/* 恒仁新材料 — 官网样式 */
:root {
  --ink: #0e242c;
  --ink-soft: #1a3a45;
  --steel: #2c5f6e;
  --accent: #c4783a;
  --accent-deep: #a35f28;
  --mist: #e6eef1;
  --paper: #f4f8f9;
  --white: #ffffff;
  --line: rgba(14, 36, 44, 0.12);
  --shadow: 0 18px 48px rgba(14, 36, 44, 0.12);
  --radius: 2px;
  --font-display: "Noto Serif SC", "Songti SC", serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --max: 1120px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.7;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

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

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

ul {
  list-style: none;
}

.container {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
}

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

.site-header.is-scrolled {
  background: rgba(14, 36, 44, 0.94);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  line-height: 0;
}

.logo img {
  height: 48px;
  width: auto;
  display: block;
  background: transparent;
  padding: 0;
}

.logo span {
  display: none;
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  transition: color 0.25s;
}

.nav-links a:hover,
.nav-links a.is-active {
  color: var(--white);
}

.nav-links .btn-nav {
  border: 1px solid rgba(255, 255, 255, 0.35);
  padding: 0.45rem 1.1rem;
  color: var(--white);
  transition: background 0.25s, border-color 0.25s;
}

.nav-links .btn-nav:hover {
  background: var(--accent);
  border-color: var(--accent);
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 0;
  background: transparent;
  cursor: pointer;
  position: relative;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--white);
  position: absolute;
  left: 9px;
  transition: transform 0.3s var(--ease);
}

.nav-toggle span {
  top: 19px;
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  left: 0;
}

.nav-toggle span::before {
  top: -7px;
}

.nav-toggle span::after {
  top: 7px;
}

.nav-toggle.is-open span {
  background: transparent;
}

.nav-toggle.is-open span::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle.is-open span::after {
  top: 0;
  transform: rotate(-45deg);
}

/* —— Hero —— */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  color: var(--white);
  background: var(--ink);
}

.hero-visual {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.hero-bg {
  position: absolute;
  inset: -4%;
  background:
    linear-gradient(105deg, rgba(14, 36, 44, 0.86) 0%, rgba(14, 36, 44, 0.48) 48%, rgba(14, 36, 44, 0.22) 100%),
    linear-gradient(180deg, transparent 32%, rgba(14, 36, 44, 0.88) 100%),
    url("../images/hero-bg.jpg") center / cover no-repeat;
  animation: hero-ken 28s ease-in-out infinite alternate;
  will-change: transform;
}

.hero-glow {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 50% 42% at 72% 38%, rgba(44, 95, 110, 0.35) 0%, transparent 60%),
    radial-gradient(ellipse 36% 32% at 82% 68%, rgba(196, 120, 58, 0.22) 0%, transparent 55%),
    radial-gradient(ellipse 40% 30% at 18% 70%, rgba(36, 120, 140, 0.18) 0%, transparent 50%);
  animation: hero-glow-shift 12s ease-in-out infinite alternate;
}

.hero-grid {
  position: absolute;
  inset: -10%;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 75% 65% at 60% 40%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 75% 65% at 60% 40%, #000 20%, transparent 75%);
  animation: hero-grid-drift 40s linear infinite;
  opacity: 0.55;
}

.hero-scan {
  position: absolute;
  left: 0;
  right: 0;
  height: 28%;
  top: -30%;
  background: linear-gradient(
    180deg,
    transparent 0%,
    rgba(90, 180, 200, 0.03) 40%,
    rgba(90, 180, 200, 0.1) 50%,
    rgba(90, 180, 200, 0.03) 60%,
    transparent 100%
  );
  animation: hero-scan 7.5s ease-in-out infinite;
}

.hero-beams {
  position: absolute;
  inset: 0;
}

.hero-beams span {
  position: absolute;
  width: 1px;
  height: 140%;
  top: -20%;
  background: linear-gradient(
    180deg,
    transparent 0%,
    rgba(196, 120, 58, 0.35) 45%,
    rgba(90, 180, 200, 0.25) 55%,
    transparent 100%
  );
  opacity: 0;
  filter: blur(0.5px);
  animation: hero-beam 9s ease-in-out infinite;
}

.hero-beams span:nth-child(1) {
  left: 58%;
  transform: rotate(18deg);
  animation-delay: 0s;
}

.hero-beams span:nth-child(2) {
  left: 72%;
  transform: rotate(-12deg);
  animation-delay: 3s;
  animation-duration: 11s;
}

.hero-beams span:nth-child(3) {
  left: 84%;
  transform: rotate(8deg);
  animation-delay: 5.5s;
  animation-duration: 10s;
}

.hero-particles {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.85;
}

.hero-vignette {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 90% 80% at 50% 45%, transparent 35%, rgba(14, 36, 44, 0.45) 100%),
    linear-gradient(90deg, rgba(14, 36, 44, 0.55) 0%, transparent 35%);
}

@keyframes hero-ken {
  from { transform: scale(1.05) translate(0, 0); }
  to { transform: scale(1.14) translate(-1.8%, -1%); }
}

@keyframes hero-glow-shift {
  from {
    opacity: 0.75;
    transform: scale(1) translate(0, 0);
  }
  to {
    opacity: 1;
    transform: scale(1.08) translate(-2%, 1.5%);
  }
}

@keyframes hero-grid-drift {
  from { transform: translate(0, 0); }
  to { transform: translate(-64px, -64px); }
}

@keyframes hero-scan {
  0% { top: -30%; opacity: 0; }
  12% { opacity: 1; }
  88% { opacity: 1; }
  100% { top: 105%; opacity: 0; }
}

@keyframes hero-beam {
  0%, 100% { opacity: 0; }
  20% { opacity: 0.55; }
  50% { opacity: 0.15; }
  70% { opacity: 0.45; }
}

@keyframes pulse-glow {
  from { opacity: 0.65; transform: scale(1) rotate(0deg); }
  to { opacity: 0.95; transform: scale(1.04) rotate(3deg); }
}

@keyframes drift {
  from { transform: translateX(0); }
  to { transform: translateX(-48px); }
}

@media (prefers-reduced-motion: reduce) {
  .hero-bg,
  .hero-glow,
  .hero-grid,
  .hero-scan,
  .hero-beams span {
    animation: none !important;
  }

  .hero-particles {
    display: none;
  }
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: 0 0 5.5rem;
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
}

.hero-brand {
  margin-bottom: 1.25rem;
  opacity: 0;
  animation: rise 0.9s var(--ease) 0.15s forwards;
}

.hero-brand img {
  height: clamp(88px, 16vw, 128px);
  width: auto;
  display: block;
  background: #fff;
  padding: 8px 14px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
}

.hero-headline {
  font-size: clamp(1.15rem, 2.4vw, 1.55rem);
  font-weight: 400;
  letter-spacing: 0.08em;
  max-width: 28em;
  margin-bottom: 0.85rem;
  color: rgba(255, 255, 255, 0.92);
  opacity: 0;
  animation: rise 0.9s var(--ease) 0.35s forwards;
}

.hero-lead {
  font-size: 0.98rem;
  color: rgba(255, 255, 255, 0.68);
  max-width: 32em;
  margin-bottom: 2.25rem;
  opacity: 0;
  animation: rise 0.9s var(--ease) 0.5s forwards;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  opacity: 0;
  animation: rise 0.9s var(--ease) 0.65s forwards;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.75rem;
  font-size: 0.92rem;
  letter-spacing: 0.06em;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.3s, color 0.3s, border-color 0.3s, transform 0.3s;
}

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

.btn-primary {
  background: var(--accent);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--accent-deep);
}

.btn-ghost {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.4);
  color: var(--white);
}

.btn-ghost:hover {
  border-color: var(--white);
  background: rgba(255, 255, 255, 0.08);
}

.btn-dark {
  background: var(--ink);
  color: var(--white);
}

.btn-dark:hover {
  background: var(--ink-soft);
}

.hero-scroll {
  position: absolute;
  bottom: 1.75rem;
  right: max(1.25rem, calc((100% - var(--max)) / 2));
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: rgba(255, 255, 255, 0.5);
  writing-mode: vertical-rl;
  opacity: 0;
  animation: rise 0.9s var(--ease) 1s forwards;
}

.hero-scroll::after {
  content: "";
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0.5), transparent);
  animation: scroll-line 2s ease-in-out infinite;
}

@keyframes scroll-line {
  0%, 100% { opacity: 0.3; transform: scaleY(0.7); }
  50% { opacity: 1; transform: scaleY(1); }
}

/* —— Sections —— */
.section {
  padding: 5.5rem 0;
}

.section-label {
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  color: var(--accent);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.5vw, 2.35rem);
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.3;
  margin-bottom: 1rem;
}

.section-desc {
  color: var(--steel);
  max-width: 36em;
  font-size: 1rem;
}

.section-head {
  margin-bottom: 3rem;
}

.section-head.center {
  text-align: center;
  margin-inline: auto;
}

.section-head.center .section-desc {
  margin-inline: auto;
}

/* —— About strip —— */
.about-strip {
  background: var(--white);
  position: relative;
  overflow: hidden;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: 3.5rem;
  align-items: center;
  position: relative;
}

.about-media {
  position: relative;
  overflow: hidden;
  min-height: 420px;
}

.about-media img {
  width: 100%;
  height: 100%;
  min-height: 420px;
  object-fit: cover;
  display: block;
}

.about-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(14, 36, 44, 0.55) 100%);
  pointer-events: none;
}

.about-media-caption {
  position: absolute;
  left: 1.25rem;
  bottom: 1.25rem;
  z-index: 1;
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
}

.about-aside {
  color: var(--ink);
  padding: 0;
  position: relative;
  z-index: 1;
}

.about-aside .section-label {
  color: var(--accent);
}

.about-aside .section-title {
  color: var(--ink);
}

.about-aside > p {
  color: var(--steel);
  margin-top: 1rem;
  max-width: 28em;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
}

.stat strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.85rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.2;
  color: var(--ink);
}

.stat span {
  font-size: 0.8rem;
  color: var(--steel);
  letter-spacing: 0.06em;
}

.about-body p + p {
  margin-top: 1rem;
}

.about-body p {
  color: var(--ink-soft);
}

.about-highlights {
  margin-top: 2rem;
  display: grid;
  gap: 1rem;
}

.highlight {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: start;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
}

.highlight-num {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--accent);
  letter-spacing: 0.04em;
}

.highlight h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
  letter-spacing: 0.04em;
}

.highlight p {
  font-size: 0.9rem;
  color: var(--steel);
}

/* —— Product categories —— */
.products-section {
  background:
    linear-gradient(180deg, var(--paper) 0%, var(--mist) 100%);
}

.category-list {
  display: grid;
  gap: 1.25rem;
}

.category {
  display: grid;
  grid-template-columns: 220px 1fr;
  background: var(--white);
  border-left: 3px solid var(--accent);
  overflow: hidden;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.category:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow);
}

.category-media {
  position: relative;
  min-height: 180px;
  overflow: hidden;
}

.category-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.7s var(--ease);
}

.category:hover .category-media img {
  transform: scale(1.06);
}

.category-body {
  padding: 1.75rem 1.75rem 1.75rem 2rem;
}

.category-top {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1.15rem;
}

.category h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: 0.08em;
  font-weight: 700;
}

.category-tag {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--steel);
  text-transform: uppercase;
}

.product-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.product-tags li {
  font-size: 0.88rem;
  padding: 0.35rem 0.85rem;
  background: var(--paper);
  border: 1px solid var(--line);
  color: var(--ink-soft);
  letter-spacing: 0.02em;
  transition: background 0.25s, border-color 0.25s, color 0.25s;
}

.category:hover .product-tags li {
  border-color: rgba(196, 120, 58, 0.35);
}

.product-tags li:hover {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--white);
}

/* —— Applications —— */
.apps-section {
  background: var(--ink);
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.apps-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 10% 80%, rgba(44, 95, 110, 0.35) 0%, transparent 60%),
    radial-gradient(ellipse 40% 40% at 90% 20%, rgba(196, 120, 58, 0.18) 0%, transparent 50%);
  pointer-events: none;
}

.apps-section .section-label {
  color: rgba(196, 120, 58, 0.9);
}

.apps-section .section-desc {
  color: rgba(255, 255, 255, 0.6);
}

.apps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  position: relative;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.app-item {
  padding: 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  border-right: 1px solid rgba(255, 255, 255, 0.12);
  transition: background 0.35s;
  overflow: hidden;
}

.app-item:nth-child(3n) {
  border-right: 0;
}

.app-item:hover {
  background: rgba(255, 255, 255, 0.04);
}

.app-media {
  height: 160px;
  overflow: hidden;
  position: relative;
}

.app-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.7s var(--ease);
  filter: saturate(0.85) brightness(0.78);
}

.app-item:hover .app-media img {
  transform: scale(1.06);
  filter: saturate(0.95) brightness(0.88);
}

.app-body {
  padding: 1.5rem 1.75rem 2rem;
}

.app-item h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: 0.08em;
  margin-bottom: 0.65rem;
}

.app-item p {
  font-size: 0.92rem;
  color: rgba(255, 255, 255, 0.58);
  line-height: 1.65;
}

.app-icon {
  display: none;
}

/* —— Why us —— */
.why-section {
  background: var(--white);
}

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

.why-item {
  padding-top: 1.5rem;
  border-top: 2px solid var(--ink);
  transition: border-color 0.3s;
}

.why-item:hover {
  border-color: var(--accent);
}

.why-item h3 {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  margin: 1rem 0 0.5rem;
}

.why-item p {
  font-size: 0.9rem;
  color: var(--steel);
}

.why-item .idx {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--accent);
  letter-spacing: 0.1em;
}

/* —— Cases —— */
.cases-section {
  background: var(--white);
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.case-card {
  position: relative;
  display: block;
  min-height: 280px;
  overflow: hidden;
  color: var(--white);
  isolation: isolate;
}

.case-card img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s var(--ease);
  z-index: -2;
}

.case-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(14, 36, 44, 0.15) 0%, rgba(14, 36, 44, 0.82) 70%, rgba(14, 36, 44, 0.94) 100%);
  z-index: -1;
  transition: background 0.4s;
}

.case-card:hover img {
  transform: scale(1.06);
}

.case-card:hover::before {
  background: linear-gradient(180deg, rgba(14, 36, 44, 0.1) 0%, rgba(14, 36, 44, 0.75) 65%, rgba(14, 36, 44, 0.92) 100%);
}

.case-card-body {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 1.5rem 1.6rem 1.6rem;
}

.case-tag {
  display: inline-block;
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 0.55rem;
  border-left: 2px solid var(--accent);
  padding-left: 0.55rem;
}

.case-card h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: 0.06em;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.case-card p {
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.68);
  line-height: 1.6;
  margin-bottom: 1rem;
  max-width: 34em;
}

.case-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 1.1rem;
}

.case-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  color: var(--white);
  border-bottom: 1px solid rgba(196, 120, 58, 0.7);
  padding-bottom: 0.15rem;
  transition: color 0.25s, border-color 0.25s;
}

.case-card:hover .case-link {
  color: #e8b07a;
  border-color: #e8b07a;
}

.wechat-card {
  background: rgba(255, 255, 255, 0.97);
  color: var(--ink);
  padding: 1.35rem 1.25rem 1.25rem;
  text-align: center;
  margin-bottom: 1.15rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.wechat-card-label {
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--steel);
  margin-bottom: 0.85rem;
}

.wechat-card-label strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: 0.1em;
  color: var(--ink);
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.wechat-qr {
  width: 168px;
  height: 168px;
  margin: 0 auto 0.75rem;
  background: #fff;
  padding: 6px;
  box-shadow: 0 8px 24px rgba(14, 36, 44, 0.12);
}

.wechat-qr img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.wechat-card-tip {
  font-size: 0.82rem;
  color: var(--steel);
  letter-spacing: 0.04em;
  line-height: 1.5;
}

.contact-hotline {
  display: grid;
  gap: 1rem;
  margin-top: 0.5rem;
}

/* Floating WeChat */
.float-wechat {
  position: fixed;
  right: 1.25rem;
  bottom: 1.5rem;
  z-index: 120;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.float-wechat-panel {
  position: absolute;
  right: calc(100% + 0.75rem);
  bottom: 0;
  width: 196px;
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  padding: 1rem 0.9rem 0.95rem;
  text-align: center;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateX(8px);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease), visibility 0.3s;
}

.float-wechat.is-open .float-wechat-panel {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(0);
}

.float-wechat-panel h4 {
  font-family: var(--font-display);
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  margin-bottom: 0.65rem;
  color: var(--ink);
}

.float-wechat-panel .wechat-qr {
  width: 148px;
  height: 148px;
  margin-bottom: 0.55rem;
}

.float-wechat-panel p {
  font-size: 0.75rem;
  color: var(--steel);
  letter-spacing: 0.04em;
}

.float-wechat-btn {
  width: 56px;
  height: 56px;
  padding: 0;
  border: 0;
  outline: none;
  cursor: pointer;
  background: transparent;
  box-shadow: none;
  display: grid;
  place-items: center;
  transition: transform 0.25s;
}

.float-wechat-btn:hover,
.float-wechat-btn:focus {
  background: transparent;
  box-shadow: none;
  outline: none;
  transform: translateY(-2px);
}

.float-wechat-btn svg {
  width: 48px;
  height: 48px;
  display: block;
}

/* Back to top */
.back-to-top {
  position: fixed;
  right: 1.25rem;
  bottom: 5.75rem;
  z-index: 121;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid rgba(14, 36, 44, 0.18);
  background: rgba(255, 255, 255, 0.92);
  color: var(--ink);
  cursor: pointer;
  display: grid;
  place-items: center;
  box-shadow: 0 8px 24px rgba(14, 36, 44, 0.12);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease), visibility 0.3s, background 0.25s, border-color 0.25s;
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--white);
}

.back-to-top svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.hotline-item {
  display: block;
  padding: 1rem 1.15rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  transition: background 0.25s, border-color 0.25s;
}

.hotline-item:hover {
  background: rgba(196, 120, 58, 0.18);
  border-color: rgba(196, 120, 58, 0.55);
}

.hotline-item span {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: rgba(255, 255, 255, 0.45);
  margin-bottom: 0.3rem;
}

.hotline-item strong {
  font-size: 1.15rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--white);
}

.contact-row dd a {
  color: inherit;
  border-bottom: 1px solid rgba(255, 255, 255, 0.25);
  transition: border-color 0.25s, color 0.25s;
}

.contact-row dd a:hover {
  color: #e8b07a;
  border-color: #e8b07a;
}

.footer-contact {
  margin-top: 1.1rem;
  display: grid;
  gap: 0.4rem;
  font-size: 0.88rem;
}

.footer-contact a:hover {
  color: var(--white);
}

/* —— Contact / CTA —— */
.contact-section {
  position: relative;
  background:
    linear-gradient(120deg, var(--ink) 0%, var(--ink-soft) 55%, #245060 100%);
  color: var(--white);
  overflow: hidden;
}

.contact-section::after {
  content: "";
  position: absolute;
  width: 420px;
  height: 420px;
  right: -80px;
  bottom: -120px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 50%;
  animation: pulse-glow 10s ease-in-out infinite alternate;
}

.contact-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 3.5rem;
  position: relative;
  z-index: 1;
}

.contact-section .section-label {
  color: rgba(255, 255, 255, 0.5);
}

.contact-section .section-desc {
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 2rem;
}

.contact-details {
  display: grid;
  gap: 1.35rem;
}

.contact-row dt {
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: rgba(255, 255, 255, 0.45);
  margin-bottom: 0.3rem;
}

.contact-row dd {
  font-size: 1.02rem;
  letter-spacing: 0.02em;
  line-height: 1.55;
}

.contact-panel {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 2.25rem;
  align-self: center;
}

.contact-panel h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: 0.08em;
  margin-bottom: 0.75rem;
}

.contact-panel p {
  color: rgba(255, 255, 255, 0.65);
  font-size: 0.92rem;
  margin-bottom: 1.75rem;
}

.map-note {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.45);
  line-height: 1.6;
}

/* —— Page hero (inner pages) —— */
.page-hero {
  position: relative;
  padding: 9rem 0 4rem;
  background:
    linear-gradient(135deg, var(--ink) 0%, var(--ink-soft) 60%, #245060 100%);
  color: var(--white);
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(
      -18deg,
      transparent,
      transparent 48px,
      rgba(255, 255, 255, 0.02) 48px,
      rgba(255, 255, 255, 0.02) 49px
    );
}

.page-hero .container {
  position: relative;
  z-index: 1;
}

.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.75rem);
  letter-spacing: 0.1em;
  margin-bottom: 0.75rem;
}

.page-hero p {
  color: rgba(255, 255, 255, 0.65);
  max-width: 32em;
}

.breadcrumb {
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.45);
  margin-bottom: 1.25rem;
}

.breadcrumb a:hover {
  color: var(--white);
}

/* —— Footer —— */
.site-footer {
  background: #0a1c22;
  color: rgba(255, 255, 255, 0.55);
  padding: 3rem 0 1.75rem;
  font-size: 0.88rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand {
  margin-bottom: 0.85rem;
  line-height: 0;
}

.footer-brand img {
  height: 72px;
  width: auto;
  display: block;
  background: #fff;
  padding: 6px 10px;
}

.footer-brand + p {
  line-height: 1.7;
  max-width: 26em;
}

.footer-col h4 {
  color: var(--white);
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  margin-bottom: 1rem;
  font-weight: 500;
}

.footer-col ul {
  display: grid;
  gap: 0.55rem;
}

.footer-col a:hover {
  color: var(--white);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem;
  font-size: 0.8rem;
}

/* —— Reveal on scroll —— */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* —— Products page detail —— */
.product-block {
  margin-bottom: 3rem;
}

.product-block-media {
  margin-bottom: 1.5rem;
  height: 220px;
  overflow: hidden;
  position: relative;
}

.product-block-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-block-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(14, 36, 44, 0.35), transparent 55%);
}

.about-hero-media {
  margin-top: 2rem;
  overflow: hidden;
  max-width: 720px;
}

.about-hero-media img {
  width: 100%;
  height: 320px;
  object-fit: cover;
}

.page-hero.has-image {
  background:
    linear-gradient(135deg, rgba(14, 36, 44, 0.88) 0%, rgba(26, 58, 69, 0.72) 60%, rgba(36, 80, 96, 0.65) 100%),
    url("../images/hero-bg.jpg") center / cover no-repeat;
}

.product-block:last-child {
  margin-bottom: 0;
}

.product-block-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line);
}

.product-block-head h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  letter-spacing: 0.08em;
}

.product-block-head span {
  font-size: 0.8rem;
  color: var(--steel);
  letter-spacing: 0.1em;
}

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

.product-table th,
.product-table td {
  text-align: left;
  padding: 0.95rem 1rem;
  border-bottom: 1px solid var(--line);
  font-size: 0.92rem;
}

.product-table th {
  background: var(--mist);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.product-table tr:hover td {
  background: rgba(230, 238, 241, 0.5);
}

.product-table td:first-child {
  font-weight: 500;
  color: var(--ink);
}

.product-table td:nth-child(2) {
  color: var(--steel);
}

/* —— About page —— */
.about-page-content {
  display: grid;
  gap: 2.5rem;
}

.prose {
  max-width: 48em;
}

.prose p + p {
  margin-top: 1.1rem;
}

.prose p {
  color: var(--ink-soft);
  font-size: 1.02rem;
}

.values-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 1rem;
}

.value-box {
  padding: 1.75rem;
  background: var(--paper);
  border-top: 3px solid var(--accent);
}

.value-box h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: 0.06em;
  margin-bottom: 0.6rem;
}

.value-box p {
  font-size: 0.9rem;
  color: var(--steel);
}

/* —— Responsive —— */
@media (max-width: 960px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .about-media,
  .about-media img {
    min-height: 280px;
  }

  .about-aside {
    padding: 0;
  }

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

  .category-media {
    min-height: 200px;
    max-height: 220px;
  }

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

  .app-item {
    border-right: 0;
  }

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

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

  .case-card {
    min-height: 260px;
  }

  .contact-inner {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

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

  .values-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .logo img {
    height: 40px;
  }

  .float-wechat {
    right: 0.85rem;
    bottom: 1rem;
  }

  .back-to-top {
    right: 0.85rem;
    bottom: 5.25rem;
    width: 40px;
    height: 40px;
  }

  .float-wechat-panel {
    width: 176px;
  }

  .wechat-qr {
    width: 150px;
    height: 150px;
  }

  .nav-toggle {
    display: block;
  }

  .nav-links {
    position: fixed;
    inset: 72px 0 auto;
    background: rgba(14, 36, 44, 0.98);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 1rem 1.5rem 1.5rem;
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.35s var(--ease), opacity 0.35s;
  }

  .nav-links.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-links a {
    padding: 0.85rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .nav-links .btn-nav {
    margin-top: 0.75rem;
    text-align: center;
    border-bottom: 0;
  }

  .hero-content {
    padding-bottom: 4.5rem;
  }

  .hero-scroll {
    display: none;
  }

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

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

  .section {
    padding: 4rem 0;
  }

  .product-table th:nth-child(3),
  .product-table td:nth-child(3) {
    display: none;
  }
}