
}

.field__label {
  font-size: var(--fs-caption);
  color: var(--text-3);
  letter-spacing: 0.08em;
}

.field__label i {
  color: var(--accent);
  font-style: normal;
  margin-left: 0.25rem;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 0.875rem 1rem;
  background: var(--bg-base);
  border: 1px solid var(--line);
  color: var(--text-1);
  font-size: var(--fs-sm);
  transition: border-color var(--dur) var(--ease),
    background var(--dur) var(--ease);
  border-radius: 0;
  appearance: none;
  -webkit-appearance: none;
}

.field textarea {
  min-height: 140px;
  resize: vertical;
  line-height: 1.8;
}

.field select {
  background-image: linear-gradient(45deg, transparent 50%, #9aa4b2 50%),
    linear-gradient(135deg, #9aa4b2 50%, transparent 50%);
  background-position: calc(100% - 20px) 50%, calc(100% - 14px) 50%;
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
  cursor: pointer;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--bg-raise);
}

.field input::placeholder,
.field textarea::placeholder {
  color: var(--text-3);
}

.field.has-error input,
.field.has-error select,
.field.has-error textarea {
  border-color: #ff6b6b;
}

.field__err {
  font-size: var(--fs-micro);
  color: #ff6b6b;
  min-height: 1em;
  display: none;
}

.field.has-error .field__err {
  display: block;
}

.form__ok {
  display: none;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  border: 1px solid var(--line-accent);
  background: var(--accent-softer);
  color: var(--accent);
  font-size: var(--fs-sm);
}

.form__ok.is-shown {
  display: flex;
}

.form__ok svg {
  width: 18px;
  height: 18px;
  flex: none;
}

/* --- 联系信息卡 --- */
.contact-item {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 1.125rem;
  padding-block: 1.5rem;
  border-bottom: 1px solid var(--line);
}

.contact-item:last-child {
  border-bottom: 0;
}

.contact-item__ico {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  color: var(--accent);
}

.contact-item__ico svg {
  width: 20px;
  height: 20px;
}

.contact-item__label {
  font-size: var(--fs-caption);
  color: var(--text-3);
  letter-spacing: 0.1em;
  margin-bottom: 0.25rem;
}

.contact-item__value {
  color: var(--text-1);
  font-size: 1.0625rem;
  line-height: 1.7;
}

/* --- 地图占位 --- */
.map {
  position: relative;
  aspect-ratio: 21 / 9;
  border: 1px solid var(--line);
  background: linear-gradient(160deg, #0c1220, #050810);
  overflow: hidden;
}

.map svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.map__pin {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -100%);
  text-align: center;
  color: var(--accent);
}

.map__label {
  margin-top: 0.5rem;
  padding: 0.375rem 0.875rem;
  background: rgba(7, 11, 20, 0.92);
  border: 1px solid var(--line-accent);
  font-size: var(--fs-caption);
  color: var(--text-1);
  white-space: nowrap;
}

/* --- CTA 转化条 --- */
.cta {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line-accent);
  background: linear-gradient(
    115deg,
    rgba(12, 110, 158, 0.18),
    rgba(56, 189, 248, 0.04) 55%,
    transparent
  );
  padding: clamp(2.5rem, 6vw, 4.5rem) clamp(1.75rem, 5vw, 4rem);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.cta__title {
  font-size: clamp(1.5rem, 3vw, 2.125rem);
  margin-bottom: 0.875rem;
}

.cta__tel {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-family: var(--font-mono);
  font-size: 1.25rem;
  color: var(--accent);
  letter-spacing: 0.04em;
}

.cta__tel svg {
  width: 20px;
  height: 20px;
  flex: none;
}

/* --- 资质卡 --- */
.cert {
  aspect-ratio: 3 / 4;
  border: 1px solid var(--line);
  background: linear-gradient(160deg, #121a28, #070b12);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 1.5rem;
  text-align: center;
  transition: border-color var(--dur) var(--ease);
}

.cert:hover {
  border-color: var(--line-accent);
}

.cert svg {
  width: 46px;
  height: 46px;
  color: var(--accent);
  opacity: 0.8;
}

.cert__name {
  font-size: var(--fs-sm);
  color: var(--text-1);
  line-height: 1.6;
}

.cert__year {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  color: var(--text-3);
  letter-spacing: 0.14em;
}

/* --- 产品详情图集 --- */
.gallery__stage {
  position: relative;
}

.gallery__stage .shot {
  display: none;
}

.gallery__stage .shot.is-active {
  display: grid;
  animation: shotIn 0.45s var(--ease);
}

@keyframes shotIn {
  from {
    opacity: 0;
    transform: scale(0.985);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.gallery__thumbs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  margin-top: 1rem;
}

.gallery__thumbs .figure {
  cursor: pointer;
  aspect-ratio: 1 / 1;
  transition: border-color var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}

.gallery__thumbs .figure:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}

.gallery__thumbs .figure.is-active {
  border-color: var(--accent);
  background: linear-gradient(160deg, #17253a, #0a0f18);
}

.gallery__thumbs .figure:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* --- 空结果提示 --- */
.empty {
  padding: 4rem 1.5rem;
  text-align: center;
  border: 1px dashed var(--line-strong);
  color: var(--text-3);
  font-size: var(--fs-sm);
}

.empty[hidden] {
  display: none;
}

/* --- 按钮提交中 --- */
.btn.is-loading {
  opacity: 0.7;
  cursor: progress;
}

/* --- 返回顶部 --- */
.backtop {
  position: fixed;
  right: clamp(1rem, 3vw, 2.25rem);
  bottom: clamp(1rem, 3vw, 2.25rem);
  z-index: 90;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  color: var(--text-1);
  background: rgba(14, 20, 32, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--line-strong);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease),
    visibility var(--dur), border-color var(--dur) var(--ease),
    background var(--dur) var(--ease);
  clip-path: polygon(
    9px 0,
    100% 0,
    100% calc(100% - 9px),
    calc(100% - 9px) 100%,
    0 100%,
    0 9px
  );
}

.backtop.is-shown {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.backtop:hover {
  border-color: var(--line-accent);
  background: var(--accent-soft);
  color: var(--accent);
}

.backtop svg {
  width: 19px;
  height: 19px;
}

/* ===== 10B 迅立达专有组件 ================================================ */

/* --- 安全琥珀变体 --- */
.tag--safety {
  color: var(--safety);
  border-color: var(--line-safety);
  background: var(--safety-softer);
}

.eyebrow--safety {
  color: var(--safety);
}

/* --- 数据刻度条 —— 「数据」诉求的主要载体 --- */
.meters {
  display: grid;
  gap: 1.75rem;
}

.meter__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.meter__label {
  font-size: var(--fs-sm);
  color: var(--text-2);
}

.meter__value {
  font-family: var(--font-mono);
  font-size: 1.0625rem;
  color: var(--text-1);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  flex: none;
}

.meter__value small {
  font-size: 0.75rem;
  color: var(--text-3);
  margin-left: 0.25rem;
}

/* 轨道上带刻度线，读起来像量具而不是进度条 */
.meter__track {
  position: relative;
  height: 6px;
  background: var(--bg-sink);
  border: 1px solid var(--line);
  overflow: hidden;
}

.meter__track::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    to right,
    rgba(255, 255, 255, 0.09) 0 1px,
    transparent 1px 10%
  );
  pointer-events: none;
}

.meter__fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-deep), var(--accent));
}

.meter--safety .meter__fill {
  background: linear-gradient(90deg, var(--safety-deep), var(--safety));
}

.meter--safety .meter__value {
  color: var(--safety);
}

/* --- 宽幅 SVG 舞台（试验塔 · 数据拓扑 · 井道剖面） --- */
.stage {
  position: relative;
  border: 1px solid var(--line);
  background: linear-gradient(160deg, #121a28, #070b12);
  overflow: hidden;
  display: grid;
  place-items: center;
  padding: clamp(1.5rem, 4vw, 3rem);
}

.stage::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
      to right,
      var(--rail-line) 0 1px,
      transparent 1px 48px
    ),
    repeating-linear-gradient(
      to bottom,
      var(--floor-line) 0 1px,
      transparent 1px 48px
    );
  pointer-events: none;
}

.stage svg {
  position: relative;
  width: 100%;
  height: auto;
  color: var(--accent);
}

.stage__cap {
  position: absolute;
  left: clamp(1rem, 3vw, 1.75rem);
  bottom: clamp(0.875rem, 3vw, 1.25rem);
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.16em;
  color: var(--text-3);
}

/* --- 能力卡：编号 + 标题 + 参数键值 --- */
.capa {
  position: relative;
  padding: clamp(1.5rem, 3vw, 2.25rem);
  background: var(--bg-raise);
  border: 1px solid var(--line);
  border-top: 2px solid var(--line-accent);
  transition: border-color var(--dur) var(--ease),
    background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.capa:hover {
  background: var(--bg-raise-2);
  border-top-color: var(--accent);
  transform: translateY(-4px);
}

.capa--safety {
  border-top-color: var(--line-safety);
}

.capa--safety:hover {
  border-top-color: var(--safety);
}

.capa__no {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.2em;
  color: var(--text-3);
  margin-bottom: 1rem;
}

.capa__title {
  font-size: 1.125rem;
  color: var(--text-1);
  font-weight: 600;
  margin-bottom: 0.875rem;
}

.capa__text {
  font-size: var(--fs-sm);
  line-height: 1.85;
  margin-bottom: 1.5rem;
}

/* 参数键值表：科技感来自等宽数字 + 细分隔线 */
.kv {
  display: grid;
  gap: 0;
  font-size: var(--fs-caption);
}

.kv > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.625rem;
  border-top: 1px solid var(--line);
}

.kv dt {
  color: var(--text-3);
  flex: none;
}

.kv dd {
  margin: 0;
  color: var(--text-1);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.kv--plain dd {
  font-family: var(--font-sans);
}

/* --- 安全链：带方向的五段流程，比 .flow 更强调「链」 --- */
.chain {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1rem;
}

.chain__node {
  position: relative;
  padding: 1.75rem 1.25rem;
  background: var(--bg-raise);
  border: 1px solid var(--line);
  transition: border-color var(--dur) var(--ease),
    background var(--dur) var(--ease);
}

.chain__node:hover {
  border-color: var(--line-safety);
  background: var(--bg-raise-2);
}

/* 节点之间的箭头连接线 */
.chain__node:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 50%;
  right: calc(-1rem - 1px);
  width: 1rem;
  height: 1px;
  background: var(--line-strong);
}

.chain__ico {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-safety);
  color: var(--safety);
  margin-bottom: 1.125rem;
}

.chain__ico svg {
  width: 20px;
  height: 20px;
}

.chain__step {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.18em;
  color: var(--text-3);
  margin-bottom: 0.5rem;
}

.chain__title {
  font-size: 1rem;
  color: var(--text-1);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.chain__text {
  font-size: var(--fs-caption);
  line-height: 1.75;
}

/* --- 团队卡 --- */
.member {
  display: flex;
  flex-direction: column;
  background: var(--bg-raise);
  border: 1px solid var(--line);
  transition: border-color var(--dur) var(--ease),
    transform var(--dur) var(--ease);
  clip-path: polygon(
    var(--bevel) 0,
    100% 0,
    100% calc(100% - var(--bevel)),
    calc(100% - var(--bevel)) 100%,
    0 100%,
    0 var(--bevel)
  );
}

.member:hover {
  border-color: var(--line-accent);
  transform: translateY(-4px);
}

/* 头像位：无实拍照时用姓氏首字 + 井道线框衬底 */
.member__avatar {
  position: relative;
  aspect-ratio: 4 / 3;
  background: linear-gradient(160deg, #121a28, #070b12);
  display: grid;
  place-items: center;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.member__avatar::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
      to right,
      var(--rail-line) 0 1px,
      transparent 1px 28px
    ),
    repeating-linear-gradient(
      to bottom,
      var(--floor-line) 0 1px,
      transparent 1px 28px
    );
}

.member__initial {
  position: relative;
  font-size: clamp(2.5rem, 6vw, 3.5rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1;
}

.member__body {
  padding: 1.5rem 1.5rem 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
  flex: 1;
}

.member__name {
  font-size: 1.25rem;
  color: var(--text-1);
  font-weight: 600;
  letter-spacing: 0.06em;
}

.member__role {
  font-size: var(--fs-caption);
  color: var(--accent);
  letter-spacing: 0.1em;
}

.member__bio {
  font-size: var(--fs-sm);
  color: var(--text-2);
  line-height: 1.85;
}

/* --- 工程案例卡 --- */
.ccard {
  display: flex;
  flex-direction: column;
  background: var(--bg-raise);
  border: 1px solid var(--line);
  transition: border-color var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}

.ccard:hover {
  border-color: var(--line-accent);
  transform: translateY(-4px);
}

.ccard__media {
  position: relative;
  aspect-ratio: 16 / 10;
  background: linear-gradient(160deg, #121a28, #070b12);
  display: grid;
  place-items: center;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.ccard__media::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
      to right,
      var(--rail-line) 0 1px,
      transparent 1px 32px
    ),
    repeating-linear-gradient(
      to bottom,
      var(--floor-line) 0 1px,
      transparent 1px 32px
    );
}

.ccard__media svg {
  position: relative;
  width: 58%;
  color: var(--accent);
  opacity: 0.8;
  transition: transform 0.7s var(--ease), opacity var(--dur) var(--ease);
}

.ccard:hover .ccard__media svg {
  transform: scale(1.06);
  opacity: 1;
}

/* 左上角的场景标签 */
.ccard__badge {
  position: absolute;
  top: 0;
  left: 0;
  padding: 0.375rem 0.875rem;
  background: rgba(7, 11, 20, 0.85);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  font-size: var(--fs-micro);
  letter-spacing: 0.14em;
  color: var(--accent);
}

.ccard__body {
  padding: 1.375rem 1.5rem 1.625rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex: 1;
}

.ccard__name {
  font-size: 1.0625rem;
  color: var(--text-1);
  font-weight: 600;
  line-height: 1.5;
}

.ccard__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem 1.25rem;
  font-size: var(--fs-caption);
  color: var(--text-3);
  margin-top: auto;
  padding-top: 0.875rem;
  border-top: 1px solid var(--line);
}

.ccard__meta b {
  color: var(--text-2);
  font-weight: 400;
  font-family: var(--font-mono);
}

/* --- 荣誉横条 --- */
.honors {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.honor {
  background: var(--bg-raise);
  padding: clamp(1.5rem, 3vw, 2.25rem) 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
  transition: background var(--dur) var(--ease);
}

.honor:hover {
  background: var(--bg-raise-2);
}

.honor svg {
  width: 30px;
  height: 30px;
  color: var(--safety);
  opacity: 0.9;
}

.honor__name {
  font-size: var(--fs-sm);
  color: var(--text-1);
  font-weight: 600;
  line-height: 1.6;
}

.honor__note {
  font-size: var(--fs-caption);
  color: var(--text-3);
  line-height: 1.7;
}

/* --- 加盟步骤（带序号连接线） --- */
.steps {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  grid-template-columns: repeat(3, 1fr);
}

.step {
  background: var(--bg-raise);
  padding: clamp(1.5rem, 3vw, 2.25rem);
  transition: background var(--dur) var(--ease);
}

.step:hover {
  background: var(--bg-raise-2);
}

.step__no {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 1rem;
}

.step__title {
  font-size: 1.0625rem;
  color: var(--text-1);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.step__text {
  font-size: var(--fs-sm);
  line-height: 1.8;
}

/* --- 提示条（数据口径说明 / 备注） --- */
.note {
  display: flex;
  gap: 0.875rem;
  padding: 1rem 1.25rem;
  border: 1px solid var(--line);
  border-left: 2px solid var(--line-accent);
  background: var(--accent-softer);
  font-size: var(--fs-caption);
  color: var(--text-2);
  line-height: 1.8;
}

.note svg {
  width: 17px;
  height: 17px;
  flex: none;
  color: var(--accent);
  margin-top: 0.25rem;
}

.note--safety {
  border-left-color: var(--line-safety);
  background: var(--safety-softer);
}

.note--safety svg {
  color: var(--safety);
}

/* --- 真实照片 ---------------------------------------------------------
   原官网的实拍照片是白天现场光，直接贴进深底页面会发白发跳。
   统一压一点亮度与饱和、加 1px 描边和顶部暗角，让它们和线框图共处一套画面；
   悬停时恢复原色，等于「看清楚」这个动作。                              */
.photo {
  position: relative;
  margin: 0;
  overflow: hidden;
  background: var(--bg-sink);
  border: 1px solid var(--line);
  clip-path: polygon(
    var(--bevel) 0,
    100% 0,
    100% calc(100% - var(--bevel)),
    calc(100% - var(--bevel)) 100%,
    0 100%,
    0 var(--bevel)
  );
}

.photo img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.86) contrast(1.04) brightness(0.86);
  transition: filter 0.6s var(--ease), transform 0.9s var(--ease);
}

.photo::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(
    180deg,
    rgba(7, 11, 20, 0.34),
    rgba(7, 11, 20, 0.04) 42%,
    rgba(7, 11, 20, 0.42)
  );
  transition: opacity var(--dur) var(--ease);
}

.photo:hover img,
a:hover > .photo img,
.ccard:hover .photo img {
  filter: saturate(1) contrast(1) brightness(1);
  transform: scale(1.03);
}

.photo:hover::after {
  opacity: 0.45;
}

/* 产品卡的图形位换成真实照片：撑满切角外框，沿用 .photo 的滤镜手法 */
.figure--photo {
  padding: 0;
}

.figure--photo::before {
  display: none;
}

.figure--photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.88) contrast(1.03) brightness(0.88);
  transition: filter 0.6s var(--ease), transform 0.9s var(--ease);
}

.pcard:hover .figure--photo img,
.figure--photo:hover img {
  filter: none;
  transform: scale(1.04);
}

/* 案例卡与新闻缩略图的照片 */
.ccard__media img {
  position: relative;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.04) brightness(0.85);
  transition: filter 0.6s var(--ease), transform 0.9s var(--ease);
}

.ccard:hover .ccard__media img {
  filter: none;
  transform: scale(1.05);
}

/* 常用比例 */
.photo--wide {
  aspect-ratio: 16 / 10;
}
.photo--sq {
  aspect-ratio: 1 / 1;
}
.photo--tall {
  aspect-ratio: 3 / 4;
}

/* 图注 */
.photo__cap {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 1;
  padding: 0.5rem 0.875rem;
  background: rgba(4, 7, 14, 0.82);
  border-top: 1px solid var(--line);
  border-right: 1px solid var(--line);
  font-size: var(--fs-micro);
  letter-spacing: 0.1em;
  color: var(--text-2);
}

/* 正文里的图注段落 */
.article__cap {
  text-align: center;
  font-size: var(--fs-caption);
  color: var(--text-3);
  margin-top: -0.5rem;
  margin-bottom: 1.75rem;
}

.article__body .photo {
  margin-block: 1.75rem;
}

/* 新闻列表缩略图换成真实照片后，图和 SVG 兜底共用同一个位子 */
.nitem__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.82) brightness(0.82) contrast(1.05);
  transition: filter var(--dur) var(--ease), transform 0.7s var(--ease);
}

.nitem:hover .nitem__thumb img {
  filter: none;
  transform: scale(1.05);
}

/* --- 证书墙 ------------------------------------------------------------
   证书是白纸，在深底上必须收着放：默认压暗、悬停还原并浮起。            */
.certwall {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.cert-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-raise);
  border: 1px solid var(--line);
  transition: border-color var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}

.cert-card:hover {
  border-color: var(--line-safety);
  transform: translateY(-4px);
}

.cert-card__shot {
  position: relative;
  aspect-ratio: 3 / 4;
  overflow: hidden;
  background: #0a0f18;
  border-bottom: 1px solid var(--line);
}

.cert-card__shot img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: brightness(0.8) saturate(0.9);
  transition: filter var(--dur) var(--ease);
}

.cert-card:hover .cert-card__shot img {
  filter: none;
}

.cert-card__body {
  padding: 1rem 1.125rem 1.25rem;
}

.cert-card__name {
  font-size: var(--fs-sm);
  color: var(--text-1);
  font-weight: 600;
  line-height: 1.6;
  margin-bottom: 0.25rem;
}

.cert-card__note {
  font-size: var(--fs-micro);
  color: var(--text-3);
  letter-spacing: 0.06em;
}

/* --- 图文交错块内的要点清单 --- */
.ticks {
  display: grid;
  gap: 0.875rem;
  margin-bottom: 1.75rem;
}

.ticks li {
  display: grid;
  grid-template-columns: 18px 1fr;
  gap: 0.75rem;
  font-size: var(--fs-sm);
  color: var(--text-2);
  line-height: 1.8;
}

.ticks svg {
  width: 18px;
  height: 18px;
  color: var(--accent);
  margin-top: 0.375rem;
}

/* ===== 11 滚动揭示 ======================================================= */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  /* 井道光点靠动画才成立，静止时是一根突兀的短线，直接撤掉 */
  .bg-shaft__car,
  .bg-scan,
  .scroll-hint {
    display: none;
  }

  /* Hero 核心装置：动画停掉但图形保留（静止状态本身也是完整构图）。
     轿厢要归到井道中部，否则停在往复动画的起始位（偏下 66px）会看着像掉下去了。 */
  .car-run {
    transform: translateY(0);
  }

  .floor-lamp,
  .load-bar,
  .node-pulse {
    opacity: 0.85;
  }
}

/* ===== 12 响应式 ========================================================= */

@media (max-width: 1080px) {
  .nav__links,
  .nav__cta {
    display: none;
  }

  .burger {
    display: grid;
  }

  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .flow {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem 2rem;
  }

  .honors {
    grid-template-columns: repeat(2, 1fr);
  }

  .certwall {
    grid-template-columns: repeat(3, 1fr);
  }

  /* 安全链塌成两列后，横向箭头会指进换行处的空白，直接撤掉 */
  .chain {
    grid-template-columns: repeat(2, 1fr);
  }

  .chain__node:not(:last-child)::after {
    display: none;
  }
}

@media (max-width: 860px) {
  .grid--3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .alt {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .alt--flip .alt__media {
    order: 0;
  }

  .nitem {
    grid-template-columns: 100px 1fr;
    gap: 1.5rem;
  }

  .nitem__thumb {
    display: none;
  }

  /* 窄屏：Hero 转单列，核心装置移到文字下方并缩小 */
  .hero__inner {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .hero__stage {
    order: 1;
    max-width: 440px;
    margin-inline: auto;
  }

  .hero {
    min-height: auto;
    padding-top: 8rem;
  }

  .scroll-hint {
    display: none;
  }

  .steps {
    grid-template-columns: 1fr;
  }

  .certwall {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  :root {
    --bevel: 10px;
  }

  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }

  .hero__meta {
    grid-template-columns: 1fr;
  }

  .stats {
    grid-template-columns: 1fr;
  }

  .flow {
    grid-template-columns: 1fr;
  }

  .footer__grid {
    grid-template-columns: 1fr;
  }

  .form__row {
    grid-template-columns: 1fr;
  }

  .article__nav {
    grid-template-columns: 1fr;
  }

  .article__nav a:last-child {
    text-align: left;
  }

  .nitem {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .nitem__date {
    display: flex;
    align-items: baseline;
    gap: 0.75rem;
  }

  .nitem__day {
    font-size: 1.375rem;
  }

  .timeline {
    padding-left: 1.75rem;
  }

  .timeline__item::before {
    left: -1.75rem;
  }

  .cta {
    flex-direction: column;
    align-items: flex-start;
  }

  .logo__name {
    font-size: 0.9375rem;
  }

  .honors,
  .chain {
    grid-template-columns: 1fr;
  }

  .certwall {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
  }

  .kv > div {
    /* 窄屏下键值同行会把长值挤成竖排，改为上下两行 */
    flex-direction: column;
    gap: 0.125rem;
  }

  .kv dd {
    text-align: left;
  }
}