:root {
  --navy-deep: #081231;      /* 主页面背景 */
  --navy: #0a1635;           /* 基础色 */
  --navy-2: #0d1a3c;         /* section alt 背景 */
  --card: #111f42;           /* 卡片纯深蓝底 */
  --card-2: #0e1a3b;         /* 略深卡片 */
  --line: rgba(255, 255, 255, .08);
  --ink: #eef2ff;
  --ink-2: #d5defa;
  --muted: #8e9ac0;
  --gold: #f5c26b;
  --gold-2: #e0973a;
  --cyan: #4ad6c4;
  --danger: #ff6b6b;
  --grad: linear-gradient(100deg, #ffd281, #f2b053 40%, #e09038 70%, #d87f2a);
  --grad-soft: linear-gradient(100deg, #f6cf87, #e5a146);
  --radius: 14px;
  --max: 1140px;
  font-synthesis-weight: none;
}

* { box-sizing: border-box }

html, body {
  scroll-behavior: smooth;
  overflow-x: hidden;
  width: 100%;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  padding-bottom: 84px;
  background: var(--navy-deep);
}

img { max-width: 100%; height: auto; display: block }
a { color: inherit; text-decoration: none }

.wrap {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
  box-sizing: border-box;
}

.icon {
  width: 22px;
  height: 22px;
  flex: 0 0 auto;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.icon-lg { width: 26px; height: 26px; stroke-width: 1.9; }

/* ===== Announce Bar ===== */
.announce {
  background: linear-gradient(90deg, #12203f, #1a2c57, #12203f);
  border-bottom: 1px solid var(--line);
  font-size: 11.5px;
  color: #cdd7f7;
}
.announce .wrap {
  display: flex; gap: 10px; align-items: center; justify-content: center;
  padding: 9px 24px; text-align: center;
}
.announce .icon { color: var(--gold); width: 16px; height: 16px; }

/* ===== Navigation ===== */
.nav {
  position: sticky; top: 0; z-index: 40;
  backdrop-filter: blur(16px);
  background: rgba(8, 18, 49, .88);
  border-bottom: 1px solid var(--line);
}
.nav .wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center; gap: 14px;
  padding: 14px 24px;
}
.brand { display: flex; align-items: center; gap: 10px; min-width: 0; }
.brand b {
  font-size: 15.5px; letter-spacing: .4px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  color: var(--ink);
}
.brand span {
  display: block; font-size: 10.5px; color: var(--muted); letter-spacing: .8px;
  text-transform: uppercase;
}
.nav-links { display: none; gap: 28px; align-items: center; }
.nav-links a {
  color: var(--muted); font-size: 14px; text-decoration: none;
  transition: color .15s; font-weight: 500;
}
.nav-links a:hover { color: var(--gold); }
@media(min-width: 768px){ .nav-links { display:flex; } }

/* ===== Buttons (CTA) ===== */
.cta {
  position: relative;
  display: inline-flex;
  align-items: center; justify-content: center;
  gap: 10px;
  background: var(--grad);
  color: #0e1730;
  font-weight: 800; font-size: 16px;
  border: 0; cursor: pointer;
  padding: 16px 32px;
  border-radius: 999px;
  box-shadow: 0 14px 38px rgba(242, 176, 83, .34);
  animation: breathe 2.4s ease-in-out infinite;
  transition: transform .2s, box-shadow .2s;
  letter-spacing: .2px;
}
.cta:hover {
  transform: translateY(-3px);
  box-shadow: 0 20px 50px rgba(242, 176, 83, .46);
}
.cta::after {
  content: ""; position: absolute; inset: 0;
  border-radius: 999px;
  border: 2px solid rgba(245, 194, 107, .6);
  animation: halo 2.4s ease-out infinite;
}
@keyframes breathe {
  0%, 100% { box-shadow: 0 10px 28px rgba(242, 176, 83, .28); transform: scale(1); }
  50% { box-shadow: 0 20px 48px rgba(255, 170, 80, .5); transform: scale(1.025); }
}
@keyframes halo {
  0% { opacity: .65; transform: scale(1); }
  100% { opacity: 0; transform: scale(1.12); }
}

.cta-center-wrap {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  width: 100%; margin: 22px 0 0;
}
.cta-note { text-align: center; font-size: 12px; color: var(--muted); margin-top: 10px; }
.cta-sub-copy { margin-top: 10px; text-align: center }

.btn-copy-link {
  background: transparent; border: 0; padding: 6px 12px; cursor: pointer;
  color: var(--muted); font-size: 13px; font-weight: 500;
  display: inline-flex; align-items: center; gap: 6px;
  border-radius: 8px; transition: color .2s, background .2s;
}
.btn-copy-link:hover {
  color: var(--gold); text-decoration: underline;
  background: rgba(245, 194, 107, .08);
}

/* ===== Typography ===== */
h1 {
  font-size: clamp(30px, 4.8vw, 48px);
  line-height: 1.12;
  margin: 14px 0 14px;
  letter-spacing: -.8px;
  font-weight: 800;
}
h1 em {
  font-style: normal;
  background: var(--grad-soft);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
h2 {
  font-size: clamp(25px, 3.1vw, 34px);
  line-height: 1.22;
  margin: 0 0 12px;
  letter-spacing: -.4px;
  font-weight: 800;
  color: #f2f5ff;
}
h3 {
  font-size: 17px;
  line-height: 1.35;
  font-weight: 700;
  color: var(--ink);
}
.lead {
  color: #cdd7f7;
  font-size: 16px;
  line-height: 1.68;
  margin: 0 0 22px;
  font-weight: 500;
}
.sub {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.68;
  max-width: 720px;
  margin: 0 auto;
}

/* ===== Sections ===== */
section { padding: 70px 0; }
.alt {
  background: var(--navy-2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
section:not(.hero) h2 { text-align: center; }
section:not(.hero) .sub { text-align: center; }

.eyebrow {
  color: var(--gold);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 3.2px;
  text-transform: uppercase;
  margin: 0 0 10px;
  display: inline-block;
}
section:not(.hero) .eyebrow { display: block; text-align: center; }

/* ===== Hero Section ===== */
.hero {
  position: relative;
  overflow: hidden;
  padding: 56px 0 60px;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(820px 460px at 15% 8%, rgba(245, 194, 107, .16), transparent 65%),
    radial-gradient(820px 480px at 85% 28%, rgba(74, 214, 196, .12), transparent 65%);
}
.hero-content-wrapper { position: relative; z-index: 1; }

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
  position: relative;
  z-index: 1;
  align-items: center;
}
@media(min-width: 900px){
  .hero-grid { grid-template-columns: 1.1fr .9fr; gap: 60px; }
}

/* Brand lockup (shield + text) */
.brand-lockup {
  display: inline-flex; align-items: center; gap: 12px;
  margin-bottom: 24px; padding-bottom: 18px;
  border-bottom: 1px solid rgba(245,194,107,0.22);
}
.brand-shield svg { width: 40px; height: 44px; display: block; }
.brand-text strong {
  display: block; font-size: 12.5px; letter-spacing: 2.2px;
  color: var(--gold); font-weight: 800;
}
.brand-text em {
  display: block; font-size: 10px; letter-spacing: 3.2px;
  color: #8a95ba; font-style: normal; margin-top: 3px;
  font-weight: 600;
}

.hero-ticks {
  list-style: none; padding: 0; margin: 0 0 26px;
  display: flex; gap: 18px 26px; flex-wrap: wrap;
}
.hero-ticks li {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 13.5px; color: #b6c0de; font-weight: 500;
}
.hero-ticks .icon { color: #78d897; flex-shrink: 0; width: 17px; height: 17px; stroke-width: 2.2; }

.hero-note {
  margin-top: 14px; font-size: 12px;
  color: #8a95ba; line-height: 1.55;
}
.hero-right { display: flex; justify-content: center; align-items: flex-start; }

/* ===== Product / Book Image ===== */
.hero-book-img {
  width: 100%; max-width: 440px;
  margin: 0 auto;
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 28px 70px rgba(0,0,0,0.55), 0 0 0 1px rgba(245,194,107,0.10);
  position: relative;
}
.hero-book-img::before {
  content: ""; position: absolute; inset: 0; z-index: 2;
  border-radius: 18px;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.05);
  pointer-events: none;
}
.hero-book-img img {
  width: 100%; display: block; height: auto;
  aspect-ratio: 4 / 3; object-fit: cover;
}

/* ===== Trust List ===== */
.trust {
  list-style: none; display: flex; flex-wrap: wrap;
  gap: 10px 20px; padding: 0; margin: 18px 0 0;
}
.trust li {
  display: flex; align-items: center; gap: 8px;
  font-size: 14px; color: #c4cfef; font-weight: 500;
}
.trust .icon { width: 18px; height: 18px; color: var(--cyan); }

/* ===== Gain Grid (6 cols) - 圆形深蓝底图标 ===== */
.gain-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 30px;
}
@media(min-width: 700px){ .gain-grid { grid-template-columns: repeat(3, 1fr); gap: 14px; } }
@media(min-width: 1000px){ .gain-grid { grid-template-columns: repeat(6, 1fr); gap: 12px; } }
.gain-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 26px 18px 22px;
  text-align: center;
  transition: border-color .2s, transform .2s, background .2s;
}
.gain-item:hover {
  border-color: rgba(245,194,107,0.32);
  transform: translateY(-3px);
  background: #14244a;
}
.gain-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 56px; height: 56px; border-radius: 50%;
  background: var(--navy-deep);
  color: var(--gold);
  margin-bottom: 14px;
  border: 1px solid rgba(245,194,107,0.14);
}
.gain-icon .icon { width: 24px; height: 24px; stroke-width: 1.9; }
.gain-item h3 { font-size: 13.5px; margin: 0 0 7px; font-weight: 700; }
.gain-item p { font-size: 12px; color: var(--muted); margin: 0; line-height: 1.55; }

/* ===== Why Learn With Us (Split) ===== */
.feature-split-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: center;
  margin-top: 30px;
}
@media(min-width: 900px){
  .feature-split-grid { grid-template-columns: 1fr 1fr; gap: 56px; }
}
.feature-text .eyebrow { text-align: left; display: inline-block; }
.feature-text h2 { text-align: left; }
.feature-text .sub { text-align: left; margin-left: 0; max-width: none; }

.tick-list { list-style: none; padding: 0; margin: 18px 0 0; }
.tick-list li {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 9px 0; font-size: 14.5px; color: #d0d8f7; font-weight: 500;
}
.tick-list .icon {
  flex-shrink: 0; color: var(--gold);
  width: 20px; height: 20px; margin-top: 2px; stroke-width: 2.2;
}

.why-learn-img {
  width: 100%; max-width: 540px; margin: 0 auto;
  border-radius: 16px; overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: 0 20px 52px rgba(0,0,0,0.45);
}
.why-learn-img img {
  width: 100%; display: block; height: auto;
  aspect-ratio: 4 / 3; object-fit: cover;
}

/* ===== Book Section ===== */
.book-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
  align-items: center;
  margin-top: 30px;
}
@media(min-width: 900px){
  .book-layout { grid-template-columns: .72fr 1.28fr; gap: 64px; }
}
.book-image-col { display: flex; justify-content: center; }
.book-text-col .eyebrow { text-align: left; display: inline-block; }
.book-text-col h2 { text-align: left; }
.book-text-col .sub { text-align: left; margin-left: 0; max-width: none; margin-top: 8px; }

/* Book benefits - 4图标横向，圆形深蓝底 */
.book-benefits {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin: 26px 0 30px;
}
@media(min-width: 600px){
  .book-benefits { grid-template-columns: repeat(4, 1fr); gap: 12px; }
}
.book-benefit {
  display: flex; flex-direction: column; align-items: center;
  gap: 10px; padding: 20px 12px 18px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  font-size: 12.5px; color: var(--muted);
  text-align: center; font-weight: 500;
  transition: border-color .2s, background .2s;
}
.book-benefit:hover {
  border-color: rgba(245,194,107,0.32);
  background: #14244a;
  color: #d0d8f7;
}
.book-benefit .icon {
  color: var(--gold);
  width: 44px; height: 44px;
  padding: 10px;
  border-radius: 50%;
  background: var(--navy-deep);
  box-sizing: border-box;
  border: 1px solid rgba(245,194,107,0.14);
}

/* ===== Courses Section ===== */
.courses-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
  align-items: start;
  margin-top: 30px;
}
@media(min-width: 900px){
  .courses-layout { grid-template-columns: 1fr 1fr; gap: 56px; }
}
.courses-left .eyebrow { text-align: left; display: inline-block; }
.courses-left h2 { text-align: left; }
.courses-left .sub { text-align: left; margin-left: 0; max-width: none; margin-top: 8px; }
.courses-lead {
  font-size: 15px; color: #d0d8f7;
  margin: 18px 0 26px; line-height: 1.68; font-weight: 500;
}

/* Curriculum grid - 6模块，圆形深蓝底数字 */
.curriculum-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  padding: 12px;
  background: var(--card-2);
  border-radius: 16px;
  border: 1px solid var(--line);
}
@media(min-width: 600px){
  .curriculum-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; padding: 14px; }
}
.curriculum-grid .curriculum-item {
  display: flex; align-items: center; gap: 13px;
  padding: 16px 16px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  transition: border-color .2s, background .2s, transform .2s;
}
.curriculum-grid .curriculum-item:hover {
  border-color: rgba(245,194,107,0.36);
  background: #14244a;
  transform: translateX(3px);
}
.curriculum-grid .cur-num {
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  background: var(--navy-deep);
  color: var(--gold);
  border-radius: 50%;
  font-size: 13px; font-weight: 800;
  flex-shrink: 0;
  border: 1px solid rgba(245,194,107,0.14);
}
.curriculum-grid .curriculum-item h3 {
  font-size: 14px; margin: 0; font-weight: 600;
}

/* ===== Environment Grid (4 cols) - 圆形深蓝底小图标 ===== */
.env-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 30px;
}
@media(min-width: 600px){ .env-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; } }
@media(min-width: 1000px){ .env-grid { grid-template-columns: repeat(4, 1fr); gap: 12px; } }
.env-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 24px 20px;
  text-align: left;
  transition: border-color .2s, transform .2s, background .2s;
}
.env-card:hover {
  border-color: rgba(245,194,107,0.32);
  transform: translateY(-3px);
  background: #14244a;
}
.env-card > .icon {
  color: var(--gold);
  width: 44px; height: 44px;
  padding: 10px;
  border-radius: 50%;
  background: var(--navy-deep);
  box-sizing: border-box;
  border: 1px solid rgba(245,194,107,0.14);
  margin-bottom: 14px;
  stroke-width: 1.9;
}
.env-card h3 { font-size: 15px; margin: 0 0 7px; font-weight: 700; }
.env-card p { font-size: 13px; color: var(--muted); margin: 0; line-height: 1.6; }

/* ===== Reviews Section ===== */
.reviews {
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
  margin-top: 30px;
}
@media(min-width: 700px){ .reviews { grid-template-columns: repeat(2, 1fr); gap: 16px; } }
.review {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 26px 22px;
  transition: border-color .2s, transform .2s;
}
.review:hover {
  border-color: rgba(245,194,107,0.28);
  transform: translateY(-2px);
}
.stars {
  display: flex; gap: 3px; color: var(--gold); margin-bottom: 14px;
}
.stars .icon { width: 17px; height: 17px; fill: currentColor; stroke: none; }
.review p {
  color: #dfe6ff; font-size: 15px;
  font-style: italic; line-height: 1.68; margin: 0 0 14px;
}
.review b { display: block; font-size: 14px; color: var(--ink); font-weight: 700; }
.review span { font-size: 12.5px; color: var(--muted); }

.review-note {
  margin-top: 24px; padding: 15px 20px;
  background: rgba(245,194,107,0.06);
  border: 1px solid rgba(245,194,107,0.14);
  border-radius: 12px;
  font-size: 12.5px; color: #b6c0de; text-align: center; line-height: 1.6;
}

/* ===== FAQ - 白色卡片背景！ ===== */
details {
  background: #ffffff;
  border: 1px solid rgba(18, 31, 66, .10);
  border-radius: 14px;
  padding: 0 24px;
  margin: 0 auto 12px;
  max-width: 860px;
  transition: border-color .2s, box-shadow .2s;
  box-shadow: 0 1px 2px rgba(0,0,0,0.04);
}
details[open], details:hover {
  border-color: rgba(245,194,107,0.5);
  box-shadow: 0 4px 18px rgba(245,194,107,0.10);
}
summary {
  cursor: pointer; list-style: none;
  padding: 20px 0;
  font-weight: 700; font-size: 15.5px;
  display: flex; justify-content: space-between; gap: 16px; align-items: center;
  color: #0f1a38;
}
summary::-webkit-details-marker { display: none }
summary .icon {
  color: var(--gold-2); transition: .25s;
  width: 20px; height: 20px; stroke-width: 2.2;
}
details[open] summary .icon { transform: rotate(45deg) }
details p {
  margin: 0 0 20px;
  color: #4a5573; font-size: 14.5px; line-height: 1.7;
  font-weight: 500;
}

/* ===== Final CTA ===== */
.final {
  text-align: center;
  background:
    radial-gradient(900px 420px at 50% 0%, rgba(245, 194, 107, .20), transparent 70%),
    var(--navy-deep);
  position: relative;
}
.final::before {
  content: "";
  position: absolute; left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  width: 120%; height: 120%;
  background-image:
    linear-gradient(rgba(245,194,107,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(245,194,107,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  pointer-events: none;
}
.final .wrap { position: relative; z-index: 1; }
.final h2 { margin-bottom: 12px; }
.final .sub { margin-inline: auto; }

.disclosure {
  margin-top: 46px;
  font-size: 12.5px;
  color: #7f8bb0;
  border-top: 1px solid var(--line);
  padding-top: 26px;
  max-width: 960px;
  margin-inline: auto;
  line-height: 1.68;
}

/* ===== Footer ===== */
footer { padding: 26px 0 8px; border-top: 1px solid var(--line); }
.footer-links {
  display: flex; flex-wrap: wrap; justify-content: center;
  gap: 8px 16px; margin-bottom: 14px; font-size: 13px;
}
.footer-link-btn {
  background: none; border: none;
  color: var(--gold); cursor: pointer;
  font-size: 13px; text-decoration: underline;
  text-decoration-color: rgba(245,194,107,0.35);
  text-underline-offset: 3px;
  padding: 0; transition: color .2s;
}
.footer-link-btn:hover { color: #fff; }
.footer-copy { color: #7f8bb0; font-size: 12.5px; text-align: center; }

/* ===== Mobile Sticky Bar ===== */
.mobilebar {
  position: fixed; inset-inline: 0; bottom: 0; z-index: 60;
  padding: 10px 16px max(14px, calc(33px + env(safe-area-inset-bottom)));
  background: rgba(8, 18, 49, .97);
  backdrop-filter: blur(16px);
  border-top: 1px solid var(--line);
  box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.5);
  display: none;
}
.mobilebar .cta {
  width: 100%; font-size: 15.5px; padding: 14px 20px;
}
.mobilebar .cta-sub-copy {
  margin-top: 8px; text-align: center;
  display: flex; justify-content: center;
}
.mobilebar .btn-copy-link {
  font-size: 12px; font-weight: 600;
  color: var(--gold);
  background: rgba(245, 194, 107, .12);
  border: 1px solid rgba(245, 194, 107, .32);
  padding: 5px 14px; border-radius: 999px;
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, .2);
  transition: all .2s ease;
}
.mobilebar .btn-copy-link:hover,
.mobilebar .btn-copy-link:active {
  background: rgba(245, 194, 107, .24);
  color: #fff; border-color: var(--gold);
}

/* ===== Policy Modal ===== */
.policy-modal-overlay {
  position: fixed; inset: 0; z-index: 10000;
  background: rgba(4, 8, 20, 0.88);
  backdrop-filter: blur(10px);
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
  opacity: 0; visibility: hidden;
  transition: opacity .25s ease, visibility .25s;
}
.policy-modal-overlay.open { opacity: 1; visibility: visible; }
.policy-modal-card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 18px; max-width: 680px; width: 100%;
  max-height: 85vh; display: flex; flex-direction: column; overflow: hidden;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.7);
  color: var(--ink);
}
.policy-modal-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 18px 24px; border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, .025);
}
.policy-modal-header h3 { margin: 0; font-size: 17px; color: var(--gold); }
.policy-close-btn {
  background: none; border: none; color: var(--muted);
  font-size: 26px; cursor: pointer; line-height: 1;
}
.policy-close-btn:hover { color: #fff; }
.policy-modal-body {
  padding: 22px 26px; overflow-y: auto;
  font-size: 14px; line-height: 1.7; color: #cdd7f7;
}
.policy-modal-body h4 {
  color: var(--gold); margin: 18px 0 8px; font-size: 15.5px;
}
.policy-modal-body p { margin: 0 0 10px; }
.policy-modal-body ul { margin: 0 0 10px; padding-inline-start: 22px; }

/* ===== FB In-App Browser Overlay ===== */
.fb-modal-overlay {
  position: fixed; inset: 0; z-index: 9999;
  background: rgba(4, 8, 20, 0.88);
  backdrop-filter: blur(10px);
  display: flex; flex-direction: column; align-items: flex-end;
  padding: 16px 20px;
  opacity: 0; visibility: hidden;
  transition: opacity .25s ease, visibility .25s;
}
.fb-modal-overlay.open { opacity: 1; visibility: visible; }
.fb-arrow-pointer {
  display: flex; align-items: center; gap: 8px;
  color: var(--gold); font-weight: 700; font-size: 14px;
  margin-bottom: 12px;
  animation: bounceArrow 1.2s infinite ease-in-out;
}
@keyframes bounceArrow {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}
.fb-modal-card {
  background: var(--card); border: 1px solid var(--gold-2);
  border-radius: 18px; padding: 24px;
  max-width: 360px; width: 100%;
  color: var(--ink);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
  text-align: start; margin-top: 10px; align-self: center;
}
.fb-modal-card h3 {
  margin: 0 0 10px; font-size: 17px; color: var(--gold);
  display: flex; align-items: center; gap: 8px;
}
.fb-modal-card p {
  margin: 0 0 16px; font-size: 13.5px; color: var(--muted); line-height: 1.55;
}
.fb-modal-card .btn-copy {
  width: 100%; padding: 12px 16px; border-radius: 999px;
  background: rgba(245, 194, 107, 0.14);
  border: 1px solid var(--gold);
  color: var(--gold); font-weight: 700; font-size: 13.5px;
  cursor: pointer; display: flex; align-items: center; justify-content: center; gap: 8px;
  margin-bottom: 10px; transition: background .2s;
}
.fb-modal-card .btn-copy:hover { background: rgba(245, 194, 107, 0.28); }
.fb-modal-card .btn-close {
  width: 100%; padding: 10px; background: transparent;
  border: 0; color: var(--muted); font-size: 13px;
  cursor: pointer; text-decoration: underline;
}

/* ===== Toast ===== */
.toast-msg {
  position: fixed; bottom: 140px; left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: #12203f; border: 1px solid var(--cyan);
  color: #fff; padding: 11px 20px; border-radius: 999px;
  font-size: 13.5px; font-weight: 600;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  z-index: 10000;
  opacity: 0; pointer-events: none;
  transition: all .3s ease;
}
.toast-msg.show {
  opacity: 1; transform: translateX(-50%) translateY(0); pointer-events: auto;
}

/* ===== K-line Background Animation ===== */
.kline-bg {
  position: absolute; top: 0; left: 0;
  width: 100%; height: 55%;
  overflow: hidden; opacity: 0.9;
  z-index: 0; pointer-events: none;
  mix-blend-mode: screen;
}
.kline-bg::before {
  content: ""; position: absolute; inset: 0 0 auto 0;
  height: 30%;
  background: linear-gradient(180deg, var(--navy-deep) 0%, rgba(13, 22, 48, 0) 100%);
  z-index: 2; pointer-events: none;
}
.kline-bg::after {
  content: ""; position: absolute; inset: auto 0 0 0;
  height: 60%;
  background: linear-gradient(0deg, var(--navy-deep) 85%, rgba(13, 22, 48, 0) 100%);
  z-index: 2; pointer-events: none;
}
.kline-svg { width: 100%; height: 100%; display: block; }

.kline-track { animation: klineScroll 30s linear infinite; }
@keyframes klineScroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-1600px); }
}
.kline-trend-far {
  stroke-dasharray: 300 120;
  animation: klineFarFlow 18s linear infinite;
}
@keyframes klineFarFlow {
  0% { stroke-dashoffset: 0; }
  100% { stroke-dashoffset: 420; }
}
.kline-ma-glow {
  animation: klineMaFlow 4s linear infinite;
  filter: drop-shadow(0 0 6px rgba(255, 217, 138, 0.55));
}
@keyframes klineMaFlow {
  0% { stroke-dashoffset: 0; }
  100% { stroke-dashoffset: -240; }
}

@media (prefers-reduced-motion: reduce) {
  .kline-track, .kline-trend-far, .kline-ma-glow { animation: none; }
}
@media (max-width: 768px) {
  .kline-bg { opacity: 0.75; }
  .kline-track { animation-duration: 55s; }
  .kline-trend-far { animation-duration: 30s; }
  .kline-ma-glow { animation-duration: 6s; }
}

/* ===== Responsive (Mobile) ===== */
@media (max-width: 899px) {
  .wrap { padding: 0 18px; }
  .hero { padding: 38px 0 42px; }
  section { padding: 52px 0; }
  .mobilebar { display: block; }
  body { padding-bottom: 170px; }
  .toast-msg { max-width: 88vw; bottom: 150px; }

  .feature-split-grid { gap: 22px; }
  .feature-text .eyebrow,
  .feature-text h2,
  .feature-text .sub { text-align: center; }
  .tick-list { max-width: 480px; margin-left: auto; margin-right: auto; }

  .book-layout { gap: 26px; }
  .book-text-col .eyebrow,
  .book-text-col h2,
  .book-text-col .sub { text-align: center; }
  .book-text-col { text-align: center; }
  .book-benefits { margin-left: auto; margin-right: auto; }

  .courses-layout { gap: 26px; }
  .courses-left .eyebrow,
  .courses-left h2,
  .courses-left .sub,
  .courses-left .courses-lead { text-align: center; margin-left: auto; margin-right: auto; }
  .courses-left { text-align: center; }

  .env-card { padding: 22px 18px; }
  .review { padding: 22px 20px; }
  .gain-item { padding: 22px 16px 20px; }
  .gain-icon { width: 52px; height: 52px; }
  .gain-icon .icon { width: 22px; height: 22px; }

  details { padding: 0 20px; }
  summary { font-size: 14.5px; padding: 18px 0; }
  details p { font-size: 13.5px; }

  h1 { font-size: clamp(28px, 7.2vw, 38px); }
  h2 { font-size: clamp(23px, 6vw, 29px); }
}