:root {
  --bg: #eef5ff;
  --bg-strong: #d9e7ff;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-strong: rgba(255, 255, 255, 0.92);
  --text: #172033;
  --muted: #52607a;
  --primary: #1259d8;
  --primary-deep: #0d3c92;
  --line: rgba(18, 89, 216, 0.12);
  --shadow: 0 24px 60px rgba(41, 81, 157, 0.14);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.95), transparent 30%),
    radial-gradient(circle at right 15%, rgba(93, 157, 255, 0.35), transparent 25%),
    linear-gradient(180deg, #f8fbff 0%, #eaf2ff 40%, #edf6ff 100%);
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

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

.page-shell {
  width: min(1200px, calc(100% - 32px));
  margin: 0 auto;
  padding: 24px 0 48px;
}

.hero,
.section,
.footer {
  position: relative;
}

.hero {
  overflow: hidden;
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 40px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.86), rgba(223, 236, 255, 0.72));
  box-shadow: var(--shadow);
}

.hero::before,
.hero::after {
  content: "";
  position: absolute;
  border-radius: 999px;
  filter: blur(8px);
}

.hero::before {
  top: -40px;
  right: -10px;
  width: 220px;
  height: 220px;
  background: rgba(98, 156, 255, 0.22);
}

.hero::after {
  left: -40px;
  bottom: 30px;
  width: 160px;
  height: 160px;
  background: rgba(255, 255, 255, 0.8);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 42px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.brand-mark {
  padding: 10px 14px;
  border-radius: 999px;
  background: linear-gradient(135deg, #0f57db, #7db5ff);
  color: #fff;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.brand-text,
.topbar-link,
.eyebrow,
.section-kicker {
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brand-text {
  color: var(--primary-deep);
  font-size: 0.95rem;
  font-weight: 700;
}

.topbar-link {
  padding: 12px 18px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--primary-deep);
  font-size: 0.88rem;
  font-weight: 700;
  box-shadow: 0 10px 30px rgba(18, 89, 216, 0.12);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: 32px;
  align-items: center;
}

.hero-copy {
  position: relative;
  z-index: 1;
}

.eyebrow,
.section-kicker {
  margin: 0 0 14px;
  color: var(--primary);
  font-size: 0.84rem;
  font-weight: 800;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 10em;
  margin-bottom: 16px;
  font-size: clamp(2.5rem, 5vw, 4.8rem);
  line-height: 1.02;
  letter-spacing: -0.04em;
}

.hero-description {
  max-width: 640px;
  margin-bottom: 26px;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.75;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 800;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.button:hover,
.call-card:hover,
.school-card:hover,
.feature-card:hover,
.process-card:hover {
  transform: translateY(-3px);
}

.button-primary {
  background: linear-gradient(135deg, #1259d8, #7aaeff);
  color: #fff;
  box-shadow: 0 18px 38px rgba(18, 89, 216, 0.28);
}

.button-secondary {
  border: 1px solid rgba(18, 89, 216, 0.14);
  background: rgba(255, 255, 255, 0.72);
  color: var(--primary-deep);
}

.hero-points {
  display: grid;
  gap: 12px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.hero-points li {
  position: relative;
  padding-left: 18px;
  color: #24314c;
  font-size: 0.98rem;
}

.hero-points li::before {
  content: "";
  position: absolute;
  top: 0.56em;
  left: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, #1259d8, #7eb2ff);
}

.hero-visual {
  position: relative;
  min-height: 560px;
}

.poster-card {
  position: relative;
  width: min(460px, 100%);
  margin: 0 auto;
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.92);
  border-radius: 32px;
  background: rgba(255, 255, 255, 0.6);
  box-shadow: 0 30px 80px rgba(35, 77, 154, 0.2);
  transform: rotate(4deg);
  backdrop-filter: blur(18px);
}

.poster-card img {
  border-radius: 22px;
  aspect-ratio: 720 / 1040;
  object-fit: cover;
}

.poster-glow {
  position: absolute;
  inset: 12px;
  z-index: -1;
  border-radius: 26px;
  background: linear-gradient(135deg, rgba(125, 180, 255, 0.55), rgba(255, 255, 255, 0.2));
  filter: blur(18px);
}

.floating-note {
  position: absolute;
  display: grid;
  gap: 4px;
  padding: 16px 18px;
  border: 1px solid rgba(255, 255, 255, 0.82);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 18px 40px rgba(38, 78, 152, 0.14);
  backdrop-filter: blur(12px);
}

.floating-note span {
  color: var(--muted);
  font-size: 0.82rem;
}

.floating-note strong {
  font-size: 1rem;
}

.note-top {
  top: 34px;
  left: 8px;
}

.note-bottom {
  right: 8px;
  bottom: 28px;
}

.section {
  padding: 78px 0 0;
}

.section-heading {
  display: grid;
  gap: 8px;
  margin-bottom: 28px;
}

h2 {
  max-width: 14em;
  font-size: clamp(1.9rem, 4vw, 3.2rem);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

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

.feature-card,
.process-card,
.school-card {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: 0 20px 38px rgba(26, 55, 116, 0.08);
  backdrop-filter: blur(14px);
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.feature-card h3,
.process-card h3,
.school-card h3 {
  margin-bottom: 12px;
  font-size: 1.2rem;
}

.feature-card p,
.process-card p,
.school-card p,
.cta-copy,
.footer p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.75;
}

.feature-icon,
.process-card strong {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin-bottom: 18px;
  border-radius: 14px;
  background: linear-gradient(135deg, #1259d8, #8bbdff);
  color: #fff;
  font-weight: 800;
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.tag-cloud span {
  padding: 14px 18px;
  border: 1px solid rgba(18, 89, 216, 0.12);
  border-radius: 999px;
  background: var(--surface-strong);
  color: #213150;
  font-weight: 700;
  box-shadow: 0 14px 32px rgba(34, 66, 125, 0.08);
}

.brand-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.95fr);
  gap: 18px;
  padding: 26px;
  border: 1px solid rgba(18, 89, 216, 0.1);
  border-radius: 30px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.92), rgba(224, 237, 255, 0.72));
  box-shadow: 0 24px 46px rgba(26, 55, 116, 0.08);
}

.brand-copy p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.8;
}

.brand-metrics {
  display: grid;
  gap: 14px;
}

.brand-metrics article {
  padding: 18px 20px;
  border: 1px solid rgba(18, 89, 216, 0.1);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.76);
}

.brand-metrics strong,
.wechat-card strong {
  display: block;
  margin-bottom: 8px;
  font-size: 1.15rem;
}

.brand-metrics span,
.wechat-card p {
  color: var(--muted);
  line-height: 1.7;
}

.school-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 18px;
}

.school-card {
  min-height: 250px;
}

.school-card span {
  display: inline-block;
  margin-top: 18px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.74);
  color: #314460;
  font-size: 0.9rem;
  font-weight: 700;
}

.accent-sky {
  background: linear-gradient(180deg, rgba(232, 242, 255, 0.92), rgba(255, 255, 255, 0.88));
}

.accent-gold {
  background: linear-gradient(180deg, rgba(255, 248, 228, 0.96), rgba(255, 255, 255, 0.88));
}

.accent-ink {
  background: linear-gradient(180deg, rgba(236, 242, 250, 0.96), rgba(255, 255, 255, 0.88));
}

.accent-rose {
  background: linear-gradient(180deg, rgba(255, 239, 242, 0.96), rgba(255, 255, 255, 0.88));
}

.accent-mint {
  background: linear-gradient(180deg, rgba(233, 248, 243, 0.96), rgba(255, 255, 255, 0.88));
}

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

.major-card {
  padding: 24px;
  border: 1px solid rgba(18, 89, 216, 0.1);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.8);
  box-shadow: 0 18px 40px rgba(26, 55, 116, 0.08);
}

.major-card ul,
.trust-list {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.major-card li,
.trust-list span {
  position: relative;
  display: block;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.9;
}

.major-card li::before,
.trust-list span::before {
  content: "";
  position: absolute;
  top: 0.78em;
  left: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, #1259d8, #8bbdff);
}

.lead-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 0.85fr) minmax(250px, 0.55fr);
  gap: 18px;
  align-items: stretch;
}

.lead-copy,
.lead-card,
.wechat-card {
  padding: 24px;
  border: 1px solid rgba(18, 89, 216, 0.1);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.84);
  box-shadow: 0 20px 42px rgba(26, 55, 116, 0.08);
}

.lead-copy p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.8;
}

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

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

.enroll-form span {
  font-size: 0.95rem;
  font-weight: 700;
}

.enroll-form input,
.enroll-form select {
  width: 100%;
  min-height: 52px;
  padding: 0 16px;
  border: 1px solid rgba(18, 89, 216, 0.14);
  border-radius: 16px;
  outline: none;
  background: rgba(244, 248, 255, 0.9);
  color: var(--text);
  font: inherit;
}

.enroll-form input:focus,
.enroll-form select:focus {
  border-color: rgba(18, 89, 216, 0.42);
  box-shadow: 0 0 0 4px rgba(18, 89, 216, 0.08);
}

.submit-button {
  width: 100%;
}

.form-note {
  margin-bottom: 0;
  color: var(--primary-deep);
  font-size: 0.92rem;
  line-height: 1.7;
}

.form-note.is-error {
  color: #b42318;
}

.wechat-card {
  display: grid;
  align-content: start;
  gap: 12px;
}

.qr-placeholder {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 24px;
  background:
    linear-gradient(90deg, rgba(18, 89, 216, 0.12) 10%, transparent 10%) 0 0 / 24px 24px,
    linear-gradient(rgba(18, 89, 216, 0.12) 10%, transparent 10%) 0 0 / 24px 24px,
    linear-gradient(135deg, #eaf2ff, #ffffff);
  border: 1px dashed rgba(18, 89, 216, 0.28);
  position: relative;
}

.qr-placeholder::before,
.qr-placeholder::after {
  content: "";
  position: absolute;
  width: 54px;
  height: 54px;
  border: 8px solid #1259d8;
  border-radius: 16px;
}

.qr-placeholder::before {
  top: 18px;
  left: 18px;
}

.qr-placeholder::after {
  right: 18px;
  bottom: 18px;
}

.cta-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
  gap: 20px;
  align-items: center;
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: 30px;
  background: linear-gradient(135deg, rgba(19, 77, 180, 0.95), rgba(105, 162, 255, 0.9));
  box-shadow: 0 26px 60px rgba(23, 61, 131, 0.25);
}

.cta-panel .section-kicker,
.cta-panel h2,
.cta-panel .cta-copy {
  color: #fff;
}

.call-card {
  display: grid;
  gap: 6px;
  padding: 20px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  backdrop-filter: blur(10px);
  transition: transform 180ms ease, background 180ms ease;
}

.call-card strong {
  font-size: 1.45rem;
  letter-spacing: 0.04em;
}

.footer {
  padding: 24px 0 0;
}

/* ======== Chat Widget ======== */
.chat-toggle {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, #1259d8, #5f9eff);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 28px rgba(18, 89, 216, 0.35);
  cursor: pointer;
  z-index: 1000;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  border: none;
}
.chat-toggle:hover {
  transform: scale(1.08);
  box-shadow: 0 12px 36px rgba(18, 89, 216, 0.45);
}

.chat-modal {
  position: fixed;
  bottom: 96px;
  right: 28px;
  width: 380px;
  height: 540px;
  background: #fff;
  border-radius: 24px;
  box-shadow: 0 16px 60px rgba(0, 0, 0, 0.18);
  z-index: 1001;
  display: none;
  flex-direction: column;
  overflow: hidden;
  animation: chatSlideUp 0.25s ease;
}
.chat-modal.open { display: flex; }

@keyframes chatSlideUp {
  from { opacity: 0; transform: translateY(20px) scale(0.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.chat-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  background: linear-gradient(135deg, #1259d8, #5f9eff);
  color: #fff;
  font-weight: 700;
  font-size: 0.95rem;
}
.chat-modal-header button {
  background: none;
  border: none;
  color: #fff;
  font-size: 1.4rem;
  cursor: pointer;
  opacity: 0.8;
  padding: 0 4px;
}
.chat-modal-header button:hover { opacity: 1; }

.chat-modal-body {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: #f8faff;
}

.chat-welcome {
  background: #e8f1ff;
  padding: 14px 16px;
  border-radius: 16px;
  color: #1a3a6a;
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: 8px;
}

.chat-msg {
  max-width: 88%;
  padding: 10px 16px;
  border-radius: 16px;
  font-size: 0.88rem;
  line-height: 1.6;
  animation: msgIn 0.2s ease;
}
.chat-msg.visitor {
  background: #1259d8;
  color: #fff;
  align-self: flex-end;
  border-bottom-right-radius: 4px;
}
.chat-msg.admin {
  background: #e8ecf2;
  color: #1a2332;
  align-self: flex-start;
  border-bottom-left-radius: 4px;
}
.chat-msg .chat-msg-meta {
  font-size: 0.7rem;
  opacity: 0.6;
  margin-top: 4px;
}

@keyframes msgIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.chat-modal-foot {
  padding: 12px 16px;
  border-top: 1px solid #eef2f7;
  background: #fff;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.chat-info-form {
  display: flex;
  gap: 8px;
}
.chat-info-form input {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid #d8e0ea;
  border-radius: 12px;
  font-size: 0.88rem;
  outline: none;
}
.chat-info-form input:focus {
  border-color: #4f8cff;
  box-shadow: 0 0 0 3px rgba(79, 140, 255, 0.1);
}

.chat-input-row {
  display: flex;
  gap: 8px;
  align-items: flex-end;
}
.chat-input-row textarea {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid #d8e0ea;
  border-radius: 12px;
  font-size: 0.88rem;
  resize: none;
  outline: none;
  font-family: inherit;
  min-height: 40px;
  max-height: 80px;
}
.chat-input-row textarea:focus {
  border-color: #4f8cff;
  box-shadow: 0 0 0 3px rgba(79, 140, 255, 0.1);
}
.chat-input-row button {
  padding: 10px 20px;
  border: none;
  border-radius: 12px;
  background: linear-gradient(135deg, #1259d8, #5f9eff);
  color: #fff;
  font-weight: 700;
  font-size: 0.88rem;
  cursor: pointer;
  white-space: nowrap;
  transition: opacity 0.15s;
}
.chat-input-row button:hover { opacity: 0.9; }
.chat-input-row button:disabled { opacity: 0.5; cursor: not-allowed; }

.chat-tip {
  font-size: 0.75rem;
  color: #6a7a94;
  text-align: center;
}

/* Toast */
#toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.toast-item {
  padding: 12px 20px;
  background: #1a2332;
  color: #fff;
  border-radius: 12px;
  font-size: 0.88rem;
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
  animation: toastIn 0.3s ease;
  max-width: 360px;
}
.toast-item.success { background: #16a34a; }
.toast-item.error { background: #e5493a; }

@keyframes toastIn {
  from { opacity: 0; transform: translateX(60px); }
  to { opacity: 1; transform: translateX(0); }
}

@media (max-width: 720px) {
  .chat-modal {
    right: 10px;
    bottom: 80px;
    width: calc(100vw - 20px);
    height: 480px;
  }
  .chat-toggle {
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
  }
}

@media (max-width: 1080px) {
  .hero-grid,
  .cta-panel,
  .feature-grid,
  .process-grid,
  .school-grid,
  .major-grid,
  .lead-grid,
  .brand-panel {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-visual {
    min-height: auto;
  }

  .note-top,
  .note-bottom {
    position: static;
    margin-top: 14px;
  }

  .poster-card {
    transform: none;
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(100% - 20px, 100%);
    padding-top: 10px;
  }

  .hero {
    padding: 20px;
    border-radius: 28px;
  }

  .topbar {
    margin-bottom: 28px;
  }

  .topbar,
  .hero-grid,
  .hero-actions,
  .cta-panel,
  .feature-grid,
  .process-grid,
  .school-grid,
  .cta-actions,
  .major-grid,
  .lead-grid,
  .brand-panel {
    grid-template-columns: 1fr;
    flex-direction: column;
  }

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

  .button,
  .topbar-link,
  .call-card {
    width: 100%;
  }

  h1 {
    max-width: none;
    font-size: 2.4rem;
  }

  h2 {
    max-width: none;
    font-size: 2rem;
  }

  .hero-description,
  .feature-card,
  .process-card,
  .school-card,
  .cta-panel {
    line-height: 1.65;
  }

  .poster-card {
    width: 100%;
    padding: 12px;
    border-radius: 24px;
  }

  .poster-card img {
    border-radius: 16px;
  }
}