:root {
  --navy: #061325;
  --navy-2: #0a2039;
  --paper: #f5f0e6;
  --ink: #091b32;
  --cyan: #91eee9;
  --cyan-strong: #24c8d8;
  --orange: #ff934d;
  --muted: #65758a;
  --line-dark: rgba(255, 255, 255, 0.16);
  --line-light: rgba(9, 27, 50, 0.14);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 74px; overflow-x: clip; background: #020a14; }
body {
  margin: 0;
  min-width: 0;
  overflow-x: clip;
  color: var(--ink);
  background: #020a14;
  font-family: "PingFang SC", "SF Pro Display", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  -webkit-font-smoothing: antialiased;
  line-break: strict;
}
a { color: inherit; text-decoration: none; -webkit-tap-highlight-color: transparent; }
button { font: inherit; -webkit-tap-highlight-color: transparent; }
img, canvas { display: block; max-width: 100%; }
p, h1, h2, h3 { margin: 0; }
p, li { text-wrap: pretty; }
h1, h2, h3 { text-wrap: balance; }
.nowrap { white-space: nowrap; }

.mobile-page {
  position: relative;
  width: min(100%, 520px);
  margin-inline: auto;
  overflow: hidden;
  background: var(--paper);
  box-shadow: 0 0 80px rgba(0, 0, 0, 0.42);
}

.scroll-progress {
  position: fixed;
  z-index: 1000;
  top: 0;
  left: 50%;
  width: min(100%, 520px);
  height: 3px;
  pointer-events: none;
  transform: translateX(-50%);
}
.scroll-progress span {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan-strong), var(--cyan), var(--orange));
  transform: scaleX(0);
  transform-origin: left;
}

.mobile-header {
  position: fixed;
  z-index: 900;
  top: 0;
  left: 50%;
  width: min(100%, 520px);
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  padding: 0 20px;
  color: #fff;
  transform: translateX(-50%);
  transition: background 0.3s ease, border-color 0.3s ease;
  border-bottom: 1px solid transparent;
}
.mobile-header.is-scrolled {
  background: rgba(6, 19, 37, 0.92);
  border-color: rgba(255,255,255,0.1);
  backdrop-filter: blur(16px);
}
.brand, .footer-brand { display: flex; align-items: center; gap: 10px; }
.brand > span:last-child { display: grid; gap: 2px; }
.brand strong { font-size: 16px; letter-spacing: 0.03em; }
.brand small { color: rgba(255,255,255,0.5); font-size: 7px; letter-spacing: 0.12em; }
.brand-mark { position: relative; width: 32px; height: 32px; flex: 0 0 32px; border: 1px solid rgba(255,255,255,0.38); border-radius: 50%; }
.brand-mark i { position: absolute; width: 5px; height: 5px; border-radius: 50%; background: var(--cyan-strong); box-shadow: 0 0 9px rgba(36,200,216,0.8); }
.brand-mark i:nth-child(1) { left: 7px; top: 8px; }
.brand-mark i:nth-child(2) { right: 6px; top: 13px; background: var(--orange); }
.brand-mark i:nth-child(3) { left: 14px; bottom: 5px; width: 4px; height: 4px; }

.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 108px 20px 50px;
  overflow: hidden;
  color: #fff;
  background: radial-gradient(circle at 92% 30%, rgba(36,200,216,0.18), transparent 35%), var(--navy);
}
#mobile-canvas { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0.72; }
.hero::after { content: ""; position: absolute; inset: auto 0 0; height: 36%; background: linear-gradient(transparent, rgba(2,10,20,0.52)); pointer-events: none; }
.hero-orbit { position: absolute; border: 1px solid rgba(145,238,233,0.2); border-radius: 50%; pointer-events: none; animation: orbitFloat 7s ease-in-out infinite alternate; }
.orbit-a { width: 430px; height: 430px; right: -270px; top: 80px; }
.orbit-b { width: 300px; height: 300px; right: -160px; top: 145px; border-style: dashed; animation-delay: -2s; }
.hero-copy { position: relative; z-index: 2; }
.hero-kicker { display: flex; flex-wrap: wrap; align-items: center; gap: 9px; color: var(--cyan); font-size: 12px; font-weight: 750; line-height: 1.5; letter-spacing: 0.08em; }
.hero-kicker b { padding: 5px 8px; color: var(--navy); background: var(--orange); font-size: 11px; line-height: 1; letter-spacing: 0.04em; }
.eyebrow { color: var(--cyan); font-size: 12px; font-weight: 750; line-height: 1.5; letter-spacing: 0.13em; }
.eyebrow.dark { color: #188b9a; }
.hero h1 { margin-top: 23px; font-size: clamp(30px, 9.2vw, 40px); line-height: 1.12; letter-spacing: -0.055em; }
.hero h1 span { display: block; white-space: nowrap; }
.hero h1 span:nth-child(3) { margin-top: 8px; }
.hero h1 span:last-child { margin-top: 4px; color: var(--cyan); }
.hero-lead { max-width: 390px; margin-top: 25px; color: rgba(255,255,255,0.72); font-size: 17px; line-height: 1.82; }
.primary-button, .secondary-button {
  min-height: 54px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 30px;
  padding: 0 19px;
  color: var(--ink);
  background: var(--cyan);
  font-size: 15px;
  font-weight: 760;
  border-radius: 3px;
}
.primary-button b { font-size: 20px; }
.hero-facts { position: relative; z-index: 2; display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 46px; border-top: 1px solid rgba(255,255,255,0.18); border-bottom: 1px solid rgba(255,255,255,0.18); }
.hero-facts div { min-height: 92px; display: flex; flex-direction: column; justify-content: center; gap: 7px; padding: 12px 8px; border-right: 1px solid rgba(255,255,255,0.14); }
.hero-facts div:last-child { border-right: 0; }
.hero-facts strong { font-size: 16px; white-space: nowrap; }
.hero-facts span { color: rgba(255,255,255,0.53); font-size: 12px; line-height: 1.45; }

.section { position: relative; padding: 88px 20px; }
.paper-section, .power-section, .portfolio-section, .pricing-section { background: var(--paper); }
.system-section { background: linear-gradient(160deg, #edf4ef 0%, #f5f0e6 74%); }
.benefit-section, .annual-section, .admission-section { color: #fff; background: var(--navy); }
.section-title { margin-top: 17px; font-size: clamp(28px, 8.2vw, 36px); line-height: 1.24; letter-spacing: -0.045em; }
.section-title span { display: block; }
.light-title { color: #fff; }
.large-copy { margin-top: 25px; color: var(--muted); font-size: 17px; line-height: 1.82; }

.story-line { display: grid; grid-template-columns: auto 1fr auto 1fr auto; align-items: center; gap: 9px; margin-top: 38px; padding: 22px 0; border-top: 1px solid var(--line-light); border-bottom: 1px solid var(--line-light); }
.story-line span { font-size: 14px; font-weight: 720; white-space: nowrap; }
.story-line i { height: 1px; background: linear-gradient(90deg, var(--cyan-strong), var(--orange)); }
.decision-contrast { margin-top: 36px; border-top: 1px solid var(--line-light); }
.decision-contrast article { padding: 22px 0; border-bottom: 1px solid var(--line-light); }
.decision-contrast span { display: block; color: var(--muted); font-size: 12px; font-weight: 800; letter-spacing: 0.08em; }
.decision-contrast strong { display: block; margin-top: 9px; font-size: 16px; line-height: 1.62; }
.decision-contrast .muted-side strong { color: var(--muted); font-weight: 590; }
.decision-contrast .strong-side span { color: #188b9a; }
.decision-contrast .strong-side strong { color: var(--ink); font-size: 18px; }
.key-note { margin-top: 32px; padding-left: 17px; color: var(--muted); font-size: 16px; line-height: 1.8; border-left: 3px solid var(--orange); }
.key-note b { display: block; margin-bottom: 6px; color: var(--ink); font-size: 18px; }
.key-note span { display: block; }

.two-line-title { font-size: clamp(24px, 7.1vw, 32px); line-height: 1.3; letter-spacing: -0.055em; }
.two-line-title span { white-space: nowrap; }

.benefit-list { margin-top: 38px; border-top: 1px solid var(--line-dark); }
.mobile-cohort { margin-top: 34px; padding: 23px 20px; border: 1px solid rgba(145,238,233,0.36); background: rgba(145,238,233,0.07); }
.mobile-cohort strong { color: var(--cyan); font-size: 22px; line-height: 1.38; }
.mobile-cohort p { margin-top: 10px; color: rgba(255,255,255,0.7); font-size: 16px; line-height: 1.72; }
.mobile-cohort + .benefit-list { margin-top: 28px; }
.benefit-list article { display: grid; grid-template-columns: 38px 1fr; gap: 13px; padding: 25px 0; border-bottom: 1px solid var(--line-dark); }
.benefit-list article > b { color: var(--orange); font-size: 12px; padding-top: 4px; }
.benefit-list h3 { font-size: 21px; line-height: 1.35; }
.benefit-list p { margin-top: 9px; color: rgba(255,255,255,0.64); font-size: 16px; line-height: 1.72; }

.power-formula { display: flex; flex-wrap: nowrap; align-items: center; gap: 7px; margin-top: 35px; padding: 20px 0; white-space: nowrap; border-top: 1px solid var(--line-light); border-bottom: 1px solid var(--line-light); }
.power-formula strong { flex: 0 0 auto; color: #188b9a; font-size: clamp(18px, 5.1vw, 21px); }
.power-formula span { color: var(--orange); }
.power-formula em { min-width: 0; font-size: clamp(13px, 4vw, 16px); font-style: normal; font-weight: 700; letter-spacing: -0.02em; }
.power-formula i { color: var(--orange); font-style: normal; }
.power-grid { display: grid; grid-template-columns: 1fr 1fr; margin-top: 32px; border-top: 1px solid var(--line-light); border-left: 1px solid var(--line-light); }
.power-grid article { min-height: 225px; padding: 21px 17px; border-right: 1px solid var(--line-light); border-bottom: 1px solid var(--line-light); }
.power-grid b { color: #188b9a; font-size: 11px; }
.power-grid h3 { margin-top: 34px; font-size: 24px; }
.power-grid p { margin-top: 11px; color: var(--muted); font-size: 15px; line-height: 1.65; }

.annual-numbers { display: grid; grid-template-columns: 1fr 1fr; margin-top: 36px; border-top: 1px solid var(--line-dark); border-left: 1px solid var(--line-dark); }
.annual-numbers div { min-height: 122px; display: flex; flex-direction: column; justify-content: space-between; padding: 20px; border-right: 1px solid var(--line-dark); border-bottom: 1px solid var(--line-dark); }
.annual-numbers strong { color: var(--cyan); font-size: 31px; }
.annual-numbers span { color: rgba(255,255,255,0.6); font-size: 14px; }
.annual-loop { display: flex; align-items: center; justify-content: space-between; margin-top: 30px; padding: 19px 0; border-top: 1px solid var(--line-dark); border-bottom: 1px solid var(--line-dark); }
.annual-loop span { font-size: 15px; font-weight: 730; }
.annual-loop i { color: var(--orange); font-style: normal; }
.annual-copy { margin-top: 27px; color: rgba(255,255,255,0.68); font-size: 16px; line-height: 1.78; }
.long-term-note { margin-top: 28px; color: rgba(255,255,255,0.68); font-size: 15px; line-height: 1.78; }
.long-term-note b { display: block; color: var(--orange); font-size: 17px; }

.system-title { font-size: clamp(27px, 7.8vw, 34px); }
.system-shot { margin: 38px 0 0; overflow: hidden; border: 1px solid rgba(9,27,50,0.16); background: var(--navy); box-shadow: 0 24px 58px rgba(9,27,50,0.16); }
.system-shot-bar { min-height: 44px; display: flex; align-items: center; gap: 7px; padding: 0 14px; color: rgba(255,255,255,0.58); background: #061325; border-bottom: 1px solid rgba(255,255,255,0.12); }
.system-shot-bar i { width: 7px; height: 7px; border-radius: 50%; background: var(--cyan-strong); }
.system-shot-bar i:nth-child(2) { background: var(--orange); }
.system-shot-bar i:nth-child(3) { background: rgba(255,255,255,0.4); }
.system-shot-bar span { margin-left: 5px; font-size: 11px; letter-spacing: 0.08em; }
.system-shot-media { max-height: 530px; overflow: hidden; background: #0b2039; }
.system-shot-media img { width: 100%; height: auto; }
.system-shot figcaption { padding: 18px; color: rgba(255,255,255,0.68); font-size: 13px; line-height: 1.7; background: #081a31; }
.system-benefits { margin-top: 36px; border-top: 1px solid var(--line-light); }
.system-benefits article { display: grid; grid-template-columns: 88px 1fr; gap: 14px; padding: 22px 0; border-bottom: 1px solid var(--line-light); }
.system-benefits b { color: #188b9a; font-size: 17px; }
.system-benefits p { color: var(--muted); font-size: 15px; line-height: 1.68; }
.system-loop { display: flex; align-items: center; justify-content: space-between; margin-top: 30px; padding: 18px 0; border-top: 1px solid var(--line-light); border-bottom: 1px solid var(--line-light); }
.system-loop span { color: var(--ink); font-size: 13px; font-weight: 760; }
.system-loop i { color: var(--orange); font-size: 12px; font-style: normal; }
.system-proof { margin-top: 27px; color: var(--ink); font-size: 17px; font-weight: 680; line-height: 1.75; }

.version-track { display: grid; grid-template-columns: auto 1fr auto 1fr auto 1fr auto; align-items: center; gap: 8px; margin-top: 34px; padding: 20px 0; border-top: 1px solid var(--line-light); border-bottom: 1px solid var(--line-light); }
.version-track span { font-size: 13px; font-weight: 720; white-space: nowrap; }
.version-track i { height: 1px; background: linear-gradient(90deg, var(--cyan-strong), var(--orange)); }
.portfolio-use { margin-top: 34px; }
.portfolio-use article { display: grid; grid-template-columns: 90px 1fr; gap: 15px; padding: 23px 0; border-bottom: 1px solid var(--line-light); }
.portfolio-use b { color: #188b9a; font-size: 18px; }
.portfolio-use p { color: var(--muted); font-size: 15px; line-height: 1.68; }
.portfolio-proof { margin-top: 30px; padding: 22px 0; color: var(--ink); font-size: 17px; font-weight: 680; line-height: 1.75; border-top: 1px solid var(--line-light); border-bottom: 1px solid var(--line-light); }

.fit-list { margin: 34px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--line-dark); }
.fit-list li { position: relative; padding: 20px 0 20px 30px; color: rgba(255,255,255,0.77); font-size: 16px; line-height: 1.62; border-bottom: 1px solid var(--line-dark); }
.fit-list li::before { content: "✓"; position: absolute; left: 1px; color: var(--cyan); font-weight: 800; }
.unfit-note { margin-top: 30px; padding: 0 0 28px; border-bottom: 1px solid var(--line-dark); }
.unfit-note span { color: rgba(255,255,255,0.55); font-size: 13px; font-weight: 800; letter-spacing: 0.08em; }
.unfit-note p { margin-top: 10px; color: rgba(255,255,255,0.66); font-size: 15px; line-height: 1.72; }
.admission-note { margin-top: 34px; padding: 24px 20px; border: 1px solid rgba(255,147,77,0.48); background: rgba(255,147,77,0.08); }
.admission-note span { color: var(--orange); font-size: 13px; font-weight: 800; letter-spacing: 0.08em; }
.admission-note p { margin-top: 11px; color: rgba(255,255,255,0.76); font-size: 16px; line-height: 1.75; }

.price-tabs { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 34px; border: 1px solid var(--line-light); }
.price-tabs button { min-height: 50px; padding: 0 4px; color: var(--muted); background: transparent; border: 0; border-right: 1px solid var(--line-light); font-size: 15px; font-weight: 700; }
.price-tabs button:last-child { border-right: 0; }
.price-tabs button.is-active { color: var(--ink); background: var(--cyan); }
.price-tabs button:focus-visible { position: relative; z-index: 1; outline: 2px solid var(--ink); outline-offset: -3px; }
.price-panels { min-height: 475px; }
.price-panel { padding: 30px 0 4px; }
.price-panel[hidden] { display: none !important; }
.price-panel.is-active { animation: pricePanelEnter .32s var(--ease); }
.price-panel > p { color: #188b9a; font-size: 14px; font-weight: 750; }
.price { display: flex; align-items: baseline; gap: 6px; margin-top: 10px; }
.price sup { font-size: 18px; }
.price strong { font-size: 52px; letter-spacing: -0.055em; }
.price span { color: var(--muted); font-size: 13px; }
.price-panel h3 { max-width: none; margin-top: 19px; color: var(--muted); font-size: 16px; font-weight: 500; line-height: 1.72; text-wrap: wrap; }
.price-panel ul { margin: 25px 0 0; padding: 18px 0 0; list-style: none; border-top: 1px solid var(--line-light); }
.price-panel li { position: relative; padding: 9px 0 9px 24px; font-size: 15px; line-height: 1.55; }
.price-panel li::before { content: "✓"; position: absolute; left: 0; color: #188b9a; font-weight: 800; }
.secondary-button { justify-content: center; margin-top: 24px; }

.closing-section { background: var(--paper); }
.closing-copy { padding: 84px 20px 48px; }
.closing-copy h2 { margin-top: 18px; color: var(--ink); font-size: clamp(27px, 7.8vw, 34px); line-height: 1.32; letter-spacing: -0.045em; }
.closing-copy h2 span { display: block; }
.closing-copy > p:last-child { margin-top: 20px; color: var(--muted); font-size: 16px; line-height: 1.75; }
.closing-section > img { width: 100%; min-height: 225px; object-fit: cover; object-position: center; }

footer { min-height: 150px; display: flex; align-items: flex-start; justify-content: space-between; padding: 32px 20px 82px; color: #fff; background: #020b16; }
.footer-brand strong { align-self: center; font-size: 16px; }
footer > a { padding-top: 9px; color: var(--cyan); font-size: 13px; }
.sticky-action { position: fixed; z-index: 850; left: 50%; bottom: max(12px, env(safe-area-inset-bottom)); width: min(calc(100% - 28px), 492px); min-height: 56px; display: flex; align-items: center; justify-content: space-between; padding: 0 19px; color: var(--ink); background: var(--cyan); font-size: 15px; font-weight: 800; box-shadow: 0 15px 36px rgba(0,0,0,0.28); transform: translateX(-50%) translateY(0); transition: opacity .3s ease, transform .3s var(--ease); }
.sticky-action.is-hidden { opacity: 0; transform: translateX(-50%) translateY(80px); pointer-events: none; }

.reveal { opacity: 1; transform: none; }
.js .reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.js .reveal.is-visible { opacity: 1; transform: none; }

@keyframes orbitFloat { to { transform: translate3d(-18px, 12px, 0) rotate(6deg); } }
@keyframes pricePanelEnter { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

@media (max-width: 350px) {
  .hero, .section { padding-left: 16px; padding-right: 16px; }
  .hero h1 { font-size: 29px; }
  .section-title { font-size: 27px; }
  .two-line-title { font-size: 23px; }
  .hero-facts strong { font-size: 14px; }
  .hero-facts span { font-size: 11px; }
  .power-grid article { padding-inline: 13px; }
  .power-grid p { font-size: 14px; }
  .power-formula { gap: 5px; }
  .power-formula strong { font-size: 17px; }
  .power-formula em { font-size: 12px; }
  .system-loop span { font-size: 12px; }
  .price strong { font-size: 48px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}