/* ============================================================
   Zhengzhou Huiying Kiln Technology Co., Ltd.
   Heavy-industry export style: graphite black + amber/steel + glass
   ============================================================ */

:root {
  --bg-0: #08090B;
  --bg-1: #0E1115;
  --bg-2: #12161B;
  --surface: rgba(255, 255, 255, 0.045);
  --surface-strong: rgba(255, 255, 255, 0.07);
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.16);
  --primary: #F5A623;
  --cyan: #FF7A18;
  --cyan-light: #FFC37A;
  --text: #EDF0F4;
  --text-dim: #AAB2BF;
  --text-faint: #6F7887;
  --danger: #FF6B6B;
  --grad-main: linear-gradient(135deg, #F5A623 0%, #FF6B00 100%);
  --radius: 18px;
  --shadow-glow: 0 14px 44px rgba(245, 166, 35, 0.30);
  --font: "Inter", "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  --font-display: "Barlow Condensed", "Oswald", "Inter", "Segoe UI", sans-serif;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 86px;
}

body {
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 85% -10%, rgba(245, 166, 35, 0.10), transparent 60%),
    radial-gradient(1000px 500px at -10% 30%, rgba(255, 122, 24, 0.06), transparent 55%),
    var(--bg-1);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

button {
  font-family: inherit;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- 按钮 ---------- */

.btn {
  display: inline-block;
  padding: 13px 32px;
  border-radius: 999px;
  font-size: 15.5px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  text-align: center;
  transition: transform 0.22s ease, box-shadow 0.22s ease, background 0.22s ease, border-color 0.22s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--grad-main);
  color: #fff;
  box-shadow: 0 10px 28px rgba(245, 166, 35, 0.35);
}

.btn-primary:hover {
  box-shadow: 0 14px 36px rgba(255, 122, 24, 0.45);
}

.btn-ghost {
  border-color: rgba(255, 255, 255, 0.35);
  color: #fff;
  background: rgba(255, 255, 255, 0.04);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 195, 122, 0.6);
}

.btn-accent {
  background: var(--grad-main);
  color: #fff;
  box-shadow: 0 10px 28px rgba(245, 166, 35, 0.35);
}

.btn-accent:hover {
  box-shadow: 0 14px 36px rgba(255, 122, 24, 0.45);
}

.btn-block {
  width: 100%;
}

/* ---------- 顶部导航 ---------- */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background: rgba(8, 9, 11, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: background 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.site-header.scrolled {
  background: rgba(8, 9, 11, 0.92);
  border-color: var(--border);
  box-shadow: 0 10px 34px rgba(0, 0, 0, 0.35);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  height: 78px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-logo-wrap {
  flex: none;
  background: #fff;
  padding: 4px;
  border-radius: 12px;
  box-shadow: 0 0 0 1px rgba(245, 166, 35, 0.35), 0 6px 18px rgba(0, 0, 0, 0.35);
}

.brand-logo {
  height: 42px;
  width: auto;
  border-radius: 8px;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
  min-width: 0;
}

.brand-text strong {
  font-size: 16.5px;
  color: #fff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.brand-text small {
  font-size: 10px;
  color: var(--cyan-light);
  letter-spacing: 1.8px;
  white-space: nowrap;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.main-nav a {
  font-size: 14.5px;
  color: var(--text-dim);
  font-weight: 500;
  position: relative;
  transition: color 0.2s ease;
  white-space: nowrap;
}

.main-nav a:not(.nav-cta)::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--grad-main);
  transition: width 0.25s ease;
}

.main-nav a:hover,
.main-nav a.active {
  color: #fff;
}

.main-nav a:hover::after,
.main-nav a.active::after {
  width: 100%;
}

.main-nav .nav-cta {
  background: var(--grad-main);
  color: #fff;
  padding: 9px 22px;
  border-radius: 999px;
  box-shadow: 0 6px 20px rgba(245, 166, 35, 0.35);
}

.main-nav .nav-cta:hover {
  color: #fff;
  box-shadow: 0 8px 26px rgba(255, 122, 24, 0.45);
}

.main-nav .nav-cta::after {
  display: none;
}

/* ---------- 语言切换 ---------- */

.lang-switch {
  display: flex;
  align-items: center;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  padding: 3px;
  background: rgba(255, 255, 255, 0.04);
  flex: none;
}

.lang-btn {
  border: none;
  background: transparent;
  color: var(--text-dim);
  font-size: 12.5px;
  font-weight: 600;
  padding: 5px 11px;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
}

.lang-btn:hover {
  color: #fff;
}

.lang-btn.active {
  background: var(--grad-main);
  color: #fff;
  box-shadow: 0 4px 14px rgba(245, 166, 35, 0.4);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex: none;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- 首屏 ---------- */

.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  color: #fff;
  overflow: hidden;
  padding: 150px 0 90px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url("../assets/images/factory/0acff814b0be676ea3efdad4eb418d1d.jpg");
  background-size: cover;
  background-position: center;
  will-change: transform;
}

.hero-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    115deg,
    rgba(8, 9, 11, 0.97) 0%,
    rgba(16, 20, 26, 0.90) 45%,
    rgba(18, 22, 28, 0.78) 100%
  );
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 195, 122, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 195, 122, 0.07) 1px, transparent 1px);
  background-size: 52px 52px;
  mask-image: radial-gradient(ellipse at 28% 38%, #000 25%, transparent 72%);
  -webkit-mask-image: radial-gradient(ellipse at 28% 38%, #000 25%, transparent 72%);
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  pointer-events: none;
  z-index: 1;
}

.hero-glow-a {
  width: 46vw;
  height: 46vw;
  left: -12%;
  top: -18%;
  background: radial-gradient(circle, rgba(245, 166, 35, 0.35), transparent 65%);
}

.hero-glow-b {
  width: 40vw;
  height: 40vw;
  right: -10%;
  bottom: -16%;
  background: radial-gradient(circle, rgba(255, 122, 24, 0.28), transparent 65%);
}

.hero-content {
  position: relative;
  z-index: 3;
  width: 100%;
}

.hero-eyebrow {
  display: inline-block;
  padding: 7px 18px;
  border: 1px solid rgba(255, 122, 24, 0.45);
  border-radius: 999px;
  font-size: 14px;
  letter-spacing: 1.5px;
  margin-bottom: 26px;
  color: var(--cyan-light);
  background: rgba(255, 122, 24, 0.08);
  box-shadow: 0 0 24px rgba(255, 122, 24, 0.12) inset;
}

.hero-title {
  font-size: clamp(34px, 5.6vw, 56px);
  line-height: 1.28;
  font-weight: 800;
  letter-spacing: 1px;
  margin-bottom: 24px;
  text-shadow: 0 6px 30px rgba(0, 0, 0, 0.4);
}

.hero-title-accent {
  background: linear-gradient(92deg, #FFC37A 0%, #FF7A18 45%, #F5A623 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-typing {
  font-size: clamp(16px, 2.2vw, 21px);
  color: #FFE0B0;
  font-weight: 600;
  letter-spacing: 1px;
  min-height: 2em;
  margin-bottom: 14px;
}

.caret {
  display: inline-block;
  width: 2px;
  height: 1.05em;
  background: var(--cyan);
  vertical-align: -0.15em;
  margin-left: 4px;
  animation: blink 0.85s steps(1) infinite;
  box-shadow: 0 0 8px rgba(255, 122, 24, 0.8);
}

@keyframes blink {
  50% { opacity: 0; }
}

.hero-sub {
  font-size: clamp(14.5px, 1.9vw, 18px);
  color: rgba(237, 240, 244, 0.82);
  max-width: 760px;
  line-height: 1.85;
}

.hero-sub-2 {
  color: rgba(170, 178, 191, 0.92);
  margin-bottom: 40px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 64px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 780px;
  border-top: 1px solid rgba(255, 195, 122, 0.22);
  padding-top: 28px;
}

.hero-stats div {
  display: flex;
  flex-direction: column;
}

.hero-stats strong {
  font-size: 30px;
  line-height: 1.2;
  background: linear-gradient(120deg, #FFC37A, #FF7A18);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-variant-numeric: tabular-nums;
}

.hero-stats span {
  font-size: 13px;
  color: rgba(170, 178, 191, 0.85);
  margin-top: 4px;
}

/* ---------- 业绩滚动条 ---------- */

.marquee {
  background: rgba(255, 255, 255, 0.025);
  border-top: 1px solid rgba(245, 166, 35, 0.18);
  border-bottom: 1px solid rgba(245, 166, 35, 0.18);
  overflow: hidden;
  padding: 15px 0;
  position: relative;
}

.marquee::before,
.marquee::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  width: 90px;
  z-index: 2;
  pointer-events: none;
}

.marquee::before {
  left: 0;
  background: linear-gradient(90deg, var(--bg-1), transparent);
}

.marquee::after {
  right: 0;
  background: linear-gradient(-90deg, var(--bg-1), transparent);
}

.marquee-track {
  display: flex;
  align-items: center;
  gap: 46px;
  width: max-content;
  animation: marquee 32s linear infinite;
}

.marquee:hover .marquee-track {
  animation-play-state: paused;
}

.marquee-track span {
  color: #FFE0B0;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 1.5px;
  white-space: nowrap;
}

.marquee-track i {
  color: var(--cyan);
  font-style: normal;
  font-size: 13px;
  text-shadow: 0 0 10px rgba(255, 122, 24, 0.8);
}

@keyframes marquee {
  to { transform: translateX(-50%); }
}

/* ---------- 通用区块 ---------- */

.section {
  padding: 100px 0;
  position: relative;
}

.section-alt {
  background:
    radial-gradient(900px 420px at 10% 0%, rgba(245, 166, 35, 0.08), transparent 60%),
    var(--bg-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-dark {
  background:
    radial-gradient(1100px 520px at 80% 0%, rgba(245, 166, 35, 0.14), transparent 60%),
    radial-gradient(900px 500px at 0% 100%, rgba(255, 122, 24, 0.10), transparent 55%),
    linear-gradient(160deg, #11161D 0%, #1A2028 60%, #11161D 100%);
  color: #fff;
}

.section-head {
  text-align: center;
  margin-bottom: 56px;
}

.section-head h2 {
  font-size: clamp(28px, 4vw, 38px);
  color: #fff;
  font-weight: 800;
  position: relative;
  display: inline-block;
  padding-bottom: 16px;
  letter-spacing: 1px;
}

.section-head h2::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 58px;
  height: 4px;
  border-radius: 4px;
  background: var(--grad-main);
  box-shadow: 0 0 14px rgba(255, 122, 24, 0.6);
}

.section-head p {
  margin-top: 16px;
  color: var(--text-dim);
  font-size: 15.5px;
}

.section-head.left {
  text-align: left;
}

.section-head.left h2::after {
  left: 0;
  transform: none;
}

.section-head.light p {
  color: rgba(194, 202, 214, 0.8);
}

/* ---------- 玻璃拟态卡片 ---------- */

.glass-card {
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

/* ---------- 产品中心 ---------- */

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(262px, 1fr));
  gap: 26px;
}

.product-card {
  position: relative;
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.product-card:hover {
  transform: translateY(-8px);
  border-color: rgba(255, 122, 24, 0.4);
  box-shadow: var(--shadow-glow);
}

.product-card::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(115deg, transparent 30%, rgba(255, 255, 255, 0.14) 48%, transparent 62%);
  transform: translateX(-130%);
  transition: transform 0.7s ease;
  z-index: 3;
}

.product-card:hover::after {
  transform: translateX(130%);
}

.card-media {
  position: relative;
  height: 210px;
  overflow: hidden;
  background: var(--bg-2);
}

.card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.product-card:hover .card-media img {
  transform: scale(1.07);
}

.card-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2;
  background: var(--grad-main);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 5px 13px;
  border-radius: 999px;
  box-shadow: 0 6px 18px rgba(245, 166, 35, 0.5);
  letter-spacing: 1px;
}

.card-body {
  padding: 24px;
}

.card-body h3 {
  font-size: 19px;
  color: #fff;
  margin-bottom: 10px;
}

.card-body > p {
  color: var(--text-dim);
  font-size: 14px;
  margin-bottom: 16px;
  line-height: 1.8;
}

.card-body ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.card-body ul li {
  font-size: 12.5px;
  color: var(--cyan-light);
  background: rgba(245, 166, 35, 0.12);
  border: 1px solid rgba(245, 166, 35, 0.28);
  border-radius: 999px;
  padding: 4px 12px;
}

/* ---------- 实拍展示 ---------- */

.gallery-grid {
  columns: 3;
  column-gap: 16px;
}

.gallery-grid figure {
  break-inside: avoid;
  margin: 0 0 16px;
  border-radius: 14px;
  overflow: hidden;
  position: relative;
  cursor: zoom-in;
  border: 1px solid var(--border);
  background: var(--bg-2);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.gallery-grid figure:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 122, 24, 0.4);
  box-shadow: 0 18px 44px rgba(245, 166, 35, 0.22);
}

.gallery-grid img {
  width: 100%;
  display: block;
  transition: transform 0.5s ease;
}

.gallery-grid figure:hover img {
  transform: scale(1.06);
}

.gallery-grid figure::after {
  content: "＋";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 44px;
  font-weight: 300;
  color: #fff;
  background: rgba(8, 9, 11, 0.45);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.gallery-grid figure:hover::after {
  opacity: 1;
}

/* ---------- 关于我们 ---------- */

.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 56px;
  align-items: center;
}

.about-copy .section-head {
  margin-bottom: 26px;
}

.about-text {
  margin-bottom: 18px;
  font-size: 15px;
  color: var(--text-dim);
  line-height: 1.9;
}

.about-list {
  margin: 26px 0 32px;
}

.about-list li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 11px;
  color: var(--text);
  font-size: 14.5px;
}

.about-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--cyan);
  font-weight: 700;
  text-shadow: 0 0 10px rgba(255, 122, 24, 0.7);
}

.about-card {
  background: linear-gradient(160deg, rgba(245, 166, 35, 0.16), rgba(255, 122, 24, 0.06));
  border: 1px solid rgba(255, 122, 24, 0.28);
  border-radius: 24px;
  padding: 38px;
  color: #fff;
  box-shadow: var(--shadow-glow);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.about-card-inner h3 {
  font-size: 20px;
  margin-bottom: 22px;
  line-height: 1.5;
}

.ac-label {
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--cyan-light);
  margin: 16px 0 5px;
  font-weight: 600;
}

.about-card-inner p:not(.ac-label) {
  color: rgba(237, 240, 244, 0.92);
  font-size: 14.5px;
}

/* ---------- 工程业绩 ---------- */

.project-stats {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 18px;
}

.project-stat {
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 16px;
  padding: 28px 12px;
  text-align: center;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.project-stat:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 122, 24, 0.45);
  box-shadow: 0 14px 36px rgba(245, 166, 35, 0.25);
}

.project-stat strong {
  display: block;
  font-size: 33px;
  line-height: 1.2;
  background: linear-gradient(120deg, #FFC37A, #FF7A18);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-variant-numeric: tabular-nums;
}

.project-stat span {
  color: rgba(194, 202, 214, 0.8);
  font-size: 13.5px;
}

.project-note {
  margin-top: 36px;
  text-align: center;
  color: rgba(194, 202, 214, 0.72);
  font-size: 14px;
  line-height: 1.95;
  max-width: 920px;
  margin-left: auto;
  margin-right: auto;
}

/* ---------- 核心优势 ---------- */

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

.advantage-card {
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 26px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.advantage-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255, 122, 24, 0.4);
  box-shadow: var(--shadow-glow);
}

.adv-icon {
  width: 54px;
  height: 54px;
  border-radius: 14px;
  background: var(--grad-main);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  box-shadow: 0 8px 22px rgba(245, 166, 35, 0.4);
}

.adv-icon svg {
  width: 26px;
  height: 26px;
}

.advantage-card h3 {
  color: #fff;
  font-size: 18px;
  margin-bottom: 10px;
}

.advantage-card p {
  font-size: 13.5px;
  color: var(--text-dim);
  line-height: 1.85;
}

/* ---------- 联系我们 ---------- */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}

.contact-list {
  margin-top: 12px;
}

.contact-list li {
  padding: 17px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  flex-direction: column;
}

.contact-label {
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--cyan-light);
  font-weight: 600;
  margin-bottom: 5px;
}

.contact-list a,
.contact-list span:last-child {
  font-size: 16.5px;
  color: #fff;
  font-weight: 500;
}

.contact-list a:hover {
  color: var(--cyan-light);
}

.contact-form {
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
  border: 1px solid rgba(255, 122, 24, 0.22);
  border-radius: 24px;
  padding: 36px;
  color: var(--text);
  box-shadow: var(--shadow-glow);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.contact-form h3 {
  color: #fff;
  font-size: 22px;
  margin-bottom: 24px;
}

.form-row {
  margin-bottom: 16px;
}

.form-row label {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}

.req-star {
  color: var(--danger);
  font-style: normal;
  font-size: 14px;
  margin-left: 2px;
}

.form-row input,
.form-row select,
.form-row textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 10px;
  font-size: 15px;
  font-family: inherit;
  color: var(--text);
  background: rgba(255, 255, 255, 0.055);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.form-row select option {
  background: var(--bg-2);
  color: var(--text);
}

.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(255, 122, 24, 0.16);
  background: rgba(255, 255, 255, 0.08);
}

.form-row textarea {
  resize: vertical;
}

/* ---------- 页脚 ---------- */

.site-footer {
  background: var(--bg-0);
  color: rgba(237, 240, 244, 0.75);
  padding: 56px 0 26px;
  border-top: 1px solid rgba(245, 166, 35, 0.25);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  flex-wrap: wrap;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

.footer-inner > div:first-child > p:nth-child(2) {
  color: var(--text-dim);
  font-size: 14px;
}

.footer-contact {
  margin-top: 12px;
  color: var(--text-faint);
  font-size: 13.5px;
  line-height: 1.9;
}

.footer-links {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-dim);
  font-size: 14px;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: var(--cyan-light);
}

.footer-bottom {
  padding-top: 24px;
  font-size: 13px;
  color: var(--text-faint);
}

/* ---------- 滚动显现动画 ---------- */

.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

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

.hero-content .reveal:nth-child(1) { transition-delay: 0.05s; }
.hero-content .reveal:nth-child(2) { transition-delay: 0.18s; }
.hero-content .reveal:nth-child(3) { transition-delay: 0.30s; }
.hero-content .reveal:nth-child(4) { transition-delay: 0.42s; }
.hero-content .reveal:nth-child(5) { transition-delay: 0.54s; }
.hero-content .reveal:nth-child(6) { transition-delay: 0.66s; }

.product-grid > .reveal:nth-child(2),
.advantage-grid > .reveal:nth-child(2) { transition-delay: 0.08s; }

.product-grid > .reveal:nth-child(3),
.advantage-grid > .reveal:nth-child(3) { transition-delay: 0.16s; }

.product-grid > .reveal:nth-child(4),
.advantage-grid > .reveal:nth-child(4) { transition-delay: 0.24s; }

/* ---------- Toast 提示 ---------- */

.toast {
  position: fixed;
  left: 50%;
  bottom: 42px;
  transform: translateX(-50%) translateY(20px);
  background: rgba(15, 18, 23, 0.95);
  border: 1px solid rgba(255, 122, 24, 0.35);
  color: #fff;
  padding: 14px 28px;
  border-radius: 14px;
  font-size: 14.5px;
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
  z-index: 400;
  max-width: 90vw;
  text-align: center;
  line-height: 1.7;
}

.toast.show {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* ---------- 顶部滚动进度条 ---------- */

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, #FF7A18, #F5A623, #FFC37A);
  z-index: 500;
  border-radius: 0 3px 3px 0;
  box-shadow: 0 0 12px rgba(255, 122, 24, 0.7);
}

/* ---------- 首屏粒子动效 ---------- */

.hero-particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 2;
}

.hero-particle {
  position: absolute;
  bottom: -14px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 122, 24, 0.9) 0%, rgba(255, 122, 24, 0) 70%);
  animation: floatUp linear infinite;
}

@keyframes floatUp {
  0%   { transform: translateY(0) translateX(0); opacity: 0; }
  10%  { opacity: 0.85; }
  85%  { opacity: 0.55; }
  100% { transform: translateY(-105vh) translateX(26px); opacity: 0; }
}

/* ---------- 图片灯箱 ---------- */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 500;
  background: rgba(5, 6, 8, 0.95);
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  padding: 24px;
}

.lightbox.open {
  display: flex;
  animation: fadeIn 0.25s ease;
}

.lightbox img {
  max-width: min(92vw, 1100px);
  max-height: 82vh;
  border-radius: 12px;
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.lightbox-close {
  position: absolute;
  top: 18px;
  right: 26px;
  font-size: 42px;
  line-height: 1;
  color: #fff;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  transition: color 0.2s ease, transform 0.2s ease;
}

.lightbox-close:hover {
  color: var(--cyan);
  transform: rotate(90deg);
}

.lightbox-caption {
  color: rgba(237, 240, 244, 0.8);
  margin-top: 16px;
  font-size: 15px;
  letter-spacing: 1px;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* ---------- 一键拨号按钮 ---------- */

.fab-phone {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 300;
}

.fab-phone a {
  position: relative;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--grad-main);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 12px 30px rgba(245, 166, 35, 0.5);
  transition: transform 0.25s ease;
}

.fab-phone a:hover {
  transform: scale(1.08);
}

.fab-phone svg {
  width: 26px;
  height: 26px;
}

.fab-phone a::after {
  content: "";
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 2px solid rgba(255, 122, 24, 0.6);
  animation: pulse 2s ease-out infinite;
}

@keyframes pulse {
  0%   { transform: scale(0.88); opacity: 1; }
  100% { transform: scale(1.45); opacity: 0; }
}

/* ---------- 返回顶部按钮 ---------- */

.back-top {
  position: fixed;
  right: 28px;
  bottom: 94px;
  z-index: 300;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(15, 18, 23, 0.85);
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease, background 0.3s ease;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.4);
}

.back-top.show {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.back-top:hover {
  background: var(--grad-main);
}

.back-top svg {
  width: 20px;
  height: 20px;
}

/* ---------- 响应式 ---------- */

@media (max-width: 992px) {
  .gallery-grid {
    columns: 2;
  }

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

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

  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 44px;
  }
}

@media (max-width: 768px) {
  html {
    scroll-padding-top: 74px;
  }

  .section {
    padding: 76px 0;
  }

  .header-inner {
    height: 70px;
  }

  .brand-text small {
    display: none;
  }

  .brand-text strong {
    font-size: 15px;
  }

  .nav-toggle {
    display: flex;
  }

  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(8, 9, 11, 0.97);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 14px 24px 24px;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 24px 50px rgba(0, 0, 0, 0.5);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease;
  }

  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .main-nav a {
    padding: 13px 4px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.07);
    color: var(--text-dim);
  }

  .main-nav a:last-child {
    border-bottom: none;
  }

  .main-nav .nav-cta {
    text-align: center;
    margin-top: 12px;
  }

  .hero {
    min-height: auto;
    padding: 128px 0 72px;
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 26px;
  }

  .gallery-grid {
    columns: 1;
  }

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

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

  .hero-actions .btn {
    flex: 1;
    min-width: 150px;
  }

  .contact-form {
    padding: 28px 22px;
  }
}

@media (max-width: 480px) {
  .lang-btn {
    padding: 4px 8px;
    font-size: 11.5px;
  }

  .brand-logo {
    height: 36px;
  }

  .hero-actions .btn {
    min-width: 100%;
  }
}

/* ---------- 无障碍：减少动态效果 ---------- */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ============================================================
   3D 产品模型板块
   ============================================================ */

.model3d-wrap {
  border: 1px solid var(--border-strong);
  border-radius: calc(var(--radius) + 4px);
  background:
    radial-gradient(900px 420px at 15% 0%, rgba(245, 166, 35, 0.10), transparent 60%),
    var(--surface);
  box-shadow: var(--shadow-glow);
  overflow: hidden;
}

.model3d-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
}

.model3d-tab {
  appearance: none;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.2;
  padding: 10px 18px;
  border-radius: 999px;
  cursor: pointer;
  transition: color 0.25s, border-color 0.25s, background 0.25s, box-shadow 0.25s;
}

.model3d-tab:hover {
  color: var(--text);
  border-color: rgba(255, 122, 24, 0.55);
}

.model3d-tab.active {
  color: #0B0E12;
  font-weight: 600;
  border-color: transparent;
  background: var(--grad-main);
  box-shadow: 0 6px 18px rgba(245, 166, 35, 0.35);
}

.model3d-panel[hidden] {
  display: none;
}

.model3d-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
}

.model3d-modes,
.model3d-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.model3d-btn {
  appearance: none;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text-dim);
  font-size: 13px;
  line-height: 1;
  padding: 9px 14px;
  border-radius: 999px;
  cursor: pointer;
  transition: color 0.25s, border-color 0.25s, background 0.25s, box-shadow 0.25s;
  white-space: nowrap;
}

.model3d-btn:hover {
  color: var(--text);
  border-color: rgba(255, 122, 24, 0.55);
}

.model3d-btn.active {
  color: #0B0E12;
  font-weight: 600;
  border-color: transparent;
  background: var(--grad-main);
  box-shadow: 0 6px 18px rgba(245, 166, 35, 0.35);
}

.model3d-stage {
  position: relative;
  height: 500px;
  overflow: hidden;
  background:
    radial-gradient(1000px 460px at 70% 20%, rgba(255, 122, 24, 0.08), transparent 60%),
    radial-gradient(800px 400px at 10% 90%, rgba(245, 166, 35, 0.08), transparent 55%),
    #0A0D11;
}

.model3d-canvas {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
  cursor: grab;
}

.model3d-canvas:active {
  cursor: grabbing;
}

.model3d-dots {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
}

.model3d-dot {
  position: absolute;
  left: 0;
  top: 0;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  border: 2px solid rgba(255, 122, 24, 0.9);
  background: rgba(255, 122, 24, 0.22);
  box-shadow: 0 0 0 3px rgba(255, 122, 24, 0.18), 0 0 14px rgba(255, 122, 24, 0.65);
  cursor: pointer;
  pointer-events: auto;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
  animation: model3dPulse 2.2s ease-in-out infinite;
}

.model3d-dot.inner {
  border-color: rgba(255, 170, 60, 0.95);
  background: rgba(255, 170, 60, 0.25);
  box-shadow: 0 0 0 3px rgba(255, 170, 60, 0.18), 0 0 14px rgba(255, 170, 60, 0.6);
}

.model3d-dot:hover,
.model3d-dot.active {
  transform: translate(-50%, -50%) scale(1.45);
  border-color: #ffffff;
  box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.25), 0 0 20px rgba(255, 122, 24, 0.9);
}

@keyframes model3dPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.55; }
}

.model3d-loading {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  z-index: 2;
  color: var(--text-dim);
  font-size: 14px;
}

.model3d-hint {
  position: absolute;
  left: 50%;
  bottom: 14px;
  transform: translateX(-50%);
  z-index: 2;
  margin: 0;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(8, 11, 15, 0.72);
  border: 1px solid var(--border);
  color: var(--text-faint);
  font-size: 12px;
  white-space: nowrap;
  pointer-events: none;
  backdrop-filter: blur(6px);
}

.model3d-fallback {
  padding: 70px 28px;
  text-align: center;
  color: var(--text-dim);
  line-height: 1.8;
}

.model3d-bottom {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 380px;
  gap: 14px;
  padding: 16px;
  border-top: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
}

.model3d-legend {
  display: flex;
  flex-wrap: wrap;
  align-content: flex-start;
  gap: 8px;
}

.model3d-legend-title {
  width: 100%;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 2px;
}

.model3d-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  appearance: none;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-dim);
  font-size: 12.5px;
  padding: 7px 12px;
  border-radius: 999px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.model3d-chip.inner {
  border-style: dashed;
}

.model3d-chip:hover,
.model3d-chip.active {
  color: var(--text);
  border-color: rgba(255, 122, 24, 0.6);
  background: rgba(255, 122, 24, 0.09);
}

.model3d-chip.active {
  box-shadow: 0 0 0 1px rgba(255, 122, 24, 0.35) inset;
}

.chip-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 8px rgba(255, 122, 24, 0.8);
  flex: none;
}

.model3d-chip.inner .chip-dot {
  background: #ffaa3c;
  box-shadow: 0 0 8px rgba(255, 170, 60, 0.8);
}

.model3d-info {
  border: 1px solid var(--border);
  border-left: 3px solid var(--cyan);
  border-radius: 14px;
  padding: 14px 16px;
  background: var(--surface-strong);
  min-height: 118px;
}

.model3d-info-label {
  display: block;
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 4px;
}

.model3d-info h4 {
  font-size: 16px;
  color: var(--cyan-light);
  margin-bottom: 6px;
}

.model3d-info p {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.75;
  margin: 0;
}

@media (max-width: 960px) {
  .model3d-stage {
    height: 400px;
  }

  .model3d-bottom {
    grid-template-columns: 1fr;
  }

  .model3d-hint {
    white-space: normal;
    width: auto;
    max-width: calc(100% - 32px);
    text-align: center;
  }
}

@media (max-width: 560px) {
  .model3d-toolbar {
    justify-content: center;
  }

  .model3d-stage {
    height: 320px;
  }

  .model3d-btn {
    font-size: 12px;
    padding: 8px 11px;
  }
}

/* ============================================================
   Heavy-industry visual polish
   ============================================================ */

body {
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    radial-gradient(1200px 600px at 85% -10%, rgba(245, 166, 35, 0.10), transparent 60%),
    radial-gradient(1000px 500px at -10% 30%, rgba(255, 122, 24, 0.06), transparent 55%),
    var(--bg-1);
  background-size: 48px 48px, 48px 48px, auto, auto, auto;
  background-repeat: repeat, repeat, no-repeat, no-repeat, no-repeat;
}

.brand-text strong,
.hero-title,
.section-head h2,
.card-body h3,
.advantage-card h3,
.about-card-inner h3,
.contact-form h3,
.footer-brand,
.project-stat strong,
.hero-stats strong {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.section-head h2 {
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.brand-text small,
.ac-label,
.contact-label,
.model3d-legend-title,
.model3d-info-label {
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.btn {
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.hero-eyebrow {
  text-transform: uppercase;
}

.site-header {
  border-bottom: 1px solid rgba(245, 166, 35, 0.16);
}

.card-body ul li,
.model3d-chip,
.model3d-btn,
.model3d-tab {
  letter-spacing: 0.02em;
}

.section-alt::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    135deg,
    rgba(245, 166, 35, 0.018) 0px,
    rgba(245, 166, 35, 0.018) 2px,
    transparent 2px,
    transparent 14px
  );
  opacity: 0.45;
}

/* Arabic right-to-left layout */

[dir="rtl"] body {
  text-align: right;
}

[dir="rtl"] .section-head.left {
  text-align: right;
}

[dir="rtl"] .section-head.left h2::after {
  left: auto;
  right: 0;
  transform: none;
}

[dir="rtl"] .about-list li {
  padding-left: 0;
  padding-right: 28px;
}

[dir="rtl"] .about-list li::before {
  left: auto;
  right: 0;
}

[dir="rtl"] .form-row input,
[dir="rtl"] .form-row select,
[dir="rtl"] .form-row textarea {
  text-align: right;
}

[dir="rtl"] .fab-phone,
[dir="rtl"] .back-top {
  right: auto;
  left: 22px;
}

[dir="rtl"] .back-top {
  left: 28px;
}

[dir="rtl"] .lightbox-close {
  right: auto;
  left: 26px;
}

[dir="rtl"] .scroll-progress {
  left: auto;
  right: 0;
}

[dir="rtl"] .marquee-track {
  animation-direction: reverse;
}