/* UITG 英语角落地页 A · 窗边气质，底色偏浅苔绿（区别加油站米色） */
:root {
  --ink: #2c3d34;
  --muted: #5f7268;
  --foam: #f4f8f5;
  --cream: #e4eee8;
  --paper: #fffcf8;
  --wood: #5f8a72;
  --espresso: #2f4a3c;
  --steam: #8aa894;
  --sage: #6d9a80;
  --sage-deep: #4e7a62;
  --dusk: #5c6f82;
  --dusk-deep: #4a6174;
  --line: #d5e4db;
  --shadow: 0 18px 40px rgba(47, 74, 60, 0.08);
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body.ec {
  font: 18px/1.65 "Iowan Old Style", Palatino, "Songti SC", "Source Han Serif SC", serif;
  color: var(--ink);
  background:
    radial-gradient(1200px 520px at 78% -8%, rgba(255, 255, 252, 0.95), transparent 58%),
    radial-gradient(900px 480px at 12% 8%, rgba(210, 228, 216, 0.45), transparent 55%),
    linear-gradient(180deg, #eaf3ed 0%, var(--foam) 42%, #f3f7f4 100%);
  min-height: 100vh;
}
.ec a { color: var(--wood); }
.ec-shell {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 28px 72px;
}

.ec-bar {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 22px 0 8px;
}
.ec-brand {
  text-decoration: none;
  color: var(--espresso);
  font-weight: 700;
  letter-spacing: 0.02em;
}
.ec-brand small {
  display: block;
  margin-top: 2px;
  font-size: 0.72rem;
  font-weight: 400;
  color: var(--muted);
  letter-spacing: 0.12em;
}
.ec-bar nav a {
  margin-left: 18px;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.92rem;
}
.ec-bar nav a:hover { color: var(--espresso); }

.ec-hero {
  text-align: center;
  padding: 28px 0 40px;
}
.ec-window {
  width: 92px;
  height: 110px;
  margin: 0 auto 22px;
  display: block;
}
.ec-k {
  margin: 0 0 10px;
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--wood);
  font-family: "Segoe UI", "PingFang SC", sans-serif;
  font-weight: 600;
}
.ec-hero h1 {
  margin: 0 0 16px;
  font-size: clamp(2.4rem, 6vw, 3.4rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.15;
  color: var(--espresso);
}
.ec-hero .lead {
  margin: 0 auto 12px;
  max-width: 22.5em;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.7;
  text-wrap: pretty;
}
.ec-price {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  margin: 22px auto 0;
  padding: 12px 22px 14px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 999px;
  box-shadow: var(--shadow);
}
.ec-price b {
  font-size: 1.65rem;
  color: var(--espresso);
  letter-spacing: 0.02em;
}
.ec-price span {
  color: var(--muted);
  font-size: 0.95rem;
}
.ec-price em {
  font-style: normal;
  color: var(--steam);
  font-size: 0.82rem;
  padding-left: 8px;
  border-left: 1px solid var(--line);
  font-family: "Segoe UI", "PingFang SC", sans-serif;
}
.ec-cta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin: 24px 0 0;
  align-items: center;
}
.ec-btn {
  display: inline-block;
  background: var(--espresso);
  color: #fffdf8 !important;
  text-decoration: none;
  font-weight: 700;
  font-family: "Segoe UI", "PingFang SC", sans-serif;
  padding: 13px 26px;
  border-radius: 999px;
  border: 2px solid var(--espresso);
}
.ec-btn:hover { background: #254536; }
.ec-btn-ghost {
  background: transparent;
  color: var(--espresso) !important;
}
.ec-btn-ghost:hover { background: rgba(76, 52, 41, 0.06); }
.ec-btn-text {
  font-size: 0.92rem;
  font-family: "Segoe UI", "PingFang SC", sans-serif;
  font-weight: 600;
  color: var(--muted);
  text-decoration: none;
}

.ec-modes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin: 8px 0 48px;
  align-items: stretch;
}
.ec-mode {
  display: flex;
  flex-direction: column;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 22px 24px 22px;
  box-shadow: var(--shadow);
  min-height: 100%;
}
.ec-mode h2 {
  margin: 10px 0 10px;
  font-size: 1.4rem;
  line-height: 1.3;
  min-height: 1.3em;
}
.ec-mode p {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 0.98rem;
  line-height: 1.65;
  text-wrap: pretty;
  flex: 1;
}
.ec-mode ul {
  margin: 0 0 16px;
  padding: 0;
  list-style: none;
  color: var(--ink);
  font-size: 0.95rem;
}
.ec-mode li {
  padding: 6px 0 6px 1.1em;
  position: relative;
}
.ec-mode li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.85em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--steam);
}
.ec-tag {
  display: inline-flex;
  align-items: center;
  height: 26px;
  font-family: "Segoe UI", "PingFang SC", sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  font-weight: 700;
  text-transform: uppercase;
  padding: 0 10px;
  border-radius: 999px;
  align-self: flex-start;
}
.ec-mode-off .ec-tag { background: #e7efe2; color: var(--sage-deep); }
.ec-mode-on .ec-tag { background: #e4ebf2; color: var(--dusk-deep); }
.ec-mode-off { border-top: 4px solid var(--sage); }
.ec-mode-on { border-top: 4px solid var(--dusk); }
.ec-mode .ec-btn { width: 100%; text-align: center; margin-top: auto; }
.ec-mode-off .ec-btn { background: var(--sage-deep); border-color: var(--sage-deep); }
.ec-mode-on .ec-btn { background: var(--dusk-deep); border-color: var(--dusk-deep); }

.ec-block { margin: 0 0 44px; text-align: center; }
.ec-block h2 {
  margin: 0 0 8px;
  font-size: 1.55rem;
  color: var(--espresso);
}
.ec-block .sub {
  margin: 0 auto 22px;
  max-width: 22.5em;
  color: var(--muted);
  line-height: 1.7;
  text-wrap: pretty;
}
.ec-facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  text-align: left;
}
.ec-fact {
  background: rgba(255, 253, 248, 0.72);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 18px 16px 16px;
}
.ec-fact h3 { margin: 0 0 8px; font-size: 1.05rem; }
.ec-fact p { margin: 0; color: var(--muted); font-size: 0.95rem; }

.ec-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  text-align: left;
  counter-reset: ec-step;
}
.ec-steps li {
  counter-increment: ec-step;
  position: relative;
  padding: 14px 0 14px 52px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
}
.ec-steps li:last-child { border-bottom: 0; }
.ec-steps li::before {
  content: counter(ec-step);
  position: absolute;
  left: 0;
  top: 12px;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--cream);
  color: var(--espresso);
  border: 1px solid var(--line);
  font-family: "Segoe UI", "PingFang SC", sans-serif;
  font-size: 0.85rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}
.ec-steps strong { color: var(--ink); }

.ec-foot {
  border-top: 1px solid var(--line);
  padding-top: 22px;
  text-align: center;
  font-size: 0.9rem;
  color: var(--muted);
  font-family: "Segoe UI", "PingFang SC", sans-serif;
}
.ec-foot a { color: var(--muted); }
.ec-foot nav { margin: 10px 0; }
.ec-foot nav a { margin: 0 10px; }

.ec-ab {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin: 0 0 8px;
  font-family: "Segoe UI", "PingFang SC", sans-serif;
  font-size: 0.78rem;
}
.ec-ab a {
  color: var(--muted);
  text-decoration: none;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid transparent;
}
.ec-ab a.is-on {
  color: var(--espresso);
  border-color: var(--line);
  background: var(--paper);
}

@media (max-width: 720px) {
  body.ec { font-size: 17px; }
  .ec-shell { padding: 0 18px 56px; }
  .ec-modes, .ec-facts { grid-template-columns: 1fr; }
  .ec-hero h1 { font-size: 2.15rem; }
  .ec-price { flex-direction: column; align-items: center; border-radius: 18px; gap: 2px; }
  .ec-price em { border-left: 0; padding-left: 0; }
}