/* Homepage — pure CSS for .landing-page (no Tailwind) */

:root {
  --lp-gray-50: #f9fafb;
  --lp-gray-600: #4b5563;
  --lp-gray-800: #1f2937;
  --lp-blue-600: #00327e;
  --lp-blue-700: #00255e;
  --lp-blue-800: #001d47;
  --lp-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --lp-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
}

body.landing-page {
  min-height: 1024px;
  margin: 0;
  font-family: "Roboto", -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, "Noto Sans", "Liberation Sans", sans-serif;
  background: #fff;
  color: var(--lp-gray-800);
  /* 流体间距：大屏在下方 media 中再放大 */
  --lp-container-pad: clamp(12px, 3vw, 32px);
  --lp-section-pad-y: clamp(32px, 3.2vw, 64px);
  --lp-gap: clamp(14px, 1.8vw, 24px);
  --lp-title-bar-gap: clamp(6px, 0.65vw, 14px);
  --lp-bar-bottom: clamp(32px, 3.2vw, 64px);
}

@media (min-width: 2200px) {
  body.landing-page {
    --lp-container-pad: clamp(16px, 3.2vw, 44px);
    --lp-section-pad-y: clamp(40px, 3.8vw, 96px);
    --lp-gap: clamp(18px, 2.1vw, 40px);
    --lp-title-bar-gap: clamp(8px, 0.8vw, 20px);
    --lp-bar-bottom: clamp(40px, 3.8vw, 96px);
  }
}

@media (min-width: 2800px) {
  body.landing-page {
    --lp-container-pad: clamp(18px, 3.4vw, 52px);
    --lp-section-pad-y: clamp(48px, 4.2vw, 120px);
    --lp-gap: clamp(20px, 2.4vw, 48px);
    --lp-title-bar-gap: clamp(10px, 0.9vw, 24px);
    --lp-bar-bottom: clamp(48px, 4.2vw, 112px);
  }
}

/*
 * 大屏整页比例：以 1760px 宽为 1:1，随视口变宽放大（文字与布局同一倍数）。
 * 上限略提高，超宽屏仍可读；不支持 zoom 的浏览器会忽略。
 */
@media (min-width: 1600px) {
  body.landing-page {
    --lp-page-scale: min(1.75, max(1, 100vw / 1760));
    zoom: var(--lp-page-scale);
  }
}

body.landing-page .container {
  width: 100%;
  max-width: 100%;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--lp-container-pad);
  padding-right: var(--lp-container-pad);
  box-sizing: border-box;
}

@media (min-width: 1200px) {
  body.landing-page .container {
    max-width: 75% ;
  }
}

/* 超宽屏：在固定上限基础上用 vw 加宽内容区，减少两侧留白（与顶栏、页脚一致） */
@media (min-width: 2200px) {
  body.landing-page .container {
    max-width: min(1820px, 80vw);
  }
}

@media (min-width: 2600px) {
  body.landing-page .container {
    max-width: min(2160px, 84vw);
  }
}

/* ---------- Hero（5 图轮播） ---------- */
.landing-hero {
  position: relative;
  display: block;
  box-sizing: border-box;
  padding-top: var(--landing-header-height, 80px);
}

.landing-hero__slider {
  position: relative;
  width: 100%;
}

.landing-hero__viewport {
  overflow: hidden;
  width: 100%;
}

.landing-hero__track {
  display: flex;
  width: calc(5 * 100%);
  transition: transform 0.55s cubic-bezier(0.33, 1, 0.68, 1);
  will-change: transform;
}

@media (prefers-reduced-motion: reduce) {
  .landing-hero__track {
    transition-duration: 0.01ms;
  }
}

.landing-hero__slide {
  flex: 0 0 calc(100% / 5);
  width: calc(100% / 5);
  box-sizing: border-box;
}

.landing-hero__slide img {
  display: block;
  width: 100%;
  height: auto;
}

.landing-hero__arrow {
  position: absolute;
  top: 50%;
  z-index: 2;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border: none;
  border-radius: 50%;
  padding: 0;
  margin: 0;
  cursor: pointer;
  color: #fff;
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.landing-hero__arrow:hover {
  background: rgba(0, 50, 126, 0.85);
}

.landing-hero__arrow--prev {
  left: clamp(8px, 2vw, 20px);
}

.landing-hero__arrow--next {
  right: clamp(8px, 2vw, 20px);
}

.landing-hero__arrow i {
  font-size: 16px;
  pointer-events: none;
}

.landing-hero__dots {
  position: absolute;
  left: 0;
  right: 0;
  bottom: clamp(14px, 2.5vw, 28px);
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 10px;
  pointer-events: auto;
}

.landing-hero__dot {
  width: 10px;
  height: 10px;
  padding: 0;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.45);
  transition: transform 0.2s ease, background-color 0.2s ease;
}

.landing-hero__dot:hover {
  background: rgba(255, 255, 255, 0.75);
}

.landing-hero__dot.is-active {
  background: #fff;
  transform: scale(1.15);
}

@media (max-width: 640px) {
  .landing-hero__arrow {
    width: 38px;
    height: 38px;
  }

  .landing-hero__arrow i {
    font-size: 14px;
  }

  .landing-hero__dot {
    width: 8px;
    height: 8px;
  }
}

/* ---------- Buttons ---------- */
.landing-btn {
  display: inline-block;
  border: none;
  cursor: pointer;
  font-family: inherit;
  font-weight: 500;
  white-space: nowrap;
  border-radius: 12px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.landing-btn--primary {
  background: var(--lp-blue-600);
  color: #fff;
}

.landing-btn--primary:hover {
  background: var(--lp-blue-700);
}

.landing-btn--md {
  padding: clamp(8px, 1.2vw, 12px) clamp(16px, 2.6vw, 32px);
  font-size: clamp(14px, 1.1vw, 18px);

}

.landing-btn--sm {
  padding: clamp(8px, 1.2vw, 12px) clamp(14px, 2.4vw, 32px);
  font-size: clamp(14px, 1vw, 16px);
  line-height: 1.5;
}

a.landing-btn {
  text-decoration: none;
  text-align: center;
  box-sizing: border-box;
}

/* ---------- Section common ---------- */
.landing-section--gray {
  background: var(--lp-gray-50);
}

/* 案例区：浅冷色底，与优势区中性灰区分 */
.landing-section--cases {
  background: #e8edf6;
}

.landing-section--white {
  background: #fff;
}

.landing-section__title {
  margin: 0 0 5px;
  font-size: 40px;
  font-weight: 700;
  line-height: 1.25;
  text-align: center;
  color: var(--lp-gray-800);
}

.landing-section__bar {
  width: 96px;
  height: 4px;
  margin: 0 auto 28px;
  background: #4285F4;
}

.landing-section__actions {
  margin-top: var(--lp-bar-bottom);
  text-align: center;
}

/* ---------- Products (OUR PRODUCTS) ---------- */
.landing-section.landing-section--white.landing-products {
  background-color: #f3f4f6;
  background-image: url("/template/default/images/bg.webp");
  background-repeat: no-repeat;
  background-position: center;
  background-size: cover;
}

.landing-products {
  position: relative;
  overflow: hidden;
}

.landing-products__inner {
  position: relative;
  z-index: 1;
}

.landing-products .landing-products__page-title {
  color: var(--lp-blue-600);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.landing-products .landing-products__page-bar {
  background: var(--lp-blue-600);
  margin-bottom: 12px;
}

.landing-products__intro {
  margin: 0 auto var(--lp-bar-bottom);
  max-width: 42rem;
  text-align: center;
  font-size: clamp(16px, 1.35vw, 18px);
  line-height: 1.55;
  color: var(--lp-gray-600);
}

.landing-products__grid {
  display: grid;
  gap: clamp(28px, 3vw, 48px);
  align-items: start;
  grid-template-columns: 1fr;
}

@media (min-width: 1024px) {
  .landing-products__grid {
    grid-template-columns: 1fr 1fr;
  }
}

.landing-products__media {
  align-self: start;
}

.landing-products__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}

.landing-products__copy {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: clamp(16px, 2vw, 24px);
  text-align: left;
}

.landing-products__col-text {
  display: flex;
  flex-direction: column;
  gap: 0;
}

@media (max-width: 1023px) {
  .landing-products__copy {
    text-align: center;
    align-items: center;
  }

  .landing-products__col-text {
    align-items: center;
    max-width: 100%;
  }

  .landing-products__more-row {
    text-align: center;
  }

  .landing-products__tabs {
    justify-content: center;
  }
}

.landing-products__name {
  margin: 0 0 16px;
  font-size: clamp(22px, 2vw, 28px);
  font-weight: 700;
  line-height: 1.25;
  color: var(--lp-blue-600);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.landing-products__body {
  margin-bottom: 0;
  font-size: clamp(15px, 1.05vw, 17px);
  line-height: 1.65;
  color: var(--lp-gray-600);
  height: calc(1.65em * 9);
  overflow: hidden;
}

.landing-products__body p {
  margin: 0 0 16px;
}

.landing-products__body p:last-child {
  margin-bottom: 0;
}

.landing-products__more-row {
  text-align: right;
}

.landing-products__more {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  font-size: 15px;
  color: var(--lp-blue-600);
  text-decoration: none;
  transition: color 0.2s ease;
}

.landing-products__more:hover {
  color: var(--lp-blue-800);
  text-decoration: underline;
}

.landing-products__more-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid rgba(0, 50, 126, 0.35);
  font-size: 12px;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.landing-products__more:hover .landing-products__more-icon {
  background: var(--lp-blue-600);
  border-color: var(--lp-blue-600);
  color: #fff;
}

.landing-products__tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  gap: 12px;
  margin-top: 0;
}

@media (min-width: 1024px) {
  .landing-products__tabs {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-start;
    gap: 12px;
  }

  .landing-products__tabs-break {
    display: block;
    flex-basis: 100%;
    width: 0;
    height: 0;
  }
}

.landing-products__tab {
  appearance: none;
  cursor: pointer;
  font-family: inherit;
  font-weight: 600;
  font-size: clamp(13px, 1vw, 15px);
  padding: 10px 22px;
  border-radius: 10px;
  border: 1px solid transparent;
  white-space: nowrap;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.landing-products__tab.is-active {
  background: var(--lp-blue-600);
  color: #fff;
  border-color: var(--lp-blue-600);
}

.landing-products__tab.is-active:hover,
.landing-products__tab.is-active:focus-visible {
  background: var(--lp-blue-700);
  border-color: var(--lp-blue-700);
  color: #fff;
}

.landing-products__tab--outline {
  background: #fff;
  color: var(--lp-blue-600);
  border-color: var(--lp-blue-600);
}

.landing-products__tab--outline:hover,
.landing-products__tab--outline:focus-visible {
  background: var(--lp-blue-600);
  color: #fff;
}

.landing-products__tab--muted {
  background: #fff;
  color: #64748b;
  border-color: #94a3b8;
}

.landing-products__tab--muted:hover,
.landing-products__tab--muted:focus-visible {
  background: #64748b;
  color: #fff;
  border-color: #64748b;
}

.landing-products__tab--outline:focus-visible,
.landing-products__tab--muted:focus-visible {
  outline: 2px solid var(--lp-blue-600);
  outline-offset: 2px;
}

.landing-products__sources .u-json-text {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

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

/* ---------- Advantages (icon cards grid) ---------- */
.landing-advantages {
  position: relative;
}

.landing-advantages .landing-advantages__page-title {
  color: var(--lp-blue-600);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.landing-advantages .landing-advantages__page-bar {
  background: var(--lp-blue-600);
  margin-bottom: 12px;
}

.landing-advantages__intro {
  margin: 0 auto var(--lp-bar-bottom);
  max-width: 42rem;
  text-align: center;
  font-size: clamp(16px, 1.35vw, 18px);
  line-height: 1.55;
  color: var(--lp-gray-600);
}

.landing-advantages__grid {
  display: grid;
  gap: var(--lp-gap, clamp(14px, 1.8vw, 24px));
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .landing-advantages__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .landing-advantages__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.landing-advantages__card {
  text-align: center;
  padding: clamp(22px, 2.2vw, 28px);
  background: #fff;
  border-radius: 12px;
  border: 1px solid rgba(15, 23, 42, 0.06);
  box-shadow: var(--lp-shadow-md);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

@media (hover: hover) and (pointer: fine) {
  .landing-advantages__card:hover {
    transform: translateY(-4px);
    box-shadow: var(--lp-shadow-lg);
  }
}

.landing-advantages__icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: var(--lp-blue-600);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}

.landing-advantages__card-title {
  margin: 0 0 8px;
  font-size: clamp(16px, 1.15vw, 18px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--lp-gray-800);
}

.landing-advantages__card-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.55;
  color: var(--lp-gray-600);
}

/* ---------- Project cases (4-card grid) ---------- */
.landing-cases {
  position: relative;
}

.landing-cases .landing-cases__page-title {
  color: var(--lp-blue-600);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.landing-cases .landing-cases__page-bar {
  background: var(--lp-blue-600);
  margin-bottom: 12px;
}

.landing-cases__intro {
  margin: 0 auto var(--lp-bar-bottom);
  max-width: 42rem;
  text-align: center;
  font-size: clamp(16px, 1.35vw, 18px);
  line-height: 1.55;
  color: var(--lp-gray-600);
}

.landing-cases__grid {
  display: grid;
  gap: var(--lp-gap, clamp(14px, 1.8vw, 24px));
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .landing-cases__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .landing-cases__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.landing-cases__card {
  display: flex;
  flex-direction: column;
  height: 100%;
  text-decoration: none;
  color: inherit;
  background: #fff;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--lp-shadow-md);
  transform: translateY(0);
  transition: transform 0.22s ease, box-shadow 0.22s ease;
}

.landing-cases__media {
  height: 12rem;
  flex-shrink: 0;
  background-color: #f3f4f6;
  background-size: cover;
  background-position: center;
  transform: scale(1);
  transition: transform 0.45s ease;
}

.landing-cases__body {
  padding: clamp(18px, 2vw, 24px);
  text-align: left;
}

.landing-cases__title {
  margin: 0 0 8px;
  font-size: clamp(16px, 1.15vw, 18px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--lp-gray-800);
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  overflow: hidden;
}

.landing-cases__excerpt {
  margin: 0;
  font-size: 14px;
  line-height: 1.55;
  color: var(--lp-gray-600);
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  overflow: hidden;
}

/* ---------- About Us（最初版本：左右双栏 Grid） ---------- */
.landing-about-us .landing-about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 2.6vw, 40px);
  align-items: start;
}

@media (min-width: 1024px) {
  .landing-about-us .landing-about-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.08fr);
    align-items: center;
  }
}

.landing-about-us .landing-about__col {
  min-width: 0;
}

.landing-about-us .landing-about__col--media {
  border-radius: 12px;
  overflow: hidden;
}

.landing-about-us .landing-about__col--text {
  min-width: 0;
}

.landing-about-us .landing-about__media {
  width: 100%;
  min-height: clamp(240px, 52vw, 320px);
  border-radius: 12px;
  background-color: #f3f4f6;
  background-size: cover;
  background-position: center;
  transform: scale(1);
  transition: transform 0.45s ease, box-shadow 0.22s ease;
}

@media (min-width: 1024px) {
  .landing-about-us .landing-about__media {
    min-height: clamp(260px, 26vw, 380px);
    height: clamp(260px, 26vw, 380px);
  }
}

.landing-about-us .landing-about__title {
  margin: 0 0 clamp(20px, 2vw, 24px);
  font-size: clamp(28px, 3.2vw, 40px);
  font-weight: 700;
  line-height: 1.2;
  color: var(--lp-blue-600);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.landing-about-us .landing-about__body-clip {
  margin: 0 0 clamp(24px, 2.5vw, 32px);
}

.landing-about-us .landing-about__body {
  margin: 0;
  font-size: clamp(14px, 1.05vw, 16px);
  line-height: 1.65;
  color: var(--lp-gray-600);
  word-break: break-word;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 8;
  line-clamp: 8;
  overflow: hidden;
}

.landing-about-us .landing-about__body p {
  margin: 0 0 1.5rem;
}

.landing-about-us .landing-about__body p:last-child {
  margin-bottom: 0;
}

.landing-about-us .landing-about__actions {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- Latest News（灰底 + 标题/副标题 + 卡片栅格） ---------- */
.landing-news--surface {
  background: var(--lp-gray-50);
}

.landing-news__head {
  margin-bottom: clamp(40px, 3.5vw, 64px);
  text-align: center;
}

.landing-news__page-title {
  margin: 0 0 16px;
  font-size: clamp(28px, 3.2vw, 40px);
  font-weight: 700;
  line-height: 1.2;
  color: var(--lp-blue-600);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.landing-news__intro {
  margin: 0 auto;
  max-width: 42rem;
  font-size: clamp(16px, 1.35vw, 18px);
  line-height: 1.55;
  color: var(--lp-gray-600);
}

.landing-news-grid {
  display: grid;
  gap: var(--lp-gap, clamp(14px, 1.8vw, 24px));
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .landing-news-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .landing-news-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.landing-news-card {
  background: #fff;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--lp-shadow-md);
  transition: box-shadow 0.22s ease;
}

.landing-news-card__media {
  height: 12rem;
  background-color: #f3f4f6;
  background-size: cover;
  background-position: center;
}

.landing-news-card__body {
  padding: 24px;
}

.landing-news__actions {
  margin-top: clamp(40px, 3.5vw, 48px);
  text-align: center;
}

/* Hover effects (desktop only) */
@media (hover: hover) and (pointer: fine) {
  .landing-cases__card:hover {
    transform: translateY(-6px);
    box-shadow: var(--lp-shadow-lg);
  }

  .landing-cases__card:hover .landing-cases__media {
    transform: scale(1.06);
  }

  .landing-news-card:hover {
    box-shadow: var(--lp-shadow-lg);
  }

  .landing-about-us .landing-about__col--media:hover .landing-about__media {
    transform: scale(1.03);
    box-shadow: 0 18px 44px rgba(0, 0, 0, 0.18);
  }
}

.landing-news-card__date {
  margin: 0 0 8px;
  font-size: 14px;
  line-height: 1.4;
  font-weight: 400;
  color: #6b7280;
}

.landing-news-card__title {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.35;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  overflow: hidden;
  color: var(--lp-gray-800);
}

.landing-news-card__excerpt {
  margin: 0;
  font-size: 14px;
  line-height: 1.55;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 4;
  line-clamp: 4;
  overflow: hidden;
  color: var(--lp-gray-600);
}

/* 页脚背景由 footer.css 控制 */

.landing-section {
  padding: var(--lp-section-pad-y) 0;
}

.landing-section__title {
  margin-bottom: var(--lp-title-bar-gap);
  font-size: clamp(28px, 3.2vw, 40px);
}

.landing-section__bar {
  margin-bottom: var(--lp-bar-bottom);
}

.landing-hero__title {
  font-size: clamp(34px, 5.2vw, 72px);
}

.landing-hero__lead {
  font-size: clamp(16px, 2.2vw, 32px);
}

/* 大屏：标题/正文 clamp 上限提高 + 卡片略图高度随屏变（与 zoom、宽容器叠加） */
@media (min-width: 2200px) {
  body.landing-page .landing-hero__title {
    font-size: clamp(44px, 5.6vw, 106px);
  }

  body.landing-page .landing-hero__lead {
    font-size: clamp(19px, 2.25vw, 47px);
  }

  body.landing-page .landing-section__title,
  body.landing-page .landing-products__page-title,
  body.landing-page .landing-advantages__page-title,
  body.landing-page .landing-cases__page-title,
  body.landing-page .landing-news__page-title,
  body.landing-page .landing-about-us .landing-about__title {
    font-size: clamp(36px, 2.8vw, 68px);
  }

  body.landing-page .landing-products__intro,
  body.landing-page .landing-advantages__intro,
  body.landing-page .landing-cases__intro,
  body.landing-page .landing-news__intro {
    font-size: clamp(19px, 1.25vw, 31px);
    max-width: 48rem;
  }

  body.landing-page .landing-products__name {
    font-size: clamp(27px, 2.1vw, 45px);
  }

  body.landing-page .landing-products__body,
  body.landing-page .landing-about-us .landing-about__body {
    font-size: clamp(18px, 1.15vw, 28px);
  }

  body.landing-page .landing-products__more {
    font-size: clamp(17px, 1.02vw, 27px);
  }

  body.landing-page .landing-products__tab {
    font-size: clamp(15px, 1.02vw, 24px);
    padding: 12px 26px;
  }

  body.landing-page .landing-products__grid {
    gap: clamp(32px, 2.4vw, 56px);
  }

  body.landing-page .landing-advantages__card-title {
    font-size: clamp(19px, 1.18vw, 29px);
  }

  body.landing-page .landing-advantages__card-text {
    font-size: clamp(16px, 1.08vw, 24px);
  }

  body.landing-page .landing-advantages__icon {
    width: 72px;
    height: 72px;
    font-size: 25px;
  }

  body.landing-page .landing-cases__title {
    font-size: clamp(19px, 1.18vw, 29px);
  }

  body.landing-page .landing-cases__excerpt {
    font-size: clamp(16px, 1.08vw, 24px);
  }

  body.landing-page .landing-cases__media {
    height: clamp(12rem, 12vw, 19rem);
  }

  body.landing-page .landing-cases__body {
    padding: clamp(20px, 1.8vw, 28px);
  }

  body.landing-page .landing-news-card__title {
    font-size: clamp(19px, 1.18vw, 30px);
  }

  body.landing-page .landing-news-card__date {
    font-size: clamp(15px, 0.95vw, 23px);
  }

  body.landing-page .landing-news-card__excerpt {
    font-size: clamp(16px, 1.08vw, 24px);
  }

  body.landing-page .landing-news-card__media {
    height: clamp(12rem, 11vw, 18rem);
  }

  body.landing-page .landing-news-card__body {
    padding: clamp(18px, 1.6vw, 28px);
  }

  body.landing-page .landing-about-us__stat-value {
    font-size: clamp(25px, 1.92vw, 43px);
  }

  body.landing-page .landing-about-us__stat-label {
    font-size: clamp(14px, 1.12vw, 23px);
  }

  body.landing-page .landing-about-us .landing-about__media {
    min-height: clamp(300px, 22vw, 420px);
    height: clamp(300px, 22vw, 420px);
  }

  body.landing-page .landing-btn--sm {
    font-size: clamp(16px, 1.08vw, 25px);
    padding: clamp(10px, 1.2vw, 14px) clamp(16px, 2.4vw, 36px);
  }

  body.landing-page .landing-btn--md {
    font-size: clamp(17px, 1.12vw, 27px);
    padding: clamp(10px, 1.2vw, 14px) clamp(18px, 2.6vw, 38px);
  }

  body.landing-page .landing-hero__arrow {
    width: 52px;
    height: 52px;
  }

  body.landing-page .landing-hero__arrow i {
    font-size: 20px;
  }

  body.landing-page .landing-hero__dot {
    width: 12px;
    height: 12px;
  }
}

@media (min-width: 2800px) {
  body.landing-page .landing-hero__title {
    font-size: clamp(48px, 5.4vw, 118px);
  }

  body.landing-page .landing-hero__lead {
    font-size: clamp(21px, 2.15vw, 52px);
  }

  body.landing-page .landing-section__title,
  body.landing-page .landing-products__page-title,
  body.landing-page .landing-advantages__page-title,
  body.landing-page .landing-cases__page-title,
  body.landing-page .landing-news__page-title,
  body.landing-page .landing-about-us .landing-about__title {
    font-size: clamp(41px, 2.75vw, 76px);
  }

  body.landing-page .landing-about-us .landing-about__media {
    min-height: clamp(340px, 24vw, 480px);
    height: clamp(340px, 24vw, 480px);
  }

  body.landing-page .landing-cases__media {
    height: clamp(14rem, 13vw, 24rem);
  }

  body.landing-page .landing-news-card__media {
    height: clamp(13rem, 12vw, 22rem);
  }

  body.landing-page .landing-hero__arrow {
    width: 56px;
    height: 56px;
  }

  body.landing-page .landing-hero__arrow i {
    font-size: 22px;
  }
}

/* ------------------------------------------------------------
   Responsive breakpoints (large → small)
------------------------------------------------------------ */

/* 3. 大屏手机 / 横屏手机 */
@media (max-width: 640px) {
  .landing-cases__title {
    font-size: 16px;
  }

  .landing-btn--md,
  .landing-btn--sm {
    padding: 10px 20px;
  }
}

/* 2. 普通手机（主流竖屏）*/
@media (max-width: 480px) {
  .landing-section__bar {
    margin-bottom: 20px;
  }

  .landing-news-card__title {
    font-size: 18px;
  }
}

/* 1. 小屏手机（iPhone SE / 安卓小屏）*/
@media (max-width: 375px) {
  .landing-btn--md,
  .landing-btn--sm {
    padding: 10px 18px;
  }
}