/* ===== tokens（取自原页 CSS 变量） ===== */
:root {
  --orange: #F6893B;        /* 主橙（CTA、边框、见证区底） */
  --orange-deep: #FF5100;
  --navy: #172751;          /* 深蓝（暗按钮、标题） */
  --navy-dark: #222639;     /* FAQ 深底 */
  --ink: #2E2E2E;
  --gold: #C79A55;          /* 内容框边线 */
  --yellow: #FED943;
  --head: 'Fredoka', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --body: 'Fredoka', 'Lato', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: var(--body); color: var(--ink); background: #fff; line-height: 1.7; }
h1, h2, h3, h4 { font-family: var(--head); }
img, video { max-width: 100%; display: block; }

/* ===== 1. hero ===== */
.hero {
  background: linear-gradient(rgba(255,255,255,.22), rgba(255,255,255,.22)), url(bg-seminar.jpg?v=2) center/cover no-repeat;
  background-attachment: fixed, fixed;
  padding: 14px 16px 40px; text-align: center;
  border: 4px solid var(--orange);
}
.hero-logo { width: 200px; margin: -26px auto -30px; }
.headline-bar { background: rgba(255,255,255,.8); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); max-width: 1020px; margin: 0 auto 18px; padding: 4px 24px 10px; }
.headline-bar h1 { color: #E93D3D; font-size: 42px; font-weight: 800; line-height: 1.35; text-shadow: 4px 4px 0 #A9A9A9; letter-spacing: 1px; border-bottom: 2px solid var(--ink); padding-bottom: 4px; margin-bottom: 6px; }
.headline-bar p { font-size: 26px; font-weight: 700; color: var(--ink); font-family: var(--head); line-height: 1.55; }
.hero-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 26px; max-width: 1000px; margin: 0 auto; align-items: center; text-align: left; }
.video-card { position: relative; }
.sound-bar { display: block; width: 100%; background: var(--orange); color: #fff; border: 0; font: 700 17px var(--head); padding: 9px; cursor: pointer; }
.video-card video { width: 100%; aspect-ratio: 16/9; object-fit: cover; background: #000; }
.video-caption { background: rgba(255,255,255,.85); text-align: center; padding: 10px 14px; font-family: var(--head); font-size: 19px; font-weight: 700; line-height: 1.55; }
.video-caption .q1 { color: var(--orange); }
.video-caption .q2 { color: var(--ink); }
.offer-col { color: #fff; text-align: center; background: rgba(255,255,255,.12); backdrop-filter: blur(2px); -webkit-backdrop-filter: blur(2px); border-radius: 10px; padding: 18px 8px; align-self: center; width: 100%; }
.offer-card {
  background: linear-gradient(180deg, #FFAE4D, #F57C00);
  border: 3px solid #FFC24B; border-radius: 14px;
  box-shadow: 0 6px 18px rgba(0,0,0,.35);
  padding: 14px 18px; font-family: var(--head); font-weight: 800;
  display: flex; justify-content: space-between; gap: 10px; align-items: baseline;
}
.offer-label { font-size: 19px; }
.offer-price { font-size: 28px; letter-spacing: 1px; }
.offer-free { font-size: 26px; }
.offer-card s { text-decoration-thickness: 3px; }
.offer-urge { color: #FF5B5B; font-weight: 700; font-size: 17px; margin: 14px 0; }
.btn-signup { display: block; background: #E8382F; color: #fff; text-decoration: none; font: 700 22px var(--head); padding: 16px; border-radius: 8px; animation: btn-bounce 1.6s ease-in-out infinite; }
@keyframes btn-bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-16px); }
}
@media (prefers-reduced-motion: reduce) { .btn-signup, .btn-cta { animation: none; } }
.btn-signup:hover { filter: brightness(1.1); }

/* ===== CTA 通用 ===== */
.btn-cta { display: block; max-width: 1010px; margin: 34px auto 0; background: var(--orange); color: #fff; text-decoration: none; text-align: center; font: 700 26px var(--head); padding: 15px 24px; border-radius: 8px; box-shadow: 0 4px 14px rgba(0,0,0,.18); animation: btn-bounce 1.6s ease-in-out infinite; }
.btn-cta span { display: block; font: 400 14px var(--body); margin-top: 4px; }
.btn-cta:hover { filter: brightness(1.08); }
.btn-cta-dark { background: var(--navy); }

/* ===== 2. 痛点 ===== */
.pain { padding: 0 0 48px; text-align: center; }
.pain h2 { background: var(--orange); color: #fff; font-size: 22px; font-weight: 800; padding: 6px 16px; margin-bottom: 44px; }
.pain-list { list-style: none; text-align: left; max-width: 720px; margin: 0 auto 30px; padding: 0 16px; }
.pain-list li { margin: 0; }
.pain-list label { display: flex; gap: 12px; align-items: baseline; font-size: 16px; line-height: 1.65; color: #3A3A3A; padding: 8px 10px; border-radius: 6px; cursor: pointer; transition: background .15s; }
.pain-list label:hover { background: #FFF4EA; }
.pain-list input { transform: translateY(1px) scale(1.25); accent-color: var(--orange); flex: none; }
.pain-close { font-size: 19px; padding: 0 16px; line-height: 1.8; }

/* ===== 3. 你将学到 ===== */
.learn { padding: 0 16px 56px; }
.learn-box { max-width: 1200px; margin: 0 auto; border: 2px solid var(--orange); padding: 36px 28px; text-align: center; }
.learn-mockup { max-width: min(720px, 100%); margin: 0 auto 24px; }
.learn h2 { font-size: 30px; color: var(--navy); margin-bottom: 20px; }
.learn-list { text-align: left; max-width: 1000px; margin: 0 auto; font-size: 25px; line-height: 1.4; }
.learn-list li { margin: 26px 0; color: var(--ink); }

/* ===== 4. 见证 ===== */
.proof { background: var(--orange); padding: 56px 16px; text-align: center; color: #fff; }
.proof h2 { font-size: 33px; margin-bottom: 30px; }
.proof-sub { margin-bottom: 46px; font-size: 22px; font-weight: 700; font-style: italic; line-height: 2; }
.proof-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; max-width: 1180px; margin: 0 auto; }
.proof-card { background: #fff; color: var(--ink); border-radius: 10px; padding: 8px 8px 26px; }
.proof-card video { width: 100%; aspect-ratio: 16/9; object-fit: cover; background: #000; border-radius: 4px; }
.proof-card h3 { font-size: 20px; color: var(--navy); padding: 18px 12px 10px; line-height: 1.6; }
.proof-card p { font-size: 15px; padding: 0 14px; line-height: 1.85; }

/* ===== 5. 故事 ===== */
.story { padding: 56px 16px; }
.story-box { max-width: 1200px; margin: 0 auto; border: 1px solid #E5D8C8; border-top: 6px solid var(--orange); padding: 30px 40px 34px; display: grid; grid-template-columns: 1.7fr 1fr; gap: 24px; align-items: center; }
.story-title { grid-column: 1 / -1; font-size: 32px; color: #ED8936; text-align: center; margin: 8px 0 18px; }
.story-text p, .story-text ol { margin: 14px 0 14px 0; font-size: 16px; color: var(--navy); }
.story-text ol { padding-left: 22px; }

/* ===== 6. 为什么免费 ===== */
.why { padding: 0 16px 56px; }
.why-box { max-width: 1200px; margin: 0 auto; border: 1px solid #E5D8C8; border-top: 6px solid var(--orange); padding: 30px 40px 34px; }
.accent { color: #ED8936; font-weight: 700; }
.why h2 { font-size: 28px; color: var(--navy); text-align: center; margin-bottom: 20px; }
.why-box p { margin: 14px 0; color: var(--navy); }
.why-box ol { padding-left: 22px; margin: 14px 0; }
.why-box li { margin: 6px 0; color: var(--navy); }

/* ===== 7. FAQ ===== */
.faq { background: #ED8936; padding: 56px 16px 64px; }
.faq h2 { color: #fff; text-align: center; font-size: 38px; margin-bottom: 30px; }
.faq details { max-width: 840px; margin: 0 auto; border-bottom: 1px solid rgba(255,255,255,.12); background: #1F1F2E; }
.faq summary { list-style: none; cursor: pointer; color: #fff; font: 700 16px var(--head); padding: 16px 20px 16px 44px; position: relative; }
.faq summary::before { content: '▾'; position: absolute; left: 18px; transition: transform .2s; }
.faq details[open] summary::before { transform: rotate(-90deg); }
.faq summary::-webkit-details-marker { display: none; }
.faq-body { padding: 4px 20px 18px 44px; color: #C9D8E0; font-size: 15px; }
.faq-body p { margin: 8px 0; }

/* ===== 8. footer（对照原版：灰条 + 深黑区） ===== */
.footer { text-align: center; }
.footer-bar { background: #7D7D7D; padding: 26px 16px; }
.footer-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; max-width: 1180px; margin: 0 auto; }
.footer-grid h4 { color: #fff; font-size: 15px; font-weight: 700; margin-bottom: 3px; }
.footer-grid p { color: #F2F2F2; font-size: 13.5px; line-height: 1.5; }
.footer-grid a { color: #6FA8FF; text-decoration: underline; }
.footer-dark { background: #16161F; padding: 34px 16px 40px; }
.footer-logo { width: 150px; margin: 0 auto 20px; }
.footer-copy { color: #fff; font-size: 15px; margin-bottom: 26px; }
.footer-links { display: flex; justify-content: space-around; max-width: 1100px; margin: 0 auto; gap: 20px; flex-wrap: wrap; }
.footer-links a { color: #4B9BFF; font-size: 14px; font-weight: 700; text-decoration: underline; text-transform: uppercase; }

@media (max-width: 820px) {
  .hero {
    background:
      linear-gradient(rgba(40,38,36,0) 0, rgba(40,38,36,0) 130px, #2B2926 250px),
      url(bg-seminar.jpg?v=2) top center / 100% auto no-repeat,
      #2B2926;
  }
}

/* ===== 响应式 ===== */
@media (max-width: 820px) {
  .hero-grid, .story-box { grid-template-columns: 1fr; }
  .proof-grid { grid-template-columns: 1fr; max-width: 480px; }
  .footer-grid { grid-template-columns: 1fr; gap: 18px; }
  .footer a, .footer p { word-break: break-word; overflow-wrap: anywhere; }
  .footer-links { flex-direction: column; gap: 14px; }
  .headline-bar h1 { font-size: 26px; text-shadow: 2px 2px 0 #A9A9A9; }
  .headline-bar p { font-size: 17px; }
  .headline-bar { backdrop-filter: none; -webkit-backdrop-filter: none; background: rgba(255,255,255,.92); }
  .offer-col { background: rgba(255,255,255,.72); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); }
  .offer-urge { color: #E8382F; }
  .video-caption { font-size: 16px; }
  .pain-close { font-size: 16px; }
  .learn h2 { font-size: 24px; }
  .learn-list { font-size: 17px; padding-left: 24px; }
  .learn-box { padding: 24px 16px; }
  .proof h2 { font-size: 22px; }
  .proof-sub { font-size: 16px; line-height: 1.8; margin-bottom: 30px; }
  .story-title { font-size: 24px; order: 0; }
  .story-portrait { order: 1; max-width: 250px; margin: 0 auto 6px; }
  .story-text { order: 2; }
  .story-box, .why-box { padding: 22px 18px 26px; }
  .why h2 { font-size: 22px; }
  .faq h2 { font-size: 26px; }
  .btn-cta { font-size: 18px; }
}

/* ===== underline → 马克笔高亮 ===== */
.story-text u {
  text-decoration: none;
  background: linear-gradient(180deg, transparent 55%, rgba(255,196,75,.65) 55% 94%, transparent 94%);
  border-radius: 2px; padding: 0 1px;
}

/* ===== 手机底部常驻报名条（白玻璃底条 + 橙色按钮，同原版） ===== */
.sticky-bar { display: none; }
@media (max-width: 820px) {
  .sticky-bar {
    display: block; position: fixed; left: 0; right: 0; bottom: 0; z-index: 60;
    background: rgba(255,255,255,.72);
    backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
    padding: 10px 12px calc(26px + env(safe-area-inset-bottom));
    border-radius: 14px 14px 0 0;
    box-shadow: 0 -2px 14px rgba(0,0,0,.10);
  }
  .sticky-cta {
    display: block;
    background: linear-gradient(180deg, #FA9A4C, #F0761A);
    border-radius: 10px;
    color: #fff; text-decoration: none; text-align: center;
    font: 700 18px var(--head); padding: 14px 12px;
  }
  body { padding-bottom: 104px; }
}