/* ============================================================
   万川官网 · 关于我们
   品牌来源、产品原则与经营主体，保持克制并提供可核对信息。
   ============================================================ */

.about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  margin-top: -68px;
  padding: 148px 0 92px;
  color: var(--text-onDark);
  background:
    radial-gradient(circle at 74% 20%, rgba(82, 123, 230, .18), transparent 27%),
    radial-gradient(circle at 13% 90%, rgba(45, 78, 168, .15), transparent 31%),
    linear-gradient(148deg, #07102d 0%, #0a143b 52%, #08102d 100%);
}
.about-hero::after { content: ""; position: absolute; z-index: -1; width: 760px; height: 760px; right: -280px; bottom: -570px; border: 1px solid rgba(157, 182, 255, .10); border-radius: 50%; box-shadow: 0 0 0 88px rgba(105, 139, 229, .024), 0 0 0 176px rgba(105, 139, 229, .014); }
.about-hero-grid { position: absolute; z-index: -1; inset: 0; opacity: .68; background-image: linear-gradient(rgba(157, 182, 255, .04) 1px, transparent 1px), linear-gradient(90deg, rgba(157, 182, 255, .04) 1px, transparent 1px); background-size: 58px 58px; mask-image: radial-gradient(ellipse 82% 75% at 70% 43%, #000 25%, transparent 79%); -webkit-mask-image: radial-gradient(ellipse 82% 75% at 70% 43%, #000 25%, transparent 79%); animation: about-grid-drift 26s linear infinite; }
.about-hero-layout { position: relative; display: grid; grid-template-columns: minmax(390px, .84fr) minmax(540px, 1.16fr); gap: 70px; align-items: center; }
.about-hero-copy .eyebrow { margin-bottom: 18px; color: var(--moon-300); font-size: 11px; letter-spacing: .12em; }
.about-hero-copy h1 { max-width: 580px; color: #f7f9ff; font-size: clamp(36px, 3.5vw, 48px); font-weight: 600; line-height: 1.17; letter-spacing: -.035em; }
.about-hero-copy h1 span { color: #a9bef9; }
.about-hero-copy > p:not(.eyebrow) { max-width: 550px; margin-top: 24px; color: #aab7de; font-size: 15px; line-height: 1.82; }
.about-hero-actions { display: flex; align-items: center; gap: 22px; margin-top: 31px; }
.about-text-link { display: inline-flex; align-items: center; gap: 7px; color: #c9d5f7; font-size: 13px; font-weight: 600; }
.about-text-link::after { content: "→"; color: var(--moon-300); transition: transform .18s ease; }
.about-text-link:hover::after { transform: translateX(4px); }

.brand-map { position: relative; min-height: 350px; margin: 0; overflow: hidden; border: 1px solid rgba(151, 176, 245, .16); border-radius: 20px; background: linear-gradient(155deg, rgba(20, 36, 89, .76), rgba(5, 13, 42, .90)); box-shadow: 0 30px 70px -42px rgba(0, 0, 0, .9), inset 0 1px 0 rgba(255, 255, 255, .035); backdrop-filter: blur(10px); }
.brand-map::before { content: ""; position: absolute; inset: 0; opacity: .26; background-image: radial-gradient(circle, rgba(181, 199, 255, .32) 1px, transparent 1px); background-size: 18px 18px; }
.brand-map-head { position: relative; z-index: 3; height: 49px; display: flex; align-items: center; justify-content: space-between; padding: 0 24px; border-bottom: 1px solid rgba(157, 182, 255, .10); }
.brand-map-head span { color: #c7d2f3; font-size: 10px; }
.brand-map-head b { color: #6678ae; font-family: var(--font-mono); font-size: 8px; font-weight: 500; }
.brand-moon { position: absolute; z-index: 3; left: 50%; top: 155px; width: 112px; height: 112px; display: flex; flex-direction: column; align-items: center; justify-content: center; border: 1px solid rgba(252, 217, 160, .25); border-radius: 50%; background: radial-gradient(circle at 44% 35%, rgba(252, 217, 160, .20), rgba(22, 39, 92, .82) 55%, rgba(5, 13, 42, .94)); box-shadow: 0 0 48px rgba(88, 125, 225, .20); transform: translateX(-50%); }
.brand-moon i { width: 15px; height: 15px; margin-bottom: 9px; border-radius: 50%; background: linear-gradient(145deg, var(--moon-200), var(--moon-400)); box-shadow: 0 0 18px rgba(252, 217, 160, .55); }
.brand-moon b { color: #f4f6ff; font-size: 13px; font-weight: 600; }
.brand-moon span { margin-top: 3px; color: #7183b9; font-family: var(--font-mono); font-size: 7px; }
.brand-rings i { position: absolute; z-index: 1; left: 50%; top: 211px; border: 1px solid rgba(118, 151, 237, .17); border-radius: 50%; transform: translate(-50%, -50%); }
.brand-rings i:nth-child(1) { width: 178px; height: 104px; }
.brand-rings i:nth-child(2) { width: 282px; height: 172px; }
.brand-rings i:nth-child(3) { width: 410px; height: 236px; }
.brand-platforms li { position: absolute; z-index: 2; min-width: 74px; padding: 8px 11px; border: 1px solid rgba(157, 182, 255, .13); border-radius: 10px; color: #a8b5da; background: rgba(7, 16, 47, .78); font-size: 9px; text-align: center; }
.brand-platforms li:nth-child(1) { left: 8%; top: 105px; }
.brand-platforms li:nth-child(2) { right: 8%; top: 101px; }
.brand-platforms li:nth-child(3) { left: 5%; top: 241px; }
.brand-platforms li:nth-child(4) { right: 4%; top: 232px; }
.brand-platforms li:nth-child(5) { right: 17%; bottom: 35px; }
.brand-platforms li::before { content: ""; display: inline-block; width: 5px; height: 5px; margin-right: 6px; border-radius: 50%; background: #52cda1; box-shadow: 0 0 10px rgba(82, 205, 161, .35); }
.brand-map figcaption { position: absolute; z-index: 3; left: 24px; bottom: 22px; color: #7183b6; font-size: 9px; }

.about-story { padding: 88px 0; }
.about-story-layout { display: grid; grid-template-columns: minmax(280px, .65fr) minmax(0, 1.35fr); gap: 90px; align-items: start; }
.about-story .section-head { margin-bottom: 0; }
.about-story .section-title,
.about-principles .section-title,
.about-company .section-title { font-size: clamp(27px, 3vw, 36px); font-weight: 600; letter-spacing: -.025em; }
.about-story-copy { max-width: 700px; }
.about-story-copy > p { color: var(--text-soft); font-size: 15px; line-height: 1.85; }
.about-story-copy > p + p { margin-top: 18px; }
.about-story-copy blockquote { margin: 31px 0 0; padding: 22px 24px; border-left: 2px solid var(--moon-400); color: var(--text); background: var(--bg-subtle); font-size: 18px; font-weight: 600; line-height: 1.65; }

.about-principles { padding: 88px 0; }
.about-principles .section-head { margin-bottom: 40px; }
.about-principle-grid { gap: 12px; }
.about-principle-grid .card { min-height: 245px; padding: 28px; border-radius: 16px; box-shadow: none; }
.about-principle-grid .card > span { color: var(--moon-500); font-family: var(--font-mono); font-size: 13px; font-weight: 600; letter-spacing: .04em; }
.about-principle-grid .claim-title { margin-top: 38px; font-size: 17px; font-weight: 600; }
.about-principle-grid .claim-body { margin-top: 12px; color: var(--text-soft); font-size: 13.5px; line-height: 1.75; }

.about-company { padding: 88px 0; }
.about-company .grid--split { align-items: start; gap: 78px; }
.about-company .section-lede { max-width: 440px; font-size: 14px; }
.about-company .company-card { padding: 10px 25px; border: 1px solid var(--border); border-radius: 17px; background: var(--bg-card); box-shadow: 0 28px 64px -50px rgba(12, 27, 79, .38); }
.about-company .company-row { grid-template-columns: 145px minmax(0, 1fr); padding: 17px 0; font-size: 13.5px; line-height: 1.65; }
.about-company .company-row dt { font-size: 12px; }
.about-company .company-row dd { font-weight: 500; }

.about-contact { position: relative; overflow: hidden; padding: 88px 0; background: linear-gradient(145deg, #101c4d, #07102f 76%); }
.about-contact::after { content: ""; position: absolute; right: -180px; top: -330px; width: 660px; height: 660px; border-radius: 50%; background: radial-gradient(circle, rgba(252, 217, 160, .10), transparent 68%); }
.about-contact-layout { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1fr) 220px; gap: 80px; align-items: center; }
.about-contact-copy h2 { color: #fff; font-size: clamp(27px, 3vw, 36px); font-weight: 600; }
.about-contact-copy > p:not(.eyebrow):not(.cta-phone) { max-width: 620px; margin-top: 14px; color: #9faed5; font-size: 14px; line-height: 1.75; }
.about-contact .cta-actions { justify-content: flex-start; margin-top: 28px; }
.about-contact .cta-phone { margin-left: 0; text-align: left; }
.about-contact .wecom-card { margin-top: 0; }

@keyframes about-grid-drift { to { background-position: 58px 58px; } }

@media (max-width: 1040px) {
  .about-hero-layout { grid-template-columns: minmax(0, 1fr); gap: 44px; }
  .brand-map { max-width: 760px; }
  .about-story-layout { grid-template-columns: minmax(0, 1fr); gap: 28px; }
}

@media (max-width: 900px) {
  /* 公司信息卡的标签列 145px，邮箱至少 147px；继续两栏到 640px
     会在 768px 平板上把邮箱挤出卡片。这一块单独提前收成一栏。 */
  .about-company .grid--split { grid-template-columns: minmax(0, 1fr); gap: 34px; }
}

@media (max-width: 760px) {
  .about-principle-grid { grid-template-columns: minmax(0, 1fr); }
  .about-contact-layout { grid-template-columns: minmax(0, 1fr); gap: 38px; }
  .about-contact-layout > div:last-child { justify-self: start; }
}

@media (max-width: 580px) {
  .about-hero { padding-top: 126px; padding-bottom: 72px; }
  .about-hero-copy h1 { font-size: 33px; line-height: 1.18; }
  .about-hero-copy > p:not(.eyebrow) { font-size: 14.5px; }
  .about-hero-actions { flex-direction: column; align-items: stretch; gap: 14px; }
  .about-hero-actions .btn { width: 100%; }
  .about-text-link { justify-content: center; }
  .brand-map { min-height: 390px; }
  .brand-rings i:nth-child(3) { width: 340px; }
  .brand-platforms li:nth-child(3) { top: 258px; }
  .brand-platforms li:nth-child(4) { top: 250px; }
  .about-story, .about-principles, .about-company, .about-contact { padding: 72px 0; }
  .about-story-copy blockquote { font-size: 16px; }
  .about-company .grid--split { grid-template-columns: minmax(0, 1fr); gap: 34px; }
  .about-company .company-row { grid-template-columns: minmax(0, 1fr); gap: 5px; }
  .about-contact .cta-actions { align-items: stretch; }
  .about-contact .cta-phone { text-align: center; }
  .about-contact-layout > div:last-child { justify-self: center; }
  .about-company .company-row a { min-height: 44px; display: inline-flex; align-items: center; }
}

@media (prefers-reduced-motion: reduce) {
  .about-hero-grid { animation: none; }
}