:root {
  --primary: #5b5bf0;
  --primary-dark: #4a48d8;
  --primary-light: #eef0ff;
  --accent: #ff7a45;
  --grad-1: #5a6cf0;
  --grad-2: #8f5df5;
  --grad-3: #b04cf5;
  --dark: #1a1d29;
  --dark-2: #242838;
  --text: #2d3142;
  --text-light: #6b7089;
  --white: #ffffff;
  --border: #e5e8f0;
  --success: #22c55e;
  --danger: #ef4444;
  --radius: 14px;
  --shadow: 0 6px 24px rgba(26, 29, 41, 0.08);
  --shadow-lg: 0 12px 40px rgba(26, 29, 41, 0.14);
  --container: 1160px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 76px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

ul {
  list-style: none;
}

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

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ============ Header / Nav ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

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

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 19px;
  font-weight: 800;
  color: var(--dark);
  white-space: nowrap;
}

.brand-logo {
  height: 42px;
  width: auto;
  display: block;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-menu a {
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-light);
  transition: color 0.2s, background 0.2s;
}

.nav-menu a:hover {
  color: var(--primary);
  background: var(--primary-light);
}

.nav-menu a.active {
  color: var(--primary);
  background: var(--primary-light);
  font-weight: 600;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--dark);
  border-radius: 2px;
  transition: transform 0.25s, opacity 0.25s;
}

.nav-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ============ Buttons ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.2s, background 0.2s;
}

.btn-primary {
  background: linear-gradient(120deg, var(--grad-1), var(--grad-2), var(--grad-3));
  color: #fff;
}

.btn-primary:hover {
  background: linear-gradient(120deg, var(--primary-dark), var(--grad-2), var(--grad-3));
  box-shadow: 0 8px 20px rgba(91, 91, 240, 0.35);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}

.btn-ghost:hover {
  background: var(--primary-light);
}

.btn-lg {
  padding: 15px 34px;
  font-size: 16px;
}

/* ============ Hero ============ */
.hero {
  position: relative;
  background: linear-gradient(155deg, #eef1ff 0%, #f6f1ff 40%, #fff4f6 75%, #ffffff 100%);
  padding: 92px 0 84px;
  overflow: hidden;
}

.hero-decor {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.5;
  pointer-events: none;
}

.hero-decor-a {
  width: 480px;
  height: 480px;
  top: -160px;
  right: -120px;
  background: radial-gradient(circle, rgba(155, 92, 245, 0.32), transparent 65%);
  animation: float-decor 9s ease-in-out infinite;
}

.hero-decor-b {
  width: 420px;
  height: 420px;
  bottom: -160px;
  left: -120px;
  background: radial-gradient(circle, rgba(46, 155, 240, 0.28), transparent 65%);
  animation: float-decor 11s ease-in-out infinite reverse;
}

.hero-decor-c {
  width: 360px;
  height: 360px;
  top: 20%;
  left: 38%;
  background: radial-gradient(circle, rgba(255, 122, 69, 0.18), transparent 65%);
  animation: float-decor 13s ease-in-out infinite;
}

.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(91, 91, 240, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(91, 91, 240, 0.05) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, #000 20%, transparent 75%);
  mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, #000 20%, transparent 75%);
  pointer-events: none;
}

.hero-decor {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.5;
  pointer-events: none;
}

.hero-decor-a {
  width: 480px;
  height: 480px;
  top: -160px;
  right: -120px;
  background: radial-gradient(circle, rgba(155, 92, 245, 0.35), transparent 65%);
  animation: float-decor 9s ease-in-out infinite;
}

.hero-decor-b {
  width: 420px;
  height: 420px;
  bottom: -160px;
  left: -120px;
  background: radial-gradient(circle, rgba(91, 91, 240, 0.3), transparent 65%);
  animation: float-decor 11s ease-in-out infinite reverse;
}

@keyframes float-decor {
  0%, 100% {
    transform: translateY(0) scale(1);
  }
  50% {
    transform: translateY(-28px) scale(1.06);
  }
}

.hero .container {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: 48px;
  position: relative;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 15px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(91, 91, 240, 0.18);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 22px;
  box-shadow: 0 4px 14px rgba(91, 91, 240, 0.1);
}

.hero-badge .hb-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, #22c55e, #4ade80);
  box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.18);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% {
    box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.18);
  }
  50% {
    box-shadow: 0 0 0 7px rgba(34, 197, 94, 0.05);
  }
}

.hero h1 {
  font-size: 48px;
  line-height: 1.18;
  color: var(--dark);
  letter-spacing: -0.5px;
  margin-bottom: 18px;
}

.hero h1 .gradient {
  background: linear-gradient(90deg, var(--grad-1), var(--grad-2), var(--grad-3));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero p.lead {
  font-size: 17.5px;
  color: var(--text-light);
  margin-bottom: 34px;
  max-width: 540px;
}

.hero-cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-cta .btn-primary {
  box-shadow: 0 10px 26px rgba(91, 91, 240, 0.35);
}

.hero-cta .btn-primary:hover {
  box-shadow: 0 14px 32px rgba(91, 91, 240, 0.45);
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 30px;
  margin-top: 46px;
}

.hero-stats .stat strong {
  display: block;
  font-size: 30px;
  letter-spacing: -0.5px;
  background: linear-gradient(90deg, var(--grad-1), var(--grad-2), var(--grad-3));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-stats .stat span {
  font-size: 14px;
  color: var(--text-light);
}

.hero-stats .stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

.hero-visual {
  position: relative;
}

.hero-frame {
  border-radius: 18px;
  box-shadow: 0 30px 80px rgba(26, 29, 41, 0.22);
  border: 1px solid rgba(255, 255, 255, 0.6);
  overflow: hidden;
  transform: perspective(1200px) rotateY(-4deg) rotateX(1deg);
  transition: transform 0.4s ease;
  background: var(--white);
}

.hero-visual:hover .hero-frame {
  transform: perspective(1200px) rotateY(-1deg) rotateX(0.5deg);
}

.hero-frame-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 12px 16px;
  background: linear-gradient(120deg, #1a1d29, #2a2f45);
}

.hero-frame-bar i {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: #ff5f57;
}

.hero-frame-bar i:nth-child(2) {
  background: #febc2e;
}
.hero-frame-bar i:nth-child(3) {
  background: #28c840;
}

.hero-frame-bar span {
  margin-left: 8px;
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.65);
  letter-spacing: 0.5px;
}

.hero-screenshot {
  overflow: hidden;
  max-height: 480px;
}

.hero-screenshot img {
  width: 100%;
  height: 480px;
  object-fit: cover;
  object-position: top;
}

.hero-chip {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 18px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 14px 34px rgba(26, 29, 41, 0.16);
  animation: chip-float 4.5s ease-in-out infinite;
}

.hero-chip .hc-icon {
  width: 40px;
  height: 40px;
  border-radius: 11px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--grad-1), var(--grad-2));
  color: #fff;
  flex-shrink: 0;
}

.hero-chip .hc-icon svg {
  width: 20px;
  height: 20px;
}

.hero-chip .hc-text strong {
  display: block;
  font-size: 14px;
  color: var(--dark);
}

.hero-chip .hc-text small {
  font-size: 12px;
  color: var(--text-light);
}

.chip-1 {
  top: 12%;
  left: -36px;
}

.chip-2 {
  bottom: 20%;
  right: -26px;
  animation-delay: 1.2s;
}

.chip-3 {
  top: -24px;
  right: 30px;
  animation-delay: 2.2s;
}

@keyframes chip-float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-12px);
  }
}

/* ============ Section base ============ */
.section {
  padding: 96px 0;
}

.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 54px;
}

.section-head .kicker {
  display: inline-block;
  color: var(--primary);
  font-weight: 700;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 2px;
  padding: 6px 16px;
  border-radius: 999px;
  background: var(--primary-light);
  border: 1px solid rgba(91, 91, 240, 0.16);
}

.section-head h2 {
  font-size: 36px;
  color: var(--dark);
  margin: 16px 0 14px;
  letter-spacing: -0.5px;
}

.section-head p {
  color: var(--text-light);
  font-size: 16px;
}

.section-alt {
  background: #f7f8fc;
}

/* ============ Feature cards ============ */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 13px;
  display: grid;
  place-items: center;
  background: var(--primary-light);
  color: var(--primary);
  margin-bottom: 18px;
}

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

.feature-card h3 {
  font-size: 18px;
  color: var(--dark);
  margin-bottom: 10px;
}

.feature-card p {
  color: var(--text-light);
  font-size: 14.5px;
}

/* ============ Showcase / how ============ */
.showcase {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 56px;
}

.showcase.reversed {
  direction: rtl;
}
.showcase.reversed > * {
  direction: ltr;
}

.showcase-text h3 {
  font-size: 26px;
  color: var(--dark);
  margin-bottom: 14px;
}

.showcase-text p {
  color: var(--text-light);
  margin-bottom: 18px;
}

.showcase-text .check-list li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  color: var(--text);
  margin-bottom: 10px;
  font-size: 15px;
}

.showcase-text .check-list svg {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  color: var(--success);
  margin-top: 3px;
}

.showcase-visual {
  border-radius: var(--radius);
  background: linear-gradient(135deg, #e9edff, #f7f4ff);
  height: 320px;
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  color: var(--primary);
  font-size: 40px;
  font-weight: 800;
  letter-spacing: 2px;
}

.showcase-visual img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  border-radius: var(--radius);
}

/* ============ CTA band ============ */

/* ============ Download page ============ */
.page-hero {
  background: linear-gradient(160deg, #f0f2ff, #ffffff);
  padding: 64px 0 56px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}

.page-hero h1 {
  font-size: 38px;
  color: var(--dark);
  margin-bottom: 12px;
}

.page-hero p {
  color: var(--text-light);
  font-size: 17px;
  max-width: 560px;
  margin: 0 auto;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin-top: 48px;
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
}

.download-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  text-align: center;
  background: var(--white);
  transition: transform 0.2s, box-shadow 0.2s;
  display: flex;
  flex-direction: column;
}

.download-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.download-card .os-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  background: var(--primary-light);
  color: var(--primary);
}

.download-card .os-icon svg {
  width: 32px;
  height: 32px;
}

.download-card h3 {
  font-size: 20px;
  color: var(--dark);
  margin-bottom: 6px;
}

.download-card .version {
  color: var(--text-light);
  font-size: 14px;
  margin-bottom: 20px;
}

.download-card .meta {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 8px;
}

.download-card .count {
  font-size: 13px;
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 22px;
}

.download-card .btn {
  margin-top: auto;
  width: 100%;
}

.download-card .btn.disabled {
  background: #e9ecf3;
  color: #9aa1b4;
  cursor: not-allowed;
  box-shadow: none;
}

.download-note {
  text-align: center;
  color: var(--text-light);
  font-size: 14px;
  margin-top: 32px;
}

.sys-req {
  margin-top: 64px;
}

.sys-req h3 {
  text-align: center;
  font-size: 24px;
  color: var(--dark);
  margin-bottom: 28px;
}

.sys-req-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.sys-req-item {
  background: #f7f8fc;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  text-align: center;
}

.sys-req-item strong {
  display: block;
  color: var(--dark);
  font-size: 15px;
  margin-bottom: 6px;
}

.sys-req-item span {
  color: var(--text-light);
  font-size: 13.5px;
}

/* ============ Tutorial page ============ */
.full-course-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 44px;
  padding: 28px 32px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(135deg, #f6f7ff 0%, #fff 58%, #f4f0ff 100%);
  box-shadow: var(--shadow);
}

.full-course-info h3 {
  font-size: 22px;
  color: var(--dark);
  margin: 8px 0 6px;
}

.full-course-info p {
  color: var(--text-light);
  font-size: 14.5px;
  max-width: 620px;
}

.full-course-tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--primary);
  color: var(--white);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.full-course-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  flex-shrink: 0;
}

.tutorial-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 28px;
  margin-top: 28px;
  align-items: start;
}

.tutorial-list {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--white);
  overflow: hidden;
  position: sticky;
  top: 88px;
}

.tutorial-list h4 {
  padding: 18px 20px;
  font-size: 16px;
  color: var(--dark);
  border-bottom: 1px solid var(--border);
  background: #fafbff;
}

.tutorial-group {
  border-bottom: 1px solid var(--border);
}

.tutorial-group:last-child {
  border-bottom: none;
}

.tutorial-group-head {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 14px 20px;
  background: none;
  border: none;
  cursor: pointer;
  font: inherit;
  text-align: left;
  transition: background 0.2s;
}

.tutorial-group-head:hover {
  background: #f7f8fc;
}

.tutorial-group-head .tg-icon {
  font-size: 16px;
}

.tutorial-group-head .tg-name {
  flex: 1;
  font-weight: 600;
  font-size: 14.5px;
  color: var(--dark);
}

.tutorial-group-head .tg-count {
  font-size: 12px;
  color: var(--text-light);
  background: #eef0f7;
  border-radius: 20px;
  padding: 2px 9px;
  line-height: 1.5;
}

.tutorial-group-head .tg-arrow {
  width: 15px;
  height: 15px;
  color: var(--text-light);
  transition: transform 0.25s;
}

.tutorial-group.open .tutorial-group-head .tg-arrow {
  transform: rotate(180deg);
}

.tutorial-group-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s;
}

.tutorial-group.open .tutorial-group-body {
  max-height: 520px;
  overflow-y: auto;
}

.tutorial-item {
  padding: 12px 20px 12px 26px;
  cursor: pointer;
  border-top: 1px dashed var(--border);
  transition: background 0.2s;
}

.tutorial-item:first-child {
  border-top: none;
}

.tutorial-item:hover {
  background: #f7f8fc;
}

.tutorial-item.active {
  background: var(--primary-light);
  border-left: 3px solid var(--primary);
}

.tutorial-item .t-title {
  font-weight: 600;
  font-size: 14px;
  color: var(--dark);
  margin-bottom: 3px;
}

.tutorial-item .t-desc {
  font-size: 12.5px;
  color: var(--text-light);
  line-height: 1.55;
}

.tutorial-player {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--white);
}

.tutorial-player video {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #000;
  border-radius: var(--radius) var(--radius) 0 0;
}

.player-error {
  display: none;
  text-align: center;
  padding: 60px 24px;
  color: var(--danger);
  font-size: 16px;
  background: #fdf2f2;
}

.player-error.show {
  display: block;
}

.tutorial-meta {
  padding: 22px 26px;
}

.tutorial-meta h2 {
  font-size: 21px;
  color: var(--dark);
  margin-bottom: 8px;
}

.tutorial-meta p {
  color: var(--text-light);
  font-size: 14.5px;
}

/* ============ 联系我们页 ============ */
.contact-tip {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  max-width: 640px;
  margin: 0 auto 40px;
  padding: 14px 22px;
  border-radius: 999px;
  background: var(--primary-light);
  border: 1px solid rgba(91, 91, 240, 0.16);
  color: var(--primary);
  font-size: 15px;
  font-weight: 600;
}

.contact-tip svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  max-width: 1080px;
  margin: 0 auto;
}

.contact-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 28px 22px 26px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: 0 8px 26px rgba(26, 29, 41, 0.06);
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
}

.contact-card:hover {
  transform: translateY(-5px);
  border-color: rgba(91, 91, 240, 0.25);
  box-shadow: var(--shadow-lg);
}

.contact-card .cc-qr {
  flex-shrink: 0;
  margin-bottom: 16px;
}

.contact-card .cc-qr img {
  width: 104px;
  height: 104px;
  border-radius: 12px;
  border: 1px solid var(--border);
  display: block;
}

.contact-card .cc-info {
  flex: 1;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.contact-card .cc-info h3 {
  font-size: 17px;
  color: var(--dark);
  margin-bottom: 4px;
}

.contact-card .cc-role {
  color: var(--primary);
  font-size: 12.5px;
  font-weight: 600;
  margin-bottom: 12px;
}

.contact-card .cc-biz {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: #8f5df5;
  background: linear-gradient(135deg, #f3ecff, #fbf3ff);
  border: 1px solid rgba(143, 93, 245, 0.25);
  border-radius: 999px;
  padding: 4px 12px;
  margin-bottom: 12px;
}

.contact-card .cc-wechat {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: #f7f8fc;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 12px;
  width: 100%;
  margin-bottom: 14px;
}

.contact-card .cw-label {
  font-size: 12px;
  color: var(--text-light);
  flex-shrink: 0;
}

.contact-card .cw-value {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--dark);
  font-family: "SF Mono", Consolas, Menlo, monospace;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.contact-card .cc-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 7px;
  margin-bottom: 14px;
}

.contact-card .cc-tags span {
  background: #f4f5fb;
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 12px;
  padding: 4px 11px;
  border-radius: 999px;
}

.contact-card .btn {
  margin-top: auto;
  width: 100%;
  padding: 10px 16px;
  font-size: 14px;
}

.contact-ways {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.contact-way-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 34px 28px;
  text-align: center;
  transition: transform 0.25s, box-shadow 0.25s;
}

.contact-way-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.contact-way-card .cw-icon {
  width: 58px;
  height: 58px;
  margin: 0 auto 18px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--grad-1), var(--grad-2), var(--grad-3));
  color: #fff;
  box-shadow: 0 10px 22px rgba(91, 91, 240, 0.3);
}

.contact-way-card .cw-icon svg {
  width: 28px;
  height: 28px;
}

.contact-way-card h3 {
  font-size: 18px;
  color: var(--dark);
  margin-bottom: 8px;
}

.contact-way-card p {
  color: var(--text-light);
  font-size: 14px;
  margin-bottom: 16px;
}

.contact-way-card a {
  color: var(--primary);
  font-size: 14px;
  font-weight: 600;
  word-break: break-all;
}

.contact-way-card a:hover {
  text-decoration: underline;
}

@media (max-width: 1024px) {
  .contact-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .contact-ways {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 480px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

/* ============ 悬浮联系我们 ============ */
.float-contact-btn {
  position: fixed;
  right: 28px;
  bottom: 40px;
  z-index: 300;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 0 22px;
  height: 54px;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  background: linear-gradient(135deg, var(--grad-1), var(--grad-2), var(--grad-3));
  color: #fff;
  box-shadow: 0 12px 32px rgba(91, 91, 240, 0.45);
  transition: transform 0.25s, box-shadow 0.25s;
}

.float-contact-btn:hover {
  transform: translateY(-4px) scale(1.04);
  box-shadow: 0 18px 40px rgba(91, 91, 240, 0.55);
}

.float-contact-btn.hidden {
  transform: scale(0);
  opacity: 0;
  pointer-events: none;
}

.float-contact-btn .fc-icon {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.22);
  flex-shrink: 0;
}

.float-contact-btn .fc-icon svg {
  width: 16px;
  height: 16px;
}

.float-contact-btn .fc-label {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.float-contact-btn::before {
  content: "";
  position: absolute;
  inset: -6px;
  border-radius: 999px;
  border: 2px solid rgba(91, 91, 240, 0.4);
  animation: contact-ring 2.2s ease-out infinite;
}

@keyframes contact-ring {
  0% {
    transform: scale(0.85);
    opacity: 0.9;
  }
  100% {
    transform: scale(1.5);
    opacity: 0;
  }
}

@media (max-width: 480px) {
  .float-contact-btn {
    right: 18px;
    bottom: 26px;
    height: 50px;
    padding: 0 18px;
  }
}

/* ============ Footer ============ */
.site-footer {
  background: var(--dark);
  color: #aab0c4;
  padding: 56px 0 32px;
  margin-top: 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand .brand {
  color: #fff;
  margin-bottom: 14px;
}

.footer-brand .brand-logo {
  height: 44px;
  padding: 6px 10px;
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
}

.footer-brand p {
  font-size: 14px;
  max-width: 300px;
}

.footer-qr {
  display: flex;
  gap: 20px;
  margin-top: 22px;
}

.footer-qr .qr-item {
  text-align: center;
}

.footer-qr .qr-item img {
  width: 96px;
  height: 96px;
  background: #fff;
  border-radius: 10px;
  padding: 6px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
  display: block;
}

.footer-qr .qr-item span {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  color: #aab0c4;
}

.footer-col h5 {
  color: #fff;
  font-size: 15px;
  margin-bottom: 16px;
}

.footer-col li {
  margin-bottom: 10px;
}

.footer-col a {
  font-size: 14px;
  color: #aab0c4;
  transition: color 0.2s;
}

.footer-col a:hover {
  color: #fff;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  font-size: 13px;
  text-align: center;
}

/* ============ Value band (首页价值数据) ============ */
/* ============ 价值带 ============ */
.value-band {
  background: linear-gradient(160deg, #f6f4ff 0%, #ffffff 45%, #f3f6ff 100%);
  color: var(--text);
  padding: 96px 0;
  position: relative;
  overflow: hidden;
}

.value-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(560px 300px at 12% 10%, rgba(91, 91, 240, 0.1), transparent 60%),
    radial-gradient(560px 300px at 88% 90%, rgba(155, 92, 245, 0.1), transparent 60%);
  pointer-events: none;
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  position: relative;
}

.value-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 38px 34px;
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
  position: relative;
  overflow: hidden;
  box-shadow: 0 8px 26px rgba(26, 29, 41, 0.06);
}

.value-item::after {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 56px;
  height: 3px;
  border-radius: 0 0 4px 4px;
  background: linear-gradient(90deg, var(--grad-1), var(--grad-2));
  opacity: 0.7;
}

.value-item:hover {
  transform: translateY(-6px);
  border-color: rgba(91, 91, 240, 0.25);
  box-shadow: var(--shadow-lg);
}

.value-item .v-icon {
  width: 54px;
  height: 54px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--grad-1), var(--grad-2));
  margin-bottom: 20px;
  box-shadow: 0 10px 26px rgba(91, 91, 240, 0.3);
}

.value-item:nth-child(2) .v-icon {
  background: linear-gradient(135deg, #ff7a45, #f04c8f);
  box-shadow: 0 10px 26px rgba(255, 122, 69, 0.28);
}

.value-item:nth-child(3) .v-icon {
  background: linear-gradient(135deg, #2e9bf0, #1fb562);
  box-shadow: 0 10px 26px rgba(46, 155, 240, 0.28);
}

.value-item .v-icon svg {
  width: 26px;
  height: 26px;
  color: #fff;
}

.value-item h3 {
  font-size: 21px;
  margin-bottom: 10px;
  letter-spacing: 1px;
  color: var(--dark);
}

.value-item p {
  color: var(--text-light);
  font-size: 14.5px;
}

/* ============ 公式横幅 ============ */
.formula-band {
  text-align: center;
  padding: 92px 0 0;
  position: relative;
}

.formula {
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.formula .f-item {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: linear-gradient(150deg, #ffffff, #f6f5ff);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 22px 34px;
  min-width: 178px;
  font-size: 22px;
  font-weight: 800;
  color: var(--dark);
  letter-spacing: 1px;
  box-shadow: 0 8px 26px rgba(26, 29, 41, 0.06);
  transition: transform 0.25s, box-shadow 0.25s;
}

.formula .f-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow);
}

.formula .f-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 44px;
  height: 3px;
  border-radius: 0 0 4px 4px;
  background: linear-gradient(90deg, var(--grad-1), var(--grad-2));
}

.formula .f-item small {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-light);
  margin-bottom: 8px;
  letter-spacing: 0;
}

.formula .f-op {
  display: grid;
  place-items: center;
  align-self: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 20px;
  font-weight: 800;
  flex-shrink: 0;
}

.formula .f-plus {
  color: var(--primary);
}

.formula .f-eq {
  color: var(--accent);
  background: #fff1ea;
}

.formula .f-result {
  background: linear-gradient(120deg, var(--grad-1), var(--grad-2), var(--grad-3));
  color: #fff;
  border: none;
  box-shadow: 0 18px 44px rgba(91, 91, 240, 0.42);
  position: relative;
  overflow: hidden;
}

.formula .f-result::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(240px 120px at 50% -20%, rgba(255, 255, 255, 0.35), transparent 70%);
  pointer-events: none;
}

.formula .f-result small {
  color: rgba(255, 255, 255, 0.85);
}

.formula .f-result::before {
  display: none;
}

.formula-desc {
  color: var(--text-light);
  font-size: 16px;
  margin-top: 26px;
}

/* ============ 五大场景 ============ */
.scenario-section {
  padding: 96px 0;
  background: linear-gradient(160deg, #f6f7fc, #ffffff 40%, #f4f0ff 100%);
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
}

.scenario-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 22px;
  text-align: center;
  transition: transform 0.25s, box-shadow 0.25s;
  position: relative;
  overflow: hidden;
}

.scenario-card::before {
  content: "";
  position: absolute;
  top: -40px;
  right: -40px;
  width: 110px;
  height: 110px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(91, 91, 240, 0.1), transparent 70%);
  pointer-events: none;
}

.scenario-card::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 46px;
  height: 3px;
  border-radius: 4px 4px 0 0;
  background: linear-gradient(90deg, var(--grad-1), var(--grad-2));
  opacity: 0;
  transition: opacity 0.25s, width 0.25s;
}

.scenario-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(91, 91, 240, 0.25);
}

.scenario-card:hover::after {
  opacity: 1;
  width: 70px;
}

.scenario-card .s-icon {
  width: 58px;
  height: 58px;
  margin: 0 auto 18px;
  border-radius: 17px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--primary-light), #f0ecff);
  color: var(--primary);
  position: relative;
  transition: transform 0.25s, background 0.25s, color 0.25s;
}

.scenario-card:nth-child(2) .s-icon {
  background: linear-gradient(135deg, #e8f6ff, #e4f3ff);
  color: #2e9bf0;
}

.scenario-card:nth-child(3) .s-icon {
  background: linear-gradient(135deg, #fff3e8, #fff7ee);
  color: #ff7a45;
}

.scenario-card:nth-child(4) .s-icon {
  background: linear-gradient(135deg, #e9faf0, #eefbf4);
  color: #1fb562;
}

.scenario-card:nth-child(5) .s-icon {
  background: linear-gradient(135deg, #f8ecff, #fbf3ff);
  color: #a855f7;
}

.scenario-card:nth-child(2):hover .s-icon {
  background: linear-gradient(135deg, #2e9bf0, #5a6cf0);
}

.scenario-card:nth-child(3):hover .s-icon {
  background: linear-gradient(135deg, #ff7a45, #f04c8f);
}

.scenario-card:nth-child(4):hover .s-icon {
  background: linear-gradient(135deg, #1fb562, #2e9bf0);
}

.scenario-card:nth-child(5):hover .s-icon {
  background: linear-gradient(135deg, #a855f7, #f04c8f);
}

.scenario-card:nth-child(2):hover .s-icon {
  box-shadow: 0 10px 22px rgba(46, 155, 240, 0.35);
}

.scenario-card:nth-child(3):hover .s-icon {
  box-shadow: 0 10px 22px rgba(255, 122, 69, 0.35);
}

.scenario-card:nth-child(4):hover .s-icon {
  box-shadow: 0 10px 22px rgba(31, 181, 98, 0.35);
}

.scenario-card:nth-child(5):hover .s-icon {
  box-shadow: 0 10px 22px rgba(168, 85, 247, 0.35);
}

.scenario-card .s-icon svg {
  width: 27px;
  height: 27px;
}

.scenario-card h3 {
  font-size: 16.5px;
  color: var(--dark);
  margin-bottom: 8px;
}

.scenario-card p {
  font-size: 13.5px;
  color: var(--text-light);
}

/* ============ 能力大模块 (首页) ============ */
.module-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.module-card {
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 34px 32px;
  background: var(--white);
  display: flex;
  gap: 22px;
  align-items: flex-start;
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
  position: relative;
  overflow: hidden;
}

.module-card::before {
  content: "";
  position: absolute;
  top: -70px;
  right: -70px;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(91, 91, 240, 0.1), transparent 70%);
  pointer-events: none;
  transition: transform 0.4s;
}

.module-card:nth-child(2)::before {
  background: radial-gradient(circle, rgba(255, 122, 69, 0.1), transparent 70%);
}

.module-card:nth-child(3)::before {
  background: radial-gradient(circle, rgba(46, 155, 240, 0.1), transparent 70%);
}

.module-card:nth-child(4)::before {
  background: radial-gradient(circle, rgba(31, 181, 98, 0.1), transparent 70%);
}

.module-card:nth-child(5)::before {
  background: radial-gradient(circle, rgba(168, 85, 247, 0.1), transparent 70%);
}

.module-card:nth-child(6)::before {
  background: radial-gradient(circle, rgba(240, 76, 143, 0.1), transparent 70%);
}

.module-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(91, 91, 240, 0.25);
}

.module-card:hover::before {
  transform: scale(1.3);
}

.module-card .m-icon {
  flex-shrink: 0;
  width: 58px;
  height: 58px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--primary-light), #f0ecff);
  color: var(--primary);
  transition: background 0.25s, color 0.25s, box-shadow 0.25s, transform 0.25s;
}

.module-card:nth-child(2) .m-icon {
  background: linear-gradient(135deg, #fff3e8, #fff7ee);
  color: #ff7a45;
}

.module-card:nth-child(3) .m-icon {
  background: linear-gradient(135deg, #e8f6ff, #e4f3ff);
  color: #2e9bf0;
}

.module-card:nth-child(4) .m-icon {
  background: linear-gradient(135deg, #e9faf0, #eefbf4);
  color: #1fb562;
}

.module-card:nth-child(5) .m-icon {
  background: linear-gradient(135deg, #f8ecff, #fbf3ff);
  color: #a855f7;
}

.module-card:nth-child(6) .m-icon {
  background: linear-gradient(135deg, #fff0f5, #fff5f9);
  color: #f04c8f;
}

.module-card:hover .m-icon {
  background: linear-gradient(135deg, var(--grad-1), var(--grad-2));
  color: #fff;
  transform: translateY(-2px) scale(1.04);
  box-shadow: 0 10px 22px rgba(91, 91, 240, 0.35);
}

.module-card:nth-child(2):hover .m-icon {
  background: linear-gradient(135deg, #ff7a45, #f04c8f);
  box-shadow: 0 10px 22px rgba(255, 122, 69, 0.35);
}

.module-card:nth-child(3):hover .m-icon {
  background: linear-gradient(135deg, #2e9bf0, #5a6cf0);
  box-shadow: 0 10px 22px rgba(46, 155, 240, 0.35);
}

.module-card:nth-child(4):hover .m-icon {
  background: linear-gradient(135deg, #1fb562, #2e9bf0);
  box-shadow: 0 10px 22px rgba(31, 181, 98, 0.35);
}

.module-card:nth-child(5):hover .m-icon {
  background: linear-gradient(135deg, #a855f7, #f04c8f);
  box-shadow: 0 10px 22px rgba(168, 85, 247, 0.35);
}

.module-card:nth-child(6):hover .m-icon {
  background: linear-gradient(135deg, #f04c8f, #ff7a45);
  box-shadow: 0 10px 22px rgba(240, 76, 143, 0.35);
}

.module-card .m-icon svg {
  width: 28px;
  height: 28px;
}

.module-card h3 {
  font-size: 18.5px;
  color: var(--dark);
  margin-bottom: 8px;
}

.module-card p {
  color: var(--text-light);
  font-size: 14.5px;
  margin-bottom: 14px;
}

.module-card .tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.module-card .tags span {
  background: #f4f5fb;
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 12.5px;
  padding: 4px 11px;
  border-radius: 999px;
  transition: border-color 0.2s, background 0.2s, color 0.2s;
}

.module-card:hover .tags span {
  border-color: rgba(91, 91, 240, 0.3);
  background: var(--primary-light);
  color: var(--primary);
}

/* ============ 协同枢纽 ============ */
.hub-section {
  padding: 96px 0;
  background: linear-gradient(160deg, #f6f4ff 0%, #ffffff 45%, #f3f6ff 100%);
  color: var(--text);
  position: relative;
  overflow: hidden;
}

.hub-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(700px 420px at 50% 0%, rgba(91, 91, 240, 0.08), transparent 65%);
  pointer-events: none;
}

.hub-section .section-head h2 {
  color: var(--dark);
}

.hub-section .section-head p {
  color: var(--text-light);
}

.hub-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
  position: relative;
}

.hub-flow {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.hub-node {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 26px 16px;
  text-align: center;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
  box-shadow: 0 8px 26px rgba(26, 29, 41, 0.06);
}

.hub-node:hover {
  transform: translateY(-5px);
  border-color: rgba(91, 91, 240, 0.25);
  box-shadow: var(--shadow-lg);
}

.hub-node .h-icon {
  width: 46px;
  height: 46px;
  margin: 0 auto 12px;
  border-radius: 13px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--grad-1), var(--grad-2));
  box-shadow: 0 8px 18px rgba(91, 91, 240, 0.3);
}

.hub-node:nth-child(2) .h-icon {
  background: linear-gradient(135deg, #ff7a45, #f04c8f);
  box-shadow: 0 8px 18px rgba(255, 122, 69, 0.3);
}

.hub-node:nth-child(3) .h-icon {
  background: linear-gradient(135deg, #2e9bf0, #5a6cf0);
  box-shadow: 0 8px 18px rgba(46, 155, 240, 0.3);
}

.hub-node:nth-child(4) .h-icon {
  background: linear-gradient(135deg, #1fb562, #2e9bf0);
  box-shadow: 0 8px 18px rgba(31, 181, 98, 0.3);
}

.hub-node .h-icon svg {
  width: 21px;
  height: 21px;
  color: #fff;
}

.hub-node h4 {
  font-size: 16px;
  margin-bottom: 4px;
  color: var(--dark);
}

.hub-node span {
  font-size: 12.5px;
  color: var(--text-light);
}

.hub-center {
  text-align: center;
  padding: 30px;
}

.hub-orb {
  width: 158px;
  height: 158px;
  margin: 0 auto 24px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--grad-1), var(--grad-2), var(--grad-3));
  box-shadow: 0 20px 60px rgba(91, 91, 240, 0.4);
  position: relative;
}

.hub-orb::before {
  content: "";
  position: absolute;
  inset: -14px;
  border-radius: 50%;
  border: 2px dashed rgba(91, 91, 240, 0.4);
  animation: spin 16s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.hub-orb svg {
  width: 56px;
  height: 56px;
  color: #fff;
}

.hub-center h3 {
  font-size: 26px;
  margin-bottom: 10px;
  color: var(--dark);
}

.hub-center p {
  color: var(--text-light);
  max-width: 360px;
  margin: 0 auto;
  font-size: 15px;
}

/* ============ 收束标语 ============ */
.closing-band {
  padding: 110px 0;
  text-align: center;
  background: linear-gradient(160deg, #ffffff, #f4f2ff);
  position: relative;
  overflow: hidden;
}

.closing-band::before {
  content: "";
  position: absolute;
  top: -120px;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 700px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(91, 91, 240, 0.08), transparent 65%);
  pointer-events: none;
}

.closing-band h2 {
  font-size: 44px;
  line-height: 1.3;
  color: var(--dark);
  letter-spacing: 1px;
  position: relative;
}

.closing-band h2 .gradient {
  background: linear-gradient(90deg, var(--grad-1), var(--grad-2), var(--grad-3));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.closing-band p {
  color: var(--text-light);
  font-size: 17px;
  margin-top: 18px;
  position: relative;
}

.closing-band .closing-tags {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 32px;
  position: relative;
}

.closing-band .closing-tags span {
  padding: 9px 24px;
  border-radius: 999px;
  background: linear-gradient(150deg, #ffffff, #f7f6ff);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  box-shadow: var(--shadow);
  transition: transform 0.2s, color 0.2s, border-color 0.2s, box-shadow 0.2s;
}

.closing-band .closing-tags span:nth-child(1) {
  color: #5a6cf0;
  border-color: rgba(90, 108, 240, 0.35);
}

.closing-band .closing-tags span:nth-child(2) {
  color: #1fb562;
  border-color: rgba(31, 181, 98, 0.35);
}

.closing-band .closing-tags span:nth-child(3) {
  color: #ff7a45;
  border-color: rgba(255, 122, 69, 0.35);
}

.closing-band .closing-tags span:nth-child(4) {
  color: #8f5df5;
  border-color: rgba(143, 93, 245, 0.35);
}

.closing-band .closing-tags span:nth-child(5) {
  color: #2e9bf0;
  border-color: rgba(46, 155, 240, 0.35);
}

.closing-band .closing-tags span:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(26, 29, 41, 0.14);
}

/* ============ CTA band ============ */
.cta-band {
  background: linear-gradient(120deg, var(--grad-1), var(--grad-2), var(--grad-3));
  border-radius: 24px;
  padding: 64px 48px;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
  box-shadow: 0 30px 80px rgba(91, 91, 240, 0.35);
}

.cta-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(420px 200px at 15% -20%, rgba(255, 255, 255, 0.3), transparent 60%),
    radial-gradient(420px 220px at 90% 120%, rgba(255, 255, 255, 0.2), transparent 60%);
  pointer-events: none;
}

.cta-band h2 {
  font-size: 34px;
  margin-bottom: 12px;
  position: relative;
}

.cta-band p {
  opacity: 0.92;
  margin-bottom: 30px;
  position: relative;
}

.cta-band .btn {
  background: #fff;
  color: var(--primary);
  position: relative;
  padding: 15px 40px;
  font-size: 16px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.18);
}

.cta-band .btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.24);
}

.cta-band .cta-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  position: relative;
}

.cta-band .btn-cta-ghost {
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.55);
  backdrop-filter: blur(6px);
}

.cta-band .btn-cta-ghost:hover {
  background: rgba(255, 255, 255, 0.24);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.2);
}

/* ============ 三步上手 ============ */
.steps-section {
  background: #fff;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.step-item {
  position: relative;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 38px 32px 34px;
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
  overflow: hidden;
}

.step-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(91, 91, 240, 0.25);
}

.step-num {
  position: absolute;
  top: 18px;
  right: 22px;
  font-size: 46px;
  font-weight: 800;
  line-height: 1;
  color: var(--primary-light);
  letter-spacing: -1px;
  transition: color 0.25s;
  -webkit-user-select: none;
  user-select: none;
}

.step-item:hover .step-num {
  color: rgba(91, 91, 240, 0.18);
}

.step-icon {
  width: 56px;
  height: 56px;
  border-radius: 15px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--primary-light), #f0ecff);
  color: var(--primary);
  margin-bottom: 20px;
  transition: background 0.25s, color 0.25s, box-shadow 0.25s;
}

.step-item:nth-child(2) .step-icon {
  background: linear-gradient(135deg, #e8f6ff, #e4f3ff);
  color: #2e9bf0;
}

.step-item:nth-child(3) .step-icon {
  background: linear-gradient(135deg, #e9faf0, #eefbf4);
  color: #1fb562;
}

.step-item:hover .step-icon {
  background: linear-gradient(135deg, var(--grad-1), var(--grad-2));
  color: #fff;
  box-shadow: 0 10px 22px rgba(91, 91, 240, 0.32);
}

.step-item:nth-child(2):hover .step-icon {
  background: linear-gradient(135deg, #2e9bf0, #5a6cf0);
  box-shadow: 0 10px 22px rgba(46, 155, 240, 0.32);
}

.step-item:nth-child(3):hover .step-icon {
  background: linear-gradient(135deg, #1fb562, #2e9bf0);
  box-shadow: 0 10px 22px rgba(31, 181, 98, 0.32);
}

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

.step-item h3 {
  font-size: 19px;
  color: var(--dark);
  margin-bottom: 8px;
}

.step-item p {
  color: var(--text-light);
  font-size: 14px;
}

/* ============ 统计数字滚动 ============ */
.count-num {
  display: inline-block;
  font-variant-numeric: tabular-nums;
}

/* ============ CTA section 间距 ============ */
.cta-section {
  padding: 20px 0 96px;
}

/* ============ 滚动入场动画 ============ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: opacity, transform;
}

.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .hero-chip,
  .hero-decor,
  .hub-orb::before {
    animation: none;
  }
}

/* ============ 功能介绍页增强 ============ */
.feature-hero-stats {
  display: flex;
  justify-content: center;
  gap: 56px;
  margin-top: 36px;
  flex-wrap: wrap;
}

.feature-hero-stats .stat strong {
  display: block;
  font-size: 30px;
  background: linear-gradient(90deg, var(--grad-1), var(--grad-2), var(--grad-3));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.feature-hero-stats .stat span {
  font-size: 14px;
  color: var(--text-light);
}

.fgroup {
  margin-bottom: 72px;
}

.fgroup:last-child {
  margin-bottom: 0;
}

.fgroup-head {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 30px;
  padding-bottom: 18px;
  border-bottom: 2px solid var(--border);
}

.fgroup-head .fg-icon {
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--grad-1), var(--grad-2));
  color: #fff;
  box-shadow: var(--shadow);
}

.fgroup-head .fg-icon svg {
  width: 28px;
  height: 28px;
}

.fgroup-head .fg-text h2 {
  font-size: 24px;
  color: var(--dark);
  letter-spacing: -0.3px;
}

.fgroup-head .fg-text p {
  color: var(--text-light);
  font-size: 14.5px;
  margin-top: 4px;
}

.sub-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.sub-card {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 26px 24px;
  background: var(--white);
  transition: transform 0.22s, box-shadow 0.22s;
  display: flex;
  flex-direction: column;
}

.sub-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
  background: linear-gradient(160deg, #ffffff, #f5f4ff);
}

.sub-card .sc-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.sub-card .sc-badge {
  flex-shrink: 0;
  width: 42px;
  height: 42px;
  border-radius: 11px;
  display: grid;
  place-items: center;
  background: var(--primary-light);
  color: var(--primary);
}

.sub-card .sc-badge svg {
  width: 22px;
  height: 22px;
}

.sub-card h3 {
  font-size: 17px;
  color: var(--dark);
}

.sub-card .sc-desc {
  color: var(--text-light);
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 14px;
  flex: 1;
}

.sub-card .sc-points {
  list-style: none;
  margin-bottom: 16px;
}

.sub-card .sc-points li {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  font-size: 13.5px;
  color: var(--text);
  margin-bottom: 8px;
  line-height: 1.6;
}

.sub-card .sc-points svg {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  color: var(--primary);
  margin-top: 3px;
}

.sub-card .sc-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.sub-card .sc-tags span {
  background: #f4f5fb;
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 12px;
  padding: 4px 11px;
  border-radius: 999px;
}

.fgroup .group-cta {
  margin-top: 26px;
  text-align: center;
}

.fgroup .group-cta .btn {
  font-size: 14px;
  padding: 10px 22px;
}

@media (max-width: 1024px) {
  .sub-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .sub-grid {
    grid-template-columns: 1fr;
  }

  .fgroup-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
}

/* ============ 使用手册 ============ */
.manual-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 36px;
  margin-top: 40px;
  align-items: start;
}

.manual-toc {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--white);
  overflow: hidden;
  position: sticky;
  top: 88px;
  max-height: calc(100vh - 110px);
  overflow-y: auto;
}

.manual-toc h4 {
  padding: 16px 18px;
  font-size: 15px;
  color: var(--dark);
  border-bottom: 1px solid var(--border);
  background: #fafbff;
}

.manual-toc nav a {
  display: block;
  padding: 10px 18px;
  font-size: 13.5px;
  color: var(--text-light);
  border-bottom: 1px solid #f2f3f8;
  transition: background 0.2s, color 0.2s;
}

.manual-toc nav a:hover {
  background: var(--primary-light);
  color: var(--primary);
}

.manual-toc nav a.active {
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
  border-left: 3px solid var(--primary);
}

.manual-content {
  min-width: 0;
}

.manual-sec {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--white);
  padding: 30px 30px 26px;
  margin-bottom: 24px;
  scroll-margin-top: 92px;
}

.manual-sec .msec-head {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 18px;
}

.manual-sec .msec-no {
  flex-shrink: 0;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--grad-1), var(--grad-2));
  color: #fff;
  font-weight: 700;
  font-size: 15px;
}

.manual-sec .msec-head h2 {
  font-size: 20px;
  color: var(--dark);
}

.manual-sec .msec-desc {
  color: var(--text-light);
  font-size: 14.5px;
  margin-bottom: 18px;
}

.manual-sec .msec-tip {
  background: #fff7ec;
  border: 1px solid #ffe1c0;
  border-radius: 10px;
  padding: 14px 18px;
  font-size: 13.5px;
  color: #9a5b1a;
  margin-bottom: 18px;
  line-height: 1.7;
}

.manual-sec .msec-warn {
  background: #fdf2f2;
  border: 1px solid #f5c6c6;
  border-radius: 10px;
  padding: 14px 18px;
  font-size: 13.5px;
  color: #a03030;
  margin-bottom: 18px;
  line-height: 1.7;
}

.manual-sec h3 {
  font-size: 15px;
  color: var(--primary);
  margin: 20px 0 10px;
  font-weight: 700;
}

.manual-sec ol,
.manual-sec ul {
  padding-left: 20px;
  margin-bottom: 10px;
}

.manual-sec ol li,
.manual-sec ul li {
  font-size: 14px;
  color: var(--text);
  margin-bottom: 8px;
  line-height: 1.75;
}

.manual-sec ul {
  list-style: disc;
}

.manual-sec .msec-kv {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 14px;
}

.manual-sec .msec-kv div {
  background: #f7f8fc;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 16px;
  font-size: 13.5px;
}

.manual-sec .msec-kv strong {
  color: var(--dark);
  display: block;
  margin-bottom: 4px;
}

.manual-sec .msec-kv span {
  color: var(--text-light);
}

@media (max-width: 768px) {
  .manual-layout {
    grid-template-columns: 1fr;
  }

  .manual-toc {
    position: static;
    max-height: none;
  }

  .manual-toc nav a {
    display: inline-block;
    border: none;
    border-right: 1px solid #f2f3f8;
    padding: 8px 14px;
    margin-bottom: 4px;
  }

  .manual-sec .msec-kv {
    grid-template-columns: 1fr;
  }
}

/* ============ Toast ============ */
.toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--dark);
  color: #fff;
  padding: 12px 24px;
  border-radius: 10px;
  font-size: 14px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s, transform 0.3s;
  z-index: 200;
  box-shadow: var(--shadow-lg);
}

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

/* ============ Responsive ============ */
@media (max-width: 1024px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .sys-req-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .scenario-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .module-grid {
    grid-template-columns: 1fr;
  }
  .hub-layout {
    grid-template-columns: 1fr;
  }
  .value-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--white);
    border-bottom: 1px solid var(--border);
    padding: 12px 16px 20px;
    display: none;
    box-shadow: var(--shadow);
  }

  .nav-menu.open {
    display: flex;
  }

  .nav-menu a {
    padding: 12px 14px;
    font-size: 16px;
  }

  .hero {
    padding: 56px 0 48px;
  }

  .hero .container {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .hero h1 {
    font-size: 34px;
  }

  .hero-stats {
    gap: 28px;
    flex-wrap: wrap;
  }

  .hero-stats .stat-divider {
    display: none;
  }

  .hero-frame {
    transform: none;
  }

  .hero-visual:hover .hero-frame {
    transform: none;
  }

  .hero-screenshot img {
    height: auto;
    max-height: 360px;
  }

  .chip-1 {
    top: 8%;
    left: -6px;
  }

  .chip-2 {
    bottom: 12%;
    right: -6px;
  }

  .chip-3 {
    top: -16px;
    right: 8px;
  }

  .feature-grid,
  .download-grid,
  .showcase,
  .sys-req-grid {
    grid-template-columns: 1fr;
  }

  .value-grid,
  .scenario-grid,
  .module-grid {
    grid-template-columns: 1fr;
  }

  .formula {
    flex-direction: column;
  }

  .formula .f-item {
    min-width: 0;
    width: 100%;
  }

  .formula .f-op {
    align-self: center;
  }

  .hub-flow {
    grid-template-columns: 1fr;
  }

  .closing-band h2 {
    font-size: 30px;
  }

  .showcase {
    gap: 32px;
  }

  .section {
    padding: 60px 0;
  }

  .section-head h2 {
    font-size: 28px;
  }

  .cta-band {
    padding: 40px 24px;
  }

  .cta-band h2 {
    font-size: 26px;
  }

  .full-course-card {
    flex-direction: column;
    align-items: flex-start;
    padding: 22px 20px;
  }

  .tutorial-layout {
    grid-template-columns: 1fr;
  }

  .tutorial-list {
    position: static;
  }

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

@media (max-width: 480px) {
  .hero-stats {
    flex-wrap: wrap;
    gap: 20px;
  }

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

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

/* ============ 手机端全面适配 ============ */

@media (max-width: 768px) {
  .container {
    padding: 0 18px;
  }

  .nav-actions .btn {
    display: none;
  }

  .nav-menu {
    top: 100%;
  }

  .nav-menu a {
    padding: 13px 16px;
  }

  .section {
    padding: 52px 0;
  }

  .section-head {
    margin-bottom: 36px;
  }

  .section-head h2 {
    font-size: 25px;
  }

  .section-head p {
    font-size: 15px;
  }

  .module-card {
    flex-direction: column;
    gap: 14px;
    padding: 26px 22px;
  }

  .hero-stats .stat strong {
    font-size: 26px;
  }

  .hero-cta {
    flex-direction: column;
  }

  .hero-cta .btn {
    width: 100%;
  }

  .value-grid,
  .scenario-grid,
  .feature-grid {
    gap: 16px;
  }

  .value-item,
  .scenario-card,
  .feature-card,
  .module-card,
  .download-card {
    border-radius: 14px;
  }

  .hub-layout {
    gap: 36px;
  }

  .hub-orb {
    width: 84px;
    height: 84px;
  }

  .closing-tags {
    gap: 8px;
  }

  .closing-tags span {
    padding: 7px 13px;
    font-size: 13px;
  }

  .cta-band {
    padding: 36px 22px;
  }

  .feature-hero-stats {
    gap: 20px;
    margin-top: 26px;
  }

  .feature-hero-stats .stat strong {
    font-size: 24px;
  }

  .feature-hero-stats .stat span {
    font-size: 13px;
  }

  .fgroup {
    margin-bottom: 48px;
  }

  .fgroup-head {
    gap: 14px;
  }

  .fgroup-head .fg-text h2 {
    font-size: 20px;
  }

  .fgroup-head .fg-text p {
    font-size: 13.5px;
  }

  .sub-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }

  .manual-sec {
    padding: 22px 18px 20px;
  }

  .manual-toc nav {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 10px 14px;
  }

  .manual-toc nav a {
    border: 1px solid var(--border);
    border-radius: 999px;
    margin: 0;
    padding: 7px 14px;
    font-size: 13px;
  }

  .tutorial-group-head {
    padding: 12px 16px;
  }

  .tutorial-item {
    padding: 10px 16px 10px 20px;
  }

  .download-note {
    font-size: 14px;
  }

  .sys-req-grid {
    gap: 12px;
  }

  .contact-tip {
    font-size: 14px;
    padding: 12px 16px;
  }

  .footer-qr {
    justify-content: flex-start;
  }
}

@media (max-width: 480px) {
  .brand {
    font-size: 16px;
    gap: 8px;
  }

  .brand-logo {
    height: 32px;
  }

  .navbar {
    height: 64px;
  }

  .hero {
    padding: 44px 0 40px;
  }

  .hero .container {
    gap: 36px;
  }

  .hero h1 {
    font-size: 28px;
  }

  .hero p.lead {
    font-size: 15.5px;
    margin-bottom: 26px;
  }

  .hero-badge {
    font-size: 12px;
    padding: 6px 12px;
  }

  .hero-stats {
    margin-top: 30px;
    gap: 18px;
  }

  .hero-stats .stat strong {
    font-size: 23px;
  }

  .hero-stats .stat span {
    font-size: 12.5px;
  }

  .hero-screenshot img {
    height: auto;
    max-height: 250px;
  }

  .hero-chip {
    padding: 8px 12px;
    gap: 8px;
    border-radius: 12px;
  }

  .hero-chip .hc-icon {
    width: 30px;
    height: 30px;
  }

  .hero-chip .hc-icon svg {
    width: 16px;
    height: 16px;
  }

  .hero-chip .hc-text strong {
    font-size: 12px;
  }

  .hero-chip .hc-text small {
    font-size: 10.5px;
  }

  .chip-1 {
    top: 6%;
    left: 6px;
  }

  .chip-2 {
    bottom: 8%;
    right: 6px;
  }

  .chip-3 {
    top: -14px;
    right: 6px;
  }

  .formula .f-item {
    padding: 14px 12px;
    font-size: 16px;
  }

  .formula-desc {
    font-size: 13.5px;
  }

  .value-item,
  .scenario-card,
  .feature-card {
    padding: 22px 18px;
  }

  .value-item h3 {
    font-size: 19px;
  }

  .scenario-card h3 {
    font-size: 17px;
  }

  .closing-band {
    padding: 48px 0;
  }

  .closing-band h2 {
    font-size: 24px;
  }

  .closing-band p {
    font-size: 14px;
  }

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

  .sub-card {
    padding: 20px 18px;
  }

  .group-cta {
    margin-top: 20px;
  }

  .page-hero {
    padding: 44px 0 40px;
  }

  .page-hero h1 {
    font-size: 27px;
  }

  .page-hero p {
    font-size: 14.5px;
  }

  .manual-sec .msec-head h2 {
    font-size: 17px;
  }

  .manual-sec .msec-desc {
    font-size: 13.5px;
  }

  .manual-sec ol li,
  .manual-sec ul li {
    font-size: 13.5px;
  }

  .tutorial-group-body {
    max-height: none;
    overflow-y: visible;
  }

  .tutorial-meta {
    padding: 16px 18px;
  }

  .tutorial-meta h2 {
    font-size: 18px;
  }

  .download-card .btn {
    width: 100%;
  }

  .contact-card {
    padding: 22px 16px 20px;
  }

  .contact-card .cc-qr img {
    width: 92px;
    height: 92px;
  }

  .footer-brand .brand {
    font-size: 17px;
  }

  .footer-qr {
    justify-content: center;
  }

  .footer-bottom {
    font-size: 13px;
  }
}