:root {
  --navy: #10213f;
  --navy-deep: #08162d;
  --blue: #1677ff;
  --cyan: #20c9e8;
  --pink: #ff56a7;
  --white: #fff;
  --soft: #f4faff;
  --sky: #e8f8ff;
  --muted: #65758f;
  --line: #dce8f2;
  --shadow: 0 28px 75px rgba(22, 89, 141, .13);
  --container: min(1160px, calc(100% - 48px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--navy); background: #fff; font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", system-ui, sans-serif; line-height: 1.65; -webkit-font-smoothing: antialiased; }
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; }
img { display: block; max-width: 100%; }
.container { width: var(--container); margin: 0 auto; }

.site-header { position: fixed; inset: 0 0 auto; z-index: 50; border-bottom: 1px solid rgba(211,226,237,.72); background: rgba(255,255,255,.9); box-shadow: 0 12px 36px rgba(27,80,122,.06); backdrop-filter: blur(18px); }
.nav-wrap { min-height: 82px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 12px; flex: 0 0 auto; font-size: 23px; font-weight: 950; letter-spacing: -.045em; }
.brand-logo { width: 50px; height: 50px; object-fit: cover; border-radius: 16px; box-shadow: 0 10px 25px rgba(20,154,225,.2); }
.brand small { display: block; margin-top: -5px; color: #7a89a0; font-size: 8px; font-weight: 800; letter-spacing: .2em; }
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links > a:not(.nav-cta) { color: #53647c; font-size: 13px; transition: color .2s ease; }
.nav-links > a:not(.nav-cta):hover, .nav-links > a.active { color: var(--blue); }
.nav-links > a.nav-cta.active { color: #fff; }
.nav-cta, .button { min-height: 48px; display: inline-flex; align-items: center; justify-content: center; gap: 9px; padding: 0 23px; border: 0; border-radius: 999px; color: #fff; background: linear-gradient(135deg, var(--blue), var(--cyan)); box-shadow: 0 12px 28px rgba(22,119,255,.22); cursor: pointer; font-weight: 900; transition: transform .2s ease, box-shadow .2s ease; }
.nav-cta:hover, .button:hover { transform: translateY(-2px); box-shadow: 0 17px 34px rgba(22,119,255,.28); }
.button-secondary { color: var(--navy); border: 1px solid #cbddea; background: #fff; box-shadow: none; }
.button-secondary:hover { border-color: #8fccec; box-shadow: 0 12px 28px rgba(38,111,165,.09); }
.menu-toggle { display: none; width: 44px; height: 44px; padding: 0; border: 1px solid var(--line); border-radius: 14px; background: #fff; cursor: pointer; }
.menu-toggle span { display: block; width: 18px; height: 2px; margin: 5px auto; background: var(--navy); }

.page-hero { position: relative; min-height: 680px; display: grid; place-items: center; padding: 150px 0 92px; overflow: hidden; background: radial-gradient(circle at 82% 22%, rgba(32,201,232,.19), transparent 28%), radial-gradient(circle at 10% 78%, rgba(22,119,255,.1), transparent 25%), linear-gradient(180deg, #f9fdff, #fff); }
.page-hero::before { content: ""; position: absolute; inset: 0; opacity: .45; background-image: linear-gradient(rgba(22,119,255,.05) 1px, transparent 1px), linear-gradient(90deg, rgba(22,119,255,.05) 1px, transparent 1px); background-size: 48px 48px; mask-image: linear-gradient(to bottom, #000, transparent 92%); }
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1.08fr .92fr; align-items: center; gap: 70px; }
.eyebrow { display: inline-flex; align-items: center; gap: 9px; color: var(--blue); font-size: 11px; font-weight: 900; letter-spacing: .19em; text-transform: uppercase; }
.eyebrow::before { content: ""; width: 9px; height: 9px; border: 4px solid #cae7ff; border-radius: 50%; background: var(--blue); }
.page-title { margin: 24px 0; font-size: clamp(52px, 6.4vw, 86px); line-height: 1; letter-spacing: -.075em; font-weight: 950; }
.page-title em { color: transparent; background: linear-gradient(92deg, var(--blue), var(--cyan)); background-clip: text; -webkit-background-clip: text; font-style: normal; }
.hero-copy { max-width: 660px; margin: 0; color: var(--muted); font-size: 17px; line-height: 1.95; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 13px; margin-top: 32px; }

.hero-visual { position: relative; min-height: 460px; }
.visual-orbit { position: absolute; inset: 4%; border: 1px solid rgba(22,119,255,.2); border-radius: 50%; transform: rotate(13deg); }
.visual-orbit::before, .visual-orbit::after { content: ""; position: absolute; inset: 12% -6%; border: 1px solid rgba(32,201,232,.18); border-radius: 50%; transform: rotate(54deg); }
.visual-orbit::after { inset: 21% -9%; transform: rotate(105deg); }
.visual-core { position: absolute; inset: 12%; display: grid; place-items: center; border-radius: 48% 52% 46% 54% / 53% 44% 56% 47%; background: linear-gradient(145deg, rgba(255,255,255,.96), rgba(221,247,255,.86)); box-shadow: var(--shadow); }
.visual-logo { width: 190px; padding: 18px; border-radius: 55px; background: #fff; box-shadow: 0 28px 60px rgba(31,111,167,.2); transform: rotate(-5deg); }
.visual-logo img { border-radius: 40px; }
.visual-chip { position: absolute; min-width: 142px; padding: 14px 16px; border: 1px solid rgba(255,255,255,.8); border-radius: 17px; background: rgba(255,255,255,.92); box-shadow: 0 18px 40px rgba(38,91,138,.14); backdrop-filter: blur(10px); }
.visual-chip strong { display: block; font-size: 14px; }
.visual-chip small { display: block; color: #8190a5; font-size: 10px; }
.visual-chip.one { left: 0; top: 25%; }
.visual-chip.two { right: -1%; bottom: 17%; }

.section { padding: 105px 0; }
.section-soft { background: var(--soft); }
.section-dark { color: #fff; background: var(--navy-deep); }
.section-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 45px; margin-bottom: 48px; }
.section-kicker { display: block; margin-bottom: 13px; color: var(--blue); font-size: 11px; font-weight: 900; letter-spacing: .19em; }
.section-dark .section-kicker { color: #4ad8ec; }
.section-title { margin: 0; font-size: clamp(38px, 4.5vw, 60px); line-height: 1.08; letter-spacing: -.06em; }
.section-title em { color: var(--blue); font-style: normal; }
.section-dark .section-title em { color: #43d9ed; }
.section-intro { max-width: 500px; margin: 0; color: var(--muted); line-height: 1.9; }
.section-dark .section-intro { color: #9fb1cd; }

.story-grid { display: grid; grid-template-columns: .72fr 1.28fr; gap: 70px; align-items: start; }
.year-card { position: sticky; top: 120px; min-height: 420px; display: flex; flex-direction: column; justify-content: space-between; padding: 40px; overflow: hidden; border-radius: 34px; color: #fff; background: linear-gradient(155deg, #1478ff, #1ec6e5); box-shadow: 0 28px 65px rgba(22,119,255,.23); }
.year-card::after { content: ""; position: absolute; width: 300px; height: 300px; right: -130px; bottom: -130px; border: 58px solid rgba(255,255,255,.13); border-radius: 50%; }
.year-card span { position: relative; z-index: 1; font-size: 12px; font-weight: 900; letter-spacing: .2em; }
.year-card strong { position: relative; z-index: 1; font-size: clamp(84px, 10vw, 132px); line-height: .82; letter-spacing: -.09em; }
.year-card p { position: relative; z-index: 1; margin: 0; color: rgba(255,255,255,.82); font-size: 14px; }
.story-copy { padding-top: 8px; }
.story-copy h2 { margin: 0 0 30px; font-size: clamp(38px, 4.5vw, 58px); line-height: 1.12; letter-spacing: -.055em; }
.story-copy h2 em { color: var(--blue); font-style: normal; }
.story-copy p { color: #566a83; font-size: 17px; line-height: 2.05; }
.story-note { margin-top: 32px; padding: 25px 28px; border-left: 4px solid var(--cyan); border-radius: 0 18px 18px 0; background: #eefaff; color: #46627c; }

.audience-grid { display: grid; grid-template-columns: .82fr 1.18fr; gap: 52px; align-items: stretch; }
.audience-number { min-height: 400px; display: flex; flex-direction: column; justify-content: center; padding: 45px; border: 1px solid var(--line); border-radius: 32px; background: #fff; box-shadow: var(--shadow); }
.audience-number small { color: var(--blue); font-size: 11px; font-weight: 900; letter-spacing: .18em; }
.audience-number strong { display: block; margin: 25px 0 18px; font-size: clamp(72px, 9vw, 118px); line-height: .8; letter-spacing: -.09em; }
.audience-number strong span { color: var(--cyan); }
.audience-number p { margin: 0; color: var(--muted); }
.category-mini-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
.category-mini { min-height: 190px; display: flex; flex-direction: column; justify-content: space-between; padding: 24px; border: 1px solid var(--line); border-radius: 23px; background: #fff; transition: transform .2s ease, border-color .2s ease; }
.category-mini:hover { transform: translateY(-5px); border-color: #9fd6f0; }
.category-mini span { color: #8395aa; font-size: 10px; font-weight: 900; letter-spacing: .15em; }
.category-mini strong { font-size: 22px; }
.category-mini i { align-self: flex-end; color: var(--blue); font-size: 34px; font-style: normal; }

.capability-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 13px; }
.capability-card { position: relative; min-height: 280px; padding: 25px; overflow: hidden; border: 1px solid #263a5c; border-radius: 23px; background: #102342; }
.capability-card::after { content: attr(data-letter); position: absolute; right: -6px; bottom: -30px; color: rgba(69,219,237,.07); font-size: 112px; font-weight: 950; }
.capability-card span { color: #45dbee; font-size: 10px; font-weight: 900; letter-spacing: .16em; }
.capability-card h3 { margin: 85px 0 10px; font-size: 21px; }
.capability-card p { margin: 0; color: #95a9c7; font-size: 12px; }

.mission-panel { display: grid; grid-template-columns: 1.1fr .9fr; gap: 45px; align-items: center; padding: 55px; border-radius: 34px; background: linear-gradient(135deg, #e3faff, #edf2ff); }
.mission-panel h2 { margin: 0 0 18px; font-size: clamp(38px, 5vw, 62px); line-height: 1.08; letter-spacing: -.06em; }
.mission-panel h2 em { color: var(--blue); font-style: normal; }
.mission-panel p { margin: 0; color: var(--muted); line-height: 1.95; }
.mission-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 12px; }

.contact-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 55px; align-items: start; }
.contact-stack { display: grid; gap: 14px; }
.contact-card { display: grid; grid-template-columns: 54px 1fr auto; gap: 16px; align-items: center; padding: 20px; border: 1px solid var(--line); border-radius: 20px; background: #fff; transition: transform .2s ease, border-color .2s ease; }
.contact-card:hover { transform: translateY(-3px); border-color: #9fd5ef; }
.contact-icon { width: 50px; height: 50px; display: grid; place-items: center; color: #fff; border-radius: 16px; background: linear-gradient(135deg, var(--blue), var(--cyan)); font-size: 21px; }
.contact-card small { display: block; color: #8596aa; font-size: 10px; }
.contact-card strong { display: block; margin-top: 3px; font-size: 15px; word-break: break-word; }
.contact-card > i { color: #91a3b8; font-style: normal; }
.map-panel { position: relative; min-height: 340px; margin-top: 15px; display: grid; place-items: center; overflow: hidden; border-radius: 28px; background: #0b1c37; }
.map-panel::before { content: ""; position: absolute; inset: 0; opacity: .34; background-image: linear-gradient(#385071 1px, transparent 1px), linear-gradient(90deg, #385071 1px, transparent 1px); background-size: 38px 38px; }
.map-route { position: absolute; width: 78%; height: 50%; border: 2px dashed rgba(62,217,235,.55); border-radius: 50%; transform: rotate(-12deg); }
.map-pin { position: relative; z-index: 1; width: 118px; height: 118px; display: grid; place-items: center; border: 13px solid rgba(255,255,255,.14); border-radius: 50%; color: #fff; background: linear-gradient(135deg, var(--blue), var(--cyan)); font-size: 37px; box-shadow: 0 20px 55px rgba(20,187,225,.27); }
.map-label { position: absolute; z-index: 2; left: 24px; right: 24px; bottom: 20px; padding: 14px 17px; color: #dbe9fb; border: 1px solid #29405f; border-radius: 15px; background: rgba(10,29,56,.85); font-size: 12px; text-align: center; backdrop-filter: blur(8px); }

.contact-form { padding: 36px; border: 1px solid var(--line); border-radius: 30px; background: #fff; box-shadow: var(--shadow); }
.form-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 22px; margin-bottom: 28px; }
.form-head h2 { margin: 0; font-size: 28px; letter-spacing: -.04em; }
.form-head span { color: #8797aa; font-size: 10px; }
.field-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
.field { margin-top: 16px; }
.field label { display: block; margin-bottom: 8px; font-size: 12px; font-weight: 900; }
.field input, .field textarea, .field select { width: 100%; padding: 14px 15px; border: 1px solid #d5e2ed; border-radius: 13px; outline: none; color: var(--navy); background: #f9fcff; transition: border-color .2s ease, box-shadow .2s ease; }
.field textarea { min-height: 125px; resize: vertical; }
.field input:focus, .field textarea:focus, .field select:focus { border-color: var(--blue); box-shadow: 0 0 0 4px rgba(22,119,255,.1); }
.contact-form .button { width: 100%; margin-top: 22px; }
.form-message { min-height: 24px; margin: 13px 0 0; color: #087d90; font-size: 12px; text-align: center; }
.form-tip { margin: 6px 0 0; color: #8a9aaf; font-size: 10px; text-align: center; }

.topics-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 15px; }
.topic-card { min-height: 190px; padding: 25px; border: 1px solid var(--line); border-radius: 22px; background: #fff; }
.topic-card span { color: var(--blue); font-size: 10px; font-weight: 900; letter-spacing: .14em; }
.topic-card h3 { margin: 50px 0 8px; font-size: 20px; }
.topic-card p { margin: 0; color: var(--muted); font-size: 12px; }

footer { color: #95a9c7; background: #071327; }
.footer-main { min-height: 155px; display: flex; align-items: center; justify-content: space-between; gap: 35px; border-bottom: 1px solid #1b2c49; }
.footer-main .brand { color: #fff; }
.footer-copy { margin: 8px 0 0 62px; font-size: 11px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 22px; font-size: 12px; }
.footer-links a:hover { color: #fff; }
.footer-phone span { display: block; color: #6480a8; font-size: 10px; }
.footer-phone a { color: #fff; font-size: 19px; font-weight: 900; }
.copyright { min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 20px; font-size: 10px; }

[data-reveal] { opacity: 0; transform: translateY(22px); transition: opacity .65s ease, transform .65s ease; }
[data-reveal].revealed { opacity: 1; transform: none; }
:focus-visible { outline: 3px solid rgba(32,201,232,.78); outline-offset: 4px; }

@media (max-width: 980px) {
  .nav-links { gap: 18px; }
  .hero-grid { gap: 35px; }
  .capability-grid { grid-template-columns: repeat(3, 1fr); }
  .topics-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 800px) {
  :root { --container: min(100% - 32px, 700px); }
  .nav-wrap { min-height: 72px; }
  .brand { font-size: 20px; }
  .brand-logo { width: 44px; height: 44px; border-radius: 14px; }
  .menu-toggle { display: block; }
  .nav-links { position: fixed; inset: 72px 16px auto; display: grid; gap: 0; padding: 16px; border: 1px solid var(--line); border-radius: 20px; background: rgba(255,255,255,.98); box-shadow: var(--shadow); opacity: 0; transform: translateY(-12px); pointer-events: none; transition: opacity .2s ease, transform .2s ease; }
  .nav-links.open { opacity: 1; transform: none; pointer-events: auto; }
  .nav-links > a:not(.nav-cta) { padding: 13px 10px; border-bottom: 1px solid #edf3f8; }
  .nav-cta { margin-top: 12px; }
  .page-hero { min-height: auto; padding: 125px 0 75px; }
  .hero-grid, .story-grid, .audience-grid, .mission-panel, .contact-layout { grid-template-columns: 1fr; }
  .hero-visual { min-height: 420px; }
  .year-card { position: relative; top: auto; min-height: 330px; }
  .capability-grid { grid-template-columns: 1fr 1fr; }
  .mission-actions { justify-content: flex-start; }
  .footer-main { padding: 38px 0; align-items: flex-start; flex-direction: column; }
  .footer-copy { margin-left: 0; }
}

@media (max-width: 540px) {
  .page-title { font-size: 49px; }
  .hero-copy { font-size: 15px; }
  .hero-actions .button { width: 100%; }
  .hero-visual { min-height: 350px; }
  .visual-logo { width: 145px; padding: 13px; border-radius: 43px; }
  .visual-logo img { border-radius: 31px; }
  .visual-chip { min-width: 125px; padding: 11px 13px; }
  .section { padding: 76px 0; }
  .section-heading { align-items: flex-start; flex-direction: column; margin-bottom: 36px; }
  .section-title { font-size: 39px; }
  .story-copy p { font-size: 15px; }
  .category-mini-grid, .capability-grid, .topics-grid { grid-template-columns: 1fr; }
  .capability-card { min-height: 230px; }
  .capability-card h3 { margin-top: 60px; }
  .mission-panel { padding: 32px 24px; }
  .contact-card { grid-template-columns: 50px 1fr; }
  .contact-card > i { display: none; }
  .contact-form { padding: 28px 20px; }
  .field-grid { grid-template-columns: 1fr; gap: 0; }
  .copyright { padding: 20px 0; align-items: flex-start; flex-direction: column; }
}

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