:root {
  --bg: #f4f7fb;
  --card: #ffffff;
  --line: #e3eaf5;
  --text: #1f2a44;
  --muted: #64748b;
  --primary: #2d5bff;
  --primary-dark: #1236b8;
  --accent: #19c4d7;
  --navy: #07142f;
  --success: #24b47e;
  --warning: #ffb347;
  --danger: #ff5d73;
  --shadow: 0 18px 50px rgba(33, 64, 154, 0.12);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --container: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

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

img {
  display: block;
  max-width: 100%;
  image-rendering: -webkit-optimize-contrast;
}

button,
input {
  font: inherit;
}

.container {
  width: min(var(--container), calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(227, 234, 245, 0.9);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 78px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0;
  line-height: 0;
  color: var(--text);
}

.brand-name {
  display: block;
  width: 214px;
  height: 42px;
  background: left center / contain no-repeat var(--brand-logo-top-image, url("assets/logo-text-red.png"));
  color: transparent;
  white-space: nowrap;
  text-indent: 101%;
  overflow: hidden;
  user-select: none;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.nav-links a {
  padding: 10px 14px;
  border-radius: 999px;
  color: #41506f;
  font-size: 15px;
  font-weight: 600;
}

.nav-links a.active,
.nav-links a:hover {
  color: var(--primary);
  background: rgba(45, 91, 255, 0.08);
}

.nav-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 700;
  transition: 0.2s ease;
}

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

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  box-shadow: 0 14px 28px rgba(45, 91, 255, 0.22);
}

.btn-secondary {
  color: var(--primary);
  border-color: rgba(45, 91, 255, 0.18);
  background: rgba(45, 91, 255, 0.04);
}

.hero {
  padding: 72px 0 56px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 34px;
  align-items: center;
}

.hero-copy h1,
.page-title {
  margin: 0 0 18px;
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1.12;
  letter-spacing: -0.03em;
}

.hero-copy p,
.section-lead,
.page-subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 18px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  margin: 30px 0 18px;
  flex-wrap: wrap;
}

.hero-meta {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 14px;
}

.hero-card,
.glass-card {
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(247, 250, 255, 0.92));
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hero-card {
  padding: 18px;
}

.hero-card img {
  width: 100%;
  border-radius: 20px;
}

.section {
  padding: 34px 0;
}

.section-heading {
  margin-bottom: 28px;
  text-align: center;
}

.section-heading h2 {
  margin: 0 0 10px;
  font-size: clamp(28px, 3vw, 40px);
}

.section-heading p {
  margin: 0;
  color: var(--muted);
}

.grid {
  display: grid;
  gap: 20px;
}

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

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: 0 10px 25px rgba(15, 30, 75, 0.05);
}

.card:hover {
  border-color: rgba(45, 91, 255, 0.25);
  box-shadow: 0 18px 35px rgba(15, 30, 75, 0.08);
}

.card-icon {
  width: 52px;
  height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  margin-bottom: 18px;
  font-weight: 700;
}

.soft-blue { background: rgba(45, 91, 255, 0.1); color: var(--primary); }
.soft-green { background: rgba(36, 180, 126, 0.12); color: var(--success); }
.soft-purple { background: rgba(143, 98, 255, 0.12); color: #7b4dff; }
.soft-orange { background: rgba(255, 179, 71, 0.14); color: #d78b19; }
.soft-pink { background: rgba(255, 93, 115, 0.12); color: var(--danger); }
.soft-cyan { background: rgba(25, 196, 215, 0.13); color: #1290a0; }

.card h3 {
  margin: 0 0 10px;
  font-size: 22px;
}

.card p {
  margin: 0;
  color: var(--muted);
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 18px;
  color: var(--primary);
  font-weight: 700;
}

.stats-band {
  margin: 22px 0;
  padding: 34px;
  border-radius: var(--radius-lg);
  color: #fff;
  background: linear-gradient(135deg, #1236b8, #2d5bff 50%, #19c4d7);
  box-shadow: var(--shadow);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.stat strong {
  display: block;
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1;
}

.stat span {
  display: block;
  margin-top: 8px;
  color: rgba(255, 255, 255, 0.85);
}

.feature-compare {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 22px;
}

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

.comparison-table th,
.comparison-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.comparison-table th {
  color: rgba(255, 255, 255, 0.78);
  font-weight: 600;
}

.blue-panel {
  padding: 30px;
  border-radius: var(--radius-lg);
  color: #fff;
  background: linear-gradient(135deg, #173eb8, #264cdc 52%, #6534e8);
  box-shadow: var(--shadow);
}

.panel-muted {
  color: rgba(255, 255, 255, 0.82);
}

.tag-row,
.badge-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.tag,
.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 0 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
}

.tag {
  color: var(--primary);
  background: rgba(45, 91, 255, 0.08);
}

.badge {
  color: #fff;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.search-box,
.form-grid {
  display: grid;
  gap: 14px;
}

.search-box {
  grid-template-columns: 1fr auto;
  margin-top: 28px;
}

.input {
  height: 54px;
  width: 100%;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.96);
  color: var(--text);
  outline: none;
}

.input:focus {
  border-color: rgba(45, 91, 255, 0.45);
  box-shadow: 0 0 0 4px rgba(45, 91, 255, 0.08);
}

.service-tabs {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 22px 0 6px;
}

.service-tabs span {
  min-height: 38px;
  padding: 0 16px;
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--line);
  color: #567;
  font-size: 14px;
  font-weight: 700;
}

.service-tabs span.active {
  color: #fff;
  background: var(--primary);
  border-color: var(--primary);
}

.logo-cloud {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 16px;
}

.logo-item {
  min-height: 86px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 18px;
  background: #fff;
  border: 1px solid var(--line);
  color: #445271;
  font-weight: 700;
}

.cta-box {
  padding: 40px;
  border-radius: var(--radius-lg);
  color: #fff;
  background: linear-gradient(135deg, #1a4af8, #562ee8);
  box-shadow: var(--shadow);
}

.form-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 20px;
}

.form-grid .input {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.14);
}

.form-grid .input::placeholder {
  color: rgba(255, 255, 255, 0.7);
}

.two-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}

.list-card {
  display: flex;
  gap: 14px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.list-card:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.list-card:first-child {
  padding-top: 0;
}

.news-date,
.tiny {
  color: var(--muted);
  font-size: 13px;
}

.price {
  font-size: 28px;
  color: var(--primary);
  font-weight: 800;
}

.course-media,
.service-media,
.overview-media {
  width: 100%;
  border-radius: 18px;
  overflow: hidden;
  margin-bottom: 18px;
  background: linear-gradient(135deg, #dfe8ff, #eff5ff);
}

.service-media img,
.course-media img,
.overview-media img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.mini-rating {
  display: flex;
  justify-content: space-between;
  margin-top: 16px;
  color: var(--muted);
  font-size: 14px;
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.step {
  position: relative;
  padding: 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  min-height: 190px;
}

.step-number {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  margin-bottom: 14px;
  font-weight: 800;
}

.dashboard {
  display: grid;
  gap: 18px;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.metric {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 18px;
}

.metric strong {
  display: block;
  font-size: 34px;
  margin-top: 10px;
}

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

.table-like tr + tr td {
  border-top: 1px solid var(--line);
}

.table-like td {
  padding: 18px 0;
}

.trend-up { color: var(--success); }
.trend-down { color: var(--danger); }

.recent-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.recent-tools span {
  min-height: 42px;
  padding: 0 16px;
  border-radius: 999px;
  background: rgba(45, 91, 255, 0.06);
  color: #40547f;
  display: inline-flex;
  align-items: center;
  font-weight: 700;
}

.about-overview {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 28px;
  align-items: center;
}

.mini-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 24px;
}

.mini-stats .metric {
  min-height: 118px;
}

.culture-honor {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 24px;
}

.award-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.award {
  display: grid;
  place-items: center;
  min-height: 180px;
  border-radius: 20px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, #ffffff, #eef4ff);
  text-align: center;
  font-weight: 700;
}

.award-medal {
  width: 84px;
  height: 84px;
  border-radius: 24px;
  margin-bottom: 12px;
  background: linear-gradient(135deg, #ffdc83, #dca128);
}

.award-certificate {
  width: 92px;
  height: 64px;
  border-radius: 12px;
  margin-bottom: 12px;
  background: linear-gradient(135deg, #dbe7ff, #8eb2ff);
}

.page-hero {
  padding: 64px 0 24px;
}

.page-hero .glass-card {
  padding: 18px;
}

.page-hero-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 28px;
  align-items: center;
}

.footer {
  margin-top: 40px;
  color: rgba(255, 255, 255, 0.8);
  background: var(--navy);
}

.footer-top {
  display: grid;
  grid-template-columns: 1.2fr 0.9fr 0.9fr 0.9fr;
  gap: 24px;
  padding: 56px 0 34px;
}

.footer h4 {
  margin: 0 0 14px;
  color: #fff;
}

.footer p,
.footer a {
  color: rgba(255, 255, 255, 0.72);
}

.footer .brand {
  color: #fff;
  display: inline-flex;
  padding: 0;
}

.footer .brand-name {
  background-image: var(--brand-logo-footer-image, url("assets/logo-text-white.png"));
  filter:
    drop-shadow(0 0 10px rgba(255, 255, 255, 0.42))
    drop-shadow(0 0 22px rgba(255, 255, 255, 0.28));
}

.footer-nav {
  display: grid;
  gap: 10px;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 0 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  flex-wrap: wrap;
}

.socials {
  display: flex;
  gap: 10px;
}

.socials span {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  font-weight: 700;
}

.clickable-card {
  cursor: pointer;
}

.textarea {
  min-height: 120px;
  padding-top: 16px;
  resize: vertical;
}

body.modal-open {
  overflow: hidden;
}

.site-modal {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: none;
}

.site-modal.is-open {
  display: block;
}

.site-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(7, 20, 47, 0.58);
  backdrop-filter: blur(8px);
}

.site-modal__dialog {
  position: relative;
  width: min(560px, calc(100% - 24px));
  margin: 6vh auto;
  border-radius: 28px;
  background: #fff;
  box-shadow: 0 30px 90px rgba(15, 30, 75, 0.24);
}

.site-modal__dialog.is-wide {
  width: min(760px, calc(100% - 24px));
}

.site-modal__close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: 50%;
  background: rgba(45, 91, 255, 0.08);
  color: var(--primary);
  font-size: 26px;
  cursor: pointer;
}

.site-modal__content {
  padding: 32px;
}

.popup-card__badge {
  display: inline-flex;
  min-height: 34px;
  padding: 0 14px;
  align-items: center;
  border-radius: 999px;
  color: var(--primary);
  background: rgba(45, 91, 255, 0.08);
  font-size: 13px;
  font-weight: 700;
}

.popup-card h2 {
  margin: 16px 0 12px;
  font-size: clamp(28px, 4vw, 36px);
  line-height: 1.18;
}

.popup-card__lead {
  margin: 0 0 20px;
  color: var(--muted);
  font-size: 16px;
}

.popup-form {
  display: grid;
  gap: 14px;
}

.form-field {
  display: grid;
  gap: 8px;
}

.form-field span {
  font-size: 14px;
  font-weight: 700;
  color: #30405f;
}

.popup-form .input {
  background: #fff;
}

.tool-config-tip {
  display: grid;
  gap: 4px;
  margin: 18px 0;
  padding: 14px 16px;
  border-radius: 18px;
  border: 1px solid rgba(45, 91, 255, 0.14);
  background: rgba(45, 91, 255, 0.05);
}

.tool-config-tip strong {
  font-size: 14px;
}

.tool-config-tip span {
  color: var(--muted);
  font-size: 14px;
}

.detail-stack {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.detail-stack__item {
  display: grid;
  gap: 6px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #f8fbff;
}

.detail-stack__item strong {
  font-size: 14px;
}

.detail-stack__item span {
  color: var(--muted);
}

.contact-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 22px;
  padding: 18px 20px;
  border-radius: 18px;
  background: linear-gradient(135deg, #edf3ff, #f7fbff);
}

.contact-strip a {
  color: var(--primary);
  font-size: 20px;
  font-weight: 800;
}

.popup-card--success h2 {
  color: var(--primary);
}

.ai-loading {
  display: flex;
  gap: 10px;
  margin: 10px 0 20px;
}

.ai-loading__dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--primary);
  opacity: 0.35;
  animation: pulse-dot 1.2s infinite ease-in-out;
}

.ai-loading__dot:nth-child(2) {
  animation-delay: 0.15s;
}

.ai-loading__dot:nth-child(3) {
  animation-delay: 0.3s;
}

.ai-result {
  padding: 18px 20px;
  border-radius: 18px;
  background: #f8fbff;
  border: 1px solid var(--line);
  color: #253456;
  white-space: normal;
  line-height: 1.8;
}

.qr-panel {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 18px;
  align-items: center;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: #f8fbff;
}

.qr-panel__image {
  width: 100%;
  max-width: 180px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: #fff;
}

.qr-panel__meta {
  display: grid;
  gap: 8px;
}

.qr-panel__meta span {
  color: var(--muted);
}

@keyframes pulse-dot {
  0%,
  80%,
  100% {
    transform: scale(0.8);
    opacity: 0.35;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}

.course-detail-hero {
  padding: 62px 0 30px;
}

.course-detail-layout {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 26px;
  align-items: start;
}

.course-detail-media img {
  width: 100%;
  border-radius: 22px;
}

.course-detail-meta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.course-detail-price {
  margin: 18px 0;
  font-size: 38px;
  color: var(--primary);
  font-weight: 800;
}

.course-detail-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 16px;
}

.pay-options {
  display: none;
  gap: 12px;
  margin-top: 16px;
  flex-wrap: wrap;
}

.pay-options.is-open {
  display: flex;
}

.pay-option {
  min-height: 48px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid rgba(45, 91, 255, 0.16);
  background: rgba(45, 91, 255, 0.06);
  color: var(--primary);
  font-weight: 700;
}

.outline-list {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
}

.outline-list li + li {
  margin-top: 10px;
}

@media (max-width: 1080px) {
  .hero-grid,
  .feature-compare,
  .page-hero-grid,
  .about-overview,
  .culture-honor,
  .course-detail-layout,
  .two-panel,
  .footer-top {
    grid-template-columns: 1fr;
  }

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

  .grid-3,
  .steps,
  .stats-grid,
  .logo-cloud,
  .metric-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .nav-wrap {
    padding: 14px 0;
    align-items: flex-start;
    flex-direction: column;
  }

  .hero,
  .page-hero {
    padding-top: 38px;
  }

  .brand-name {
    width: 176px;
    height: 34px;
  }

  .hero-copy h1,
  .page-title {
    font-size: 36px;
  }

  .grid-2,
  .grid-3,
  .grid-4,
  .steps,
  .stats-grid,
  .logo-cloud,
  .form-grid,
  .metric-grid,
  .mini-stats,
  .award-grid {
    grid-template-columns: 1fr;
  }

  .search-box {
    grid-template-columns: 1fr;
  }

  .cta-box,
  .stats-band,
  .blue-panel,
  .card {
    padding: 22px;
  }

  .site-modal__content {
    padding: 24px;
  }

  .contact-strip {
    align-items: flex-start;
    flex-direction: column;
  }

  .qr-panel {
    grid-template-columns: 1fr;
  }
}