/* ============ AI漫剧造星计划 · 站点样式 ============ */
:root {
  --bg: #0a0c12;
  --bg2: #0e1119;
  --bg3: #131826;
  --card: rgba(255, 255, 255, .045);
  --card-hover: rgba(255, 255, 255, .08);
  --line: rgba(255, 255, 255, .09);
  --text: #f4f6fb;
  --muted: #9aa4b8;
  --orange: #ff7a1a;
  --red: #ff3d54;
  --gold: #ffc24b;
  --grad: linear-gradient(96deg, #ff7a1a, #ff3d54);
  --radius: 18px;
  --shadow: 0 20px 60px rgba(0, 0, 0, .45);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
sup { color: var(--muted); font-size: .6em; }

.container { width: min(1180px, 92%); margin: 0 auto; }
.container-narrow { width: min(860px, 92%); }

/* ---------- 通用 ---------- */
.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  border-radius: 999px; font-weight: 700; cursor: pointer; border: none;
  transition: transform .25s, box-shadow .25s, background .25s;
  white-space: nowrap;
}
.btn-primary {
  background: var(--grad); color: #fff;
  padding: 14px 34px; font-size: 17px;
  box-shadow: 0 10px 34px rgba(255, 90, 30, .38);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 16px 44px rgba(255, 90, 30, .5); }
.btn-ghost {
  background: rgba(255, 255, 255, .06); color: var(--text);
  padding: 14px 34px; font-size: 17px;
  border: 1px solid var(--line); backdrop-filter: blur(6px);
}
.btn-ghost:hover { background: rgba(255, 255, 255, .12); transform: translateY(-3px); }
.btn-lg { padding: 16px 40px; font-size: 18px; }
.btn-sm { padding: 9px 22px; font-size: 14px; }
.btn-block { width: 100%; }

.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 28px;
  transition: transform .3s, background .3s, border-color .3s;
}
.card:hover { background: var(--card-hover); transform: translateY(-4px); }

.chip-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.chip-row.center { justify-content: center; }
.chip {
  padding: 7px 16px; border-radius: 999px; font-size: 14px;
  background: rgba(255, 122, 26, .1); border: 1px solid rgba(255, 122, 26, .35);
  color: #ffb37a;
}
.src-note { font-size: 12.5px; color: var(--muted); margin-top: 16px; line-height: 1.6; }
.src-note.center { text-align: center; }

/* ---------- 导航 ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  transition: background .3s, box-shadow .3s, backdrop-filter .3s;
}
.nav.scrolled {
  background: rgba(10, 12, 18, .82);
  backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 var(--line);
}
.nav-inner {
  width: min(1180px, 94%); margin: 0 auto;
  display: flex; align-items: center; gap: 26px; padding: 14px 0;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-logo {
  height: 42px; width: auto; flex: none;
  filter: drop-shadow(0 4px 14px rgba(255, 122, 26, .25));
}
.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-text strong { font-size: 17px; letter-spacing: .5px; }
.brand-text em { font-style: normal; font-size: 11.5px; color: var(--gold); letter-spacing: 2px; }
.nav-links { display: flex; gap: 4px; margin-left: auto; }
.nav-links a {
  padding: 8px 14px; font-size: 14.5px; color: var(--muted);
  border-radius: 8px; transition: color .2s, background .2s;
}
.nav-links a:hover { color: var(--text); background: rgba(255, 255, 255, .06); }
.nav-toggle {
  display: none; background: none; border: 1px solid var(--line);
  color: var(--text); font-size: 20px; border-radius: 10px;
  width: 42px; height: 42px; cursor: pointer; margin-left: auto;
}

/* ---------- Hero ---------- */
.hero { position: relative; min-height: 100vh; display: flex; flex-direction: column; justify-content: center; overflow: hidden; }
/* Ken Burns 动态背景（山海经深海玄武） */
.hero-slides { position: absolute; inset: 0; z-index: -2; overflow: hidden; background: #06080d; }
.hero-slides i {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  opacity: 0; transform: scale(1.12);
  animation: kenburns 80s linear infinite;
  will-change: opacity, transform;
}
.hero-slides i:nth-child(2) { animation-delay: 20s; }
.hero-slides i:nth-child(3) { animation-delay: 40s; }
.hero-slides i:nth-child(4) { animation-delay: 60s; }
@keyframes kenburns {
  0%   { opacity: 0; transform: scale(1.12) translate(0, 0); }
  3%   { opacity: 1; }
  22%  { opacity: 1; }
  27%  { opacity: 0; transform: scale(1.24) translate(-1.5%, -1%); }
  100% { opacity: 0; transform: scale(1.24) translate(-1.5%, -1%); }
}
@media (prefers-reduced-motion: reduce) {
  .hero-slides i { animation: none; }
  .hero-slides i:first-child { opacity: 1; }
}
.hero-mask {
  position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(75% 60% at 72% 32%, rgba(10, 12, 18, .35), transparent 62%),
    linear-gradient(180deg, rgba(10, 12, 18, .86) 0%, rgba(10, 12, 18, .72) 45%, var(--bg) 96%);
}
.hero-inner {
  padding: 130px 0 40px;
  display: grid; grid-template-columns: 1.15fr .85fr; gap: 40px;
  align-items: center; text-align: left;
}
.hero-copy { display: flex; flex-direction: column; align-items: flex-start; }
.hero-poster {
  justify-self: center; position: relative;
  max-width: 400px; width: 100%;
  border-radius: 22px; overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .14);
  box-shadow: 0 34px 90px rgba(0, 0, 0, .6), 0 0 70px rgba(255, 100, 30, .14);
  animation: floaty 6s ease-in-out infinite;
}
.hero-poster img { width: 100%; display: block; }
@keyframes floaty {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}
.hero-poster::after {
  content: ""; position: absolute; inset: 0; border-radius: 22px;
  background: linear-gradient(200deg, transparent 55%, rgba(255, 122, 26, .12));
  pointer-events: none;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 9px 22px; border-radius: 999px; font-size: 14px; letter-spacing: 1px;
  background: rgba(255, 194, 75, .1); border: 1px solid rgba(255, 194, 75, .4);
  color: var(--gold); margin-bottom: 26px;
}
.hero-badge .dot {
  width: 8px; height: 8px; border-radius: 50%; background: var(--gold);
  animation: pulse 1.6s infinite;
}
@keyframes pulse { 0%,100% { box-shadow: 0 0 0 0 rgba(255, 194, 75, .5); } 50% { box-shadow: 0 0 0 8px rgba(255, 194, 75, 0); } }
.hero-title {
  font-size: clamp(40px, 6.5vw, 76px); font-weight: 900; line-height: 1.18;
  letter-spacing: 1px; margin-bottom: 22px;
  text-shadow: 0 4px 40px rgba(0, 0, 0, .6);
}
.hero-sub {
  font-size: clamp(15px, 1.6vw, 18px); color: #cfd6e4; max-width: 640px;
  margin: 0 0 30px;
}
.hero-sub b { color: var(--gold); }
.hero-actions { display: flex; gap: 16px; justify-content: flex-start; flex-wrap: wrap; margin-bottom: 30px; }
.hero-seats { max-width: 460px; width: 100%; margin: 0; }
.seats-info { display: flex; justify-content: space-between; font-size: 14px; color: var(--muted); margin-bottom: 8px; }
.seats-info b { color: var(--gold); font-size: 16px; }
.seats-info i { font-style: normal; color: var(--text); font-weight: 700; }
.seats-bar {
  height: 10px; border-radius: 999px; background: rgba(255, 255, 255, .08);
  overflow: hidden; border: 1px solid var(--line);
}
.seats-bar i {
  display: block; height: 100%; border-radius: 999px;
  background: var(--grad); width: 0; transition: width 1.6s cubic-bezier(.2, .7, .2, 1);
}
.hero-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px;
  border-top: 1px solid var(--line); padding-top: 30px;
}
.stat b { display: block; font-size: clamp(26px, 3.4vw, 40px); font-weight: 900; }
.stat b i { font-style: normal; }
.stat span { font-size: 13.5px; color: var(--muted); }

/* 跑马灯 */
.marquee-wrap {
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  background: rgba(0, 0, 0, .35); overflow: hidden; padding: 14px 0;
}
.marquee {
  display: flex; gap: 56px; white-space: nowrap; width: max-content;
  animation: scroll 34s linear infinite;
}
.marquee span {
  font-size: 15px; font-weight: 700; letter-spacing: 2px; color: rgba(255, 255, 255, .4);
  display: inline-flex; align-items: center; gap: 56px;
}
.marquee span::after { content: "·"; color: var(--orange); font-size: 22px; }
@keyframes scroll { to { transform: translateX(-50%); } }

/* ---------- Section 通用 ---------- */
.section { padding: 100px 0; position: relative; }
.section-alt { background: var(--bg2); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.sec-head { text-align: center; max-width: 760px; margin: 0 auto 56px; }
.sec-tag {
  display: inline-block; font-size: 12.5px; letter-spacing: 3px; font-weight: 700;
  color: var(--orange); padding: 6px 16px; border-radius: 999px;
  border: 1px solid rgba(255, 122, 26, .35); background: rgba(255, 122, 26, .08);
  margin-bottom: 18px;
}
.sec-head h2 { font-size: clamp(28px, 3.8vw, 42px); font-weight: 900; line-height: 1.3; margin-bottom: 14px; }
.sec-head p { color: var(--muted); font-size: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }

/* ---------- 风口 ---------- */
.why-card h3 { font-size: 20px; margin: 14px 0 10px; }
.why-card p { color: var(--muted); font-size: 14.5px; }
.why-card p b { color: var(--gold); }
.why-icon {
  width: 54px; height: 54px; border-radius: 14px; font-size: 26px;
  display: grid; place-items: center;
  background: rgba(255, 122, 26, .12); border: 1px solid rgba(255, 122, 26, .3);
}

/* ---------- 平台 ---------- */
.platform-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 40px; align-items: center; }
.platform-desc { color: #cfd6e4; font-size: 15.5px; margin-bottom: 26px; }
.platform-desc b { color: var(--gold); }
.platform-stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.pstat {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  padding: 18px 20px; transition: background .3s;
}
.pstat:hover { background: var(--card-hover); }
.pstat b { display: block; font-size: 24px; font-weight: 900; }
.pstat b, .pstat span { background: none; }
.pstat span { font-size: 13px; color: var(--muted); }
.platform-right { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; align-items: start; }
.shot {
  border-radius: 16px; overflow: hidden; border: 1px solid var(--line);
  background: #000; box-shadow: var(--shadow); transition: transform .3s;
}
.shot:hover { transform: translateY(-4px); }
.shot img { width: 100%; }
.shot figcaption {
  padding: 10px 16px; font-size: 13px; color: var(--muted);
  background: var(--bg3); border-top: 1px solid var(--line);
}

/* ---------- 收益 ---------- */
.income-top { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-bottom: 26px; }
.itop-card {
  border-radius: var(--radius); padding: 26px; position: relative; overflow: hidden;
  background: var(--card); border: 1px solid var(--line); transition: transform .3s;
  display: flex; flex-direction: column;
}
.itop-card:hover { transform: translateY(-4px); }
.itop-card.first {
  background: linear-gradient(150deg, rgba(255, 122, 26, .16), rgba(255, 61, 84, .1));
  border-color: rgba(255, 122, 26, .45);
}
.itop-card .rank {
  display: inline-block; font-size: 12px; font-weight: 800; letter-spacing: 1px;
  padding: 4px 12px; border-radius: 999px; margin-bottom: 12px;
  background: rgba(255, 61, 84, .18); color: #ff8296; border: 1px solid rgba(255, 61, 84, .4);
}
.itop-card h4 { font-size: 15px; color: #cfd6e4; min-height: 46px; margin-bottom: 6px; }
.itop-card .heat { font-size: 13px; color: var(--muted); margin-bottom: 12px; }
.itop-card .money { font-size: clamp(24px, 2.6vw, 32px); font-weight: 900; margin-top: auto; white-space: nowrap; }
.itop-card .money i {
  display: block; font-style: normal; font-size: 15px; font-weight: 700;
  color: var(--gold); margin-top: 8px; white-space: nowrap;
}
.itop-card .formula { display: block; margin-top: 10px; font-size: 12.5px; color: var(--gold); }
.income-table { padding: 10px 0; overflow-x: auto; }
.income-table table { width: 100%; border-collapse: collapse; min-width: 720px; }
.income-table th, .income-table td {
  padding: 12px 18px; text-align: left; font-size: 14px;
  border-bottom: 1px solid var(--line);
}
.income-table th {
  color: var(--gold); font-size: 13px; letter-spacing: 1px;
  background: rgba(255, 122, 26, .06);
}
.income-table td { color: #cfd6e4; }
.income-table td.hot { color: var(--gold); font-weight: 800; }
.income-table .total-row td { background: rgba(255, 122, 26, .07); font-weight: 700; color: var(--text); }

/* ---------- 课程 ---------- */
.course-flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 40px; }
.cnode {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  padding: 20px; position: relative; transition: transform .3s, border-color .3s, background .3s;
}
.cnode:hover { transform: translateY(-4px); border-color: rgba(255, 122, 26, .5); background: var(--card-hover); }
.cnode i {
  font-style: normal; font-size: 13px; font-weight: 900; color: var(--orange);
  font-family: Consolas, monospace; letter-spacing: 1px;
}
.cnode b { display: block; font-size: 17px; margin: 6px 0 6px; }
.cnode span { font-size: 13px; color: var(--muted); line-height: 1.6; display: block; }
.course-feats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-bottom: 30px; }
.course-feats b { font-size: 26px; }
.course-feats h4 { font-size: 17px; margin: 10px 0 8px; }
.course-feats p { font-size: 14px; color: var(--muted); }

/* ---------- 作品 ---------- */
.works-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.work {
  border-radius: var(--radius); overflow: hidden; cursor: pointer;
  border: 1px solid var(--line); background: var(--card);
  transition: transform .3s, box-shadow .3s, border-color .3s;
}
.work:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: rgba(255, 122, 26, .45); }
.work-poster { position: relative; aspect-ratio: 3/4; background: #000; }
.work-poster img { width: 100%; height: 100%; object-fit: cover; }
.play {
  position: absolute; inset: 0; margin: auto; width: 62px; height: 62px;
  border-radius: 50%; background: rgba(255, 122, 26, .9);
  display: grid; place-items: center; font-size: 22px; color: #fff;
  transition: transform .3s, background .3s; text-align: center; line-height: 62px;
  box-shadow: 0 8px 30px rgba(255, 90, 30, .5);
}
.work:hover .play { transform: scale(1.14); background: var(--orange); }
.work-info { padding: 14px 16px; display: flex; flex-direction: column; gap: 3px; }
.work-info b { font-size: 15.5px; }
.work-info span { font-size: 12.5px; color: var(--muted); }

/* ---------- 路径 ---------- */
.path-flow { display: grid; grid-template-columns: repeat(6, 1fr); gap: 14px; }
.pstep {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  padding: 22px 16px; text-align: center; position: relative;
  transition: transform .3s, background .3s;
}
.pstep:hover { transform: translateY(-4px); background: var(--card-hover); }
.pstep.highlight { background: linear-gradient(160deg, rgba(255, 122, 26, .18), rgba(255, 61, 84, .1)); border-color: rgba(255, 122, 26, .5); }
.pstep i {
  font-style: normal; display: grid; place-items: center; margin: 0 auto 12px;
  width: 40px; height: 40px; border-radius: 50%; font-weight: 900;
  background: rgba(255, 122, 26, .15); color: var(--orange); border: 1px solid rgba(255, 122, 26, .4);
}
.pstep.highlight i { background: var(--grad); color: #fff; border: none; }
.pstep b { display: block; font-size: 16px; margin-bottom: 6px; }
.pstep span { font-size: 12.5px; color: var(--muted); line-height: 1.55; display: block; }

/* ---------- 人群 ---------- */
.who-card { text-align: center; }
.who-card .who-icon {
  width: 58px; height: 58px; margin: 0 auto 14px; border-radius: 16px;
  font-size: 28px; display: grid; place-items: center;
  background: rgba(255, 122, 26, .12); border: 1px solid rgba(255, 122, 26, .3);
}
.who-card h3 { font-size: 18px; margin-bottom: 8px; }
.who-card p { font-size: 14px; color: var(--muted); }

/* ---------- FAQ ---------- */
.faq-list { display: flex; flex-direction: column; gap: 14px; }
.faq-item {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  overflow: hidden; transition: border-color .3s;
}
.faq-item.open { border-color: rgba(255, 122, 26, .45); }
.faq-q {
  width: 100%; background: none; border: none; color: var(--text);
  font-size: 16.5px; font-weight: 700; text-align: left; cursor: pointer;
  padding: 20px 24px; display: flex; justify-content: space-between; align-items: center; gap: 14px;
  font-family: inherit;
}
.faq-arrow { color: var(--orange); transition: transform .3s; flex: none; }
.faq-item.open .faq-arrow { transform: rotate(180deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .4s ease; }
.faq-a p { padding: 0 24px 22px; color: var(--muted); font-size: 15px; }
.faq-a b { color: var(--gold); }

/* ---------- 报名 ---------- */
.enroll {
  background:
    radial-gradient(60% 80% at 15% 20%, rgba(255, 122, 26, .1), transparent 60%),
    radial-gradient(50% 70% at 90% 90%, rgba(255, 61, 84, .08), transparent 60%),
    var(--bg2);
  border-top: 1px solid var(--line);
}
.enroll-grid { display: grid; grid-template-columns: 1fr 1.05fr; gap: 50px; align-items: center; }
.enroll-left h2 { font-size: clamp(30px, 4vw, 46px); font-weight: 900; margin: 14px 0 24px; }
.enroll-list { list-style: none; display: flex; flex-direction: column; gap: 12px; margin-bottom: 26px; }
.enroll-list li { font-size: 15.5px; color: #cfd6e4; }
.enroll-note {
  background: rgba(255, 194, 75, .07); border: 1px solid rgba(255, 194, 75, .3);
  border-radius: 12px; padding: 14px 18px; font-size: 14px; color: var(--muted);
}
.enroll-note b { color: var(--gold); }
.enroll-form-card { padding: 34px; }
.frow { margin-bottom: 18px; }
.frow label { display: block; font-size: 14px; font-weight: 700; margin-bottom: 8px; }
.frow label i { color: var(--red); font-style: normal; }
.frow input, .frow select {
  width: 100%; padding: 13px 16px; border-radius: 12px;
  background: rgba(0, 0, 0, .3); border: 1px solid var(--line);
  color: var(--text); font-size: 15px; font-family: inherit;
  transition: border-color .25s, box-shadow .25s;
}
.frow input:focus, .frow select:focus {
  outline: none; border-color: var(--orange);
  box-shadow: 0 0 0 3px rgba(255, 122, 26, .18);
}
.frow input::placeholder { color: #5d6678; }
.frow select option { background: var(--bg3); color: var(--text); }
.radio-row { display: flex; gap: 10px; flex-wrap: wrap; }
.radio { position: relative; flex: 1; }
.radio input { position: absolute; opacity: 0; }
.radio span {
  display: block; text-align: center; padding: 11px 8px; border-radius: 12px;
  border: 1px solid var(--line); font-size: 14px; cursor: pointer;
  color: var(--muted); transition: all .25s; background: rgba(0, 0, 0, .3);
}
.radio input:checked + span {
  border-color: var(--orange); color: var(--gold);
  background: rgba(255, 122, 26, .12); font-weight: 700;
}
.form-tip { font-size: 12px; color: var(--muted); text-align: center; margin-top: 14px; }
.form-success { text-align: center; padding: 30px 10px; }
.ok-icon {
  width: 68px; height: 68px; border-radius: 50%; margin: 0 auto 18px;
  display: grid; place-items: center; font-size: 30px; color: #fff;
  background: linear-gradient(135deg, #2ecc71, #1abc9c);
  box-shadow: 0 10px 34px rgba(46, 204, 113, .4);
}
.form-success h3 { font-size: 24px; margin-bottom: 10px; }
.form-success p { color: var(--muted); font-size: 15px; margin-bottom: 20px; }
.form-success b { color: var(--gold); }

/* ---------- 页脚 ---------- */
.footer { background: #07080d; border-top: 1px solid var(--line); padding: 60px 0 40px; }
.footer-brands { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 26px; margin-bottom: 36px; }
.footer-logo { height: 46px; width: auto; margin-bottom: 10px; }
.footer-brand-main { display: flex; flex-direction: column; align-items: flex-start; }
.footer-brands span {
  display: inline-block; font-size: 11.5px; letter-spacing: 2px; color: var(--orange);
  border: 1px solid rgba(255, 122, 26, .35); border-radius: 999px;
  padding: 3px 12px; margin-bottom: 12px;
}
.footer-brands b { display: block; font-size: 16px; margin-bottom: 6px; }
.footer-brands em { font-style: normal; font-size: 13px; color: var(--muted); }
.footer-disclaimer { font-size: 12.5px; color: #5d6678; line-height: 1.8; margin-bottom: 18px; }
.footer-copy { font-size: 13px; color: #5d6678; }

/* ---------- 弹窗 / 悬浮 / Toast ---------- */
.lightbox {
  position: fixed; inset: 0; z-index: 200; display: none;
  background: rgba(5, 6, 10, .92); backdrop-filter: blur(8px);
  place-items: center; padding: 4vh 4vw;
}
.lightbox.show { display: grid; }
.lightbox-inner { width: min(1080px, 100%); position: relative; }
.lightbox-inner h4 { font-size: 17px; margin-bottom: 12px; color: var(--gold); }
.lightbox-inner video {
  width: 100%; max-height: 78vh; border-radius: 14px;
  background: #000; border: 1px solid var(--line); box-shadow: var(--shadow);
}
.lightbox-close {
  position: absolute; top: -12px; right: -12px; width: 42px; height: 42px;
  border-radius: 50%; border: 1px solid var(--line); cursor: pointer;
  background: var(--bg3); color: var(--text); font-size: 17px;
}
.lightbox-close:hover { background: var(--red); border-color: var(--red); }
.float-cta {
  display: none; position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%);
  z-index: 90; background: var(--grad); color: #fff; font-weight: 800;
  padding: 13px 44px; border-radius: 999px; font-size: 16px;
  box-shadow: 0 12px 40px rgba(255, 90, 30, .55);
}
.toast {
  position: fixed; top: 84px; left: 50%; transform: translateX(-50%) translateY(-20px);
  z-index: 300; background: rgba(20, 24, 36, .95); border: 1px solid var(--line);
  color: var(--text); padding: 12px 24px; border-radius: 12px; font-size: 14.5px;
  opacity: 0; pointer-events: none; transition: opacity .3s, transform .3s;
  box-shadow: var(--shadow);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- Hero 主图与核心大数字 ---------- */
.hero-banner {
  max-width: 1020px; margin: 8px auto 30px;
  border-radius: 20px; overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .12);
  box-shadow: 0 30px 80px rgba(0, 0, 0, .55), 0 0 60px rgba(255, 100, 30, .12);
  transition: transform .35s;
}
.hero-banner:hover { transform: translateY(-4px); }
.hero-banner img { width: 100%; display: block; }
.hero-key { margin: 0 auto 30px; max-width: 1020px; }
.hero-key-main {
  display: flex; align-items: center; gap: 26px; text-align: left;
  background: linear-gradient(96deg, rgba(255, 122, 26, .13), rgba(255, 61, 84, .07));
  border: 1px solid rgba(255, 122, 26, .35);
  border-radius: var(--radius); padding: 20px 30px;
}
.hero-key-main > b {
  font-size: clamp(32px, 4.4vw, 58px); font-weight: 900; white-space: nowrap;
  font-family: Consolas, "PingFang SC", "Microsoft YaHei", monospace;
  letter-spacing: -.5px;
  background: linear-gradient(96deg, #ffc86e, #ff5a2c);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  line-height: 1;
}
.hero-key-main > b i { font-style: normal; }
.hero-key-desc { display: flex; flex-direction: column; gap: 4px; }
.hero-key-desc strong { font-size: 17px; font-weight: 800; }
.hero-key-desc span { font-size: 14px; color: var(--muted); }
.hero-key-desc em { font-style: normal; color: var(--gold); font-weight: 700; }

/* ---------- 平台大数据卡 ---------- */
.stat-band { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-bottom: 50px; }
.sb-card {
  position: relative; text-align: center;
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 28px 18px 22px;
  transition: transform .3s, background .3s, border-color .3s;
}
.sb-card:hover { transform: translateY(-5px); background: var(--card-hover); border-color: rgba(255, 122, 26, .4); }
.sb-card.hot {
  background: linear-gradient(160deg, rgba(255, 122, 26, .14), rgba(255, 61, 84, .07));
  border-color: rgba(255, 122, 26, .5);
}
.sb-icon {
  width: 50px; height: 50px; margin: 0 auto 14px; border-radius: 14px;
  font-size: 24px; display: grid; place-items: center;
  background: rgba(255, 122, 26, .12); border: 1px solid rgba(255, 122, 26, .3);
}
.sb-card b {
  display: block; font-size: clamp(22px, 2.2vw, 32px); font-weight: 900; line-height: 1.15;
  font-family: Consolas, "PingFang SC", "Microsoft YaHei", monospace;
  background: linear-gradient(96deg, #ffc86e, #ff5a2c);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  white-space: nowrap;
}
.sb-card b i { font-style: normal; }
.sb-card em {
  display: block; font-style: normal; margin-top: 4px;
  font-size: 14px; font-weight: 700; color: var(--gold);
}
.sb-card span { display: block; margin-top: 10px; font-size: 13.5px; color: var(--muted); line-height: 1.55; }
.sb-src {
  display: block; margin-top: 12px; font-style: normal;
  font-size: 11px; letter-spacing: 1px; color: #6e7890;
  border-top: 1px dashed var(--line); padding-top: 8px; width: 100%;
}
.chip-solid {
  background: rgba(255, 194, 75, .12); border-color: rgba(255, 194, 75, .45); color: var(--gold);
  font-weight: 700;
}

/* 合并板块：三大 CG 大图 + 简介 */
.works-badges { max-width: 720px; margin: -26px auto 46px; }
.case-grid { margin-bottom: 46px; }
.cg-rows { display: flex; flex-direction: column; gap: 40px; margin-bottom: 50px; }
.cg-row { display: grid; grid-template-columns: 1.6fr 1fr; gap: 34px; align-items: center; }
.cg-row:nth-child(even) .cg-video { order: 2; }
.cg-video {
  position: relative; border-radius: var(--radius); overflow: hidden; cursor: pointer;
  aspect-ratio: 16/9; background: #000;
  border: 1px solid rgba(255, 122, 26, .5);
  box-shadow: 0 0 0 1px rgba(255, 122, 26, .18), 0 22px 60px rgba(255, 90, 30, .18);
  transition: transform .3s, border-color .3s, box-shadow .3s;
}
.cg-video:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 122, 26, .95);
  box-shadow: 0 0 0 1px rgba(255, 122, 26, .35), 0 26px 70px rgba(255, 90, 30, .3);
}
.cg-video img { width: 100%; height: 100%; object-fit: cover; }
.cg-video .play {
  position: absolute; inset: auto; left: 16px; bottom: 14px;
  width: auto; height: auto; margin: 0; line-height: 1.2;
  padding: 8px 18px; border-radius: 999px;
  background: rgba(10, 12, 18, .68); color: #ffc86e;
  border: 1px solid rgba(255, 122, 26, .55);
  font-size: 14px; font-weight: 700; letter-spacing: 1px;
  backdrop-filter: blur(6px);
  transition: transform .3s, background .3s, color .3s;
}
.cg-video:hover .play { background: rgba(255, 122, 26, .95); color: #fff; transform: scale(1.05); }
.cg-dur {
  position: absolute; right: 16px; bottom: 14px; padding: 5px 14px;
  border-radius: 8px; font-size: 13px; font-weight: 700;
  font-family: Consolas, monospace; color: #fff;
  background: rgba(0, 0, 0, .68); border: 1px solid rgba(255, 255, 255, .18);
}
.cg-tag {
  display: inline-block; font-size: 12.5px; font-weight: 800; letter-spacing: 1px;
  color: var(--orange); padding: 5px 14px; border-radius: 999px;
  border: 1px solid rgba(255, 122, 26, .4); background: rgba(255, 122, 26, .08);
  margin-bottom: 14px;
}
.cg-info h3 { font-size: clamp(22px, 2.4vw, 30px); font-weight: 900; margin-bottom: 12px; line-height: 1.35; }
.cg-info p { color: var(--muted); font-size: 15px; line-height: 1.85; margin-bottom: 16px; }
.cg-info .chip-row { margin-top: 0; }

/* ---------- 导师案例板块 ---------- */
.mentor { background: var(--bg2); border-bottom: 1px solid var(--line); }
.mentor-feature {
  display: grid; grid-template-columns: 1.15fr .85fr; gap: 34px;
  align-items: center; margin-bottom: 54px;
}
.mf-video {
  position: relative; border-radius: var(--radius); overflow: hidden;
  cursor: pointer; aspect-ratio: 16/9; background: #000;
  border: 1px solid var(--line); box-shadow: var(--shadow);
  transition: transform .3s, border-color .3s;
}
.mf-video:hover { transform: translateY(-4px); border-color: rgba(255, 122, 26, .5); }
.mf-video img { width: 100%; height: 100%; object-fit: cover; }
.mf-video .play {
  position: absolute; inset: 0; margin: auto; width: 84px; height: 84px;
  border-radius: 50%; background: rgba(255, 122, 26, .92); color: #fff;
  font-size: 30px; display: grid; place-items: center;
  box-shadow: 0 10px 40px rgba(255, 90, 30, .55); transition: transform .3s;
}
.mf-video:hover .play { transform: scale(1.12); }
.mf-tag {
  position: absolute; top: 16px; left: 16px; padding: 6px 16px;
  border-radius: 999px; font-size: 13px; font-weight: 700;
  background: rgba(0, 0, 0, .55); color: var(--gold);
  border: 1px solid rgba(255, 194, 75, .5); backdrop-filter: blur(6px);
}
.mf-info h3 { font-size: clamp(22px, 2.6vw, 30px); font-weight: 900; margin-bottom: 14px; }
.mf-info p { color: var(--muted); font-size: 15px; margin-bottom: 20px; }
.mf-info p b { color: var(--gold); }
.mf-hint { font-size: 13.5px !important; color: #35c26a !important; margin: 14px 0 0 !important; }
.case-link, .mf-link { cursor: pointer; }
.mf-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.mf-stats > div {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 12px; padding: 14px 16px; text-align: center;
}
.mf-stats b { display: block; font-size: 21px; font-weight: 900; color: var(--gold); }
.mf-stats span { font-size: 12.5px; color: var(--muted); }

.case-label {
  display: flex; align-items: baseline; gap: 14px; margin-bottom: 22px;
  font-size: 21px; font-weight: 900;
}
.case-label i {
  width: 6px; height: 22px; border-radius: 3px; align-self: center;
  background: var(--grad);
}
.case-label span { font-size: 13px; font-weight: 400; color: var(--muted); }
.case-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 18px; }
.case-big {
  grid-column: span 2; position: relative; border-radius: var(--radius);
  overflow: hidden; cursor: pointer; aspect-ratio: 16/9; background: #000;
  border: 1px solid var(--line); transition: transform .3s, border-color .3s, box-shadow .3s;
}
.case-big.wide { grid-column: span 3; }
.case-big:hover { transform: translateY(-5px); border-color: rgba(255, 122, 26, .55); box-shadow: var(--shadow); }
.case-big img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.case-big:hover img { transform: scale(1.04); }
.case-mask {
  position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: flex-end;
  padding: 20px 24px; gap: 3px;
  background: linear-gradient(180deg, transparent 35%, rgba(5, 6, 10, .88));
}
.case-mask b { font-size: 21px; font-weight: 900; text-shadow: 0 2px 12px rgba(0, 0, 0, .6); }
.case-mask span { font-size: 13px; color: #cfd6e4; }
.case-mask em {
  position: absolute; right: 20px; bottom: 20px; font-style: normal;
  font-size: 13px; font-weight: 700; color: #fff;
  padding: 7px 16px; border-radius: 999px;
  background: rgba(255, 122, 26, .9); box-shadow: 0 6px 20px rgba(255, 90, 30, .45);
}

/* ---------- 精品课目录 ---------- */
.syl-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.syl-card {
  position: relative; padding: 22px 24px 20px;
  background: var(--card); border: 1px solid var(--line);
  border-radius: 14px; transition: transform .3s, background .3s, border-color .3s;
}
.syl-card:hover { transform: translateY(-3px); background: var(--card-hover); border-color: rgba(255, 122, 26, .4); }
.syl-card i {
  font-style: normal; font-family: Consolas, monospace; font-weight: 900;
  font-size: 15px; color: var(--orange); letter-spacing: 1px;
}
.syl-card b { display: block; font-size: 17px; margin: 6px 0 6px; }
.syl-card span { display: block; font-size: 13.5px; color: var(--muted); line-height: 1.65; }
.syl-card em {
  display: block; margin-top: 10px; font-style: normal;
  font-size: 12.5px; color: var(--gold); line-height: 1.7;
}
.syl-extra {
  display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-top: 28px;
}
.syl-extra span {
  font-size: 13.5px; color: #cfd6e4; padding: 9px 18px;
  border-radius: 999px; background: rgba(255, 122, 26, .08);
  border: 1px solid rgba(255, 122, 26, .3);
}
@media (max-width: 1024px) { .syl-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .syl-grid { grid-template-columns: 1fr; } }

/* ---------- 算力租赁 ---------- */
.compute-card { margin-top: 34px; padding: 30px 32px; }
.compute-head { margin-bottom: 22px; }
.compute-head b { display: block; font-size: 21px; font-weight: 900; margin-bottom: 6px; }
.compute-head span { font-size: 14px; color: var(--muted); }
.compute-opts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.copt {
  position: relative; background: rgba(0, 0, 0, .25);
  border: 1px solid var(--line); border-radius: 14px; padding: 22px;
}
.copt i {
  font-style: normal; font-size: 12px; font-weight: 800; letter-spacing: 1px;
  color: var(--orange); display: block; margin-bottom: 8px;
}
.copt b { display: block; font-size: 17px; margin-bottom: 8px; }
.copt p { font-size: 13.5px; color: var(--muted); }
.copt.hot { border-color: rgba(255, 122, 26, .55); background: rgba(255, 122, 26, .08); }
.copt-tag {
  display: inline-block; margin-top: 12px; font-size: 12px; font-weight: 700;
  color: var(--gold); border: 1px solid rgba(255, 194, 75, .4);
  padding: 4px 12px; border-radius: 999px; background: rgba(255, 194, 75, .08);
}
.compute-card .src-note { margin-top: 18px; }

/* ---------- 响应式补充 ---------- */
@media (max-width: 1024px) {
  .stat-band { grid-template-columns: repeat(2, 1fr); }
  .cg-row { grid-template-columns: 1fr; gap: 20px; }
  .cg-row:nth-child(even) .cg-video { order: 0; }
  .hero-inner { grid-template-columns: 1fr; text-align: center; gap: 30px; padding-top: 110px; }
  .hero-copy { align-items: center; }
  .hero-actions { justify-content: center; }
  .hero-poster { max-width: 320px; }
  .mentor-feature { grid-template-columns: 1fr; }
  .case-grid { grid-template-columns: repeat(2, 1fr); }
  .case-big, .case-big.wide { grid-column: span 1; }
  .compute-opts { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .hero-key-main { flex-direction: column; text-align: center; gap: 10px; }
  .hero-key-desc { align-items: center; }
  .mf-stats { grid-template-columns: repeat(3, 1fr); }
  .case-grid { grid-template-columns: 1fr; }
  .case-mask b { font-size: 18px; }
}
@media (max-width: 520px) {
  .case-grid { grid-template-columns: 1fr; }
  .compute-card { padding: 22px 18px; }
}

/* ---------- 入场动画 ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .course-flow { grid-template-columns: repeat(3, 1fr); }
  .path-flow { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .platform-grid { grid-template-columns: 1fr; }
  .enroll-grid { grid-template-columns: 1fr; gap: 36px; }
}
@media (max-width: 768px) {
  .section { padding: 60px 0; }
  .nav-links {
    display: none; position: absolute; top: 70px; left: 3%; right: 3%;
    flex-direction: column; gap: 2px; background: rgba(12, 15, 22, .97);
    border: 1px solid var(--line); border-radius: 14px; padding: 12px;
    backdrop-filter: blur(14px);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 16px; }
  .nav-toggle { display: block; }
  .nav-cta { display: none; }

  /* 首屏紧凑化 */
  .hero-inner { padding: 104px 0 28px; gap: 24px; }
  .hero-title { font-size: clamp(32px, 9vw, 42px); margin-bottom: 14px; }
  .hero-sub { font-size: 14.5px; margin-bottom: 22px; }
  .hero-badge { font-size: 12.5px; padding: 7px 16px; margin-bottom: 18px; }
  .hero-actions { margin-bottom: 22px; }
  .hero-actions .btn { width: 100%; }
  .hero-poster { max-width: 270px; animation: none; }
  .marquee { animation-duration: 26s; }
  .marquee span { font-size: 13px; letter-spacing: 1px; }

  /* 区块与卡片 */
  .sec-head { margin-bottom: 36px; }
  .sec-head h2 { font-size: clamp(23px, 6.5vw, 28px); }
  .sec-head p { font-size: 13.5px; }
  .case-label { font-size: 18px; }
  .cg-rows { gap: 30px; margin-bottom: 36px; }
  .cg-info h3 { font-size: 20px; }
  .cg-info p { font-size: 14px; }
  .case-grid { margin-bottom: 36px; }
  .grid-3, .course-feats { grid-template-columns: 1fr; }
  .income-top { grid-template-columns: 1fr; }
  .course-flow { grid-template-columns: 1fr; }
  .path-flow { grid-template-columns: 1fr 1fr; }
  .footer-brands { grid-template-columns: 1fr; gap: 20px; }
  .platform-right { grid-template-columns: 1fr; }

  /* 底部悬浮按钮避让 */
  .float-cta { display: block; font-size: 15px; padding: 12px 38px; }
  body { padding-bottom: 60px; }
  .income-table { -webkit-overflow-scrolling: touch; }
}
@media (max-width: 520px) {
  .stat-band { grid-template-columns: 1fr; }
  .grid-3, .income-top, .course-feats, .course-flow, .path-flow, .grid-4 { grid-template-columns: 1fr; }
  .works-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .itop-card h4 { min-height: 0; }
  .enroll-form-card { padding: 24px 18px; }
}


/* ---------- 精品课目录（章节列表式） ---------- */
.syl-section {
  background:
    radial-gradient(50% 60% at 88% 8%, rgba(255, 122, 26, .08), transparent 60%),
    radial-gradient(40% 50% at 5% 95%, rgba(255, 61, 84, .05), transparent 60%),
    var(--bg2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.syl-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 30px; margin-bottom: 40px; flex-wrap: wrap; }
.syl-head-left h2 { font-size: clamp(26px, 3.6vw, 40px); font-weight: 900; margin-top: 14px; text-align: left; }
.syl-head-right { display: flex; align-items: center; gap: 14px; padding: 14px 22px; border-radius: 14px; background: rgba(255, 122, 26, .08); border: 1px solid rgba(255, 122, 26, .35); }
.syl-head-right b { font-size: 46px; font-weight: 900; line-height: 1; background: linear-gradient(96deg, #ffc86e, #ff5a2c); -webkit-background-clip: text; background-clip: text; color: transparent; }
.syl-head-right span { font-size: 13.5px; color: var(--muted); line-height: 1.6; }
.syl-list { display: flex; flex-direction: column; }
.syl-row { display: grid; grid-template-columns: 72px 1fr 300px; gap: 20px; align-items: center; padding: 18px 10px; border-bottom: 1px dashed rgba(255, 255, 255, .12); transition: background .25s, padding .25s; }
.syl-row:first-child { border-top: 1px dashed rgba(255, 255, 255, .12); }
.syl-row:hover { background: rgba(255, 122, 26, .06); padding-left: 18px; }
.syl-row i { font-style: normal; font-family: Consolas, monospace; font-weight: 900; font-size: 30px; background: linear-gradient(180deg, #ffc86e, #ff5a2c); -webkit-background-clip: text; background-clip: text; color: transparent; }
.syl-main b { display: block; font-size: 17.5px; margin-bottom: 3px; }
.syl-main span { font-size: 13.5px; color: var(--muted); }
.syl-row em { font-style: normal; justify-self: end; text-align: right; font-size: 13px; color: var(--gold); line-height: 1.6; }
@media (max-width: 900px) {
  .syl-row { grid-template-columns: 56px 1fr; }
  .syl-row em { grid-column: 2; justify-self: start; text-align: left; }
  .syl-row i { font-size: 24px; }
}


/* ---------- 热知识 · 红果短剧 ---------- */
.hot-section { background: radial-gradient(55% 60% at 92% 10%, rgba(255, 61, 84, .12), transparent 60%), radial-gradient(45% 55% at 4% 92%, rgba(255, 122, 26, .08), transparent 60%), var(--bg); }
.hot-tag { color: #ff5a6e; border-color: rgba(255, 61, 84, .45); background: rgba(255, 61, 84, .08); }
.hot-grad { background: linear-gradient(96deg, #ff5a2c, #ff3d54); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hot-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.hot-card { position: relative; padding: 26px 22px 22px; overflow: hidden; background: var(--card); border: 1px solid var(--line); border-radius: 16px; transition: transform .3s, border-color .3s, box-shadow .3s; }
.hot-card:hover { transform: translateY(-4px); border-color: rgba(255, 61, 84, .55); box-shadow: 0 16px 44px rgba(255, 61, 84, .15); }
.hot-card i { position: absolute; top: 12px; right: 16px; font-style: normal; font-family: Consolas, monospace; font-size: 15px; font-weight: 900; color: rgba(255, 255, 255, .14); }
.hot-card b { display: block; font-size: clamp(26px, 2.6vw, 36px); font-weight: 900; line-height: 1.15; background: linear-gradient(96deg, #ff8a5c, #ff3d54); -webkit-background-clip: text; background-clip: text; color: transparent; margin-bottom: 8px; white-space: nowrap; }
.hot-card span { font-size: 13.5px; color: var(--muted); line-height: 1.65; display: block; }
.hot-card-star { border-color: rgba(255, 61, 84, .5); background: linear-gradient(160deg, rgba(255, 61, 84, .12), rgba(255, 122, 26, .05)); }
@media (max-width: 1024px) { .hot-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .hot-grid { grid-template-columns: 1fr; } }

/* 导航当前板块高亮 */
.nav-links a.active { color: var(--gold); background: rgba(255, 122, 26, .14); }