:root {
  --ink: #0a0b0d;
  --ink-soft: #17191d;
  --paper: #f2f1ec;
  --white: #ffffff;
  --line: #c9c8c2;
  --muted: #666862;
  --blue: #1d5bff;
  --red: #d83b2d;
  --header-height: 74px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  letter-spacing: 0;
  overflow-x: hidden;
}
body.menu-open { overflow: hidden; }
button, input, select, textarea { font: inherit; letter-spacing: 0; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, a { -webkit-tap-highlight-color: transparent; }

.skip-link {
  position: fixed;
  top: -60px;
  left: 16px;
  z-index: 200;
  background: var(--white);
  color: var(--ink);
  padding: 10px 16px;
}
.skip-link:focus { top: 12px; }

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: 100;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 4.5vw;
  color: var(--white);
  border-bottom: 1px solid rgba(255,255,255,.22);
  transition: background .3s ease, height .3s ease, color .3s ease, box-shadow .3s ease;
}
.site-header.scrolled {
  height: 64px;
  background: rgba(242,241,236,.96);
  color: var(--ink);
  border-bottom-color: rgba(10,11,13,.14);
  box-shadow: 0 8px 24px rgba(0,0,0,.05);
}
.brand { display: flex; align-items: center; gap: 10px; width: fit-content; }
.brand-mark { display: flex; width: 25px; height: 26px; align-items: flex-end; gap: 3px; }
.brand-mark span { display: block; width: 10px; background: currentColor; transform: skewY(-22deg); }
.brand-mark span:first-child { height: 17px; }
.brand-mark span:last-child { height: 26px; background: var(--blue); }
.brand-name { font-weight: 700; font-size: 17px; line-height: 1; }
.brand-en { font-family: Arial, sans-serif; font-size: 9px; line-height: 1; opacity: .6; }
.desktop-nav { display: flex; align-items: center; gap: 32px; }
.desktop-nav a { position: relative; font-size: 13px; }
.desktop-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -8px;
  width: 0;
  height: 2px;
  background: var(--blue);
  transition: width .25s ease;
}
.desktop-nav a:hover::after, .desktop-nav a:focus-visible::after { width: 100%; }
.header-cta { justify-self: end; display: inline-flex; align-items: center; gap: 7px; font-size: 13px; font-weight: 700; }
.header-cta svg { width: 16px; height: 16px; }
.menu-toggle { display: none; justify-self: end; border: 0; background: none; color: inherit; width: 42px; height: 42px; align-items: center; justify-content: center; cursor: pointer; }
.mobile-menu { position: absolute; top: 100%; left: 0; right: 0; padding: 28px 5vw 36px; background: var(--paper); color: var(--ink); border-bottom: 1px solid var(--line); }
.mobile-menu a { display: block; padding: 12px 0; font-size: 20px; border-bottom: 1px solid var(--line); }

.hero {
  position: relative;
  min-height: 760px;
  height: calc(100vh - 24px);
  max-height: 940px;
  color: var(--white);
  background: var(--ink) url("assets/cinema-hero.jpg") center 62% / cover no-repeat;
  overflow: hidden;
}
.hero-shade { position: absolute; inset: 0; background: rgba(0,0,0,.46); }
.hero-content {
  position: relative;
  z-index: 2;
  height: 100%;
  width: min(1180px, 91vw);
  margin: 0 auto;
  padding: 145px 0 56px;
  display: flex;
  flex-direction: column;
}
.hero-frame { position: absolute; z-index: 2; inset: 92px 4.5vw 40px; border: 1px solid rgba(255,255,255,.23); pointer-events: none; }
.hero-frame > span { position: absolute; font: 10px/1 Arial, sans-serif; opacity: .72; }
.hero-frame > span:first-child { top: 12px; left: 14px; }
.hero-frame > span:nth-child(2) { top: 12px; right: 14px; }
.hero-frame > span:nth-child(3) { bottom: 14px; right: 14px; display: flex; align-items: center; gap: 6px; }
.hero-frame b { display: inline-block; width: 6px; height: 6px; background: var(--red); border-radius: 50%; animation: blink 1.6s infinite; }
@keyframes blink { 50% { opacity: .25; } }
.eyebrow { display: flex; align-items: center; gap: 11px; margin: 0 0 20px; color: var(--muted); font-size: 12px; font-weight: 700; text-transform: uppercase; }
.eyebrow span { width: 26px; height: 2px; background: var(--blue); }
.eyebrow.light { color: rgba(255,255,255,.72); }
.hero h1 { margin: 0 0 18px; font-size: 18px; font-weight: 600; }
.hero-statement { margin: 0; font-size: 68px; line-height: 1.12; font-weight: 700; }
.hero-bottom { margin-top: auto; display: flex; align-items: flex-end; justify-content: space-between; gap: 40px; padding: 0 40px; }
.hero-bottom > p { margin: 0; font-size: 14px; color: rgba(255,255,255,.78); }
.primary-button {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 24px;
  min-height: 54px;
  padding: 0 20px;
  background: var(--white);
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
  transition: background .25s ease, color .25s ease;
}
.primary-button:hover { background: var(--blue); color: var(--white); }
.primary-button svg { width: 17px; height: 17px; }
.hero-side-note { position: absolute; z-index: 2; right: 12px; top: 50%; transform: translateY(-50%); writing-mode: vertical-rl; font: 9px/1 Arial, sans-serif; color: rgba(255,255,255,.52); }

.signal-strip { height: 58px; overflow: hidden; background: var(--blue); color: var(--white); }
.signal-track { width: max-content; height: 100%; display: flex; align-items: center; gap: 26px; animation: marquee 24s linear infinite; }
.signal-track span { font-size: 14px; font-weight: 700; white-space: nowrap; }
.signal-track i { width: 5px; height: 5px; background: var(--white); transform: rotate(45deg); }
@keyframes marquee { to { transform: translateX(-50%); } }

.section { padding: 116px max(4.5vw, 32px); }
.section-label { display: flex; align-items: center; gap: 16px; margin-bottom: 72px; }
.section-label > span { display: grid; place-items: center; width: 34px; height: 34px; border: 1px solid currentColor; font: 10px/1 Arial, sans-serif; }
.section-label p { margin: 0; color: var(--muted); font: 11px/1 Arial, sans-serif; }
.section-label.light { color: var(--white); }
.section-label.light p { color: rgba(255,255,255,.55); }
.intro { background: var(--paper); }
.intro-grid { display: grid; grid-template-columns: 1.35fr .65fr; gap: 9vw; align-items: end; }
.intro h2 { margin: 0; font-size: 48px; line-height: 1.28; font-weight: 700; }
.intro h2 em { color: var(--blue); font-style: normal; }
.intro-copy { max-width: 500px; }
.intro-copy p { margin: 0 0 18px; color: #4c4e4a; font-size: 16px; }
.strategist-band { position: relative; display: grid; grid-template-columns: .8fr 1.2fr; min-height: 210px; margin-top: 76px; border-top: 1px solid var(--ink); border-bottom: 1px solid var(--line); }
.strategist-heading { display: flex; flex-direction: column; justify-content: center; padding: 34px 48px 34px 0; border-right: 1px solid var(--line); }
.strategist-heading > p { display: flex; align-items: center; gap: 14px; margin: 0 0 20px; color: var(--muted); font-size: 11px; }
.strategist-heading > p span { color: var(--blue); font: 10px/1 Arial, sans-serif; }
.strategist-heading h3 { margin: 0; font-size: 30px; line-height: 1.3; }
.strategist-heading h3 em { color: var(--blue); font-style: normal; }
.strategist-points { display: grid; grid-template-columns: repeat(2, 1fr); }
.strategist-points > div { display: flex; align-items: center; gap: 18px; padding: 34px; border-right: 1px solid var(--line); }
.strategist-points > div:last-child { border-right: 0; }
.strategist-points svg { flex: 0 0 auto; width: 25px; height: 25px; color: var(--blue); }
.strategist-points p { margin: 0; }
.strategist-points strong, .strategist-points span { display: block; }
.strategist-points strong { margin-bottom: 7px; font-size: 16px; }
.strategist-points span { color: var(--muted); font-size: 12px; line-height: 1.7; }
.belief-row { margin-top: 48px; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.belief-row > div { min-height: 128px; display: flex; flex-direction: column; justify-content: center; padding: 0 28px; border-right: 1px solid var(--line); }
.belief-row > div:first-child { padding-left: 0; }
.belief-row > div:last-child { border-right: 0; }
.belief-row strong { font-size: 24px; }
.belief-row span { color: var(--muted); font-size: 13px; }

.services { background: var(--white); }
.section-heading { display: grid; grid-template-columns: 1fr 360px; gap: 80px; align-items: end; margin-bottom: 74px; }
.section-heading h2 { margin: 0; font-size: 52px; line-height: 1.2; }
.section-heading p { margin: 0 0 6px; color: var(--muted); }
.service-list { border-top: 1px solid var(--ink); }
.service-item { display: grid; grid-template-columns: 90px minmax(250px, .8fr) 1.2fr; gap: 42px; padding: 58px 0 64px; border-bottom: 1px solid var(--line); }
.service-number { font: 12px/1 Arial, sans-serif; color: var(--blue); }
.service-title span { font: 10px/1.2 Arial, sans-serif; color: var(--muted); }
.service-title h3 { margin: 14px 0 0; font-size: 34px; }
.service-copy > p { max-width: 620px; margin: 0 0 28px; color: #4d4f4a; }
.service-copy ul { display: flex; flex-wrap: wrap; gap: 14px 30px; margin: 0; padding: 0; list-style: none; }
.service-copy li { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 700; }
.service-copy li svg { width: 17px; color: var(--blue); }

.method { position: relative; min-height: 780px; padding: 116px max(4.5vw, 32px); background: var(--ink); color: var(--white); overflow: hidden; }
.method-inner { position: relative; z-index: 1; }
.method-top { display: grid; grid-template-columns: 1fr 420px; gap: 80px; align-items: end; }
.method-heading h2 { margin: 0; font-size: 58px; line-height: 1.15; }
.method-description { margin: 0 0 4px; color: rgba(255,255,255,.62); }
.method-steps { position: relative; z-index: 2; display: grid; grid-template-columns: repeat(5, 1fr); margin: 90px 0 0; padding: 0; list-style: none; border-top: 1px solid rgba(255,255,255,.28); }
.method-steps li { min-height: 150px; padding: 22px 18px; border-right: 1px solid rgba(255,255,255,.16); }
.method-steps li:first-child { padding-left: 0; }
.method-steps li:last-child { border-right: 0; }
.method-steps span { display: block; margin-bottom: 26px; color: var(--red); font: 11px/1 Arial, sans-serif; }
.method-steps strong { display: block; font-size: 18px; }
.method-steps p { margin: 3px 0 0; color: rgba(255,255,255,.48); font-size: 12px; }
.propagation { position: absolute; right: -11vw; bottom: -150px; width: 620px; height: 300px; opacity: .28; transform: rotate(-10deg); }
.propagation-line { position: absolute; top: 135px; left: 0; width: 100%; height: 1px; background: var(--blue); }
.node { position: absolute; display: block; border: 1px solid var(--blue); border-radius: 50%; }
.node::after { content: ""; position: absolute; inset: 50%; width: 5px; height: 5px; background: var(--blue); border-radius: 50%; transform: translate(-50%,-50%); }
.node-a { width: 70px; height: 70px; top: 101px; left: 30px; }
.node-b { width: 110px; height: 110px; top: 80px; left: 155px; }
.node-c { width: 42px; height: 42px; top: 115px; left: 325px; }
.node-d { width: 150px; height: 150px; top: 60px; right: 45px; }
.node-e { width: 25px; height: 25px; top: 124px; right: 0; }
.propagation p { position: absolute; right: 45px; bottom: 20px; font: 9px/1 Arial, sans-serif; }

.principles { background: var(--paper); }
.principles-grid { display: grid; grid-template-columns: minmax(360px, .9fr) 1.1fr; gap: 8vw; align-items: center; }
.camera-visual { position: relative; margin: 0; aspect-ratio: 4 / 5; overflow: hidden; background: var(--ink-soft); }
.camera-visual img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(1) contrast(1.08); transition: filter .5s ease, transform .7s ease; }
.camera-visual:hover img { filter: grayscale(.2); transform: scale(1.025); }
.camera-visual::after { content: ""; position: absolute; inset: 14px; border: 1px solid rgba(255,255,255,.42); pointer-events: none; }
.camera-visual figcaption { position: absolute; z-index: 1; left: 28px; right: 28px; bottom: 24px; display: flex; justify-content: space-between; color: var(--white); font: 9px/1 Arial, sans-serif; }
.principles-copy h2 { margin: 0 0 30px; font-size: 54px; line-height: 1.15; }
.principles-copy .lead { max-width: 580px; margin: 0 0 50px; color: var(--muted); }
.principle-lines { border-top: 1px solid var(--ink); }
.principle-lines > div { display: grid; grid-template-columns: 46px 1fr 1.1fr; gap: 18px; align-items: center; min-height: 92px; border-bottom: 1px solid var(--line); }
.principle-lines span { font: 10px/1 Arial, sans-serif; color: var(--blue); }
.principle-lines strong { font-size: 15px; }
.principle-lines p { margin: 0; color: var(--muted); font-size: 12px; }

.outcome-band { display: flex; min-height: 96px; align-items: center; justify-content: center; gap: 32px; padding: 24px 4.5vw; background: var(--red); color: var(--white); }
.outcome-band p { margin: 0; font-size: 16px; font-weight: 700; text-align: center; }
.outcome-band svg { width: 19px; flex: 0 0 auto; }

.contact { display: grid; grid-template-columns: 1fr 1fr; gap: 9vw; background: var(--ink); color: var(--white); }
.contact-intro h2 { margin: 0 0 28px; font-size: 54px; line-height: 1.16; }
.contact-intro > p:last-child { max-width: 480px; margin: 0; color: rgba(255,255,255,.58); }
.brief-form { display: flex; flex-direction: column; gap: 22px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.brief-form label { display: flex; flex-direction: column; gap: 8px; color: rgba(255,255,255,.65); font-size: 12px; }
.brief-form input, .brief-form select, .brief-form textarea {
  width: 100%;
  color: var(--white);
  background: transparent;
  border: 0;
  border-bottom: 1px solid rgba(255,255,255,.32);
  border-radius: 0;
  outline: none;
  padding: 11px 0 13px;
  resize: vertical;
}
.brief-form select { color-scheme: dark; }
.brief-form input:focus, .brief-form select:focus, .brief-form textarea:focus { border-bottom-color: var(--blue); }
.brief-form input::placeholder, .brief-form textarea::placeholder { color: rgba(255,255,255,.32); }
.submit-button { display: flex; align-items: center; justify-content: space-between; min-height: 58px; margin-top: 4px; padding: 0 18px; border: 0; background: var(--blue); color: var(--white); font-size: 14px; font-weight: 700; cursor: pointer; transition: background .2s ease; }
.submit-button:hover { background: #0b49dd; }
.submit-button svg { width: 18px; }
.form-note { display: flex; align-items: center; gap: 7px; margin: -10px 0 0; color: rgba(255,255,255,.4); font-size: 10px; }
.form-note svg { width: 13px; }

.site-footer { padding: 54px 4.5vw 28px; background: #050506; color: var(--white); }
.footer-brand { display: flex; align-items: center; gap: 14px; }
.footer-brand strong { font-size: 16px; }
.footer-brand p { margin: 2px 0 0; color: rgba(255,255,255,.4); font: 9px/1 Arial, sans-serif; }
.footer-line { margin: 36px 0 54px; font-size: 28px; font-weight: 700; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: 18px; border-top: 1px solid rgba(255,255,255,.16); color: rgba(255,255,255,.4); font-size: 11px; }
.footer-bottom a { display: flex; align-items: center; gap: 6px; color: rgba(255,255,255,.72); }
.footer-bottom svg { width: 14px; }
.toast { position: fixed; z-index: 300; left: 50%; bottom: 28px; transform: translate(-50%, 20px); max-width: calc(100vw - 32px); padding: 12px 18px; background: var(--white); color: var(--ink); box-shadow: 0 14px 45px rgba(0,0,0,.24); font-size: 13px; opacity: 0; visibility: hidden; transition: all .25s ease; }
.toast.show { opacity: 1; visibility: visible; transform: translate(-50%, 0); }

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

@media (max-width: 980px) {
  .site-header { grid-template-columns: 1fr auto; padding: 0 24px; }
  .desktop-nav, .header-cta { display: none; }
  .menu-toggle { display: inline-flex; }
  .hero-frame { inset-inline: 24px; }
  .hero-content { width: calc(100% - 48px); }
  .hero-statement { font-size: 58px; }
  .hero-bottom { padding: 0 24px; }
  .intro-grid, .section-heading, .method-top, .contact { grid-template-columns: 1fr; }
  .intro-grid, .method-top, .contact { gap: 48px; }
  .section-heading { gap: 24px; }
  .section-heading p { max-width: 520px; }
  .service-item { grid-template-columns: 60px 230px 1fr; gap: 24px; }
  .method-steps { grid-template-columns: repeat(3, 1fr); }
  .method-steps li:nth-child(3) { border-right: 0; }
  .method-steps li:nth-child(n+4) { border-top: 1px solid rgba(255,255,255,.16); }
  .principles-grid { gap: 5vw; }
  .principle-lines > div { grid-template-columns: 36px 1fr; padding: 16px 0; }
  .principle-lines p { grid-column: 2; }
}

@media (max-width: 720px) {
  :root { --header-height: 64px; }
  .brand-en { display: none; }
  .hero { min-height: 700px; height: calc(100svh - 12px); max-height: 820px; background-position: center 58%; }
  .hero-frame { inset: 80px 16px 24px; }
  .hero-content { width: calc(100% - 40px); padding: 116px 0 42px; }
  .hero h1 { font-size: 16px; }
  .hero-statement { font-size: 43px; line-height: 1.18; }
  .hero-bottom { align-items: flex-start; flex-direction: column; gap: 24px; padding: 0 10px; }
  .hero-bottom > p br { display: none; }
  .primary-button { min-height: 50px; width: 100%; justify-content: space-between; }
  .hero-side-note { display: none; }
  .section, .method { padding: 82px 20px; }
  .section-label { margin-bottom: 48px; }
  .intro h2, .section-heading h2 { font-size: 34px; }
  .intro-copy p { font-size: 15px; }
  .strategist-band { grid-template-columns: 1fr; min-height: 0; margin-top: 56px; }
  .strategist-heading { padding: 30px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .strategist-heading h3 { font-size: 27px; }
  .strategist-points { grid-template-columns: 1fr; }
  .strategist-points > div { padding: 26px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .strategist-points > div:last-child { border-bottom: 0; }
  .belief-row { grid-template-columns: 1fr; margin-top: 56px; }
  .belief-row > div, .belief-row > div:first-child { min-height: 92px; padding: 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .belief-row > div:last-child { border-bottom: 0; }
  .service-item { grid-template-columns: 40px 1fr; gap: 16px; padding: 38px 0 44px; }
  .service-copy { grid-column: 2; }
  .service-title h3 { font-size: 28px; }
  .service-copy ul { flex-direction: column; gap: 10px; }
  .method-heading h2, .principles-copy h2, .contact-intro h2 { font-size: 40px; }
  .method-description { font-size: 14px; }
  .method-steps { grid-template-columns: 1fr; margin-top: 62px; border-top: 1px solid rgba(255,255,255,.28); }
  .method-steps li, .method-steps li:first-child { min-height: 88px; display: grid; grid-template-columns: 40px 1fr; align-content: center; padding: 15px 0; border-right: 0; border-bottom: 1px solid rgba(255,255,255,.16); }
  .method-steps li:nth-child(n+4) { border-top: 0; }
  .method-steps span { grid-row: 1 / 3; margin: 7px 0 0; }
  .method-steps p { grid-column: 2; }
  .propagation { display: none; }
  .principles-grid { grid-template-columns: 1fr; gap: 54px; }
  .camera-visual { aspect-ratio: 4 / 4.6; }
  .principles-copy .lead { margin-bottom: 36px; }
  .outcome-band { flex-direction: column; gap: 12px; padding: 34px 20px; }
  .outcome-band svg { transform: rotate(90deg); }
  .field-row { grid-template-columns: 1fr; }
  .footer-line { margin: 32px 0 44px; font-size: 22px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}