* { box-sizing: border-box; }

:root {
  --bg: #05070f;
  --glass: rgba(14, 19, 34, .62);
  --line: rgba(148, 170, 220, .14);
  --line-2: rgba(148, 170, 220, .24);
  --txt: #eef2ff;
  --mut: #8e9ab8;
  --gpt: #3ddc97;
  --claude: #e8825a;
  --brand: linear-gradient(100deg, #3b82f6, #6d5cf6 55%, #a855f7);
}

html, body { height: 100%; }

body {
  margin: 0;
  overflow: hidden;
  background: var(--bg);
  color: var(--txt);
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
.ic { width: 1em; height: 1em; display: inline-block; vertical-align: -.14em; flex: none; }

/* ---------- background ---------- */
.bg { position: fixed; inset: 0; z-index: 0; }
.bg img { width: 100%; height: 100%; object-fit: cover; object-position: center 70%; }
.bg::after {
  content: "";
  position: absolute; inset: 0;
  background:
    linear-gradient(180deg, rgba(4, 6, 15, .55) 0%, rgba(4, 6, 15, .1) 40%, rgba(4, 6, 15, .35) 78%, rgba(4, 6, 15, .85) 100%),
    linear-gradient(90deg, rgba(4, 6, 15, .92) 0%, rgba(4, 6, 15, .7) 38%, rgba(4, 6, 15, .2) 70%, rgba(4, 6, 15, .4) 100%);
}

/* ---------- page shell ---------- */
.page {
  position: relative; z-index: 1;
  height: 100vh; height: 100dvh;
  max-width: 1480px; margin: 0 auto;
  display: flex; flex-direction: column;
  gap: clamp(10px, 2vh, 26px);
  padding: clamp(14px, 2.6vh, 30px) clamp(20px, 4vw, 64px) clamp(14px, 2.8vh, 32px);
}

/* ---------- nav ---------- */
.nav { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand img {
  width: clamp(30px, 4.2vh, 40px); height: clamp(30px, 4.2vh, 40px);
  border-radius: 24%;
  box-shadow: 0 6px 20px rgba(37, 99, 235, .45);
}
.bn { font-size: clamp(14px, 2vh, 18px); font-weight: 700; letter-spacing: .2px; }
.btag {
  font-size: 12px; color: #b9c6ff;
  padding: 2px 8px; border-radius: 6px;
  background: rgba(99, 102, 241, .16); border: 1px solid rgba(129, 140, 248, .28);
}
.nav-r { display: flex; align-items: center; gap: clamp(10px, 1.4vw, 20px); font-size: 13px; }
.status { display: inline-flex; align-items: center; gap: 8px; color: var(--mut); }
.status i, .conn i {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--gpt); box-shadow: 0 0 0 3px rgba(61, 220, 151, .18);
}
.nav-link {
  padding: 7px 16px; border-radius: 999px;
  border: 1px solid var(--line-2); background: rgba(255, 255, 255, .04);
  color: #dbe3ff; transition: background .2s, border-color .2s;
}
.nav-link:hover { background: rgba(255, 255, 255, .1); border-color: rgba(148, 170, 220, .4); }

/* ---------- hero grid ---------- */
.hero {
  flex: 1; min-height: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.08fr);
  grid-template-rows: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 72px);
}
.copy {
  align-self: center;
  display: flex; flex-direction: column; align-items: flex-start;
  gap: clamp(10px, 2.1vh, 22px);
}
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: 999px;
  font-size: clamp(11px, 1.6vh, 13px); color: #c7d2fe;
  background: rgba(99, 102, 241, .12); border: 1px solid rgba(129, 140, 248, .3);
}
.eyebrow .ic { color: #a5b4fc; }

h1 {
  margin: 0;
  font-size: clamp(30px, 6vh, 60px);
  line-height: 1.18;
  font-weight: 800;
  letter-spacing: .5px;
}
h1 .grad {
  background: linear-gradient(100deg, #7cb4ff, #8b7bff 50%, #d6b4ff);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.sub {
  margin: 0; max-width: 34em;
  color: #a6b1cc; font-size: clamp(13px, 1.9vh, 16px); line-height: 1.75;
}

/* ---------- model tags ---------- */
.models { display: flex; flex-direction: column; gap: clamp(6px, 1.1vh, 10px); }
.mgroup { display: flex; align-items: center; flex-wrap: wrap; gap: 6px; }
.mlabel {
  display: inline-flex; align-items: center; gap: 6px;
  width: 70px; font-size: 13px; font-weight: 600;
}
.mlabel .ic { font-size: 16px; }
.tag {
  padding: clamp(3px, .55vh, 5px) 9px; border-radius: 7px;
  font-size: clamp(11px, 1.5vh, 12.5px);
  border: 1px solid; white-space: nowrap;
}
.gpt .mlabel { color: #bdf5dc; }
.gpt .mlabel .ic { color: var(--gpt); }
.gpt .tag { color: #c8f7e1; background: rgba(61, 220, 151, .08); border-color: rgba(61, 220, 151, .22); }
.claude .mlabel { color: #ffd9c7; }
.claude .mlabel .ic { color: var(--claude); }
.claude .tag { color: #ffe1d2; background: rgba(232, 130, 90, .08); border-color: rgba(232, 130, 90, .24); }

/* ---------- CTA ---------- */
.cta-row { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; margin-top: clamp(2px, .6vh, 8px); }
.cta {
  display: inline-flex; align-items: center; gap: 10px;
  height: clamp(44px, 6.6vh, 56px); padding: 0 clamp(22px, 2.2vw, 34px);
  border-radius: 14px;
  background: var(--brand);
  color: #fff; font-weight: 700; font-size: clamp(14px, 2vh, 17px); letter-spacing: .5px;
  box-shadow: 0 12px 32px rgba(99, 102, 241, .42), inset 0 1px 0 rgba(255, 255, 255, .28);
  transition: transform .2s, box-shadow .2s, filter .2s;
}
.cta .ic { font-size: 1.2em; }
.cta:hover { transform: translateY(-2px); filter: brightness(1.08); box-shadow: 0 16px 40px rgba(124, 58, 237, .55), inset 0 1px 0 rgba(255, 255, 255, .28); }
.trial {
  display: inline-flex; align-items: center; gap: 8px;
  height: clamp(44px, 6.6vh, 56px); padding: 0 clamp(16px, 1.6vw, 24px);
  border-radius: 14px;
  border: 1px solid var(--line-2);
  background: rgba(255, 255, 255, .05); backdrop-filter: blur(8px);
  color: #e6ebff; font-weight: 600; font-size: clamp(13px, 1.85vh, 15px);
  transition: background .2s, border-color .2s;
}
.trial .ic:first-child { color: #fbb185; font-size: 1.1em; }
.trial .ic:last-child { font-size: .95em; opacity: .7; transition: transform .2s; }
.trial:hover { background: rgba(255, 255, 255, .1); border-color: rgba(148, 170, 220, .42); }
.trial:hover .ic:last-child { transform: translateX(3px); }

.plats { display: flex; align-items: center; flex-wrap: wrap; gap: 6px 14px; font-size: clamp(11px, 1.55vh, 13px); color: var(--mut); }
.plabel { margin-right: -4px; }
.pbtn {
  display: inline-flex; align-items: center; gap: 6px;
  color: #b6c1de; padding: 3px 0;
  border-bottom: 1px solid transparent;
  transition: color .2s, border-color .2s;
}
.pbtn .ic { font-size: 1.15em; }
.pbtn:hover { color: #fff; border-bottom-color: rgba(148, 170, 220, .5); }
.pbtn.on { color: #fff; }
.pbtn.on::after { content: "推荐"; font-size: 10px; padding: 1px 5px; border-radius: 4px; background: rgba(124, 58, 237, .35); color: #e9ddff; }

/* ---------- stats ---------- */
.stats {
  display: flex; gap: clamp(20px, 3vw, 44px);
  padding-top: clamp(8px, 1.8vh, 18px); margin-top: clamp(0px, .4vh, 6px);
  border-top: 1px solid var(--line);
}
.stats b { display: block; font-size: clamp(17px, 2.8vh, 24px); font-weight: 800; letter-spacing: .3px; }
.stats span { display: block; font-size: clamp(11px, 1.5vh, 12.5px); color: var(--mut); margin-top: 2px; }
/* ---------- visual: app window ---------- */
.visual {
  position: relative; min-height: 0;
  display: flex; align-items: center; justify-content: center;
  container-type: size;
}
/* 窗口按可用宽高中较小者等比缩放，内部尺寸全部用 em 跟随 */
.device {
  position: relative;
  width: min(92cqw, 82cqh * 1.42);
  container-type: inline-size;
}
.glow {
  position: absolute; inset: 8% 6%;
  background: radial-gradient(closest-side, rgba(59, 130, 246, .32), rgba(124, 58, 237, .14) 55%, transparent);
  filter: blur(20px);
  animation: pulse 7s ease-in-out infinite;
}
.window {
  position: relative; z-index: 1;
  width: 100%; aspect-ratio: 1.42;
  border-radius: 16px;
  background: rgba(10, 14, 26, .86);
  border: 1px solid rgba(148, 170, 220, .2);
  box-shadow: 0 40px 90px rgba(0, 0, 0, .55), 0 0 0 1px rgba(255, 255, 255, .03) inset, 0 0 80px rgba(59, 130, 246, .16);
  backdrop-filter: blur(16px);
  display: flex; flex-direction: column; overflow: hidden;
  font-size: clamp(9px, 2.05cqw, 14px);
}
.tbar {
  position: relative; display: flex; align-items: center; justify-content: center;
  height: 2.9em; border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, .02);
}
.dots { position: absolute; left: 1.1em; display: flex; gap: .5em; }
.dots i { width: .85em; height: .85em; border-radius: 50%; }
.dots i:nth-child(1) { background: #ff5f57; }
.dots i:nth-child(2) { background: #febc2e; }
.dots i:nth-child(3) { background: #28c840; }
.ttitle { color: #a9b5d4; font-weight: 600; }

.wbody { flex: 1; display: grid; grid-template-columns: 30% minmax(0, 1fr); min-height: 0; }
.side {
  border-right: 1px solid var(--line); background: rgba(255, 255, 255, .015);
  padding: .9em .75em; display: flex; flex-direction: column; gap: .25em;
  min-height: 0; overflow: hidden;
}
.newbtn {
  display: flex; align-items: center; justify-content: center; gap: .4em;
  padding: .6em; margin-bottom: .6em; border-radius: .6em;
  border: 1px solid var(--line-2); color: #dbe3ff; font-weight: 600;
}
.slabel { font-size: .82em; color: #6f7b99; letter-spacing: .1em; padding: 0 .5em .3em; }
.mrow {
  display: flex; align-items: center; gap: .6em;
  padding: .5em .6em; border-radius: .55em;
  color: #aeb9d6; white-space: nowrap; overflow: hidden;
}
.mrow .ic { font-size: 1.15em; }
.mrow.g .ic { color: var(--gpt); }
.mrow.c .ic { color: var(--claude); }
.mrow.on { background: rgba(99, 102, 241, .16); color: #fff; box-shadow: inset 0 0 0 1px rgba(129, 140, 248, .3); }

.chat { display: flex; flex-direction: column; min-width: 0; min-height: 0; padding: .9em 1.2em 1.1em; gap: 1em; }
.chat-hd { display: flex; align-items: center; justify-content: space-between; }
.mpill {
  display: inline-flex; align-items: center; gap: .45em;
  padding: .3em .8em; border-radius: 999px;
  color: #a7f0cf; background: rgba(61, 220, 151, .1); border: 1px solid rgba(61, 220, 151, .26);
}
.conn { display: inline-flex; align-items: center; gap: .55em; color: var(--mut); font-size: .9em; }
.conn i { width: .6em; height: .6em; }

.msgs { flex: 1; min-height: 0; overflow: hidden; display: flex; flex-direction: column; gap: 1em; }
.msg.user {
  align-self: flex-end; max-width: 75%;
  padding: .65em 1em; border-radius: 1em 1em .3em 1em;
  background: var(--brand); color: #fff;
}
.msg.ai { display: flex; gap: .7em; align-items: flex-start; min-width: 0; }
.avatar {
  flex: none; width: 2em; height: 2em; border-radius: 50%;
  display: grid; place-items: center;
  background: rgba(61, 220, 151, .12); color: var(--gpt); border: 1px solid rgba(61, 220, 151, .28);
}
.ai-body { min-width: 0; flex: 1; color: #d6ddf2; }
.ai-body p { margin: .3em 0 .6em; }
.ai-body pre {
  margin: 0; padding: .9em 1em; border-radius: .7em;
  background: rgba(0, 0, 0, .35); border: 1px solid var(--line);
  font: .92em/1.65 ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  color: #c9d3ee; overflow: hidden; white-space: pre;
}
.ai-body pre em { font-style: normal; color: #c792ea; }
.ai-body pre b { font-weight: 400; color: #82aaff; }

.inputbar {
  display: flex; align-items: center; gap: .8em;
  padding: .55em .55em .55em 1em; border-radius: .9em;
  border: 1px solid var(--line-2); background: rgba(255, 255, 255, .04);
  color: #6f7b99;
}
.send {
  margin-left: auto; width: 2.3em; height: 2.3em; border-radius: .65em;
  display: grid; place-items: center;
  background: var(--brand); color: #fff;
}
/* ---------- floating badges ---------- */
.float {
  position: absolute; z-index: 2;
  display: flex; align-items: center; gap: .7em;
  padding: .8em 1.2em; border-radius: 1em;
  font-size: clamp(10px, 2.1cqw, 15px);
  backdrop-filter: blur(12px);
  box-shadow: 0 18px 40px rgba(0, 0, 0, .45);
  animation: bob 7s ease-in-out infinite;
}
.float .ic { font-size: 2em; }
.float b { display: block; font-size: 1.08em; letter-spacing: .3px; }
.float small { display: block; font-size: .78em; opacity: .72; margin-top: .15em; }
.f-gpt {
  left: -7%; bottom: -6%;
  background: linear-gradient(140deg, rgba(14, 70, 52, .86), rgba(8, 34, 28, .72));
  border: 1px solid rgba(61, 220, 151, .38); color: #d9fbe9;
}
.f-gpt .ic { color: var(--gpt); }
.f-claude {
  right: -6%; top: -8%;
  background: linear-gradient(140deg, rgba(110, 46, 28, .86), rgba(56, 24, 15, .72));
  border: 1px solid rgba(232, 130, 90, .42); color: #ffe4d6;
  animation-delay: -3.5s;
}
.f-claude .ic { color: var(--claude); }

/* ---------- feature strip ---------- */
.feats {
  display: grid; grid-template-columns: repeat(6, minmax(0, 1fr));
  margin: 0; padding: clamp(10px, 1.8vh, 18px) clamp(8px, 1vw, 16px);
  list-style: none;
  border-radius: 18px;
  background: var(--glass); border: 1px solid var(--line);
  backdrop-filter: blur(16px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, .3);
}
.feats li {
  display: flex; align-items: center; gap: clamp(8px, .8vw, 12px);
  padding: 0 clamp(8px, 1vw, 18px); min-width: 0;
}
.feats li + li { border-left: 1px solid var(--line); }
.fic {
  flex: none;
  width: clamp(30px, 4.4vh, 40px); height: clamp(30px, 4.4vh, 40px);
  border-radius: 10px; display: grid; place-items: center;
  font-size: clamp(15px, 2.2vh, 19px);
}
.fic.c1 { color: #facc15; background: rgba(250, 204, 21, .12); }
.fic.c2 { color: #5eead4; background: rgba(94, 234, 212, .11); }
.fic.c3 { color: #60a5fa; background: rgba(96, 165, 250, .13); }
.fic.c4 { color: #c084fc; background: rgba(192, 132, 252, .13); }
.fic.c5 { color: #fb7185; background: rgba(251, 113, 133, .13); }
.fic.c6 { color: #fb923c; background: rgba(251, 146, 60, .13); }
.feats div { min-width: 0; }
.feats b { display: block; font-size: clamp(12px, 1.75vh, 15px); white-space: nowrap; }
.feats small { display: block; color: var(--mut); font-size: clamp(10.5px, 1.4vh, 12px); margin-top: 2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

@keyframes bob { 50% { translate: 0 -8px; } }
@keyframes pulse { 50% { opacity: .7; scale: 1.05; } }
@media (prefers-reduced-motion: reduce) {
  .float, .glow { animation: none; }
}

/* ---------- responsive ---------- */
@media (max-width: 1280px) {
  .feats small { display: none; }
  .mlabel { width: auto; margin-right: 4px; }
}
@media (max-height: 760px) {
  .feats small { display: none; }
  .stats { display: none; }
}
@media (max-height: 620px) {
  .models { display: none; }
}
@media (max-width: 960px) {
  body { overflow: auto; }
  .page { height: auto; gap: 28px; }
  .hero { grid-template-columns: 1fr; grid-template-rows: auto; gap: 36px; }
  .visual { height: min(68vw, 460px); }
  .feats { grid-template-columns: repeat(3, minmax(0, 1fr)); row-gap: 14px; }
  .feats li:nth-child(4) { border-left: 0; }
  .feats small { display: block; }
  .models, .stats { display: flex; }
  .status { display: none; }
}
@media (max-width: 560px) {
  .page { padding: 16px 18px 24px; }
  .btag { display: none; }
  .nav-link { padding: 6px 12px; white-space: nowrap; }
  h1 { font-size: 34px; }
  .visual { height: 78vw; }
  .feats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .feats li { border-left: 0 !important; }
  .cta, .trial { width: 100%; justify-content: center; }
  .float { display: none; }
}