:root {
  font-family: Inter, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color: #f4f4f5;
  background: #0a0b0c;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  --line: #2c2e34;
  --muted: #8c8e94;
  --blue: #52c5ff;
  --violet: #563dfc;
  --pink: #f141a1;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; background: #050607; color: #f4f4f5; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.aicoin-site { overflow-x: hidden; }

.aicoin-header { height: 80px; position: sticky; top: 0; z-index: 30; background: rgba(13,14,15,.94); border-bottom: 1px solid #292b30; backdrop-filter: blur(15px); }
.aicoin-nav { width: min(1200px, 100%); height: 100%; margin: auto; padding: 0 20px; display: flex; align-items: center; gap: 25px; }
.zhixin-header-link { width: 136px; height: 38px; flex: 0 0 auto; display: flex; align-items: center; justify-content: center; margin-right: -12px; padding: 3px 8px; overflow: hidden; border-radius: 7px; background: #fff; }
.zhixin-header-link img { display: block; width: 100%; height: 100%; object-fit: contain; }
.aicoin-brand { display: flex; align-items: center; gap: 7px; flex: 0 0 auto; font-weight: 800; font-size: 16px; letter-spacing: .04em; }
.aicoin-brand small { display: block; color: #909298; font-size: 6px; font-weight: 400; letter-spacing: .02em; }
.aicoin-mark { width: 34px; height: 34px; display: grid; place-items: center; border: 2px solid #e8e8e8; border-radius: 50%; color: #e8e8e8; font-size: 14px; font-weight: 900; letter-spacing: -.12em; }
.aicoin-links { display: flex; align-items: center; gap: 22px; flex: 1; color: #b9bbc1; font-size: 14px; }
.aicoin-links a { position: relative; white-space: nowrap; }
.aicoin-links a:hover, .aicoin-links .ai-link { color: #fff; }
.aicoin-links i { position: absolute; top: -11px; right: -11px; padding: 2px 4px; border-radius: 2px; background: #f14140; color: #fff; font-size: 9px; font-style: normal; }
.aicoin-links sup { margin-left: 2px; color: var(--blue); }
.aicoin-actions { display: flex; align-items: center; gap: 15px; color: #b9bbc1; }
.simple-mode { padding: 10px 15px; border: 1px solid #4a4d54; border-radius: 8px; background: #0e1012; color: #fff; font-size: 13px; cursor: pointer; }
.download-icon, .account-icon { color: #9fa1a7; font-size: 25px; }
.account-icon { border: 0; background: transparent; cursor: pointer; }
.mobile-menu { display: none; border: 0; background: transparent; color: #fff; font-size: 22px; }

.aicoin-hero { position: relative; min-height: 840px; padding: 150px 24px 0; isolation: isolate; background: #050607; text-align: center; }
.hero-orb { position: absolute; z-index: -1; border-radius: 50%; filter: blur(100px); opacity: .24; }
.orb-a { top: 250px; left: 12%; width: 420px; height: 240px; background: #1a5fff; }
.orb-b { top: 280px; right: 9%; width: 360px; height: 260px; background: #7b2cff; }
.hero-copy { position: relative; z-index: 1; max-width: 1180px; margin: auto; }
.hero-kicker, .section-label { color: var(--blue); font-size: 13px; font-weight: 700; letter-spacing: .22em; }
.hero-copy h1 { margin: 18px 0 24px; color: transparent; background: linear-gradient(100deg,#d8d9da 12%,#fff 30%,#52c5ff 50%,#563dfc 73%,#fff 95%); background-clip: text; font-size: 64px; font-weight: 800; letter-spacing: -2px; line-height: 1.18; -webkit-background-clip: text; }
.hero-copy h1 span { display: inline; }
.hero-copy p { max-width: 1040px; margin: 0 auto 35px; color: #9d9fa5; font-size: 17px; line-height: 2; }
.gradient-button { display: inline-flex; align-items: center; gap: 23px; padding: 14px 28px; border: 1px solid #33353b; border-radius: 999px; background: linear-gradient(135deg,rgba(82,197,255,.04),rgba(86,61,252,.06)); color: var(--blue); font-weight: 700; transition: .2s; }
.gradient-button:hover { border-color: var(--blue); box-shadow: 0 0 30px rgba(82,197,255,.18); transform: translateY(-2px); }
.gradient-button b { font-size: 19px; }
.hero-dashboard { position: relative; display: block; width: min(1180px,90vw); margin: 78px auto 0; border: 1px solid #22252c; border-radius: 14px; box-shadow: 0 30px 70px rgba(0,0,0,.5); }

.aicoin-section { max-width: 1180px; margin: auto; padding: 125px 24px; }
.intro-section { text-align: center; }
.intro-section h2, .image-copy h2, .cta-section h2, .download-feature h2 { margin: 16px 0; font-size: 42px; letter-spacing: -1px; }
.section-lead, .image-copy p, .cta-section p, .download-feature p { max-width: 680px; margin: 0 auto; color: #888b92; font-size: 16px; line-height: 1.9; }
.tool-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; margin-top: 55px; text-align: left; }
.tool-grid article { padding: 30px; border: 1px solid #25272c; border-radius: 16px; background: linear-gradient(145deg,#101215,#090a0c); }
.tool-icon { width: 44px; height: 44px; display: grid; place-items: center; margin-bottom: 20px; border-radius: 12px; font-size: 25px; }
.tool-icon.blue { background: #142d47; color: var(--blue); }
.tool-icon.purple { background: #2b1d52; color: #a989ff; }
.tool-icon.pink { background: #4c1f3e; color: #f88cc4; }
.tool-grid h3 { margin: 0 0 9px; font-size: 20px; }
.tool-grid p { margin: 0; color: #85888e; font-size: 14px; line-height: 1.7; }
.image-section { display: grid; grid-template-columns: .72fr 1.28fr; gap: 55px; align-items: center; }
.image-copy p { margin: 0 0 25px; }
.text-button { color: var(--blue); font-weight: 700; }
.image-section img { width: 100%; border: 1px solid #272a31; border-radius: 14px; box-shadow: 0 18px 55px rgba(0,0,0,.45); }
.metrics-section { display: grid; grid-template-columns: repeat(4,1fr); max-width: none; padding: 70px max(24px,calc((100vw - 1180px)/2)); border-top: 1px solid #24262b; border-bottom: 1px solid #24262b; background: #0b0c0e; text-align: center; }
.metrics-section strong { display: block; color: var(--blue); font-size: 42px; }
.metrics-section span { display: block; margin-top: 10px; color: #85878e; font-size: 13px; }
.cta-section { display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.cta-section p { margin: 0; }
.cta-section .gradient-button { flex: 0 0 auto; }
.aicoin-sticky { position: fixed; right: 0; bottom: 0; left: 0; z-index: 40; min-height: 78px; display: flex; align-items: center; justify-content: space-between; padding: 0 max(25px,calc((100vw - 1180px)/2)); border: 1px solid #dfe1e5; border-bottom: 0; border-radius: 14px 14px 0 0; background: rgba(248,248,249,.97); color: #1b1d23; box-shadow: 0 -10px 30px rgba(0,0,0,.28); }
.aicoin-sticky span { font-size: 18px; }
.aicoin-sticky span b { color: #1d57e9; }
.aicoin-sticky a { padding: 13px 23px; border-radius: 999px; background: linear-gradient(135deg,#52c5ff,#563dfc); color: #fff; font-weight: 800; }
.aicoin-footer { padding: 25px 18px 105px; border-top: 1px solid #24262b; background: #08090b; color: #7d8087; font-size: 12px; line-height: 1.9; text-align: center; }
.aicoin-footer strong { display: block; color: #d7d8db; font-size: 13px; }

.download-main { background: #000; }
.download-hero { min-height: 980px; padding: 115px 22px 130px; background: #000; text-align: center; }
.download-title > span { display: block; color: transparent; background: linear-gradient(#acadae,#fff); background-clip: text; font-size: 78px; font-weight: 600; line-height: 1; -webkit-background-clip: text; }
.download-title h1 { margin: 10px 0 38px; color: transparent; background: linear-gradient(100deg,#52c5ff,#563dfc); background-clip: text; font-size: 76px; line-height: 1.1; -webkit-background-clip: text; }
.download-title p { margin: 0; color: #7d7e7f; font-size: 22px; }
.download-grid { display: grid; grid-template-columns: repeat(4,212px); justify-content: center; gap: 70px 35px; max-width: 1170px; margin: 100px auto 0; }
.download-card { position: relative; width: 212px; height: 212px; display: flex; flex-direction: column; align-items: center; justify-content: flex-start; overflow: visible; border: 1px solid #34353c; border-radius: 24px; background: #000; color: #e8e8e8; cursor: pointer; transition: .25s; }
.download-card:hover, .download-card.current { border-color: var(--blue); background: #1a1b1f; box-shadow: 0 0 25px rgba(82,197,255,.08); }
.download-card label { position: absolute; top: -20px; left: 50%; padding: 9px 18px; transform: translateX(-50%); border: 1px solid #34353c; border-radius: 18px; background: #000; color: #0f8cff; font-size: 13px; white-space: nowrap; }
.platform-icon { width: 46px; height: 46px; display: grid; place-items: center; margin-top: 38px; color: #e8e8e8; font-size: 42px; font-weight: 900; }
.platform-icon img { width: 46px; height: 46px; border-radius: 50%; object-fit: contain; }
.platform-icon.mac { font-size: 32px; }
.platform-icon.android { font-size: 37px; }
.platform-icon.apple { font-size: 39px; }
.platform-icon.phone { font-size: 43px; }
.download-card strong { margin-top: 21px; font-size: 20px; font-weight: 600; line-height: 1; }
.download-card em { margin-top: 22px; color: #5e5f61; font-size: 14px; font-style: normal; line-height: 1; }
.card-hover { position: absolute; inset: 0; display: grid; place-items: center; border-radius: 24px; background: linear-gradient(135deg,rgba(82,197,255,.96),rgba(86,61,252,.96)); color: #fff; font-size: 17px; font-weight: 800; opacity: 0; transition: .2s; }
.download-card:hover .card-hover { opacity: 1; }
.history-button { margin-top: 42px; border: 0; background: transparent; color: #0f8cff; font-size: 14px; cursor: pointer; }
.download-feature { padding: 110px 24px; border-top: 1px solid #121419; background: #08090b; text-align: center; }
.download-feature img { display: block; width: min(1050px,90vw); margin: 58px auto 0; border: 1px solid #24262b; border-radius: 16px; opacity: .9; }
.download-feature.compact { padding-bottom: 190px; }
.download-feature.compact p { margin-bottom: 28px; }

@media (max-width: 1100px) {
  .aicoin-nav { gap: 16px; }
  .aicoin-links { gap: 15px; }
  .hero-copy h1 { font-size: 52px; }
  .download-grid { grid-template-columns: repeat(3,212px); }
}
@media (max-width: 700px) {
  .aicoin-header { height: 58px; }
  .aicoin-nav { justify-content: space-between; gap: 10px; padding: 0 16px; }
  .zhixin-header-link { width: 96px; height: 30px; margin-right: -20px; padding: 2px 6px; }
  .aicoin-brand { font-size: 13px; }
  .aicoin-mark { width: 29px; height: 29px; font-size: 12px; }
  .aicoin-brand small { font-size: 5px; }
  .aicoin-links { position: absolute; top: 67px; right: 12px; left: 12px; display: none; flex-direction: column; align-items: stretch; gap: 0; padding: 10px; border: 1px solid #282b31; border-radius: 12px; background: #111316; box-shadow: 0 18px 40px rgba(0,0,0,.45); }
  .aicoin-links.is-open { display: flex; }
  .aicoin-links a { padding: 12px 10px; }
  .aicoin-actions { gap: 10px; }
  .simple-mode, .download-icon, .account-icon { display: none; }
  .mobile-menu { display: block; }
  .aicoin-hero { min-height: 720px; padding: 75px 18px 0; }
  .hero-kicker { font-size: 9px; }
  .hero-copy h1 { font-size: 35px; line-height: 1.28; letter-spacing: -1px; }
  .hero-copy h1 span { display: block; }
  .hero-copy p { margin-bottom: 25px; font-size: 13px; line-height: 2; }
  .hero-dashboard { width: 100%; margin-top: 60px; border-radius: 9px; }
  .aicoin-section { padding: 76px 18px; }
  .intro-section h2, .image-copy h2, .cta-section h2, .download-feature h2 { font-size: 28px; line-height: 1.3; }
  .section-lead, .image-copy p, .cta-section p, .download-feature p { font-size: 13px; }
  .tool-grid { grid-template-columns: 1fr; gap: 10px; margin-top: 30px; }
  .tool-grid article { padding: 22px; }
  .image-section { display: flex; flex-direction: column; gap: 30px; align-items: stretch; }
  .image-section img { order: 2; }
  .metrics-section { grid-template-columns: repeat(2,1fr); gap: 30px; padding: 50px 18px; }
  .metrics-section strong { font-size: 31px; }
  .cta-section { display: block; text-align: center; }
  .cta-section p { margin-bottom: 25px; }
  .aicoin-sticky { min-height: 62px; padding: 0 12px; }
  .aicoin-sticky span { font-size: 12px; }
  .aicoin-sticky a { padding: 10px 14px; font-size: 12px; }
  .aicoin-footer { padding-bottom: 82px; font-size: 10px; }
  .download-hero { min-height: 940px; padding: 70px 18px 100px; }
  .download-title > span { font-size: 42px; }
  .download-title h1 { margin: 10px 0 20px; font-size: 39px; }
  .download-title p { font-size: 13px; }
  .download-grid { grid-template-columns: 1fr; gap: 27px; margin-top: 75px; }
  .download-card { width: min(212px,72vw); margin: auto; }
  .download-feature { padding: 72px 18px; }
  .download-feature img { width: 100%; margin-top: 35px; }
  .download-feature.compact { padding-bottom: 150px; }
}