:root {
  --peach: #ef755b;
  --peach-deep: #bd4f3d;
  --navy: #102b46;
  --navy-deep: #081b2c;
  --silver: #bbc2c7;
  --ivory: #f3eee4;
  --white: #fffdfa;
  --graphite: #252b31;
  --muted: #66717b;
  --line: rgba(16, 43, 70, .2);
  --max: 1600px;
  --sans: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --serif: "Songti SC", "STSong", "Noto Serif CJK SC", serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; }
body { margin: 0; background: var(--white); color: var(--graphite); font-family: var(--sans); line-height: 1.75; }
img { display: block; max-width: 100%; }
button, a, summary { -webkit-tap-highlight-color: transparent; }
a { color: inherit; }
.skip-link { position: fixed; z-index: 1000; top: 12px; left: 12px; padding: 10px 16px; transform: translateY(-150%); background: var(--navy); color: #fff; text-decoration: none; }
.skip-link:focus { transform: translateY(0); }
:focus-visible { outline: 3px solid var(--peach); outline-offset: 4px; }

.site-header { position: sticky; z-index: 100; top: 0; background: rgba(255, 253, 250, .96); border-bottom: 1px solid var(--line); backdrop-filter: blur(14px); }
.header-shell { max-width: var(--max); min-height: 84px; margin: auto; padding: 0 34px; display: flex; align-items: center; }
.brand-lockup { min-width: 250px; display: flex; align-items: center; gap: 13px; }
.brand-lockup img { width: 46px; height: 46px; object-fit: contain; }
.brand-lockup span { display: grid; line-height: 1.15; }
.brand-lockup strong { color: var(--navy); font: 600 24px var(--serif); letter-spacing: .08em; }
.brand-lockup small { margin-top: 6px; color: var(--peach-deep); font-size: 8px; letter-spacing: .26em; }
.header-note { margin: 0 36px 0 0; color: var(--muted); font-size: 11px; letter-spacing: .1em; white-space: nowrap; }
.primary-nav { margin-left: auto; display: flex; align-items: center; gap: 28px; }
.primary-nav a { position: relative; padding: 29px 0 25px; color: var(--navy); font-size: 13px; font-weight: 600; text-decoration: none; }
.primary-nav a::after { content: ""; position: absolute; right: 0; bottom: 19px; left: 0; height: 2px; transform: scaleX(0); transform-origin: left; background: var(--peach); transition: transform .22s ease; }
.primary-nav a:hover::after, .primary-nav a:focus-visible::after, .primary-nav a.is-active::after { transform: scaleX(1); }
.primary-nav a.is-active { color: var(--peach-deep); }
.menu-toggle { display: none; margin-left: auto; border: 0; background: none; color: var(--navy); cursor: pointer; }
.menu-toggle span { font-size: 12px; }
.menu-toggle i, .menu-toggle i::before, .menu-toggle i::after { display: block; width: 26px; height: 1px; background: currentColor; }
.menu-toggle i { position: relative; margin: 8px 0 0 auto; }
.menu-toggle i::before, .menu-toggle i::after { content: ""; position: absolute; right: 0; }
.menu-toggle i::before { top: -7px; }
.menu-toggle i::after { top: 7px; }

.signal-hero { position: relative; max-width: var(--max); min-height: 790px; margin: 0 auto; overflow: hidden; background: var(--navy-deep); color: #fff; }
.hero-panorama { position: absolute; inset: 0; }
.hero-panorama::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(8,27,44,.98) 0%, rgba(8,27,44,.84) 36%, rgba(8,27,44,.22) 72%, rgba(8,27,44,.62) 100%); }
.hero-panorama img { width: 100%; height: 100%; object-fit: cover; filter: contrast(.92); }
.vertical-brand { position: absolute; z-index: 3; top: 0; bottom: 0; left: 0; width: 86px; border-right: 1px solid rgba(255,255,255,.22); display: grid; place-items: center; }
.vertical-brand span { writing-mode: vertical-rl; color: var(--peach); font: 500 34px var(--serif); letter-spacing: .22em; }
.hero-copy { position: relative; z-index: 2; width: min(910px, 68%); padding: 150px 70px 40px 155px; }
.eyebrow { margin: 0 0 16px; color: var(--peach-deep); font-size: 10px; font-weight: 800; letter-spacing: .24em; text-transform: uppercase; }
.signal-hero .eyebrow { color: #ffb29e; }
.hero-copy h1 { max-width: 880px; margin: 0; font: 500 clamp(58px, 6.2vw, 105px)/1.08 var(--serif); letter-spacing: -.055em; }
.hero-lead { max-width: 580px; margin: 34px 0 0; color: rgba(255,255,255,.82); font: 400 23px/1.7 var(--serif); }
.hero-summary { position: absolute; z-index: 3; right: 45px; bottom: 116px; width: 360px; padding: 28px 30px; background: rgba(243,238,228,.94); color: var(--navy); border-top: 5px solid var(--peach); }
.hero-summary p { margin: 0; font-size: 13px; }
.hero-summary p + p { margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--line); }
.hero-ruler { position: absolute; z-index: 4; right: 0; bottom: 0; left: 86px; min-height: 74px; padding: 0 45px; display: grid; grid-template-columns: repeat(6, 1fr); align-items: center; background: rgba(255,253,250,.97); color: var(--navy); border-top: 1px solid rgba(255,255,255,.25); }
.hero-ruler span { padding: 9px 14px; border-left: 1px solid var(--line); font-size: 11px; text-align: center; }
.hero-ruler span:last-child { border-right: 1px solid var(--line); }

.section-shell { max-width: var(--max); margin: auto; padding: 125px 42px; }
.section-label { padding-top: 12px; border-top: 1px solid var(--navy); display: flex; justify-content: space-between; color: var(--navy); }
.section-label span { font: 500 30px var(--serif); }
.section-label b { color: var(--peach-deep); font-size: 9px; letter-spacing: .22em; }
.section-label.light { border-color: rgba(255,255,255,.45); color: #fff; }
.section-label.light b { color: #ffad99; }

.platform-position { display: grid; grid-template-columns: 120px minmax(300px,.9fr) minmax(400px,1.1fr); gap: 70px; }
.position-heading h2, .content-overview h2, .discovery h2, .theme-stream h2, .attention h2, .briefing h2, .access-hub h2, .faq h2, .source-note h2, .brand-profile h2 { margin: 0; color: var(--navy); font: 500 clamp(42px,4.4vw,70px)/1.18 var(--serif); letter-spacing: -.04em; }
.position-copy { padding-top: 34px; border-top: 1px solid var(--line); }
.position-copy p { margin: 0; color: #4d5962; font-size: 16px; }
.position-copy p + p { margin-top: 22px; }

.content-overview { background: var(--ivory); }
.overview-shell { max-width: var(--max); margin: auto; padding: 105px 42px; display: grid; grid-template-columns: .7fr 1.3fr; gap: 90px; }
.content-overview header > p:last-child { max-width: 520px; color: var(--muted); }
.overview-lines { border-top: 1px solid var(--navy); }
.overview-lines article { min-height: 118px; padding: 20px 0; border-bottom: 1px solid var(--line); display: grid; grid-template-columns: 55px 180px 1fr; align-items: baseline; gap: 18px; }
.overview-lines article span { color: var(--peach-deep); font: 500 21px var(--serif); }
.overview-lines h3 { margin: 0; color: var(--navy); font: 500 23px var(--serif); }
.overview-lines p { margin: 0; color: var(--muted); font-size: 14px; }

.discovery { display: grid; grid-template-columns: 105px minmax(280px,.75fr) minmax(380px,1.15fr); gap: 56px; }
.discovery-heading { grid-column: 2 / 4; display: grid; grid-template-columns: 1fr .75fr; column-gap: 70px; align-items: end; }
.discovery-heading .eyebrow { grid-column: 1 / 3; }
.discovery-heading > p:last-child { margin: 0; color: var(--muted); }
.discovery-visual { grid-column: 2; margin-top: 35px; }
.discovery-visual img { width: 100%; aspect-ratio: 3/2; object-fit: cover; }
.discovery-visual p { margin: 12px 0 0; color: var(--muted); font-size: 11px; }
.directory-list { grid-column: 3; margin-top: 35px; border-top: 1px solid var(--navy); }
.directory-list article { padding: 23px 0; border-bottom: 1px solid var(--line); display: grid; grid-template-columns: 115px 220px 1fr; gap: 20px; }
.directory-list span { color: var(--peach-deep); font-size: 10px; font-weight: 700; }
.directory-list h3 { margin: 0; color: var(--navy); font: 500 20px var(--serif); }
.directory-list p { margin: 0; color: var(--muted); font-size: 13px; }

.theme-stream { background: var(--navy-deep); color: #fff; }
.theme-shell { max-width: var(--max); margin: auto; padding: 120px 42px; }
.theme-stream header { display: grid; grid-template-columns: 105px 1fr 1fr; gap: 56px; align-items: end; }
.theme-stream header .section-label { grid-row: 1 / 4; }
.theme-stream header .eyebrow { grid-column: 2 / 4; }
.theme-stream h2 { color: #fff; }
.theme-stream header > p:last-child { margin: 0; color: rgba(255,255,255,.62); }
.theme-stage { margin-top: 70px; display: grid; grid-template-columns: .82fr 1.18fr; gap: 0; }
.theme-image { min-height: 680px; }
.theme-image img { width: 100%; height: 100%; object-fit: cover; }
.theme-list { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid rgba(255,255,255,.28); border-right: 1px solid rgba(255,255,255,.28); }
.theme-list article { min-height: 225px; padding: 30px; border-bottom: 1px solid rgba(255,255,255,.28); border-left: 1px solid rgba(255,255,255,.28); }
.theme-list span { color: #ffad99; font-size: 11px; }
.theme-list h3 { margin: 38px 0 8px; font: 500 27px var(--serif); }
.theme-list p { margin: 0; color: rgba(255,255,255,.62); font-size: 13px; }

.attention { display: grid; grid-template-columns: 105px .75fr 1.25fr; gap: 56px; }
.attention-copy { padding-top: 26px; border-top: 1px solid var(--line); column-count: 2; column-gap: 40px; }
.attention-copy p { margin: 0; color: var(--muted); }

.briefing { background: #e5e7e7; }
.briefing-shell { max-width: var(--max); margin: auto; padding: 105px 42px; }
.briefing header { display: grid; grid-template-columns: 1fr auto; align-items: end; }
.briefing header .eyebrow { grid-column: 1 / 3; }
.briefing time { padding-bottom: 9px; color: var(--muted); font-size: 12px; }
.briefing-table { margin-top: 55px; border-top: 1px solid var(--navy); }
.briefing-table article { min-height: 130px; padding: 25px 0; border-bottom: 1px solid rgba(16,43,70,.25); display: grid; grid-template-columns: 130px 300px 1fr; gap: 30px; align-items: baseline; }
.briefing-table span { color: var(--peach-deep); font-size: 11px; font-weight: 700; }
.briefing-table h3 { margin: 0; color: var(--navy); font: 500 23px var(--serif); }
.briefing-table p { margin: 0; color: #5d666d; }

.access-hub { background: var(--peach-deep); color: #fff; }
.access-shell { max-width: var(--max); margin: auto; padding: 120px 42px; display: grid; grid-template-columns: .7fr 1.3fr; gap: 85px; }
.access-hub .eyebrow { color: #ffd0c2; }
.access-hub h2 { color: #fff; }
.access-intro > p:last-child { margin-top: 30px; color: rgba(255,255,255,.73); }
.access-matrix { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid rgba(255,255,255,.45); border-left: 1px solid rgba(255,255,255,.45); }
.access-matrix article { min-height: 260px; padding: 30px; border-right: 1px solid rgba(255,255,255,.45); border-bottom: 1px solid rgba(255,255,255,.45); display: flex; flex-direction: column; }
.access-matrix span { color: #ffe2d8; font-size: 10px; letter-spacing: .2em; }
.access-matrix h3 { margin: 42px 0 9px; font: 500 25px var(--serif); }
.access-matrix p { margin: 0; color: rgba(255,255,255,.72); font-size: 13px; }
.access-matrix b { margin-top: auto; padding-top: 20px; font-size: 10px; letter-spacing: .12em; }

.faq { display: grid; grid-template-columns: 105px .65fr 1.35fr; gap: 56px; }
.faq-list { border-top: 1px solid var(--navy); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { position: relative; padding: 23px 52px 23px 0; color: var(--navy); font: 500 20px var(--serif); cursor: pointer; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 8px; font: 400 24px var(--sans); }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { margin: -5px 50px 25px 0; color: var(--muted); font-size: 14px; }

.source-note { background: var(--ivory); }
.source-shell { max-width: 1050px; margin: auto; padding: 100px 42px; text-align: center; }
.source-note h2 { font-size: clamp(40px,4.2vw,64px); }
.source-note .source-shell > p:last-child { margin: 34px 0 0; color: var(--muted); }

.brand-profile { background: var(--navy); color: #fff; }
.profile-shell { max-width: var(--max); margin: auto; padding: 120px 42px; display: grid; grid-template-columns: .8fr 1.2fr; gap: 90px; }
.brand-profile .eyebrow { color: #ffad99; }
.brand-profile h2 { color: #fff; }
.profile-heading > p:last-child { color: rgba(255,255,255,.6); }
.profile-data { margin: 0; border-top: 1px solid rgba(255,255,255,.35); }
.profile-data div { min-height: 76px; padding: 17px 0; border-bottom: 1px solid rgba(255,255,255,.2); display: grid; grid-template-columns: 150px 1fr; align-items: center; }
.profile-data dt { color: #ffb9a8; font-size: 11px; }
.profile-data dd { margin: 0; font: 500 17px var(--serif); }

.site-footer { background: var(--navy-deep); color: #fff; }
.footer-shell { max-width: var(--max); margin: auto; padding: 60px 42px; display: grid; grid-template-columns: 1.2fr 1fr 1.4fr 1fr; gap: 35px; align-items: center; }
.footer-brand { display: flex; align-items: center; gap: 14px; }
.footer-brand img { width: 54px; height: 54px; object-fit: contain; }
.footer-brand span { display: grid; }
.footer-brand strong { font: 500 22px var(--serif); }
.footer-brand small { color: rgba(255,255,255,.5); font-size: 10px; }
.site-footer p { margin: 0; color: rgba(255,255,255,.58); font-size: 11px; }
.footer-shell > small { grid-column: 1 / 5; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.15); color: rgba(255,255,255,.38); }

@media (max-width: 1220px) {
  .header-note { display: none; }
  .hero-summary { width: 310px; }
  .directory-list article { grid-template-columns: 105px 190px 1fr; }
  .theme-stage { grid-template-columns: .7fr 1.3fr; }
}

@media (max-width: 980px) {
  html { scroll-padding-top: 74px; }
  .header-shell { min-height: 74px; padding: 0 24px; }
  .menu-toggle { display: block; }
  .primary-nav { display: none; position: absolute; top: 74px; right: 0; left: 0; padding: 20px 24px; grid-template-columns: 1fr 1fr; gap: 0 30px; background: var(--white); border-bottom: 1px solid var(--line); }
  .primary-nav.is-open { display: grid; }
  .primary-nav a { padding: 11px 0; }
  .primary-nav a::after { bottom: 6px; }
  .signal-hero { min-height: 850px; }
  .hero-copy { width: 86%; padding: 125px 55px 40px 125px; }
  .hero-copy h1 { font-size: 67px; }
  .hero-summary { right: 30px; bottom: 100px; }
  .hero-ruler { left: 70px; padding: 0 25px; grid-template-columns: repeat(3,1fr); }
  .hero-ruler span:nth-child(-n+3) { display: none; }
  .platform-position, .discovery, .attention, .faq { grid-template-columns: 75px 1fr; gap: 38px; padding: 95px 28px; }
  .position-copy, .discovery-heading, .discovery-visual, .directory-list, .attention-copy, .faq-list { grid-column: 2; }
  .discovery-heading { grid-template-columns: 1fr; }
  .discovery-heading .eyebrow { grid-column: 1; }
  .overview-shell, .access-shell, .profile-shell { grid-template-columns: 1fr; gap: 55px; padding: 90px 28px; }
  .theme-shell { padding: 95px 28px; }
  .theme-stream header { grid-template-columns: 75px 1fr; gap: 38px; }
  .theme-stream header .eyebrow { grid-column: 2; }
  .theme-stream header > p:last-child { grid-column: 2; }
  .theme-stage { grid-template-columns: 1fr; }
  .theme-image { min-height: 500px; }
  .briefing-shell { padding: 90px 28px; }
  .briefing-table article { grid-template-columns: 110px 240px 1fr; }
  .footer-shell { grid-template-columns: 1fr 1fr; }
  .footer-brand, .footer-shell > small { grid-column: 1 / 3; }
}

@media (max-width: 650px) {
  .brand-lockup { min-width: 0; }
  .brand-lockup img { width: 40px; height: 40px; }
  .brand-lockup strong { font-size: 21px; }
  .brand-lockup small { display: none; }
  .primary-nav { grid-template-columns: 1fr; }
  .signal-hero { min-height: 790px; }
  .vertical-brand { width: 48px; }
  .vertical-brand span { font-size: 25px; }
  .hero-panorama::after { background: linear-gradient(90deg, rgba(8,27,44,.96), rgba(8,27,44,.52)); }
  .hero-copy { width: 100%; padding: 95px 24px 30px 76px; }
  .hero-copy h1 { font-size: 45px; }
  .hero-lead { font-size: 19px; }
  .hero-summary { right: 18px; bottom: 92px; width: calc(100% - 86px); padding: 20px; }
  .hero-summary p { font-size: 12px; }
  .hero-ruler { left: 48px; min-height: 62px; padding: 0 12px; }
  .hero-ruler span { padding: 8px 3px; font-size: 9px; }
  .section-shell, .platform-position, .discovery, .attention, .faq { padding: 76px 18px; grid-template-columns: 1fr; gap: 28px; }
  .section-label { align-items: center; }
  .section-label span { font-size: 25px; }
  .position-copy, .discovery-heading, .discovery-visual, .directory-list, .attention-copy, .faq-list { grid-column: 1; }
  .position-heading h2, .content-overview h2, .discovery h2, .theme-stream h2, .attention h2, .briefing h2, .access-hub h2, .faq h2, .source-note h2, .brand-profile h2 { font-size: 39px; }
  .overview-shell, .theme-shell, .briefing-shell, .access-shell, .profile-shell { padding: 76px 18px; }
  .overview-lines article { grid-template-columns: 40px 1fr; }
  .overview-lines p { grid-column: 2; }
  .directory-list article { grid-template-columns: 1fr; gap: 7px; }
  .theme-stream header { grid-template-columns: 1fr; gap: 24px; }
  .theme-stream header .section-label, .theme-stream header .eyebrow, .theme-stream header > p:last-child { grid-column: 1; grid-row: auto; }
  .theme-image { min-height: 340px; }
  .theme-list { grid-template-columns: 1fr; }
  .theme-list article { min-height: 180px; }
  .theme-list h3 { margin-top: 26px; }
  .attention-copy { column-count: 1; }
  .attention-copy p + p { margin-top: 20px; }
  .briefing header { grid-template-columns: 1fr; }
  .briefing header .eyebrow { grid-column: 1; }
  .briefing time { margin-top: 20px; }
  .briefing-table article { grid-template-columns: 1fr; gap: 7px; }
  .access-matrix { grid-template-columns: 1fr; }
  .access-matrix article { min-height: 225px; }
  .profile-data div { grid-template-columns: 105px 1fr; }
  .source-shell { padding: 76px 18px; }
  .footer-shell { padding: 50px 18px; grid-template-columns: 1fr; gap: 18px; }
  .footer-brand, .footer-shell > small { grid-column: 1; }
}

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