:root {
  --ink: #17191e;
  --sub: #5d6470;
  --line: #e8e9ee;
  --bg: #ffffff;
  --bg-soft: #f7f7f9;
  --accent: #ef2e5d;
  --accent-dark: #d4244e;
  --accent-soft: #fdeef2;
  --yellow: #ffb800;
  --green: #17a558;
  --radius: 16px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font: 15px/1.55 "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { color: inherit; text-decoration: none; }
.fcol > button { display: block; border: 0; background: none; padding: 0; color: inherit; font: inherit; text-align: left; cursor: pointer; }
.muted { color: var(--sub); }

.topbar { border-bottom: 1px solid var(--line); background: #fff; position: sticky; top: 0; z-index: 20; }
.topbar-in { max-width: 1120px; margin: 0 auto; padding: 8px 20px; min-height: 64px; display: flex; align-items: center; flex-wrap: wrap; gap: 10px 28px; }
.logo { font-size: 20px; font-weight: 800; letter-spacing: -.2px; display: flex; align-items: center; gap: 8px; }
.logo-dot { width: 12px; height: 12px; border-radius: 4px; background: var(--accent); display: inline-block; }
.nav-links { display: flex; gap: 22px; font-size: 14.5px; color: var(--sub); }
.nav-links a { white-space: nowrap; }
.nav-links a:hover { color: var(--ink); }
.topbar-right { margin-left: auto; display: flex; align-items: center; gap: 16px; }
.phone { font-weight: 700; font-size: 14.5px; color: var(--ink); white-space: nowrap; }
.nav-user { display: flex; align-items: center; gap: 10px; font-size: 14px; }
.nav-user .who { color: var(--sub); white-space: nowrap; }

.container { max-width: 1120px; width: 100%; margin: 0 auto; padding: 0 20px; flex: 1; }

.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  border: 0;
  border-radius: 12px;
  padding: 13px 26px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: background .15s;
}
.btn:hover { background: var(--accent-dark); }
.btn.ghost { background: #fff; color: var(--ink); border: 1.5px solid var(--line); }
.btn.ghost:hover { border-color: #c9ccd6; background: #fff; }
.btn.small { padding: 9px 18px; font-size: 13.5px; border-radius: 10px; }

.hero { display: flex; gap: 48px; align-items: center; padding: 56px 0 40px; }
.hero-text { flex: 1.1; min-width: 0; }
.hero-kicker { display: inline-flex; align-items: center; gap: 6px; background: var(--accent-soft); color: var(--accent-dark); font-size: 13px; font-weight: 700; padding: 6px 12px; border-radius: 999px; margin-bottom: 18px; }
.hero h1 { font-size: 44px; line-height: 1.12; font-weight: 800; letter-spacing: -.5px; margin: 0 0 16px; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero-sub { font-size: 17px; color: var(--sub); max-width: 460px; margin: 0 0 26px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-note { font-size: 13px; color: var(--sub); margin-top: 14px; }
.hero-visual { flex: 1; min-width: 0; }

.stats { display: flex; gap: 40px; flex-wrap: wrap; border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 28px; margin: 8px 0 56px; }
.stat b { font-size: 26px; font-weight: 800; display: block; letter-spacing: -.3px; }
.stat span { font-size: 13.5px; color: var(--sub); }

.section { margin-bottom: 64px; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 24px; }
.section-head h2 { font-size: 30px; font-weight: 800; letter-spacing: -.3px; margin: 0; }
.section-head a { color: var(--accent); font-weight: 600; font-size: 14.5px; }
.soft { background: var(--bg-soft); border-radius: 24px; padding: 48px 0; margin: 0 -32px; }

.cats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 64px; }
.cat { border: 1px solid var(--line); border-radius: 14px; padding: 16px 18px; display: flex; justify-content: space-between; align-items: center; font-weight: 600; font-size: 14.5px; }
.cat:hover { border-color: #c9ccd6; }
.cat .cnt { color: var(--sub); font-weight: 400; font-size: 13px; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 20px; }
.course-card { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: #fff; transition: box-shadow .15s; display: flex; flex-direction: column; }
.course-card:hover { box-shadow: 0 8px 28px rgba(23,25,30,.08); }
.cover { height: 140px; display: block; }
.cc-body { padding: 16px 18px 18px; display: flex; flex-direction: column; flex: 1; }
.cc-meta { font-size: 13px; color: var(--sub); margin-bottom: 6px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cc-title { font-size: 17px; font-weight: 700; margin: 0 0 12px; line-height: 1.35; }
.cc-bottom { margin-top: auto; display: flex; flex-direction: column; align-items: flex-start; gap: 10px; }
.price { font-size: 13px; color: var(--sub); display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; }
.price b { font-size: 16px; color: var(--ink); font-weight: 800; white-space: nowrap; }
.price s { opacity: .7; white-space: nowrap; }
.price .mo { display: block; font-size: 12px; width: 100%; }

.how { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.step { background: #fff; border-radius: var(--radius); padding: 22px; }
.step .num { width: 34px; height: 34px; border-radius: 10px; background: var(--accent-soft); color: var(--accent-dark); font-weight: 800; display: flex; align-items: center; justify-content: center; margin-bottom: 12px; }
.step h3 { margin: 0 0 6px; font-size: 16px; }
.step p { margin: 0; font-size: 13.5px; color: var(--sub); }

.teachers { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.tcard { border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; text-align: center; }
.avatar { width: 64px; height: 64px; border-radius: 50%; margin: 0 auto 12px; display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 20px; color: #fff; }
.tcard h3 { margin: 0 0 2px; font-size: 15.5px; }
.tcard .role { font-size: 13px; color: var(--sub); margin-bottom: 8px; }
.tcard .bio { font-size: 12.5px; color: var(--sub); }

.reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.rcard { border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; display: flex; flex-direction: column; }
.stars { color: var(--yellow); font-size: 15px; letter-spacing: 2px; margin-bottom: 10px; }
.rcard blockquote { margin: 0 0 14px; font-size: 14px; color: #2b303a; }
.rwho { margin-top: auto; display: flex; gap: 10px; align-items: center; }
.rwho .avatar { width: 40px; height: 40px; font-size: 13px; margin: 0; }
.rwho b { font-size: 13.5px; display: block; }
.rwho span { font-size: 12.5px; color: var(--sub); }

.faq { max-width: 760px; }
.faq details { border-bottom: 1px solid var(--line); padding: 14px 0; }
.faq summary { font-weight: 700; font-size: 15.5px; cursor: pointer; list-style: none; display: flex; justify-content: space-between; }
.faq summary::after { content: "+"; color: var(--accent); font-size: 20px; }
.faq details[open] summary::after { content: "–"; }
.faq p { color: var(--sub); font-size: 14px; margin: 10px 0 0; }

.cta { background: var(--ink); border-radius: 24px; color: #fff; padding: 44px 48px; display: flex; align-items: center; justify-content: space-between; gap: 24px; margin-bottom: 64px; }
.cta h2 { margin: 0 0 8px; font-size: 28px; font-weight: 800; }
.cta p { margin: 0; color: #a7adbb; }

.dash-head { display: flex; align-items: baseline; justify-content: space-between; margin: 28px 0 20px; }
.dash-head h1 { font-size: 28px; font-weight: 800; margin: 0; }
.panel { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; margin-bottom: 20px; }
.panel h3 { margin: 0 0 4px; font-size: 18px; }
.panel .meta { color: var(--sub); font-size: 13.5px; margin-bottom: 14px; }
.chip { display: inline-block; background: var(--bg-soft); border: 1px solid var(--line); border-radius: 999px; padding: 6px 14px; font-size: 13px; margin: 0 6px 6px 0; }

.form label { display: block; font-size: 13px; color: var(--sub); margin: 12px 0 5px; }
.form input, .form textarea { width: 100%; padding: 12px 14px; border: 1px solid var(--line); border-radius: 10px; font: 14.5px "Segoe UI", Roboto, Arial, sans-serif; background: #fff; }
.form input:focus, .form textarea:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }
.form textarea { min-height: 90px; resize: vertical; }
.form .note { font-size: 12.5px; color: var(--sub); margin-top: 6px; }
.form .actions { margin-top: 16px; display: flex; align-items: center; gap: 12px; }

.list { display: flex; flex-direction: column; gap: 10px; }
.item { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 16px 18px; font-size: 14px; }
.item .head { display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.item .time { color: var(--sub); font-size: 12.5px; }
.item .body { color: #2b303a; margin-top: 6px; white-space: pre-wrap; }
.item .lnk { color: var(--accent); word-break: break-all; font-size: 12.5px; margin-top: 6px; display: block; }

.badge { font-size: 12px; font-weight: 700; border-radius: 999px; padding: 4px 12px; }
.badge.sent { background: var(--bg-soft); color: var(--sub); }
.badge.read { background: #e9f7ef; color: var(--green); }
.badge.error { background: var(--accent-soft); color: var(--accent-dark); }

.teacher-panel { border-color: #f2dfa0; background: #fffaf0; }
.teacher-panel h3 { color: #8a6a10; }
.exam-result { margin-top: 14px; background: #fffdf5; border: 1px dashed #d9bd66; border-radius: 12px; padding: 16px; font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 13.5px; white-space: pre-wrap; word-break: break-all; }
.errbox { background: var(--accent-soft); color: var(--accent-dark); border-radius: 14px; padding: 16px 20px; margin: 32px 0 20px; font-size: 14.5px; }

.footer { background: var(--bg-soft); border-top: 1px solid var(--line); margin-top: 24px; }
.footer-in { max-width: 1120px; margin: 0 auto; padding: 40px 20px 24px; }
.footer-cols { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; padding-bottom: 32px; }
.fcol { display: flex; flex-direction: column; gap: 9px; font-size: 13.5px; color: var(--sub); }
.fcol a:hover { color: var(--ink); }
.fcol .muted { font-size: 12.5px; }
.fhead { font-weight: 700; color: var(--ink); font-size: 14px; margin-bottom: 4px; }
.footer-bottom { border-top: 1px solid var(--line); padding-top: 18px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; font-size: 12.5px; color: var(--sub); }

@media (max-width: 1150px) {
  .phone { display: none; }
}
@media (max-width: 960px) {
  .hero { flex-direction: column; padding-top: 32px; }
  .hero h1 { font-size: 32px; }
  .hero-visual { width: 100%; }
  .how, .teachers, .reviews { grid-template-columns: 1fr 1fr; }
  .cats { grid-template-columns: 1fr 1fr; }
  .nav-links { display: none; }
  .stats { gap: 24px; }
}

.toolbar { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin-bottom: 18px; }
.tsearch { flex: 1; min-width: 200px; padding: 11px 14px; border: 1px solid var(--line); border-radius: 10px; font: 14px "Segoe UI", Roboto, Arial, sans-serif; }
.tsel { padding: 11px 12px; border: 1px solid var(--line); border-radius: 10px; background: #fff; font: 14px "Segoe UI", Roboto, Arial, sans-serif; color: var(--ink); }
.tfilter { display: inline-flex; align-items: center; gap: 6px; background: var(--accent-soft); color: var(--accent-dark); font-size: 13px; font-weight: 600; padding: 9px 12px; border-radius: 10px; }
.tfilter a { color: var(--accent-dark); text-decoration: none; font-size: 15px; }
.cc-desc { font-size: 13.5px; color: var(--sub); margin: 0 0 12px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.cc-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.facts { margin: 8px 0 0; padding-left: 18px; font-size: 12.5px; color: var(--sub); }
.facts li { margin-bottom: 3px; }
.tcard.active { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-soft); }
.tcourses { margin-top: 10px; }
.tcourses .chip { font-size: 11.5px; padding: 4px 10px; }
#r-form h3 { margin: 0 0 4px; font-size: 18px; }
#modal { position: fixed; inset: 0; background: rgba(23,25,30,.5); display: flex; align-items: center; justify-content: center; z-index: 50; padding: 20px; }
.modal-card { background: #fff; border-radius: 18px; max-width: 560px; width: 100%; max-height: 86vh; overflow: auto; position: relative; }
.modal-x { position: absolute; top: 10px; right: 12px; background: #fff; border: 1px solid var(--line); border-radius: 10px; width: 34px; height: 34px; font-size: 18px; cursor: pointer; z-index: 2; }
.modal-body { padding: 20px 24px 24px; }
.modal-body h3 { margin: 8px 0 6px; font-size: 21px; }
.modules { margin: 8px 0 0; padding-left: 20px; font-size: 14px; color: #2b303a; }
.modules li { margin-bottom: 5px; }

.prowlist { display: flex; flex-direction: column; gap: 8px; }
.prow { display: flex; align-items: center; gap: 12px; padding: 8px 12px; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
.ptitle { flex: 1; font-size: 14px; font-weight: 600; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pbar { width: 160px; height: 8px; border-radius: 4px; background: var(--bg-soft); overflow: hidden; flex: none; }
.pbar i { display: block; height: 100%; background: var(--accent); border-radius: 4px; }
.ppct { font-size: 12.5px; color: var(--sub); width: 38px; text-align: right; flex: none; }

.nav-links a.active { color: var(--ink); font-weight: 600; }

.toggle { min-width: 118px; }
.toggle .off { display: none; }
.toggle.enrolled { background: #e9f7ef; color: #1e8e5a; border: 1px solid #bcdcc2; }
.toggle.enrolled:hover { background: var(--accent-soft); color: var(--accent-dark); border-color: #e3c1c1; }
.toggle.enrolled:hover .on { display: none; }
.toggle.enrolled:hover .off { display: inline; }

#toast { position: fixed; left: 50%; bottom: 26px; transform: translateX(-50%) translateY(16px);
  background: #17191e; color: #fff; font-size: 14px; padding: 11px 20px; border-radius: 12px;
  opacity: 0; pointer-events: none; transition: all .25s; z-index: 100; max-width: 86vw; }
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.item .reply { margin-top: 10px; border-left: 3px solid var(--green); background: var(--bg-soft); border-radius: 8px; padding: 10px 12px; }
.item .reply-head { font-weight: 700; font-size: 12.5px; color: var(--green); margin-bottom: 4px; }
.item .reply-body { white-space: pre-wrap; word-break: break-all; color: #2b303a; }
.badge.answered { background: #e9f7ef; color: var(--green); }