/* ========== CSS Variables / Design Tokens ========== */
:root {
  --brand-blue: #04409b;
  --brand-teal: #40a7eb;
  --brand-gradient: linear-gradient(135deg, #1a6fd4 0%, #2ba89a 100%);
  --brand-gradient-h: linear-gradient(135deg, #1560b8 0%, #239487 100%);
  --btn-bg: linear-gradient(90deg, #1b72d1 0%, #2aa49d 100%);
  --brand-light: #e8f4fd;
  --brand-lighter: #f4fafe;
  --brand-mid: #c5e3f6;
  --text-primary: #000000;
  --text-secondary: #6b6b6b;
  --text-light: #8e9cb2;
  --white: #ffffff;
  --bg-page: #f8fafc;
  --bg-card: #ffffff;
  --border: #e1e1e1;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06), 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.08), 0 4px 8px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 48px rgba(0, 0, 0, 0.1);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 12px;
  --radius-xl: 24px;
  --font-sans:
  'Microsoft YaHei', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
  'Hiragino Sans GB', 'Helvetica Neue', Arial, sans-serif;
  --max-width: 1320px;
  --nav-height: 71px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========== Reset & Base ========== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a {
  text-decoration: none;
  color: inherit;
}
img {
  max-width: 100%;
  display: block;
}
ul,
ol {
  list-style: none;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
}

/* ========== Section Titles ========== */
.section-label {
  display: inline-block;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
  border: 1px solid;
  border-color: #d5d5d5;
  border-radius: 20px;
  padding: 0px 16px;
}
.section-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  letter-spacing: 0.1em;
}
.section-subtitle {
  font-size: 14px;
  color: var(--text-secondary);
  max-width: 600px;
}
.section-header {
  text-align: center;
  margin-bottom: 35px;
}
.section-header .section-subtitle {
  margin: 0 auto;
}

/* ========== Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 15px;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}
.btn-primary {
  background: var(--brand-gradient);
  color: var(--white);
}
.btn-primary:hover {
  transform: translateY(-2px);
}
.btn-primary:active {
  transform: translateY(0);
}
.btn-outline {
  background: transparent;
  color: #1b72d0;
  border: 2px solid #1b72d0;
}
.btn-outline:hover {
  background: #1b72d0;
  color: var(--white);
}
.btn-lg {
  font-size: 22px;
  border-radius: var(--radius-lg);
  letter-spacing: 0.05em;
  padding: 16px 32px;
}

.btn-lg.apply {
  width: 196px;
  height: 62px;
  background: linear-gradient(90deg, #1b72d1 0%, #2aa49d 100%);
}

.btn-lg.learn {
  width: 151px;
  height: 62px;
  border: 2px solid;
  border-color: #1b72d0;
}

/* ========== Navbar ========== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  transition: all var(--transition);
}
.navbar.scrolled {
  box-shadow: var(--shadow-md);
}
.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
}
.nav-logo .logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: var(--brand-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 18px;
  font-weight: 800;
  flex-shrink: 0;
}
.nav-links {
  display: flex;
  gap: 36px;
}
.nav-links a {
  font-size: 15px;
  font-weight: 500;
  transition: color var(--transition);
  position: relative;
  line-height: normal;
  color: #484848;
  font-size: 16px;
}

.nav-links.open a {
  border-bottom: 1px solid #d2d2d2c7;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--brand-blue);
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--brand-gradient);
  border-radius: 1px;
  transform: scaleX(0);
  transition: transform var(--transition);
}
.nav-links a:hover::after,
.nav-links a.active::after {
  transform: scaleX(1);
}
.nav-cta {
  padding: 7px 12px 5px;
  margin-left: 12px;
  width: 107px;
  height: 32px;
  background: var(--btn-bg);
  border-radius: 4px;
  font-weight: 55;
  color: #ffffff;
  font-size: 14px;
}
.nav-mobile-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--brand-gradient);
  cursor: pointer;
  border: none;
  color: #fff;
  margin-left: 8px;
  flex-shrink: 0;
  transition: background 0.2s;
}
.nav-mobile-toggle:active {
  background: #e0e0e0;
}
.nav-mobile-toggle svg {
  width: 18px;
  height: 18px;
}
.nav-mobile-toggle svg line {
  transition:
          transform 0.3s,
          opacity 0.3s;
  transform-origin: center;
}
.nav-mobile-cta {
  display: none;
}

/* ========== Hero ========== */
.hero {
  height: 600px;
  margin-top: var(--nav-height);
  padding-top: 79px;
  padding-bottom: 114px;
  position: relative;
  overflow: hidden;
  background: url('../../img/hxy/banner.png');
}

.hero .container {
  display: flex;
  align-items: center;
  gap: 64px;
  position: relative;
  z-index: 1;
}
.hero-content {
  flex: 1;
  max-width: 600px;
}
.hero-badge {
  position: relative;
  padding: 1px 12px 2px 20px;
  color: #1c76cd;
  font-size: 13px;
  margin-bottom: 17px;
  width: 208px;
  height: 26px;
  background: linear-gradient(90deg, rgba(27, 114, 208, 0.08) 0%, rgba(42, 164, 158, 0.08) 100%);
  border-radius: 12px 12px 12px 0px;
  color: #1c76cd;
  letter-spacing: 0.05em;
  font-size: 14px;
}
.hero-badge::before {
  position: absolute;
  top: 10px;
  left: 10px;
  content: '';
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: #1c76cdff;
  animation: pulse-dot 2s infinite;
}
@keyframes pulse-dot {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.5;
    transform: scale(1.3);
  }
}
.hero-title {
  font-size: 58px;
  font-weight: 800;
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.hero-title div:first-child {
  width: 348px;
  height: 76px;
  line-height: normal;
  font-family: Microsoft YaHei;
  font-weight: 700;
  color: #000000;
  font-size: 56px;
}

.hero-title div:last-child {
  width: 522px;
  margin-top: 8px;
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: 56px;
}
.hero-stats-list {
  display: flex;
  row-gap: 20px;
  column-gap: 36px;
  margin-bottom: 53px;
  flex-wrap: wrap;
}
.hero-stat-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 17px;
  color: var(--text-primary);
  font-weight: 500;
}
.hero-stat-item .stat-icon {
  width: 24px;
  height: 24px;
  background: url('../../img/hxy/check.png') center no-repeat;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.hero-stat-item .stat-icon svg {
  width: 14px;
  height: 14px;
}
.hero-stat-item strong {
  font-size: 18px;
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-actions {
  display: flex;
  gap: 16px;
  align-items: center;
}
.hero-visual {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.hero-illustration {
  width: 100%;
  max-width: 520px;
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, rgba(26, 111, 212, 0.08) 0%, rgba(43, 168, 154, 0.08) 100%);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(26, 111, 212, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.hero-illustration .dash-preview {
  width: 80%;
  height: 65%;
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.hero-illustration .dash-preview .dp-bar {
  height: 10px;
  background: linear-gradient(90deg, #e8f4fd 0%, #c5e3f6 100%);
  border-radius: 5px;
}
.hero-illustration .dash-preview .dp-bar:nth-child(1) {
  width: 100%;
}
.hero-illustration .dash-preview .dp-bar:nth-child(2) {
  width: 75%;
}
.hero-illustration .dash-preview .dp-bar:nth-child(3) {
  width: 90%;
}
.hero-illustration .dash-preview .dp-card-row {
  display: flex;
  gap: 8px;
  margin-top: 4px;
}
.hero-illustration .dash-preview .dp-card {
  flex: 1;
  height: 40px;
  background: linear-gradient(135deg, #e8f4fd, #f4fafe);
  border-radius: 6px;
  border: 1px solid #e2e8f0;
}
.hero-illustration .dash-preview .dp-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 8px;
}
.hero-illustration .dash-preview .dp-cell {
  height: 32px;
  background: #f8fafc;
  border-radius: 6px;
  border: 1px dashed #e2e8f0;
}
.hero-floating-1 {
  position: absolute;
  top: -20px;
  right: -20px;
  width: 80px;
  height: 80px;
  background: var(--brand-gradient);
  border-radius: 20px;
  opacity: 0.15;
  transform: rotate(15deg);
}
.hero-floating-2 {
  position: absolute;
  bottom: -15px;
  left: -15px;
  width: 60px;
  height: 60px;
  background: var(--brand-gradient);
  border-radius: 16px;
  opacity: 0.12;
  transform: rotate(-10deg);
}

/* ========== Stats Bar ========== */
.stats-bar {
  padding: 0;
  position: relative;
  z-index: 2;
  margin-top: -36px;
}
.stats-bar .container {
  height: 130px;
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 30px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  flex: 1;
  position: relative;
}
.stat-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0;
  top: 20%;
  height: 60%;
  width: 1px;
  background: #b5b5b5;
}
.stat-number {
  font-size: 28px;
  font-weight: 800;
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}
.stat-label {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 500;
}

/* Stats carousel arrows – hidden by default, shown on mobile */
.stats-arrow {
  display: none;
}

/* ========== Platforms ========== */
.platforms {
  padding: 80px 0;
  background: var(--white);
}
.platforms-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 24px;
  margin-bottom: 20px;
}
.platform-item {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  transition: all var(--transition);
  cursor: default;
  text-align: center;
  min-height: 56px;
  width: 168px;
}
.platform-icon {
  width: 132px;
  height: 40px;
}
.platform-item:hover {
  border-color: var(--brand-blue);
  color: var(--brand-blue);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.platform-note {
  text-align: center;
  color: var(--text-light);
  margin-top: 16px;
  font-family: Microsoft YaHei;
  color: #6b6b6b;
  font-size: 14px;
}

/* ========== Features Grid (Section 5) ========== */
.features {
  padding: 80px 0;
  background: var(--brand-lighter);
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  --notch-size: 76px;
  --icon-size: 62px;
  position: relative;
  transition: transform var(--transition);
}
.feature-card:hover {
  transform: translateY(-4px);
}
.feature-card:hover .feature-card__shape {
  filter: drop-shadow(0 6px 16px rgba(24, 52, 86, 0.1));
}
.feature-card__shape {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
  pointer-events: none;
  transition: filter 0.3s;
}
.feature-card__path {
  fill: var(--white);
}
.feature-card__content {
  position: relative;
  z-index: 1;
  padding: 28px;
}
.feature-card__content::before {
  content: '';
  float: right;
  width: var(--notch-size);
  height: var(--notch-size);
}
.feature-card-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 20px;
  line-height: 1.3;
}
.feature-card__icon {
  position: absolute;
  z-index: 2;
  top: 0;
  right: 0;
  width: var(--icon-size);
  height: var(--icon-size);
  perspective: 800px;
  cursor: pointer;
}
.feature-card__icon-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.55s cubic-bezier(0.2, 0.8, 0.2, 1);
  transform-style: preserve-3d;
}
.feature-card:hover .feature-card__icon-inner {
  transform: rotateY(180deg);
}
.feature-card__icon-face {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  border-radius: 12px;
  color: #fff;
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  backface-visibility: hidden;
}
.feature-card__icon-face img {
  width: 36px;
  height: 36px;
}
.feature-card__icon-face.front {
  background: rgba(226, 240, 255, 1);
}
.feature-card__icon-face.front img {
  filter: brightness(0) saturate(100%) invert(42%) sepia(80%) saturate(2000%) hue-rotate(190deg)
  brightness(92%) contrast(90%);
}
.feature-card__icon-face.back {
  background: linear-gradient(135deg, rgba(27, 115, 209, 0.8), rgba(42, 164, 158, 0.8));
  transform: rotateY(180deg);
}
.feature-card__icon-face.back img {
  filter: brightness(0) invert(1);
}
.feature-sub-item {
  margin-bottom: 12px;
}
.feature-sub-item:last-child {
  margin-bottom: 0;
}
.feature-sub-item .sub-title {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 4px;
}
.feature-sub-item .sub-desc {
  font-size: 14px;
  color: #949494;
  line-height: 1.6;
}

/* ========== Highlights ========== */
.highlights {
  padding: 80px 0;
  background: var(--white);
}
.highlight-row {
  display: flex;
  align-items: center;
  gap: 64px;
  padding: 16px 0;
}

.highlight-row:not(:first-child, :last-child) {
  padding: 48px 0;
}

.highlight-row:first-child {
  padding: 0;
}

.highlight-row:last-child {
  border-bottom: none;
}
.highlight-row.reverse {
  flex-direction: row-reverse;
}

/* 覆盖 fade-up，改用自定义滑入动画 */
.highlight-row.fade-up {
  opacity: 1;
  transform: none;
  transition: none;
}

/* 子元素初始状态：不可见 */
.highlight-row .highlight-image {
  opacity: 0;
  transform: translateX(-60px);
}
.highlight-row .highlight-visual {
  transform: scale(1.08);
  transition: transform 0.9s cubic-bezier(0.22, 1, 0.36, 1);
}
.highlight-row .highlight-text {
  opacity: 0;
  transform: translateX(60px);
}
.highlight-row .highlight-number {
  opacity: 0;
  transform: translateY(-16px);
}

/* reverse 行：方向对调 */
.highlight-row.reverse .highlight-image {
  transform: translateX(60px);
}
.highlight-row.reverse .highlight-text {
  transform: translateX(-60px);
}

/* 关键帧 */
@keyframes hl-slide-in-left {
  to {
    opacity: 1;
    transform: translateX(0);
  }
}
@keyframes hl-slide-in-right {
  to {
    opacity: 1;
    transform: translateX(0);
  }
}
@keyframes hl-fade-down {
  to {
    opacity: 0.2;
    transform: translateY(0);
  }
}

/* 触发状态：进入可视区 */
.highlight-row.in-view .highlight-image {
  animation: hl-slide-in-left 0.8s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}
.highlight-row.in-view .highlight-visual {
  transform: scale(1);
}
.highlight-row.in-view .highlight-text {
  animation: hl-slide-in-right 0.8s cubic-bezier(0.22, 1, 0.36, 1) 0.15s forwards;
}
.highlight-row.in-view .highlight-number {
  animation: hl-fade-down 0.6s ease 0.3s forwards;
}

/* reverse 行：图片从右滑入，文案从左滑入 */
.highlight-row.reverse.in-view .highlight-image {
  animation-name: hl-slide-in-right;
}
.highlight-row.reverse.in-view .highlight-text {
  animation-name: hl-slide-in-left;
}

.highlight-image {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.highlight-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  border-radius: 12px;
}
.highlight-visual img {
  width: 100%;
  height: 100%;
}
.highlight-visual .hl-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  padding: 4px 12px;
  border-radius: 100px;
  background: var(--brand-gradient);
  color: white;
  font-size: 12px;
  font-weight: 600;
}
.highlight-visual .hl-content {
  font-size: 14px;
  color: var(--text-light);
  text-align: center;
}
.highlight-text {
  flex: 1;
}
.highlight-number {
  font-size: 48px;
  font-weight: 700;
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: -20px;
  letter-spacing: 0.1rem;
}
.highlight-text h3 {
  font-size: 26px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
  letter-spacing: 0.5px;
}
.highlight-text p {
  width: 624px;
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ========== Why Us ========== */
.why-us {
  padding: 80px 0;
  background: url('../../img/hxy/why_us_bg.png') 100% 100%;
  background-size: cover;
}
.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px 48px;
  perspective: 1000px;
}

/* 覆盖 fade-up */
.why-card.fade-up {
  opacity: 1;
  transform: none;
  transition: all var(--transition);
}

/* 初始状态：不可见 */
.why-card {
  background: transparent;
  border-radius: 15px;
  padding: 30px;
  border: 1px solid #aec9e9;
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 408px;
  height: 250px;
  transform: perspective(1000px) rotateX(10deg) translateY(30px);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}
.why-card:hover {
  background: var(--white);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

/* 子元素初始状态 */
.why-card-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  opacity: 0;
  transform: scale(0.3);
}
.why-card h4 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  opacity: 0;
  transform: translateY(12px);
}
.why-card p {
  font-size: 14px;
  color: #949494;
  line-height: 1.5;
  flex: 1;
  opacity: 0;
  transform: translateY(12px);
}

/* 关键帧 */
@keyframes why-card-in {
  to {
    opacity: 1;
    transform: none; /* 移除 perspective，恢复 2D 渲染上下文，防止文字模糊 */
  }
}
@keyframes why-icon-pop {
  0% {
    opacity: 0;
    transform: scale(0.3);
  }
  60% {
    opacity: 1;
    transform: scale(1.15);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}
@keyframes why-text-in {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 触发状态：交错入场 */
.why-card.in-view {
  animation: why-card-in 0.45s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}
.why-card.in-view .why-card-icon {
  animation: why-icon-pop 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) 0.18s forwards;
}
.why-card.in-view h4 {
  animation: why-text-in 0.3s ease 0.25s forwards;
}
.why-card.in-view p {
  animation: why-text-in 0.3s ease 0.32s forwards;
}

/* 交错延迟：每张卡片依次延后 0.08s */
.why-grid .why-card:nth-child(1).in-view {
  animation-delay: 0s;
}
.why-grid .why-card:nth-child(2).in-view {
  animation-delay: 0.08s;
}
.why-grid .why-card:nth-child(3).in-view {
  animation-delay: 0.16s;
}
.why-grid .why-card:nth-child(4).in-view {
  animation-delay: 0.24s;
}
.why-grid .why-card:nth-child(5).in-view {
  animation-delay: 0.32s;
}
.why-grid .why-card:nth-child(6).in-view {
  animation-delay: 0.4s;
}

/* 子元素延迟跟随卡片序号递增 */
.why-grid .why-card:nth-child(1).in-view .why-card-icon {
  animation-delay: 0.18s;
}
.why-grid .why-card:nth-child(1).in-view h4 {
  animation-delay: 0.25s;
}
.why-grid .why-card:nth-child(1).in-view p {
  animation-delay: 0.32s;
}

.why-grid .why-card:nth-child(2).in-view .why-card-icon {
  animation-delay: 0.26s;
}
.why-grid .why-card:nth-child(2).in-view h4 {
  animation-delay: 0.33s;
}
.why-grid .why-card:nth-child(2).in-view p {
  animation-delay: 0.4s;
}

.why-grid .why-card:nth-child(3).in-view .why-card-icon {
  animation-delay: 0.34s;
}
.why-grid .why-card:nth-child(3).in-view h4 {
  animation-delay: 0.41s;
}
.why-grid .why-card:nth-child(3).in-view p {
  animation-delay: 0.48s;
}

.why-grid .why-card:nth-child(4).in-view .why-card-icon {
  animation-delay: 0.42s;
}
.why-grid .why-card:nth-child(4).in-view h4 {
  animation-delay: 0.49s;
}
.why-grid .why-card:nth-child(4).in-view p {
  animation-delay: 0.56s;
}

.why-grid .why-card:nth-child(5).in-view .why-card-icon {
  animation-delay: 0.5s;
}
.why-grid .why-card:nth-child(5).in-view h4 {
  animation-delay: 0.57s;
}
.why-grid .why-card:nth-child(5).in-view p {
  animation-delay: 0.64s;
}

.why-grid .why-card:nth-child(6).in-view .why-card-icon {
  animation-delay: 0.58s;
}
.why-grid .why-card:nth-child(6).in-view h4 {
  animation-delay: 0.65s;
}
.why-grid .why-card:nth-child(6).in-view p {
  animation-delay: 0.72s;
}

/* ========== Partners ========== */
.partners {
  padding: 80px 0;
  background: var(--white);
}
.partners-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 24px;
}
.partner-card {
  background: var(--white);
  border-radius: var(--radius-lg, 16px);
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  transition:
          transform var(--transition),
          box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}
.partner-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.14);
}
.partner-card-cover {
  height: 156px;
  background-color: #f3f4f6;
  background-size: contain;
  background-position: center;
  background-repeat: no-repeat;
  flex-shrink: 0;
}
.partner-card-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.partner-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.partner-card-logo {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--brand-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  overflow: hidden;
  font-size: 16px;
  font-weight: 700;
  color: white;
}
.partner-card-logo img {
  width: 100%;
  height: 100%;
}
.partner-card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}
.partner-card-desc {
  font-size: 14px;
  line-height: 1.5;
  color: #6d6d6d;
  margin: 0 0 12px;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 11;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.partner-card-link {
  font-size: 14px;
  color: #1b73d1;
  text-decoration: none;
  align-self: flex-start;
  transition: color var(--transition);
}
.partner-card-link:hover {
  color: var(--brand-teal);
}
.partner-more {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 40px;
  border-radius: var(--radius-md);
  border: 2px dashed var(--border);
  font-size: 15px;
  font-weight: 600;
  color: var(--brand-blue);
  cursor: pointer;
  transition: all var(--transition);
}
.partner-more:hover {
  border-color: var(--brand-blue);
  background: rgba(26, 111, 212, 0.04);
}

/* ========== Process ========== */
.process {
  height: 500px;
  background: url('../../img/hxy/process_bg.png') no-repeat;
  background-size: 100% 100%;
  box-sizing: border-box;
  padding: 58px 0;
}
.process-steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0;
  position: relative;
  margin-bottom: 33px;
  padding: 0 120px;
}
.process-step-line {
  position: relative;
  align-self: stretch;
}
.process-step-line::before {
  content: '';
  position: absolute;
  top: 17px;
  left: -7.5vw;
  right: 2px;
  height: 1px;
  background-color: #c5c5c5;
  width: 15vw;
}
.process-step {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  z-index: 1;
  padding: 0;
}
.process-step-num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--brand-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 20px;
  box-shadow: 0 8px 24px rgba(26, 111, 212, 0.2);
  position: relative;
}
.process-step-num::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 2px solid rgba(26, 111, 212, 0.15);
}
.process-step h4 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}
.process-step p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}
.process-cta {
  text-align: center;
  .btn {
    width: 256px;
    height: 62px;
    border-radius: 12px;
    font-size: 24px;
    font-weight: 400;
    padding: 15px 57px;
    position: relative;
    overflow: hidden;
  }
}
@keyframes btn-shimmer {
  0% {
    left: -100%;
  }
  60% {
    left: 120%;
  }
  100% {
    left: 120%;
  }
}
.process-cta .btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  transform: skewX(-20deg);
  background: linear-gradient(
          90deg,
          transparent 0%,
          rgba(255, 255, 255, 0.15) 40%,
          rgba(255, 255, 255, 0.35) 50%,
          rgba(255, 255, 255, 0.15) 60%,
          transparent 100%
  );
  pointer-events: none;
  z-index: 1;
}
.process-cta.visible .btn::before {
  animation: btn-shimmer 3s ease-in-out 1s infinite;
}

/* ========== Footer ========== */
.footer {
  background: #1a2a45ff;
  color: rgba(255, 255, 255, 0.7);
  padding: 56px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 30px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 16px;
  width: 125px;
  height: 36px;

  img {
    width: 100%;
    height: 100%;
  }
}
.footer-brand .footer-logo .logo-icon {
  width: 34px;
  height: 34px;
  border-radius: 7px;
  background: var(--brand-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 16px;
  font-weight: 800;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  max-width: 541px;
}

.footer-links {
  padding-left: 90px;
}

.footer-links h4 {
  font-size: 15px;
  font-weight: 600;
  color: white;
  margin-bottom: 20px;
}
.footer-links a {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  margin-bottom: 10px;
  transition: color var(--transition);
}
.footer-links a:hover {
  color: white;
}
.footer-link-icon {
  width: 16px;
  height: 16px;
  object-fit: contain;
  flex-shrink: 0;
  display: none;
}
@keyframes slide-right-loop {
  0% {
    transform: translateX(-10px);
    opacity: 0;
  }
  30% {
    opacity: 1;
  }
  70% {
    opacity: 1;
  }
  100% {
    transform: translateX(6px);
    opacity: 0;
  }
}
.footer-links a:hover .footer-link-icon {
  display: block;
  animation: slide-right-loop 0.9s ease-in-out infinite;
}
.footer-contact h4 {
  font-size: 15px;
  font-weight: 600;
  color: white;
  margin-bottom: 20px;
}
.footer-contact-item {
  display: flex;
  line-height: 1.8;
  margin-bottom: 6px;
  color: #c2c2c2;
  font-size: 14px;
}
.footer-contact-label {
  flex-shrink: 0;
  margin-right: 4px;
}
.footer-contact-value {
  display: flex;
  flex-direction: column;
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 0;
  font-size: 13px;
  color: #c2c2c2;
  column-gap: 30px;
}
.footer-bottom a {
  transition: color var(--transition);
}
.footer-bottom a:hover {
  color: var(--white);
}

/* ========== Sidebar ========== */
.sidebar {
  position: fixed;
  right: 20px;
  bottom: 100px;
  z-index: 999;
  display: flex;
  flex-direction: column;
  background: var(--white);
  border-radius: 12px;
  box-shadow: 0px 3px 6px rgba(0, 0, 0, 0.1);
  padding: 5px 4px;
}
.sidebar-item {
  padding: 8px 0;
  width: 32px;
  height: 32px;
  background: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background var(--transition);
  position: relative;
}
.sidebar-item:has(+ .sidebar-item)::after {
  position: absolute;
  bottom: -8px;
  left: 8px;
  content: '';
  margin-bottom: 8px;
  display: block;
  width: 16px;
  height: 1px;
  background: #e1e1e1;
}
.sidebar-item:hover {
  background: #f5f7fa;
}
.sidebar-item:last-child:hover {
  background: #f5f7fa;
}

.sidebar-item img.sidebar-icon {
  width: 16px;
  height: 16px;
  object-fit: contain;
  transition: filter var(--transition);
  filter: brightness(0) saturate(100%) invert(30%) sepia(10%) saturate(1000%) hue-rotate(180deg)
  brightness(90%) contrast(85%);
}
.sidebar-item:hover img.sidebar-icon {
  filter: brightness(0) saturate(100%) invert(30%) sepia(10%) saturate(1000%) hue-rotate(180deg)
  brightness(90%) contrast(85%);
}
.sidebar-tooltip {
  position: absolute;
  right: 60px;
  white-space: nowrap;
  background: var(--text-primary);
  color: white;
  font-size: 13px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  opacity: 0;
  pointer-events: none;
  transform: translateX(8px) scale(0.85);
  transition:
          opacity 0.25s cubic-bezier(0.34, 1.56, 0.64, 1),
          transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.sidebar-item:hover .sidebar-tooltip {
  opacity: 1;
  transform: translateX(0) scale(1);
}
.sidebar-qr-popup {
  position: absolute;
  right: 40px;
  bottom: 0;
  width: 250px;
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
  opacity: 0;
  pointer-events: none;
  transform: translateX(8px) scale(0.9);
  transition:
          opacity 0.3s cubic-bezier(0.34, 1.56, 0.64, 1),
          transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.sidebar-qr-trigger:hover .sidebar-qr-popup {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(0) scale(1);
}
.sidebar-qr-placeholder {
  width: 200px;
  height: 200px;
  border-radius: 8px;
  border: 1px dashed var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: var(--text-light);
  margin: 0 auto 0px;
  img {
    width: 100%;
    height: 100%;
  }
}
.sidebar-qr-popup span {
  font-size: 12px;
  color: var(--text-secondary);
}
/* 移动端按钮组 – PC端默认隐藏 */
.sidebar-mobile-btns {
  display: none;
}

/* ========== Responsive ========== */

/* --- Tablet & small desktop (≤1024px) --- */
@media (max-width: 1024px) {
  .container {
    padding: 0 24px;
  }
  .hero .container {
    flex-direction: column;
    text-align: center;
  }
  .hero-content {
    max-width: 100%;
  }
  .hero-stats-list {
    align-items: center;
    justify-content: center;
  }
  .hero-actions {
    justify-content: center;
  }
  .hero-illustration {
    max-width: 400px;
  }
  .hero-title {
    font-size: 36px;
  }
  .hero-badge {
    margin-left: auto;
    margin-right: auto;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .why-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .why-card {
    width: auto;
    height: auto;
  }
  .partners-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .platforms-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .platform-item {
    width: auto;
  }
  .highlight-row {
    flex-direction: column !important;
    gap: 32px;
    text-align: center;
  }
  .highlight-image {
    order: -1;
    width: 100%;
  }
  .highlight-visual {
    width: 100%;
    max-width: 480px;
    height: auto;
    aspect-ratio: 648 / 354;
  }
  .highlight-visual img {
    width: 100%;
    height: 100%;
    object-fit: contain;
  }
  .highlight-text p {
    width: 100%;
  }
  .highlight-text h3 br {
    display: none;
  }
  /* 移动端：左右滑入改为从下方滑入 */
  .highlight-row .highlight-image,
  .highlight-row .highlight-text {
    transform: translateY(40px);
  }
  .highlight-row.reverse .highlight-image,
  .highlight-row.reverse .highlight-text {
    transform: translateY(40px);
  }
  @keyframes hl-slide-in-up {
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
  .highlight-row.in-view .highlight-image,
  .highlight-row.reverse.in-view .highlight-image {
    animation: hl-slide-in-up 0.7s cubic-bezier(0.22, 1, 0.36, 1) forwards;
  }
  .highlight-row.in-view .highlight-text,
  .highlight-row.reverse.in-view .highlight-text {
    animation: hl-slide-in-up 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.15s forwards;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .stats-bar .container {
    flex-wrap: wrap;
    gap: 24px;
    padding: 28px 36px;
  }
  .stat-item {
    flex: 0 0 auto;
    min-width: 120px;
  }
  .stat-item:not(:last-child)::after {
    display: none;
  }
  .section-header {
    margin-bottom: 40px;
  }
}

/* --- Mobile (≤768px) --- */
@media (max-width: 768px) {
  html,
  body {
    overflow-x: hidden; /* 防止轮播等横向滚动元素导致页面出现X轴滚动条 */
  }
  .navbar {
    height: unset;
  }

  .navbar .container {
    height: 6rem;
    padding: 0 2rem;
  }

  .navbar .container .nav-logo {
    width: 10.0625rem;
    height: 3rem;
  }

  .navbar .container .nav-logo img {
    width: 100%;
    height: 100%;
  }

  .nav-links {
    display: none !important;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    flex-direction: column;
    padding: 0px 24px;
    gap: 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    box-shadow: var(--shadow-md);
    z-index: 1002;
  }
  .nav-links.open {
    display: flex !important;
  }
  .nav-links a {
    padding: 14px 0;
    font-size: 15px;
  }
  .nav-links a:last-child {
    border-bottom: none;
  }
  .nav-links a::after {
    display: none;
  }
  .nav-links a:hover,
  .nav-links a.active {
    color: var(--brand-blue);
  }
  .nav-cta {
    display: none;
  }
  .nav-mobile-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 10.25rem;
    height: 4rem;
    padding: 0;
    background: #ffffff;
    border: 1px solid #006fcf;
    border-radius: 2rem;
    color: #006fcf;
    font-size: 1.75rem;
    font-family: Microsoft YaHei;
    line-height: 1.375rem;
    text-decoration: none;
    white-space: nowrap;
    margin-left: auto;
    transition: background 0.2s;
  }
  .nav-mobile-cta:active {
    background: rgba(4, 64, 155, 0.06);
  }
  .nav-mobile-toggle {
    display: flex !important;
    color: #fff;
    width: 4rem;
    height: 4rem;
    margin-left: 1rem;
  }

  .nav-mobile-toggle svg {
    width: 2rem;
    height: 1.6494rem;
  }
  .nav-mobile-toggle.active svg line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
    transform-origin: center;
  }
  .nav-mobile-toggle.active svg line:nth-child(2) {
    opacity: 0;
  }
  .nav-mobile-toggle.active svg line:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
    transform-origin: center;
  }

  /* Hero */
  .hero {
    height: 25rem;
    margin-top: 6rem;
    padding-top: 3.125rem;
    padding-bottom: 0;
    background-size: cover;
    background: url('../../img/hxy/banner_m.png');
  }

  .hero .container {
    padding: 0;
  }

  .hero-title {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 0.675rem;
  }

  .hero-content .hero-title div {
    height: 3.6875rem;
    line-height: normal;
    font-weight: 600;
    font-size: 2.625rem;
  }

  .hero-title div:first-child {
    color: #000000;
  }

  .hero-title div:last-child {
    margin-top: 0.125rem;
    background: var(--brand-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }

  .hero-badge {
    display: none;
  }

  .hero-stats-list {
    padding-left: 6.25rem;
    gap: 0.75rem 1.5rem;
    justify-content: unset;
    margin-bottom: 26px;
  }
  .hero-stat-item {
    font-size: 1.25rem;
  }

  .hero-stat-item .stat-icon {
    width: 1.125rem;
    height: 1.125rem;
  }

  .hero-stat-item strong {
    font-size: 1.25rem;
  }

  .hero-actions {
    gap: 1.25rem;
    width: 100%;
    padding: 0 8.75rem;
  }

  .hero-actions .btn {
    height: 4.25rem;
    font-size: 1.875rem;
  }

  .hero-actions .btn.apply {
    width: 15.8125rem;
    height: 4.25rem;
    border-radius: 0.75rem;
  }

  .hero-actions .btn.learn {
    width: 12.375rem;
    height: 4.25rem;
    border: 0.125rem solid;
    border-color: #1b72d0;
    border-radius: 0.75rem;
  }

  /* Stats bar — carousel */
  .stats-bar {
    margin-top: 2rem;
    position: static; /* 移除 position:relative，让 wrapper 成为定位上下文 */
  }

  .stats-carousel-wrapper {
    position: relative;
    margin: 0 auto;
    width: 42.875rem;
    height: 8.25rem;
    background: #ffffff;
    border-radius: 1.5rem;
    box-shadow: 0px 0.1875rem 0.375rem rgba(0, 0, 0, 0.16);
  }
  .stats-bar .container {
    width: 38.9375rem;
    height: 8.25rem;
    position: relative;
    padding: 1.5625rem 0px 1.875rem;
    gap: 0;
    flex-wrap: nowrap;
    justify-content: flex-start;
    overflow-x: auto;
    overflow-y: hidden;
    scrollbar-width: none;
    -ms-overflow-style: none;
    box-shadow: none;
  }
  .stats-bar .container::-webkit-scrollbar {
    display: none;
  }
  .stat-item {
    width: 13rem;
    box-sizing: border-box;
    gap: 0.875rem;
    min-width: unset;
  }
  /* 分隔线：全高、浅灰 */
  .stat-item:not(:last-child)::after {
    display: block;
    right: 0;
    top: 0.5rem;
    width: 0.0625rem;
    height: 3.75rem;
    background: #b5b5b5;
  }
  /* 数字：纯蓝色，移除渐变 */
  .stat-number {
    height: 2.3125rem;
    line-height: normal;
    font-family: Microsoft YaHei;
    font-weight: 700;
    color: #000000;
    font-size: 1.75rem;
    text-align: center;
  }
  .stat-label {
    height: 1.625rem;
    line-height: normal;
    font-family: Microsoft YaHei;
    color: #6b6b6b;
    font-size: 1.25rem;
    text-align: center;
  }
  /* 轮播箭头：实线方框 */
  .stats-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 1.875rem;
    height: 1.875rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #fff;
    font-weight: normal;
    cursor: pointer;
    z-index: 10;
    line-height: 1;
    user-select: none;
    transition:
            background 0.2s,
            border-color 0.2s;
  }
  .stats-arrow-left {
    left: 0.5rem;
    background: url('../../img/hxy/prev.png') no-repeat center center;
    background-size: 100%;
  }
  .stats-arrow-right {
    right: 0.5rem;
    background: url('../../img/hxy/next.png') no-repeat center center;
    background-size: 100%;
  }

  /* Section titles */
  .section-label {
    height: 2.25rem;
    border: 0.0625rem solid #d5d5d5;
    border-radius: 1.125rem;
    padding: 0.3125rem 0.9375rem;
    line-height: 1;
    font-size: 1.25rem;
    margin-bottom: 1rem;
  }

  .section-title {
    height: 2.9375rem;
    line-height: normal;
    font-weight: 700;
    color: #000000;
    font-size: 2.25rem;
    margin-bottom: 1rem;
  }

  .section-subtitle {
    height: 1.625rem;
    line-height: normal;
    color: #6b6b6b;
    font-size: 1.25rem;
  }

  /* Platforms */
  .platforms-grid {
    margin-bottom: 1.75rem;
  }

  .platforms {
    padding: 4.625rem 0 5.9375rem;
  }

  .platforms .section-header {
    margin-bottom: 2.625rem;
  }

  .platforms-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
  }

  .platform-item {
    width: 10.5rem;
    height: 3.5rem;
    background: #ffffff;
    border: 0.0625rem solid #e1e1e1;
    border-radius: 0.5rem;
    padding: 0;
    min-height: unset;
  }

  .platform-icon {
    width: 8.25rem;
    height: 2.5rem;
    background-size: 100%;
  }

  .platform-note {
    margin: 0;
    height: 1.625rem;
    line-height: normal;
    color: #6b6b6b;
    font-size: 1.25rem;
    text-align: center;
  }

  /* Features */
  .features {
    padding: 4.25rem 2rem 4.375rem;
  }
  .features .container {
    padding: 0;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }
  .feature-card {
    --notch-size: 5.3125rem;
    --icon-size: 4.375rem;
  }
  .feature-card__content {
    padding: 1.5rem 1.5rem 1.875rem;
  }
  .feature-card-name {
    height: 2.5rem;
    line-height: normal;
    font-weight: 700;
    font-size: 1.875rem;
    margin-bottom: 1.875rem;
  }

  .feature-sub-item {
    margin-bottom: 1.5rem;
  }

  .feature-sub-item .sub-title {
    height: 2.1875rem;
    line-height: normal;
    font-size: 1.625rem;
    margin-bottom: 1rem;
  }

  .feature-sub-item .sub-desc {
    width: 39.875rem;
    line-height: normal;
    font-size: 1.625rem;
    letter-spacing: 0.0625rem;
  }

  .feature-card__icon-face img {
    width: 2.375rem;
    height: 2.375rem;
  }

  /* Highlights */
  .highlights {
    padding: 5rem 2rem;
  }

  .highlights .container {
    padding: 0;
  }
  .highlight-row {
    padding: 1.5rem 0;
    gap: 0px;
  }
  .highlight-row:not(:first-child, :last-child) {
    padding: 1.5rem 0;
  }
  .highlight-visual {
    max-width: 100%;
  }
  .highlight-number {
    font-size: 2rem;
    margin-bottom: -1.75rem;
    opacity: 36%;
    width: 4rem;
    height: 4.125rem;
    line-height: normal;
    font-weight: 700;
    color: #98ccfc;
    font-size: 3.125rem;
  }
  .highlight-text {
    text-align: left;
    margin-top: 23px;
  }
  .highlight-text h3 {
    height: 2.5rem;
    line-height: normal;
    font-weight: 700;
    color: #000000;
    font-size: 1.875rem;
  }
  .highlight-text p {
    width: 42.8125rem;
    line-height: 2.5rem;
    color: #6b6b6b;
    font-size: 1.625rem;
    letter-spacing: 0.0625rem;
  }

  .highlight-row-erp {
    margin-top: -0.9375rem;
  }
  .highlight-row-api,
  .highlight-row-pda,
  .highlight-row-flexible {
    margin-top: 2.75rem;
  }

  .highlight-row-erp img {
    width: 40.5rem;
    height: 22.125rem;
  }

  .highlight-row-api img {
    width: 39.375rem;
    height: 23.625rem;
  }

  .highlight-row-pda img {
    width: 38.375rem;
    height: 27.3125rem;
  }

  .highlight-row-flexible img {
    width: 39.125rem;
    height: 23.5rem;
  }

  /* Why us */
  .why-us {
    padding: 3.25rem 0 3.8125rem;
    background: url('../../img/hxy/why_us_m_bg.png');
    background-size: 100% 100%;
  }

  .why-us .container {
    padding: 0 2rem;
  }

  .why-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.75rem 1.625rem;
    perspective: none;
  }
  .why-card {
    width: auto;
    height: auto;
    padding: 2.25rem 1.5rem 1.5rem;
    gap: 1.25rem;
    /* 移动端禁用 3D 翻转动画，立即显示 */
    opacity: 1 !important;
    transform: none !important;
    animation: none !important;
    backface-visibility: visible;
  }
  .why-card .why-card-icon,
  .why-card h4,
  .why-card p {
    opacity: 1 !important;
    transform: none !important;
    animation: none !important;
  }
  .why-card h4 {
    height: 2.3125rem;
    line-height: normal;
    font-weight: 700;
    color: #000000;
    font-size: 1.75rem;
  }
  .why-card p {
    width: 17.625rem;
    height: 13.8125rem;
    line-height: 2.375rem;
    color: #949494;
    font-size: 1.5rem;
    letter-spacing: 0.075rem;
  }
  .why-card-icon {
    width: 2.75rem;
    height: 2.75rem;
  }

  /* Partners — carousel */
  .partners {
    overflow-x: hidden; /* 防止轮播负边距导致页面横向溢出 */
    padding: 3.5rem 0;
  }
  .partners-grid {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    gap: 0.75rem;
    padding: 1rem 0;
    margin: 0 -1rem;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
  }
  .partners-grid::-webkit-scrollbar {
    display: none;
  }
  .partner-card {
    background: #ffffff;
    border-radius: 1rem;
    box-shadow: 0px 0.1875rem 0.75rem rgba(0, 0, 0, 0.1);
    flex: 0 0 65vw;
    scroll-snap-align: center;
    border-radius: 0.75rem;
    box-sizing: border-box;
    transition:
            transform 0.3s,
            filter 0.3s,
            opacity 0.3s;
  }

  .partner-card.active {
    width: 29.375rem;
    height: 56rem;
  }

  .partner-card:not(.active) {
    transform: scale(0.92);
    filter: blur(0.0625rem);
    opacity: 0.6;
  }

  .partner-card-header {
    gap: 0.75rem;
    margin-bottom: 1rem;
  }

  .partner-card-header .partner-card-logo {
    width: 4.125rem;
    height: 4.125rem;
    background: #ffffff;
    border: 0.0625rem solid #e2e2e2;
    margin-bottom: 1.5rem;
  }

  .partner-card-title {
    margin-left: 1.5rem;
    height: 2.5rem;
    line-height: normal;
    font-weight: 700;
    color: #000000;
    font-size: 1.875rem;
  }

  .partner-card-cover {
    height: 17.25rem;
    border-radius: 0.75rem 0.75rem 0 0;
  }
  .partner-card-body {
    padding: 2rem 1.5rem 1.5rem;
  }

  .partner-card-desc {
    width: 26.375rem;
    height: 25.6875rem;
    line-height: 2.375rem;
    color: #6d6d6d;
    font-size: 1.5rem;
  }

  .partner-card-link {
    height: 1.9375rem;
    line-height: 1.75rem;
    color: #1b73d1;
    font-size: 1.5rem;
  }
  /* 分页圆点 */
  .partners-dots {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 0 0;
  }
  .partners-dot {
    border-radius: 0.375rem;
    background: #d1d5db;
    border: none;
    padding: 0;
    cursor: pointer;
    width: 2.625rem;
    height: 0.75rem;
    background: #ebeef5;
    transition:
            background 0.2s,
            transform 0.2s;
  }
  .partners-dot.active {
    background: linear-gradient(90deg, #1b72d1 0%, #2aa49d 100%);
    transform: scale(1.2);
  }

  /* Process */
  .process .section-header .section-subtitle {
    margin: 0;
  }

  .process {
    width: 46.875rem;
    height: 37.25rem;
    padding: 3rem 2.9375rem;
    background-size: 100% 100%;
    box-sizing: border-box;

    .container {
      padding: 0;
    }
  }

  .process-steps {
    margin-bottom: 2.375rem;
    padding: 0;
  }

  .process .section-header {
    margin-bottom: 3rem;
  }

  .process-steps .process-step-num {
    width: 2.25rem;
    height: 2.25rem;
    margin-bottom: 1.4375rem;
    font-size: 1.125rem;
  }

  .process-steps h4 {
    width: 6rem;
    height: 1.9375rem;
    line-height: normal;
    font-weight: 700;
    color: #000000;
    font-size: 1.5rem;
  }

  .process-steps p {
    width: 11.25rem;
    height: 4.875rem;
    line-height: normal;
    color: #6b6b6b;
    font-size: 1.25rem;
    text-align: center;
  }

  .process-step-line::before {
    top: 1.125rem;
    left: -4.6875rem;
    width: 9.375rem;
  }

  .process-cta .btn {
    line-height: normal;
    color: #ffffff;
    font-size: 1.875rem;
    width: 24.125rem;
    height: 5.5rem;
    border-radius: 0.75rem;
    font-size: 2rem;
    font-weight: 400;
    padding: 0.9375rem 1.5rem;
    position: relative;
    overflow: hidden;
  }

  /* Footer */
  .footer {
    padding: 2.75rem 0 0;
  }

  .footer-brand .footer-logo {
    width: 10.0625rem;
    height: 3rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 0;
    padding-bottom: 0;
    border-bottom: none;
  }
  /* 重排顺序：links → brand → contact → bottom */
  .footer-links {
    display: block;
    order: 1;
    padding: 0;
    margin-bottom: 2.9375rem;
  }

  .footer-links #footerLinks a {
    color: #fff;
    font-size: 2rem;
    height: 6rem;
    border-bottom: 0.125rem solid #374b6b;
  }
  .footer-links a .footer-link-icon {
    display: none !important;
  }

  .footer-brand {
    order: 2;
    padding-bottom: 1.5rem;
  }
  .footer-contact {
    display: block;
    order: 3;
    padding-bottom: 0.75rem;
  }
  .footer-brand p {
    width: 42.75rem;
    height: 7.75rem;
    line-height: normal;
    color: #c2c2c2;
    font-size: 1.5rem;
    max-width: unset;
  }
  .footer-contact h4,
  .footer-links h4 {
    display: none;
  }
  .footer-contact-item {
    width: 42.75rem;
    line-height: 2.125rem;
    color: #c2c2c2;
    font-size: 1.5rem;
    margin-top: 0.75rem;
  }
  .footer-bottom {
    order: 4;
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
    padding: 1.25rem 0;
    font-size: 1.25rem;
    border-top: 2px solid rgba(255, 255, 255, 0.08);
  }

  /* Sidebar – 移动端只显示电话咨询和客服咨询按钮 */
  .sidebar {
    position: static;
    flex-direction: row;
    border-radius: 0;
    box-shadow: none;
    background: var(--white);
    padding: 0;
    gap: 0;
  }
  .sidebar-item {
    display: none;
  }
  .sidebar-mobile-btns {
    display: flex;
    width: 100%;
  }
  .sidebar-mobile-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 23.4375rem;
    height: 5.625rem;
    font-size: 1.875rem;
    border-radius: 0;
    cursor: pointer;
    position: relative;
    transition: opacity 0.2s;
  }
  .sidebar-mobile-btn:active {
    opacity: 0.8;
  }
  .sidebar-mobile-btn--phone {
    background: #f5f5f5;
    color: #6d6d6d;
  }
  .sidebar-mobile-btn--service {
    background: var(--btn-bg);
    color: var(--white);
  }
  /* tooltip: 显示在按钮上方 */
  .sidebar-mobile-btn .sidebar-tooltip {
    right: auto;
    left: 50%;
    top: auto;
    bottom: calc(100% + 8px);
    transform: translateX(-50%) translateY(0.25rem) scale(0.85);
  }
  .sidebar-mobile-btn:hover .sidebar-tooltip,
  .sidebar-mobile-btn:active .sidebar-tooltip {
    opacity: 1;
    transform: translateX(-50%) translateY(0) scale(1);
  }
  /* QR弹窗: 显示在按钮上方居中 */
  .sidebar-mobile-btn .sidebar-qr-popup {
    right: auto;
    left: 50%;
    top: auto;
    bottom: calc(100% + 0.5rem);
    transform: translateX(-50%) translateY(0.25rem) scale(0.9);
  }
  .sidebar-mobile-btn:hover .sidebar-qr-popup,
  .sidebar-mobile-btn:active .sidebar-qr-popup {
    opacity: 1;
    pointer-events: auto;
    transform: translateX(-55%) translateY(0) scale(1);
  }

  /* ≤480px 电话按钮直接拨号，隐藏 tooltip */

  .sidebar-mobile-btn--phone .sidebar-tooltip {
    display: none;
  }

  .nav-links.open {
    top: 6rem;
    font-size: 2rem;
    a {
      font-size: 2rem;
    }
  }
}

/* --- Small mobile (≤480px) --- */
@media (max-width: 0px) {
  .nav-logo {
    width: 100px;
    height: 36px;
  }

  .hero-stat-item .stat-icon {
    width: 16px;
    height: 16px;
  }

  .container {
    padding: 0 12px;
  }
  .hero {
    margin-top: 55px;
    height: 300px;
  }

  .hero-title {
    font-size: 28px;
  }
  .hero-badge {
    font-size: 12px;
    padding: 1px 10px 2px 16px;
  }

  .hero-stats-list {
    padding: 0 12px;
    flex-wrap: wrap;
    margin-bottom: 24px;
  }

  .hero-stat-item {
    font-size: 13px;
    gap: 3px;
  }
  .hero-stat-item strong {
    font-size: 14px;
  }
  .hero-actions {
    gap: 10px;
    width: 100%;
    padding: 0 12px;
  }
  .hero-actions .btn {
    padding: 10px 16px;
    font-size: 16px;
  }

  .btn-lg {
    padding: 10px 16px;
    font-size: 16px;
  }

  .btn-lg.apply {
    width: 175px;
    height: 46px;
  }
  .btn-lg.learn {
    width: 135px;
    height: 46px;
  }
  .hero-stat-item span {
    font-size: 14px;
  }
  /* Stats bar carousel */
  .stats-bar .container {
    padding: 20px 0px;
  }
  .stat-item {
    min-width: 72px;
    padding: 0 10px;
  }
  .stat-number {
    font-size: 18px;
  }
  .stat-label {
    font-size: 10px;
  }
  .stats-arrow-left {
    left: 0px;
  }
  .stats-arrow-right {
    right: -3px;
  }

  /* Section */
  .section-title {
    font-size: 22px;
    margin-bottom: 10px;
  }
  .platform-note {
    font-size: 12px;
  }

  .features,
  .highlights,
  .why-us,
  .partners,
  .platforms {
    padding: 36px 0;
  }
  .section-header {
    margin-bottom: 24px;
  }

  .section-label {
    font-size: 14px;
    margin-bottom: 10px;
  }

  .section-subtitle {
    font-size: 14px;
  }

  /* Features */
  .feature-card {
    --notch-size: 48px;
    --icon-size: 38px;
  }
  .feature-card__icon-face {
    font-size: 18px;
  }
  .feature-card__icon-face img {
    width: 24px;
    height: 24px;
  }

  /* Platforms */
  .platforms-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
  }
  .platform-item {
    padding: 8px 4px;
    min-height: 40px;
    border-radius: 6px;
  }

  /* Highlights */
  .highlight-number {
    font-size: 28px;
  }
  .highlight-text h3 {
    font-size: 18px;
  }
  .highlight-text p {
    font-size: 13px;
  }

  .process-step p {
    font-size: 13px;
  }

  /* Sidebar */
  .sidebar {
    right: 8px;
    bottom: 50px;
    border-radius: 8px;
  }
  .sidebar-item {
    width: 36px;
    height: 36px;
  }
  .sidebar-item img.sidebar-icon {
    width: 14px;
    height: 14px;
  }

  .footer {
    padding-bottom: 0;
  }

  .footer-logo {
    width: 100px;
    height: 36px;
  }

  .footer-brand {
    padding-bottom: 16px;
  }
}

/* ========== Animations ========== */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition:
          opacity 0.6s ease,
          transform 0.6s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}