/* 无锡伟风智能科技有限公司 — 全局样式 */

:root {
  --color-ink: #0c1624;
  --color-ink-soft: #3a4658;
  --color-navy: #0a2744;
  --color-navy-deep: #06182c;
  --color-steel: #1e4d73;
  --color-accent: #0d8f9f;
  --color-accent-bright: #12b5c8;
  --color-amber: #c4782a;
  --color-surface: #ffffff;
  --color-surface-muted: #f3f6f9;
  --color-line: #e2e8ef;
  --color-line-strong: #c5d0dc;
  --font-display: "Sora", "Noto Sans SC", sans-serif;
  --font-body: "Noto Sans SC", "Sora", sans-serif;
  --container: 1180px;
  --header-h: 72px;
  --radius: 6px;
  --shadow-soft: 0 12px 40px rgba(10, 39, 68, 0.08);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.75;
  color: var(--color-ink);
  background: var(--color-surface);
  -webkit-font-smoothing: antialiased;
}

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

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

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

button {
  font: inherit;
  border: none;
  background: none;
  cursor: pointer;
}

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

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

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.site-header.is-scrolled {
  border-bottom-color: var(--color-line);
  box-shadow: 0 4px 24px rgba(6, 24, 44, 0.06);
}

.site-header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

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

.brand__logo {
  height: 44px;
  width: auto;
  display: block;
}

.footer-brand .brand__logo {
  height: 40px;
  background: #fff;
  padding: 6px 12px;
  border-radius: 6px;
}

.brand__mark {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
}

.brand__text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand__name {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--color-navy);
  line-height: 1.2;
}

.brand__tag {
  font-size: 11px;
  color: var(--color-ink-soft);
  letter-spacing: 0.04em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav__link {
  position: relative;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-ink-soft);
  padding: 8px 0;
  transition: color 0.25s var(--ease);
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}

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

.nav__link.is-active::after,
.nav__link:hover::after {
  transform: scaleX(1);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.lang-switch {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-ink-soft);
  letter-spacing: 0.04em;
}

.lang-switch span {
  color: var(--color-navy);
}

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-navy);
  position: relative;
}

.menu-toggle span::before,
.menu-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--color-navy);
}

.menu-toggle span::before {
  top: -6px;
}

.menu-toggle span::after {
  top: 6px;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: calc((100vh - var(--header-h)) * 0.5);
  display: flex;
  align-items: center;
  overflow: hidden;
  color: #fff;
  background: var(--color-navy-deep);
}

.hero__slides {
  position: absolute;
  inset: 0;
}

.hero__slide {
  position: absolute;
  inset: 0;
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  opacity: 0;
  transform: scale(1.04);
  transition: opacity 1.1s var(--ease), transform 6.5s ease-out;
}

.hero__slide.is-active {
  opacity: 1;
  transform: scale(1);
  z-index: 1;
}

.hero__veil {
  position: absolute;
  inset: 0;
  z-index: 2;
  background: linear-gradient(
    105deg,
    rgba(6, 24, 44, 0.72) 0%,
    rgba(6, 24, 44, 0.45) 42%,
    rgba(6, 24, 44, 0.28) 100%
  );
  pointer-events: none;
}

.hero__grid {
  position: absolute;
  inset: 0;
  z-index: 2;
  opacity: 0.35;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(to bottom, black 20%, transparent 80%);
  animation: grid-drift 28s linear infinite;
  pointer-events: none;
}

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

.hero__content {
  position: relative;
  z-index: 3;
  padding: 48px 0 72px;
  max-width: 720px;
}

.hero__brand {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent-bright);
  margin-bottom: 20px;
  opacity: 0;
  animation: rise-in 0.8s var(--ease) 0.1s forwards;
}

.hero__title {
  margin: 0 0 24px;
  font-family: var(--font-display);
  font-size: clamp(32px, 4.5vw, 48px);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: 0.01em;
  opacity: 0;
  animation: rise-in 0.9s var(--ease) 0.25s forwards;
}

.hero__desc {
  margin: 0 0 36px;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.78);
  max-width: 560px;
  opacity: 0;
  animation: rise-in 0.9s var(--ease) 0.4s forwards;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  opacity: 0;
  animation: rise-in 0.9s var(--ease) 0.55s forwards;
}

.hero__dots {
  position: absolute;
  left: 50%;
  bottom: 22px;
  z-index: 4;
  display: flex;
  gap: 10px;
  transform: translateX(-50%);
}

.hero__dot {
  width: 8px;
  height: 8px;
  padding: 0;
  border: 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.35);
  cursor: pointer;
  transition: width 0.25s var(--ease), background 0.25s var(--ease);
}

.hero__dot.is-active {
  width: 28px;
  background: #fff;
}

.hero__dot:focus-visible {
  outline: 2px solid var(--color-accent-bright);
  outline-offset: 3px;
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 28px;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius);
  transition: background 0.25s var(--ease), color 0.25s var(--ease),
    border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.btn:hover {
  transform: translateY(-1px);
}

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

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

.btn--ghost {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.35);
}

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

button.btn--ghost {
  cursor: pointer;
  font: inherit;
}

.btn--text {
  height: auto;
  padding: 0;
  color: var(--color-accent);
  font-weight: 600;
}

.btn--text:hover {
  color: var(--color-steel);
}

.btn--text .arrow {
  transition: transform 0.25s var(--ease);
}

.btn--text:hover .arrow {
  transform: translateX(4px);
}

.about-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px 20px;
  margin-top: 8px;
}

.about-actions--end {
  justify-content: flex-end;
  margin-top: 20px;
}

.about-actions__videos {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 20px;
  margin-left: auto;
}

.about-actions .btn--text {
  background: none;
  border: 0;
  cursor: pointer;
  font: inherit;
}

.video-modal[hidden] {
  display: none;
}

.video-modal {
  position: fixed;
  inset: 0;
  z-index: 1200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.video-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(6, 24, 44, 0.72);
  backdrop-filter: blur(2px);
}

.video-modal__dialog {
  position: relative;
  z-index: 1;
  width: min(960px, 100%);
  background: #04101f;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.35);
}

.video-modal__close {
  position: absolute;
  top: 10px;
  right: 12px;
  z-index: 2;
  width: 36px;
  height: 36px;
  border: 0;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.45);
  color: #fff;
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
}

.video-modal__close:hover {
  background: rgba(0, 0, 0, 0.65);
}

.video-modal__player {
  display: block;
  width: 100%;
  max-height: min(80vh, 540px);
  background: #000;
  vertical-align: middle;
}

body.is-video-open {
  overflow: hidden;
}

/* ---------- Sections ---------- */
.section {
  padding: 96px 0;
}

.section--muted {
  background: var(--color-surface-muted);
}

.section__head {
  margin-bottom: 48px;
}

.section__label {
  display: block;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.section__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(26px, 3vw, 34px);
  font-weight: 700;
  color: var(--color-navy);
  letter-spacing: 0.01em;
}

.section__desc {
  margin: 14px 0 0;
  max-width: 560px;
  color: var(--color-ink-soft);
  font-size: 15px;
}

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 56px;
  align-items: start;
}

.about-copy p {
  margin: 0 0 18px;
  color: var(--color-ink-soft);
  text-align: justify;
}

.about-copy p:last-of-type {
  margin-bottom: 28px;
}

.about-highlights {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.highlight {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 20px 22px;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.highlight:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-soft);
}

.highlight__icon {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: linear-gradient(145deg, rgba(13, 143, 159, 0.12), rgba(30, 77, 115, 0.1));
  color: var(--color-accent);
}

.highlight__icon svg {
  width: 22px;
  height: 22px;
}

.highlight__title {
  margin: 0 0 4px;
  font-size: 15px;
  font-weight: 700;
  color: var(--color-navy);
}

.highlight__text {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-ink-soft);
}

/* ---------- Products ---------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.product-card {
  position: relative;
  display: block;
  padding: 28px 24px 24px;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
  color: inherit;
  text-decoration: none;
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease),
    box-shadow 0.3s var(--ease);
}

.product-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-steel));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s var(--ease);
}

.product-card:hover {
  border-color: var(--color-line-strong);
  transform: translateY(-4px);
  box-shadow: var(--shadow-soft);
}

.product-card:hover::before {
  transform: scaleX(1);
}

.product-card__num {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.08em;
  margin-bottom: 14px;
}

.product-card__title {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 700;
  color: var(--color-navy);
  line-height: 1.4;
}

.product-card__desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-ink-soft);
}

/* ---------- Timeline ---------- */
.timeline {
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 28px;
  left: 4%;
  right: 4%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-steel), var(--color-amber));
  opacity: 0.35;
}

.timeline__item {
  position: relative;
  padding-top: 64px;
  text-align: center;
}

.timeline__dot {
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-surface);
  border: 3px solid var(--color-accent);
  box-shadow: 0 0 0 6px rgba(13, 143, 159, 0.12);
}

.timeline__year {
  display: block;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-navy);
  margin-bottom: 8px;
}

.timeline__text {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--color-ink-soft);
}

/* ---------- Solutions ---------- */
.solution-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.solution {
  position: relative;
  min-height: 220px;
  padding: 32px 28px;
  border-radius: var(--radius);
  overflow: hidden;
  color: #fff;
  background: var(--color-navy);
  isolation: isolate;
}

.solution::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 90% 10%, rgba(18, 181, 200, 0.35), transparent 45%),
    linear-gradient(145deg, var(--color-navy-deep), var(--color-steel));
  transition: transform 0.5s var(--ease);
}

.solution:hover::before {
  transform: scale(1.06);
}

.solution:nth-child(2)::before {
  background:
    radial-gradient(circle at 10% 80%, rgba(196, 120, 42, 0.3), transparent 45%),
    linear-gradient(145deg, #0a2744, #1a3f5c);
}

.solution:nth-child(3)::before {
  background:
    radial-gradient(circle at 80% 80%, rgba(30, 77, 115, 0.5), transparent 45%),
    linear-gradient(145deg, #06182c, #0d8f9f);
}

.solution__title {
  margin: 0 0 12px;
  font-size: 20px;
  font-weight: 700;
}

.solution__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.78);
}

/* ---------- Partners ---------- */
.partner-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

.partner {
  display: grid;
  place-items: center;
  height: 88px;
  padding: 16px;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-ink-soft);
  letter-spacing: 0.02em;
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease);
}

.partner:hover {
  border-color: var(--color-accent);
  color: var(--color-navy);
}

/* ---------- CTA band ---------- */
.cta-band {
  position: relative;
  padding: 72px 0;
  overflow: hidden;
  color: #fff;
  background: linear-gradient(120deg, var(--color-navy-deep), var(--color-steel) 60%, var(--color-accent));
}

.cta-band__inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.cta-band__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
}

.cta-band__desc {
  margin: 0;
  color: rgba(255, 255, 255, 0.8);
  max-width: 480px;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-navy-deep);
  color: rgba(255, 255, 255, 0.72);
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .brand__name {
  color: #fff;
}

.footer-brand .brand__tag {
  color: rgba(255, 255, 255, 0.55);
}

.footer-brand p {
  margin: 20px 0 0;
  font-size: 13px;
  line-height: 1.7;
  max-width: 280px;
}

.footer-col__title {
  margin: 0 0 18px;
  font-size: 14px;
  font-weight: 700;
  color: #fff;
}

.footer-col a {
  display: block;
  font-size: 13px;
  margin-bottom: 10px;
  transition: color 0.2s;
}

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

.footer-contact li {
  font-size: 13px;
  margin-bottom: 10px;
  line-height: 1.6;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding: 20px 0;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.45);
}

.footer-bottom a:hover {
  color: rgba(255, 255, 255, 0.8);
}

/* ---------- Page placeholder ---------- */
.page-hero {
  padding: 72px 0 48px;
  background:
    linear-gradient(135deg, rgba(6, 24, 44, 0.94), rgba(13, 143, 159, 0.55)),
    linear-gradient(160deg, #06182c, #0a2744);
  color: #fff;
}

.page-hero--photo {
  min-height: 280px;
  display: flex;
  align-items: center;
  background-color: #06182c;
  background-repeat: no-repeat;
  background-position: center;
  background-size: cover;
}

.page-hero--about {
  background-image:
    linear-gradient(105deg, rgba(6, 24, 44, 0.72) 0%, rgba(6, 24, 44, 0.42) 48%, rgba(6, 24, 44, 0.28) 100%),
    url("../assets/images/about-hero.png");
}

.page-hero--services {
  background-image:
    linear-gradient(105deg, rgba(6, 24, 44, 0.72) 0%, rgba(6, 24, 44, 0.42) 48%, rgba(6, 24, 44, 0.28) 100%),
    url("../assets/images/services-hero.png");
}

.page-hero--products {
  background-image:
    linear-gradient(105deg, rgba(6, 24, 44, 0.72) 0%, rgba(6, 24, 44, 0.42) 48%, rgba(6, 24, 44, 0.28) 100%),
    url("../assets/images/products-hero.png");
}

.page-hero--news {
  background-image:
    linear-gradient(105deg, rgba(6, 24, 44, 0.72) 0%, rgba(6, 24, 44, 0.42) 48%, rgba(6, 24, 44, 0.28) 100%),
    url("../assets/images/news-hero.png");
}

.page-hero--contact {
  background-image:
    linear-gradient(105deg, rgba(6, 24, 44, 0.72) 0%, rgba(6, 24, 44, 0.42) 48%, rgba(6, 24, 44, 0.28) 100%),
    url("../assets/images/contact-hero.png");
}

.page-hero__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
}

.page-hero__desc {
  margin: 0;
  max-width: 520px;
  color: rgba(255, 255, 255, 0.75);
}

.page-body {
  padding: 64px 0 96px;
  color: var(--color-ink-soft);
}

.page-body p {
  max-width: 720px;
}

/* ---------- About page ---------- */
.about-intro {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 48px;
  align-items: start;
}

.stat-stack {
  display: grid;
  gap: 16px;
}

.stat-card {
  padding: 24px 22px;
  background: var(--color-surface-muted);
  border-radius: var(--radius);
  border: 1px solid var(--color-line);
}

.stat-card__num {
  display: block;
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1.1;
  margin-bottom: 6px;
}

.stat-card__label {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-navy);
}

.about-intro__copy p {
  margin: 0 0 16px;
  color: var(--color-ink-soft);
  text-align: justify;
}

.about-intro__gallery {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 8px 0 22px;
}

.about-intro__gallery figure {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--color-line);
  background: var(--color-surface-muted);
}

.about-intro__gallery img {
  display: block;
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.cert-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.cert-item {
  display: block;
  aspect-ratio: 3 / 4;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-surface-muted);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.cert-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.cert-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-soft);
}

.cert-item--static {
  cursor: default;
}

.cert-item--static:hover {
  transform: none;
  box-shadow: none;
}

.history-list {
  display: grid;
  gap: 0;
  border-left: 2px solid var(--color-line);
  margin-left: 8px;
}

.history-item {
  position: relative;
  padding: 0 0 28px 28px;
}

.history-item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-surface);
  border: 3px solid var(--color-accent);
}

.history-item__year {
  display: block;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 6px;
}

.history-item p {
  margin: 0;
  max-width: none;
  color: var(--color-ink-soft);
  font-size: 14px;
  line-height: 1.7;
}

/* ---------- Services page ---------- */
.service-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.shot-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 28px;
}

.shot-strip--4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.shot-card {
  display: block;
  width: 100%;
  margin: 0;
  padding: 0;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--color-surface);
  cursor: pointer;
  text-align: left;
  color: inherit;
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.shot-card--static {
  cursor: default;
}

.shot-card--static:hover {
  border-color: var(--color-line);
  box-shadow: none;
}

.shot-card__thumb {
  display: block;
  width: 100%;
  height: 120px;
  overflow: hidden;
  background: #0a1a2e;
  line-height: 0;
}

.shot-card__thumb img {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  /* 与 360 常见渲染一致：铺满容器，避免 Chrome 用 cover 的裁切差异 */
  object-fit: fill;
  -o-object-fit: fill;
  image-rendering: auto;
}

.shot-card__label {
  display: block;
  padding: 8px 10px;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-navy);
  line-height: 1.35;
}

.shot-modal[hidden] {
  display: none;
}

.shot-modal {
  position: fixed;
  inset: 0;
  z-index: 1200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.shot-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(6, 24, 44, 0.78);
  backdrop-filter: blur(2px);
}

.shot-modal__dialog {
  position: relative;
  z-index: 1;
  flex: 0 1 auto;
  align-self: center;
  width: auto;
  max-width: min(960px, calc(100vw - 48px));
  max-height: min(90vh, calc(100vh - 48px));
  overflow: auto;
  background: #04101f;
  border-radius: 12px;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.35);
  padding: 16px;
  margin: 0 auto;
}

.shot-modal__close {
  position: absolute;
  top: 10px;
  right: 12px;
  z-index: 2;
  width: 36px;
  height: 36px;
  border: 0;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.45);
  color: #fff;
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
}

.shot-modal__img {
  display: block;
  width: auto;
  max-width: 100%;
  height: auto;
  max-height: min(78vh, calc(100vh - 120px));
  margin: 0 auto;
  object-fit: contain;
  background: #000;
  border-radius: 8px;
}

.shot-modal__caption {
  margin: 12px 4px 0;
  color: rgba(255, 255, 255, 0.85);
  font-size: 14px;
  text-align: center;
}

body.is-shot-open {
  overflow: hidden;
}

body.is-nav-open {
  overflow: hidden;
}

.about-intro__copy .shot-strip {
  margin: 4px 0 20px;
}

.service-card {
  padding: 28px 26px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-surface);
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.service-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-soft);
}

.service-card__title {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 700;
  color: var(--color-navy);
}

.service-card__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-ink-soft);
}

/* ---------- Quality AI analysis ---------- */
.section--qa {
  padding-top: 36px;
  background: var(--color-surface-muted);
}

.qa-app {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
  min-height: 640px;
}

.qa-sidebar {
  position: sticky;
  top: calc(var(--header-h) + 16px);
  padding: 20px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--color-line);
  background: #0a1f33;
  color: #d7e6f2;
  box-shadow: var(--shadow-soft);
}

.qa-sidebar__label {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent-bright);
}

.qa-sidebar__title {
  margin: 0 0 18px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.45;
  color: #fff;
}

.qa-menu {
  display: grid;
  gap: 8px;
}

.qa-menu__item {
  width: 100%;
  padding: 12px 12px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.03);
  color: inherit;
  text-align: left;
  cursor: pointer;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.qa-menu__item strong {
  display: block;
  margin-bottom: 4px;
  font-size: 14px;
  font-weight: 700;
  color: #f3f8fc;
}

.qa-menu__item span {
  display: block;
  font-size: 12px;
  line-height: 1.5;
  color: rgba(215, 230, 242, 0.72);
}

.qa-menu__item:hover {
  border-color: rgba(18, 181, 200, 0.45);
  background: rgba(18, 181, 200, 0.1);
}

.qa-menu__item.is-active {
  border-color: rgba(18, 181, 200, 0.7);
  background: linear-gradient(135deg, rgba(13, 143, 159, 0.35), rgba(10, 39, 68, 0.65));
  box-shadow: inset 3px 0 0 var(--color-accent-bright);
}

.qa-content {
  min-width: 0;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: #061526;
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.qa-panel[hidden] {
  display: none !important;
}

.qa-panel {
  display: block;
}

.qa-panel__toolbar {
  padding: 16px 18px 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.qa-panel__title {
  margin: 0 0 4px;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
}

.qa-panel__desc {
  margin: 0;
  font-size: 13px;
  color: rgba(215, 230, 242, 0.75);
}

.qa-panel__view {
  padding: 12px;
  background: #030b14;
}

.qa-panel__view img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 6px;
  background: #0a1a2e;
}

/* ---------- AI analysis hub & detail ---------- */
.page-hero--ai {
  background-image:
    linear-gradient(105deg, rgba(6, 24, 44, 0.78) 0%, rgba(6, 24, 44, 0.48) 48%, rgba(6, 24, 44, 0.32) 100%),
    url("../assets/images/products-hero.png");
}

.page-hero__eyebrow {
  margin: 0 0 10px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-accent-bright);
}

.section--ai-jump {
  padding-top: 36px;
  padding-bottom: 8px;
}

.ai-jump {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.ai-jump__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--color-line);
  background: var(--color-surface);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.ai-jump__item:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(6, 24, 44, 0.08);
}

.ai-jump__item strong {
  font-size: 15px;
  color: var(--color-navy);
}

.ai-jump__item span {
  font-size: 12px;
  color: var(--color-ink-soft);
}

.ai-cat {
  padding-top: 40px;
}

.ai-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.ai-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--color-line);
  background: var(--color-surface);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.ai-card:hover {
  border-color: rgba(13, 143, 159, 0.45);
  transform: translateY(-3px);
  box-shadow: 0 14px 36px rgba(6, 24, 44, 0.1);
}

.ai-card__media {
  aspect-ratio: 16 / 10;
  background: #0a1a2e;
  overflow: hidden;
}

.ai-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  display: block;
}

.ai-card__media--placeholder {
  display: grid;
  place-items: center;
  background:
    linear-gradient(145deg, #0a2744, #0d8f9f 140%);
}

.ai-card__media--placeholder span {
  font-family: var(--font-display);
  font-size: 42px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.85);
}

.ai-card__body {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px 16px 18px;
  flex: 1;
}

.ai-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.ai-card__num {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  color: var(--color-accent);
}

.ai-card__aka {
  font-size: 12px;
  color: var(--color-ink-soft);
}

.ai-card__title {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--color-navy);
}

.ai-card__desc {
  margin: 0;
  flex: 1;
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-ink-soft);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.ai-card__more {
  margin-top: 4px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
}

.ai-detail {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 32px;
  align-items: start;
  margin-top: 8px;
}

.ai-detail__head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 14px;
}

.ai-detail__num {
  flex-shrink: 0;
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: linear-gradient(145deg, #0a2744, #0d8f9f);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
}

.ai-detail__title {
  margin: 0 0 4px;
  font-size: 26px;
  color: var(--color-navy);
}

.ai-detail__aka {
  margin: 0;
  font-size: 14px;
  color: var(--color-accent);
}

.ai-detail__summary {
  margin: 0 0 22px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--color-ink);
}

.ai-detail__h {
  margin: 0 0 12px;
  font-size: 16px;
  color: var(--color-navy);
}

.ai-detail__points {
  margin: 0 0 28px;
  padding-left: 18px;
  color: var(--color-ink);
}

.ai-detail__points li {
  margin-bottom: 8px;
  line-height: 1.7;
}

.ai-detail__figure {
  margin: 0 0 28px;
  border-radius: var(--radius);
  border: 1px solid var(--color-line);
  overflow: hidden;
  background: #0a1a2e;
}

.ai-detail__figure img {
  width: 100%;
  height: auto;
  display: block;
}

.ai-detail__figure figcaption {
  padding: 10px 14px;
  font-size: 12px;
  color: var(--color-ink-soft);
  background: var(--color-surface);
  border-top: 1px solid var(--color-line);
}

.ai-detail__empty {
  margin: 0 0 28px;
  padding: 36px 24px;
  border-radius: var(--radius);
  border: 1px dashed var(--color-line);
  background: var(--color-surface-muted);
  text-align: center;
}

.ai-detail__empty strong {
  display: block;
  margin-bottom: 8px;
  color: var(--color-navy);
}

.ai-detail__empty p {
  margin: 0;
  color: var(--color-ink-soft);
  font-size: 14px;
}

.ai-detail__pager {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding-top: 8px;
  border-top: 1px solid var(--color-line);
  font-size: 14px;
}

.ai-detail__pager a {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 600;
}

.ai-detail__pager a:hover {
  text-decoration: underline;
}

.ai-side {
  position: sticky;
  top: calc(var(--header-h) + 24px);
  padding: 20px;
  border-radius: var(--radius);
  border: 1px solid var(--color-line);
  background: var(--color-surface-muted);
}

.ai-side__title {
  margin: 0 0 8px;
  font-size: 16px;
  color: var(--color-navy);
}

.ai-side__desc {
  margin: 0 0 16px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-ink-soft);
}

.ai-side__list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
}

.ai-side__link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 8px;
  text-decoration: none;
  color: var(--color-ink);
  font-size: 13px;
  transition: background 0.15s var(--ease);
}

.ai-side__link span {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  color: var(--color-accent);
}

.ai-side__link:hover,
.ai-side__link.is-active {
  background: #fff;
  color: var(--color-navy);
}

.ai-side__all {
  width: 100%;
  margin-bottom: 10px;
  justify-content: center;
}

.ai-side__cta {
  width: 100%;
  justify-content: center;
}

/* ---------- News page ---------- */
.news-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 40px;
  align-items: start;
}

.news-aside {
  position: sticky;
  top: calc(var(--header-h) + 24px);
  padding: 20px;
  background: var(--color-surface-muted);
  border-radius: var(--radius);
  border: 1px solid var(--color-line);
}

.news-aside__title {
  margin: 0 0 14px;
  font-size: 15px;
  font-weight: 700;
  color: var(--color-navy);
}

.news-aside__year {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-accent);
}

.news-months {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.news-months button {
  height: 32px;
  font-size: 12px;
  color: var(--color-ink-soft);
  border: 1px solid var(--color-line);
  border-radius: 4px;
  background: #fff;
  transition: all 0.2s;
}

.news-months button:hover,
.news-months button.is-active {
  color: #fff;
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.news-list {
  display: grid;
  gap: 18px;
}

.news-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 22px;
  padding: 20px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: #fff;
  transition: border-color 0.25s, box-shadow 0.25s;
}

.news-item:hover {
  border-color: var(--color-line-strong);
  box-shadow: var(--shadow-soft);
}

.news-item__cover {
  height: 100px;
  border-radius: 4px;
  background:
    linear-gradient(135deg, rgba(13, 143, 159, 0.18), rgba(10, 39, 68, 0.35)),
    linear-gradient(160deg, #e8eef4, #d5e2ec);
  display: grid;
  place-items: center;
  color: var(--color-navy);
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.news-item__title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--color-navy);
  line-height: 1.45;
}

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

.news-item__excerpt {
  margin: 0 0 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-ink-soft);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-item__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  font-size: 12px;
  color: var(--color-ink-soft);
}

.news-item__meta a {
  color: var(--color-accent);
  font-weight: 600;
}

.news-item__cover {
  text-decoration: none;
}

/* ---------- News detail ---------- */
.news-detail-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 48px;
  align-items: start;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: 28px;
  font-size: 13px;
  color: var(--color-ink-soft);
}

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

.breadcrumb__sep {
  opacity: 0.5;
}

.breadcrumb__current {
  color: var(--color-navy);
  max-width: 420px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.news-detail__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 700;
  color: var(--color-navy);
  line-height: 1.35;
}

.news-detail__meta {
  margin: 0 0 28px;
  font-size: 13px;
  color: var(--color-ink-soft);
}

.news-detail__body {
  color: var(--color-ink-soft);
  font-size: 15px;
  line-height: 1.9;
}

.news-detail__body p {
  margin: 0 0 18px;
  max-width: none;
  text-align: justify;
}

.news-detail__figure {
  margin: 24px 0;
}

.news-detail__figure img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--color-line);
  background: var(--color-surface-muted);
}

.news-detail__nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--color-line);
}

.news-detail__nav > div {
  font-size: 13px;
  color: var(--color-ink-soft);
  line-height: 1.6;
}

.news-detail__nav span {
  display: block;
  margin-bottom: 4px;
  color: var(--color-navy);
  font-weight: 600;
}

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

.news-detail__nav em {
  font-style: normal;
  opacity: 0.6;
}

.news-related {
  position: sticky;
  top: calc(var(--header-h) + 24px);
  padding: 22px 20px;
  background: var(--color-surface-muted);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.news-related__title {
  margin: 0 0 16px;
  font-size: 16px;
  font-weight: 700;
  color: var(--color-navy);
}

.news-related__item {
  display: block;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-line);
}

.news-related__item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.news-related__item strong {
  display: -webkit-box;
  margin-bottom: 6px;
  font-size: 14px;
  font-weight: 650;
  color: var(--color-navy);
  line-height: 1.45;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-related__item span {
  display: -webkit-box;
  margin-bottom: 6px;
  font-size: 12px;
  color: var(--color-ink-soft);
  line-height: 1.6;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-related__item em {
  font-style: normal;
  font-size: 12px;
  color: var(--color-accent);
}

.news-related__item:hover strong {
  color: var(--color-accent);
}

.news-related__more {
  display: inline-flex;
  margin-top: 16px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
}

.news-pager {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-top: 28px;
}

.news-pager button,
.news-pager span {
  min-width: 36px;
  height: 36px;
  padding: 0 10px;
  display: inline-grid;
  place-items: center;
  border-radius: 4px;
  border: 1px solid var(--color-line);
  background: #fff;
  font-size: 13px;
  color: var(--color-ink-soft);
}

.news-pager button.is-active,
.news-pager button:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

.news-pager__count {
  margin-right: auto;
  border: none;
  background: transparent;
  padding-left: 0;
}

/* ---------- Contact page ---------- */
.section--contact {
  padding-top: 36px;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 28px;
  align-items: start;
}

.contact-side {
  display: grid;
  gap: 20px;
}

.contact-card {
  padding: 28px 24px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-surface);
}

.contact-card h2,
.contact-follow h2 {
  margin: 0 0 14px;
  font-size: 20px;
  color: var(--color-navy);
}

.contact-follow {
  padding: 0;
}

.contact-media {
  display: grid;
  gap: 14px;
  justify-items: stretch;
}

.contact-media__wechat {
  margin: 0;
  width: 100%;
}

.contact-media__wechat img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--color-line);
}

.contact-media__qrs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  width: 100%;
}

.contact-media__qr {
  margin: 0;
  text-align: center;
}

.contact-media__qr img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--color-line);
  background: #fff;
}

.contact-media__qr figcaption {
  margin-top: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-navy);
}

.contact-left {
  display: grid;
  gap: 20px;
}

.contact-office__gallery {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.contact-office__gallery figure {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--color-line);
  background: var(--color-surface-muted);
}

.contact-office__gallery img {
  display: block;
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.contact-list {
  display: grid;
  gap: 18px;
}

.contact-list dt {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 4px;
}

.contact-list dd {
  margin: 0;
  font-size: 16px;
  color: var(--color-navy);
  line-height: 1.6;
}

.contact-list a {
  color: var(--color-navy);
}

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

.contact-note {
  margin: 0;
  color: var(--color-ink-soft);
  line-height: 1.8;
  max-width: none;
}

/* ---------- Reveal on scroll ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease), transform 0.7s 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;
}

/* ---------- Back to top ---------- */
.back-top {
  position: fixed;
  right: 28px;
  bottom: 28px;
  z-index: 90;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--color-navy);
  color: #fff;
  box-shadow: 0 8px 24px rgba(6, 24, 44, 0.25);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.3s, visibility 0.3s, transform 0.3s, background 0.25s;
}

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

.back-top:hover {
  background: var(--color-accent);
}

/* ---------- FDE delivery page ---------- */
.fde-intro {
  max-width: 900px;
  margin: 0 auto 34px;
  color: var(--color-ink-soft);
  font-size: 15px;
  line-height: 1.85;
  text-align: center;
}

.fde-assurance {
  margin: 32px 0 26px;
  padding-top: 22px;
  border-top: 1px solid var(--color-line);
  text-align: center;
  color: var(--color-ink-soft);
  font-size: 14px;
}

.fde-faq {
  max-width: 880px;
  margin: 0 auto;
}

.fde-faq details {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-surface);
  padding: 18px 24px;
  margin-bottom: 12px;
}

.fde-faq summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--color-ink);
  font-size: 16px;
}

.fde-faq details[open] summary {
  color: var(--color-accent);
}

.fde-faq p {
  margin-top: 10px;
  color: var(--color-ink-soft);
  font-size: 15px;
  line-height: 1.85;
}

.fde-principles .solution__title {
  display: flex;
  align-items: center;
  gap: 10px;
}

.fde-principles .solution__title::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  flex: none;
}

/* ---------- Mobile ---------- */
@media (max-width: 1024px) {
  .nav {
    gap: 18px;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .about-intro,
  .news-layout,
  .contact-grid,
  .news-detail-layout {
    grid-template-columns: 1fr;
  }

  .contact-media__qrs {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .contact-office__gallery img {
    height: 200px;
  }

  .news-aside,
  .news-related {
    position: static;
  }

  .news-detail__nav {
    grid-template-columns: 1fr;
  }

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

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

  .shot-strip--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .timeline {
    grid-template-columns: 1fr 1fr;
    gap: 28px 16px;
  }

  .timeline::before {
    display: none;
  }

  .timeline__item {
    padding-top: 0;
    text-align: left;
    padding-left: 28px;
  }

  .timeline__dot {
    top: 6px;
    left: 0;
    transform: none;
  }

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

  .qa-app {
    grid-template-columns: 1fr;
  }

  .qa-sidebar {
    position: static;
  }

  .qa-menu {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

  .ai-detail {
    grid-template-columns: 1fr;
  }

  .ai-side {
    position: static;
  }
}

@media (max-width: 768px) {
  :root {
    --header-h: 60px;
  }

  body {
    overflow-x: hidden;
    font-size: 14px;
  }

  .container {
    width: min(100% - 32px, var(--container));
  }

  .menu-toggle {
    display: flex;
  }

  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    z-index: 90;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    padding: 8px 20px 20px;
    background: #fff;
    border-bottom: 1px solid var(--color-line);
    box-shadow: 0 16px 32px rgba(10, 39, 68, 0.08);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.35s var(--ease), opacity 0.35s, visibility 0.35s;
  }

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

  .nav__link {
    padding: 14px 0;
    border-bottom: 1px solid var(--color-line);
    font-size: 15px;
  }

  .nav__link::after {
    display: none;
  }

  .lang-switch {
    display: none;
  }

  .hero {
    min-height: 42vh;
  }

  .hero__content {
    padding: 32px 0 56px;
    max-width: 100%;
  }

  .hero__brand {
    font-size: 11px;
    letter-spacing: 0.12em;
    margin-bottom: 14px;
  }

  .hero__title {
    font-size: clamp(26px, 7vw, 34px);
    margin-bottom: 16px;
  }

  .hero__desc {
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 24px;
  }

  .hero__actions {
    gap: 10px;
  }

  .hero__actions .btn {
    flex: 1 1 calc(50% - 10px);
    min-width: 0;
    justify-content: center;
    padding: 0 14px;
    height: 42px;
    font-size: 13px;
  }

  .hero__actions .btn--primary {
    flex: 1 1 100%;
  }

  .hero__dots {
    bottom: 14px;
    gap: 8px;
  }

  .hero__dot {
    width: 7px;
    height: 7px;
  }

  .hero__dot.is-active {
    width: 22px;
  }

  .page-hero {
    padding: 48px 0 32px;
  }

  .page-hero--photo {
    min-height: 200px;
  }

  .page-hero__title {
    font-size: clamp(24px, 6.5vw, 32px);
  }

  .page-hero__desc {
    font-size: 14px;
  }

  .section {
    padding: 48px 0;
  }

  .section__title {
    font-size: clamp(22px, 5.5vw, 28px);
  }

  .section__desc {
    font-size: 14px;
  }

  .product-grid,
  .solution-row,
  .partner-grid,
  .footer-grid,
  .service-grid {
    grid-template-columns: 1fr;
  }

  .cert-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .shot-strip,
  .shot-strip--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    margin-top: 20px;
  }

  .shot-card__thumb {
    height: 88px;
  }

  .shot-card__label {
    padding: 7px 8px;
    font-size: 11px;
  }

  .about-intro__gallery {
    grid-template-columns: 1fr;
  }

  .about-intro__gallery img {
    height: 180px;
  }

  .about-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 14px;
  }

  .about-actions__videos {
    width: 100%;
    margin-left: 0;
    justify-content: flex-start;
    gap: 16px;
  }

  .about-actions--end .about-actions__videos {
    justify-content: flex-end;
  }

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

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

  .news-item {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .news-item__cover {
    height: 120px;
  }

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

  .qa-menu {
    grid-template-columns: 1fr;
  }

  .qa-panel__toolbar {
    padding: 14px 14px 10px;
  }

  .qa-panel__view {
    padding: 8px;
  }

  .ai-jump {
    grid-template-columns: 1fr;
  }

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

  .ai-detail__title {
    font-size: 22px;
  }

  .ai-detail__pager {
    flex-direction: column;
  }

  .news-detail__title {
    font-size: clamp(22px, 6vw, 28px);
  }

  .news-detail__figure img {
    width: 100%;
    height: auto;
  }

  .news-detail__nav {
    gap: 12px;
    font-size: 13px;
  }

  .contact-media__qrs {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .contact-office__gallery img {
    height: 180px;
  }

  .cta-band__inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
  }

  .cta-band__title {
    font-size: 22px;
  }

  .brand__logo {
    height: 34px;
  }

  .brand__tag {
    display: none;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .video-modal {
    padding: 12px;
    align-items: flex-end;
  }

  .video-modal__dialog {
    width: 100%;
    border-radius: 12px 12px 0 0;
  }

  .video-modal__player {
    max-height: 56vh;
  }

  .shot-modal {
    padding: 20px 16px;
    align-items: center;
    justify-content: center;
  }

  .shot-modal__dialog {
    width: auto;
    max-width: calc(100vw - 32px);
    max-height: calc(100vh - 40px);
    border-radius: 12px;
    padding: 12px;
    margin: 0 auto;
    overflow: hidden;
  }

  .shot-modal__img {
    width: auto;
    max-width: 100%;
    max-height: calc(100vh - 120px);
    height: auto;
    margin: 0 auto;
    object-fit: contain;
  }

  .shot-modal__caption {
    font-size: 13px;
  }

  .back-top {
    right: 14px;
    bottom: 14px;
  }
}

@media (max-width: 480px) {
  .container {
    width: min(100% - 24px, var(--container));
  }

  .hero__actions .btn {
    flex: 1 1 100%;
  }

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

  .shot-strip,
  .shot-strip--4 {
    grid-template-columns: 1fr 1fr;
  }

  .shot-card__thumb {
    height: 78px;
  }

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

  .contact-media__wechat img {
    width: 100%;
  }

  .stat-card__num {
    font-size: 30px;
  }

  .highlight {
    padding: 16px;
  }
}