/* 极光描物 · 落地页 */

/* ---------------- HERO ---------------- */
.hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: 148px var(--pad) 96px;
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  gap: 56px;
  align-items: center;
}
.hero h1 {
  font-family: var(--serif);
  font-size: clamp(54px, 6.6vw, 100px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  font-weight: 700;
}
.lede {
  margin-top: 26px;
  max-width: 540px;
  font-size: 17.5px;
  line-height: 1.8;
  color: var(--dim);
}
.lede strong { color: var(--ink); font-weight: 600; }
.hero-cta { display: flex; gap: 12px; margin-top: 34px; flex-wrap: wrap; }
.hero-proof {
  display: flex; flex-wrap: wrap; gap: 0; margin-top: 36px;
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em; color: var(--dim);
}
.hero-proof li { display: flex; align-items: center; }
.hero-proof li::after { content: "/"; margin: 0 12px; color: var(--line-strong); }
.hero-proof li:last-child::after { display: none; }
.hero-note {
  margin-top: 26px; display: flex; align-items: center; gap: 10px;
  font-size: 13px; color: var(--dim);
}
.hero-note .dot {
  width: 6px; height: 6px; border-radius: 50%; background: var(--accent-2);
  box-shadow: 0 0 0 4px rgba(23, 117, 108, 0.14);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.35; } }

/* 播放器外壳 */
.hero-stage {
  background: var(--dark);
  border: 1px solid rgba(20, 24, 29, 0.35);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 30px 70px -30px rgba(20, 24, 29, 0.55), 0 2px 0 rgba(255, 255, 255, 0.3) inset;
  position: relative;
}
.stage-chrome {
  display: flex; align-items: center; gap: 12px;
  height: 42px; padding: 0 14px;
  background: var(--dark-2);
  border-bottom: 1px solid rgba(244, 240, 230, 0.08);
}
.stage-dots { display: flex; gap: 5px; }
.stage-dots i { width: 7px; height: 7px; border-radius: 50%; background: rgba(244, 240, 230, 0.18); }
.stage-dots i:first-child { background: rgba(255, 107, 74, 0.7); }
.stage-title { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.1em; color: var(--dark-dim); }
.stage-tag {
  margin-left: auto; font-family: var(--mono); font-size: 9px; letter-spacing: 0.18em;
  color: #FF8A70; border: 1px solid rgba(255, 107, 74, 0.4); padding: 3px 7px; border-radius: 2px;
}
.stage-body { background: #000; min-height: 200px; }
.stage-body .fkp { border: 0; border-radius: 0; background: #000; }
.stage-body .fkp-stage { border-radius: 0; }
.stage-loading {
  aspect-ratio: 16 / 9; display: grid; place-items: center;
  color: rgba(244, 240, 230, 0.4); font-size: 12px; font-family: var(--mono); letter-spacing: 0.14em;
}
.stage-foot {
  display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap;
  padding: 12px 14px; border-top: 1px solid rgba(244, 240, 230, 0.08);
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.06em; color: rgba(244, 240, 230, 0.45);
}
.stage-foot code { color: rgba(244, 240, 230, 0.72); }
.stage-hint { color: rgba(244, 240, 230, 0.3); }

/* ---------------- PROBLEM ---------------- */
.problem {
  background: var(--dark);
  color: var(--paper);
  padding: 110px 0 100px;
  position: relative;
  overflow: hidden;
}
.problem::before {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(244, 240, 230, 0.035) 1px, transparent 1px), linear-gradient(90deg, rgba(244, 240, 230, 0.035) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse 70% 60% at 20% 0%, #000 20%, transparent 75%);
  pointer-events: none;
}
.problem > * { position: relative; }
.problem .section-head, .problem .problem-grid, .problem .compare { max-width: var(--max); margin-left: auto; margin-right: auto; padding-left: var(--pad); padding-right: var(--pad); }
.problem-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 42px;
  margin-top: 64px;
}
.p-card { border-top: 1px solid var(--dark-line); padding-top: 26px; }
.p-no { font-family: var(--mono); font-size: 11px; letter-spacing: 0.18em; color: #FF6B4A; }
.p-card h3 { font-family: var(--serif); font-size: 24px; margin-top: 14px; font-weight: 700; }
.p-card p { margin-top: 12px; font-size: 14.5px; line-height: 1.85; color: var(--dark-dim); }

.compare { margin-top: 76px; }
.compare-head, .compare-row { display: grid; grid-template-columns: 0.9fr 1.15fr 1.35fr; }
.compare-head { border-bottom: 1px solid rgba(244, 240, 230, 0.3); }
.compare-row { border-bottom: 1px solid rgba(244, 240, 230, 0.1); }
.compare-head .cmp-cell { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.16em; color: rgba(244, 240, 230, 0.5); padding: 14px 18px; }
.compare-row .cmp-cell { padding: 16px 18px; font-size: 14px; color: var(--dark-dim); }
.compare-row .cmp-cell:first-child { color: rgba(244, 240, 230, 0.85); }
.cmp-cell.accent { background: rgba(255, 107, 74, 0.07); color: #F4EFE3; border-left: 1px solid rgba(255, 107, 74, 0.2); }
.compare-head .cmp-cell.accent { color: #FF8A70; }
.cmp-cell.accent b { color: #FFB4A2; font-weight: 600; }

/* ---------------- FLOW ---------------- */
.flow { max-width: var(--max); margin: 0 auto; padding: 110px var(--pad) 104px; }
.flow-list {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0;
  margin-top: 62px; border-top: 1px solid var(--line-strong);
}
.flow-list li {
  padding: 30px 30px 30px 0; border-right: 1px solid var(--line);
  position: relative;
}
.flow-list li:last-child { border-right: 0; }
.flow-list li::before {
  content: ""; position: absolute; top: -1px; left: 0; width: 34px; height: 3px; background: var(--accent);
  transform: scaleX(0); transform-origin: left; transition: transform 0.6s ease 0.1s;
}
.flow-list li.in::before { transform: scaleX(1); }
.f-no { font-family: var(--mono); font-size: 11px; letter-spacing: 0.18em; color: var(--accent); }
.flow-list h3 { font-family: var(--serif); font-size: 26px; margin-top: 12px; }
.flow-list p { margin-top: 12px; font-size: 14px; line-height: 1.8; color: var(--dim); padding-right: 12px; }
.f-meta {
  margin-top: 18px; font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.08em;
  color: var(--dim-2); padding-top: 12px; border-top: 1px dashed var(--line);
}

/* ---------------- ENGINE ---------------- */
.engine { max-width: var(--max); margin: 0 auto; padding: 20px var(--pad) 110px; }
.cap-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 56px; }
.cap {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.28);
  padding: 30px 28px 32px;
  border-radius: 4px;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease, background 0.3s ease;
}
.cap:hover { transform: translateY(-3px); box-shadow: 0 18px 40px -26px rgba(20, 24, 29, 0.5); background: rgba(255, 255, 255, 0.5); }
.cap.highlight { border-color: rgba(200, 64, 42, 0.32); background: rgba(200, 64, 42, 0.045); }
.cap-icon { width: 34px; height: 34px; color: var(--accent); margin-bottom: 22px; }
.cap-icon svg { width: 100%; height: 100%; fill: none; stroke: currentColor; stroke-width: 1.4; }
.cap h3 { font-family: var(--serif); font-size: 21px; font-weight: 700; letter-spacing: 0.01em; }
.cap h3 em {
  font-style: normal; font-family: var(--mono); font-size: 9px; letter-spacing: 0.16em;
  color: var(--accent); border: 1px solid rgba(200, 64, 42, 0.4); padding: 2px 5px;
  vertical-align: middle; margin-left: 8px; border-radius: 2px;
}
.cap p { margin-top: 12px; font-size: 14px; line-height: 1.8; color: var(--dim); }
.cap p code { color: var(--ink); background: rgba(20, 24, 29, 0.06); padding: 1px 5px; border-radius: 2px; }

.code-strip {
  margin-top: 64px;
  display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 0;
  background: var(--dark-2); border-radius: 8px; overflow: hidden;
  border: 1px solid rgba(20, 24, 29, 0.4);
}
.code-copy { padding: 48px 44px; color: var(--paper); }
.code-copy .eyebrow { color: #FF8A70; }
.code-copy h3 { font-family: var(--serif); font-size: clamp(26px, 2.4vw, 34px); line-height: 1.3; }
.code-copy p { margin-top: 18px; font-size: 14px; line-height: 1.85; color: var(--dark-dim); }
.code-copy p code { color: #FFB4A2; }
.code-copy .link-arrow { margin-top: 26px; color: #FF8A70; border-color: rgba(255, 107, 74, 0.4); }
.code-strip pre.code-block { border: 0; border-radius: 0; background: #0A0E13; padding: 40px 34px; }

/* ---------------- TEMPLATES ---------------- */
.templates { background: var(--paper-2); padding: 104px 0 96px; }
.templates .section-head, .tpl-grid, .tpl-more { max-width: var(--max); margin-left: auto; margin-right: auto; padding-left: var(--pad); padding-right: var(--pad); }
.tpl-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 54px; }
.tpl-card {
  display: block; background: var(--paper); border: 1px solid var(--line);
  border-radius: 5px; overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.tpl-card:hover { transform: translateY(-4px); box-shadow: 0 24px 44px -30px rgba(20, 24, 29, 0.6); border-color: var(--line-strong); }
.tpl-poster {
  position: relative; aspect-ratio: 16 / 9; background: var(--dark); overflow: hidden;
  display: flex; align-items: center; justify-content: center;
}
.tpl-poster img { position: relative; z-index: 1; width: 100%; height: 100%; object-fit: cover; }
.tpl-poster .fallback {
  position: absolute; inset: 0; z-index: 0;
  background-image: linear-gradient(rgba(244, 240, 230, 0.05) 1px, transparent 1px), linear-gradient(90deg, rgba(244, 240, 230, 0.05) 1px, transparent 1px);
  background-size: 40px 40px;
  display: flex; align-items: center; justify-content: center;
}
.tpl-poster .fallback span {
  font-family: var(--serif); color: rgba(244, 240, 230, 0.24); font-size: 42px; letter-spacing: 0.02em;
}
.tpl-card:hover .tpl-poster img { transform: scale(1.02); transition: transform 0.6s ease; }
.tpl-body { padding: 18px 20px 20px; display: flex; justify-content: space-between; gap: 16px; align-items: flex-start; }
.tpl-body h3 { font-family: var(--serif); font-size: 18px; font-weight: 700; line-height: 1.4; }
.tpl-body p { margin-top: 6px; font-size: 12.5px; color: var(--dim); }
.tpl-meta { text-align: right; flex: 0 0 auto; }
.tpl-meta .dur { font-family: var(--mono); font-size: 11px; color: var(--dim); letter-spacing: 0.06em; }
.tpl-meta .go { display: block; margin-top: 8px; font-size: 15px; color: var(--accent); }
.tpl-loading { grid-column: 1 / -1; padding: 60px 0; text-align: center; color: var(--dim); font-size: 14px; }
.tpl-more {
  margin-top: 34px; display: flex; justify-content: space-between; align-items: center; gap: 20px;
  font-size: 14px; color: var(--dim); flex-wrap: wrap;
}

/* ---------------- PRICING ---------------- */
.pricing { max-width: var(--max); margin: 0 auto; padding: 110px var(--pad) 100px; }
.price-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 56px; }
.price {
  border: 1px solid var(--line); padding: 34px 30px 32px; border-radius: 5px;
  background: rgba(255, 255, 255, 0.34);
  position: relative; display: flex; flex-direction: column;
}
.price.featured { border: 1.5px solid var(--accent); background: rgba(255, 255, 255, 0.6); box-shadow: 0 24px 50px -34px rgba(200, 64, 42, 0.55); }
.price .badge {
  position: absolute; top: -11px; left: 26px;
  background: var(--accent); color: #FBF6EA;
  font-size: 11px; letter-spacing: 0.08em; padding: 4px 10px; border-radius: 2px;
}
.price-head h3 { font-family: var(--serif); font-size: 21px; }
.price-head p { margin-top: 6px; font-size: 13px; color: var(--dim); }
.price-num { margin: 26px 0 24px; font-family: var(--serif); font-size: 46px; font-weight: 700; line-height: 1; display: flex; align-items: baseline; gap: 4px; }
.price-num span { font-size: 22px; font-weight: 500; margin-right: 2px; }
.price-num small { font-family: var(--sans); font-size: 13px; font-weight: 400; color: var(--dim); margin-left: 6px; }
.price ul { display: flex; flex-direction: column; gap: 10px; margin-bottom: 28px; }
.price li { font-size: 13.5px; color: var(--ink-2); padding-left: 18px; position: relative; }
.price li::before { content: ""; position: absolute; left: 0; top: 9px; width: 8px; height: 1px; background: var(--accent); }
.price .btn { margin-top: auto; }
.price-note { margin-top: 26px; font-size: 12.5px; color: var(--dim); }

/* ---------------- FAQ ---------------- */
.faq { max-width: var(--max); margin: 0 auto; padding: 20px var(--pad) 110px; display: grid; grid-template-columns: 320px 1fr; gap: 60px; }
.faq-left h2 { font-family: var(--serif); font-size: 34px; margin-bottom: 14px; }
.faq-left p { font-size: 14px; color: var(--dim); }
.faq-left a { color: var(--accent); border-bottom: 1px solid rgba(200, 64, 42, 0.35); }
.faq-list { border-top: 1px solid var(--line-strong); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary {
  list-style: none; cursor: pointer; padding: 22px 40px 22px 0; position: relative;
  font-size: 16px; font-weight: 500; transition: color 0.2s ease;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary:hover { color: var(--accent); }
.faq-list summary::after {
  content: "+"; position: absolute; right: 4px; top: 50%; transform: translateY(-50%);
  font-family: var(--mono); font-size: 18px; color: var(--dim); font-weight: 400;
}
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { padding: 0 40px 24px 0; font-size: 14px; line-height: 1.9; color: var(--dim); }

/* ---------------- CTA ---------------- */
.cta-final {
  background: var(--dark); color: var(--paper); position: relative; overflow: hidden;
  padding: 120px var(--pad);
}
.cta-inner { max-width: var(--max); margin: 0 auto; position: relative; z-index: 2; }
.cta-final h2 { font-family: var(--serif); font-size: clamp(34px, 4.2vw, 58px); line-height: 1.24; }
.cta-actions { display: flex; gap: 12px; margin-top: 40px; flex-wrap: wrap; }
.cta-actions .btn-outline { border-color: rgba(244, 240, 230, 0.34); color: var(--paper); }
.cta-actions .btn-outline:hover { background: rgba(244, 240, 230, 0.08); border-color: var(--paper); }
.cta-note { margin-top: 26px; font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em; color: rgba(244, 240, 230, 0.44); }
.seal-large {
  position: absolute; right: -4%; top: 50%; transform: translateY(-50%) rotate(-6deg);
  font-family: var(--serif); font-size: clamp(140px, 19vw, 280px); font-weight: 700;
  color: transparent; -webkit-text-stroke: 1.5px rgba(255, 107, 74, 0.2);
  letter-spacing: 0.04em; line-height: 1; pointer-events: none; z-index: 1;
  white-space: nowrap;
}

/* ---------------- FOOTER ---------------- */
.footer { border-top: 1px solid var(--line); padding: 58px var(--pad) 34px; }
.footer-top { max-width: var(--max); margin: 0 auto; display: flex; justify-content: space-between; gap: 50px; flex-wrap: wrap; }
.footer-brand { display: flex; gap: 14px; align-items: flex-start; }
.footer-brand b { font-family: var(--serif); font-size: 17px; display: block; }
.footer-brand p { margin-top: 6px; font-size: 13px; color: var(--dim); max-width: 280px; }
.footer-cols { display: flex; gap: 70px; flex-wrap: wrap; }
.footer-cols h4 { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.16em; color: var(--dim-2); font-weight: 500; margin-bottom: 14px; }
.footer-cols a { display: block; font-size: 13.5px; color: var(--dim); margin-bottom: 9px; transition: color 0.2s ease; }
.footer-cols a:hover { color: var(--ink); }
.footer-bottom {
  max-width: var(--max); margin: 46px auto 0; padding-top: 22px; border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap;
  font-size: 11.5px; color: var(--dim-2); font-family: var(--mono); letter-spacing: 0.02em;
}
.footer-legal { max-width: 520px; line-height: 1.7; }

/* ---------------- MODAL ---------------- */
.modal { position: fixed; inset: 0; z-index: 1000; display: grid; place-items: center; padding: 24px; }
.modal[hidden] { display: none; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(8, 11, 15, 0.78); backdrop-filter: blur(6px); }
.modal-panel {
  position: relative; z-index: 2; width: min(920px, 100%);
  background: var(--paper); border-radius: 8px; padding: 30px 30px 24px;
  box-shadow: 0 40px 90px -40px rgba(0, 0, 0, 0.8);
  max-height: 92vh; overflow: auto;
}
.modal-close {
  position: absolute; top: 12px; right: 14px; width: 34px; height: 34px; border: 0; background: transparent;
  font-size: 24px; color: var(--dim); cursor: pointer; line-height: 1;
}
.modal-close:hover { color: var(--ink); }
.modal-head h3 { font-family: var(--serif); font-size: 26px; }
.modal-head p { margin-top: 10px; font-size: 14px; color: var(--dim); max-width: 640px; }
.modal-head p code { color: var(--ink); background: rgba(20, 24, 29, 0.06); padding: 1px 5px; }
#modalPlayer { margin-top: 20px; }
.modal-tip { margin-top: 14px; font-size: 12.5px; color: var(--dim); }

/* ---------------- RESPONSIVE ---------------- */
@media (max-width: 1120px) {
  .hero { grid-template-columns: 1fr; gap: 46px; padding-top: 124px; }
  .hero-copy { max-width: 720px; }
  .cap-grid, .tpl-grid, .price-grid { grid-template-columns: repeat(2, 1fr); }
  .flow-list { grid-template-columns: repeat(2, 1fr); }
  .flow-list li { border-bottom: 1px solid var(--line); padding-right: 24px; }
  .flow-list li:nth-child(2n) { border-right: 0; }
  .code-strip { grid-template-columns: 1fr; }
  .faq { grid-template-columns: 1fr; gap: 30px; }
  .nav-links { display: none; }
}
@media (max-width: 760px) {
  .hero { padding-top: 104px; padding-bottom: 64px; }
  .hero h1 { font-size: clamp(44px, 11vw, 62px); }
  .lede { font-size: 16px; }
  .problem { padding: 74px 0 66px; }
  .problem-grid, .cap-grid, .tpl-grid, .price-grid, .flow-list { grid-template-columns: 1fr; gap: 26px; }
  .flow-list li { border-right: 0; padding: 22px 0; }
  .compare-head, .compare-row { grid-template-columns: 1.1fr 1fr; }
  .compare-head .cmp-cell:nth-child(2), .compare-row .cmp-cell:nth-child(2) { display: none; }
  .flow, .engine, .templates, .pricing, .faq { padding-top: 70px; padding-bottom: 70px; }
  .code-copy, .code-strip pre.code-block { padding: 28px 22px; }
  .cta-final { padding: 78px var(--pad); }
  .seal-large { font-size: 180px; right: -8%; opacity: 0.6; }
  .footer-cols { gap: 34px; }
  .nav-actions .btn-ghost { display: none; }
}

/* ---------------- 适用场景 ---------------- */
.audiences { max-width: var(--max); margin: 0 auto; padding: 20px var(--pad) 92px; }
.aud-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 10px; margin-top: 30px; }
.aud-card { position: relative; display: flex; flex-direction: column; min-height: 218px; padding: 20px 18px 16px; border: 1px solid var(--line); border-radius: 6px; background: rgba(255,255,255,.32); transition: transform .2s ease, border-color .2s ease, background .2s ease; }
.aud-card:hover { transform: translateY(-3px); border-color: var(--line-strong); background: #FBF8F0; }
.aud-no { font-family: var(--mono); font-size: 10px; letter-spacing: .14em; color: var(--accent); }
.aud-card h3 { margin-top: 20px; font-family: var(--serif); font-size: 20px; line-height: 1.3; }
.aud-card p { margin-top: 9px; font-size: 12.5px; line-height: 1.75; color: var(--dim); }
.aud-meta { margin-top: auto; padding-top: 18px; font-family: var(--mono); font-size: 9px; letter-spacing: .06em; color: var(--dim-2); line-height: 1.7; }
@media (max-width: 1080px) { .aud-grid { grid-template-columns: repeat(3, minmax(0,1fr)); } }
@media (max-width: 720px) { .audiences { padding-bottom: 60px; } .aud-grid { grid-template-columns: 1fr; gap: 8px; } .aud-card { min-height: 0; } .aud-card h3 { margin-top: 12px; } }