/* ============================================================
   Amita · Base：reset / 极光背景 / 导航 / 页脚 / 按钮 / 卡片 / 动效
   所有交互组件均带 hover 效果
   ============================================================ */
* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--t1);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ---------- 极光背景 ---------- */
.aurora {
  position: fixed;
  inset: 0;
  z-index: -2;
  overflow: hidden;
  pointer-events: none;
  background: var(--bg);
}
.aurora i {
  position: absolute;
  border-radius: 999px;
  filter: blur(90px);
  opacity: .5;
}
.aurora .o1 { width: 560px; height: 560px; left: -140px; top: -160px; background: radial-gradient(circle, rgba(124, 92, 255, .5), transparent 65%); animation: drift1 26s ease-in-out infinite alternate; }
.aurora .o2 { width: 640px; height: 640px; right: -180px; top: -120px; background: radial-gradient(circle, rgba(34, 211, 238, .34), transparent 65%); animation: drift2 32s ease-in-out infinite alternate; }
.aurora .o3 { width: 520px; height: 520px; left: 34%; bottom: -260px; background: radial-gradient(circle, rgba(192, 132, 252, .26), transparent 65%); animation: drift3 38s ease-in-out infinite alternate; }
@keyframes drift1 { to { transform: translate(90px, 60px) scale(1.12); } }
@keyframes drift2 { to { transform: translate(-70px, 90px) scale(.94); } }
@keyframes drift3 { to { transform: translate(60px, -70px) scale(1.08); } }

.aurora .grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .035) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse 90% 62% at 50% 0%, #000 40%, transparent 78%);
  mask-image: radial-gradient(ellipse 90% 62% at 50% 0%, #000 40%, transparent 78%);
}

@media (prefers-reduced-motion: reduce) {
  .aurora i { animation: none !important; }
  .rv { transition: none; opacity: 1; transform: none; }
}

/* ---------- 布局 ---------- */
.wrap { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

.section { padding: 96px 0; }
.section-head { max-width: 640px; margin: 0 auto 52px; text-align: center; }
.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--card);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--t2);
}
.kicker b { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.section-head h2 { margin-top: 18px; font-size: 34px; line-height: 1.25; letter-spacing: -.5px; }
.section-head p { margin-top: 12px; font-size: 15px; color: var(--t2); }

.gtext { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* ---------- 导航 ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(6, 8, 16, .72);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  height: 68px;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 28px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 21px;
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--t1);
  text-decoration: none;
}
.brand .gem {
  width: 28px; height: 28px;
  border-radius: 9px;
  background: var(--grad);
  display: grid; place-items: center;
  box-shadow: 0 0 20px rgba(124, 92, 255, .55);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.brand:hover .gem { transform: rotate(12deg) scale(1.06); box-shadow: 0 0 30px rgba(34, 211, 238, .6); }
.brand .gem svg { width: 15px; height: 15px; }
.brand small { font-size: 10px; font-weight: 700; letter-spacing: .22em; color: var(--t3); text-transform: uppercase; margin-top: 4px; }

.nav-links { display: flex; gap: 4px; margin-left: auto; }
.nav-link {
  position: relative;
  padding: 9px 15px;
  border-radius: 10px;
  color: var(--t2);
  font-size: 14.5px;
  font-weight: 600;
  text-decoration: none;
  transition: color .25s var(--ease), background .25s var(--ease);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 15px; right: 15px; bottom: 3px;
  height: 2px;
  border-radius: 2px;
  background: var(--grad);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform .32s var(--ease);
}
.nav-link:hover { color: var(--t1); background: rgba(255, 255, 255, .04); }
.nav-link:hover::after, .nav-link.is-active::after { transform: scaleX(1); }
.nav-link.is-active { color: var(--t1); }

.nav-cta { margin-left: 8px; }
.nav .btn { height: 40px; padding: 0 20px; font-size: 14px; }

/* ---------- 按钮（全部带 hover） ---------- */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 50px;
  padding: 0 28px;
  border: 0;
  border-radius: 999px;
  font-family: var(--font);
  font-size: 15px;
  font-weight: 700;
  color: var(--t1);
  text-decoration: none;
  cursor: pointer;
  overflow: hidden;
  white-space: nowrap;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease),
              background-color .25s var(--ease), border-color .25s var(--ease), color .25s var(--ease);
}
.btn:focus-visible { outline: 2px solid var(--brand-b); outline-offset: 3px; }

.btn-primary { background: var(--grad); color: #fff; box-shadow: var(--glow); }
/* 光泽 sheen */
.btn-primary::after {
  content: "";
  position: absolute;
  top: -10%; left: -75%;
  width: 45%; height: 120%;
  background: linear-gradient(100deg, transparent, rgba(255, 255, 255, .38), transparent);
  transform: skewX(-22deg);
  transition: left .55s var(--ease);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--glow-strong); }
.btn-primary:hover::after { left: 135%; }
.btn-primary:active { transform: translateY(0) scale(.985); }

.btn-ghost { background: transparent; border: 1px solid var(--line-2); }
.btn-ghost:hover {
  transform: translateY(-2px);
  border-color: rgba(124, 92, 255, .65);
  background: rgba(124, 92, 255, .08);
  box-shadow: 0 8px 26px rgba(124, 92, 255, .18);
}

.btn-lg { height: 56px; padding: 0 34px; font-size: 16px; }
.btn-sm { height: 38px; padding: 0 18px; font-size: 13.5px; }
.btn[disabled] { opacity: .45; cursor: not-allowed; }
.btn[disabled]:hover { transform: none; box-shadow: none; }

/* 文字链接 hover */
.tlink { position: relative; color: var(--brand-b); text-decoration: none; font-weight: 700; }
.tlink::after { content: " →"; transition: margin-left .25s var(--ease); }
.tlink:hover::after { margin-left: 5px; }

/* ---------- 玻璃卡片 ---------- */
.card {
  position: relative;
  border-radius: var(--r-card);
  border: 1px solid var(--line);
  background: var(--card);
  backdrop-filter: blur(14px);
  transition: transform .3s var(--ease), border-color .3s var(--ease), background .3s var(--ease), box-shadow .3s var(--ease);
}
.card:hover { transform: translateY(-6px); border-color: rgba(124, 92, 255, .38); background: var(--card-2); box-shadow: 0 22px 48px rgba(0, 0, 0, .4), 0 0 0 1px rgba(124, 92, 255, .12); }

/* spotlight：radial 光斑跟随鼠标（layout.js 写入 --mx/--my） */
.spot { position: relative; overflow: hidden; }
.spot::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(320px circle at var(--mx, 50%) var(--my, 50%), rgba(124, 92, 255, .16), transparent 65%);
  opacity: 0;
  transition: opacity .3s var(--ease);
  pointer-events: none;
}
.spot:hover::before { opacity: 1; }

/* 流光描边（hover 时旋转） */
@property --ang { syntax: "<angle>"; initial-value: 0deg; inherits: false; }
.gborder { position: relative; }
.gborder::after {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: conic-gradient(from var(--ang), transparent 0 62%, var(--brand-a) 80%, var(--brand-b) 92%, transparent 100%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity .3s var(--ease);
  pointer-events: none;
}
.gborder:hover::after { opacity: 1; animation: spin-border 2.6s linear infinite; }
@keyframes spin-border { to { --ang: 360deg; } }

/* 图标徽章 */
.icard {
  width: 46px; height: 46px;
  border-radius: 13px;
  display: grid; place-items: center;
  background: var(--grad-soft);
  border: 1px solid rgba(124, 92, 255, .3);
  color: var(--brand-b);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.icard svg { width: 22px; height: 22px; }
.card:hover .icard, .ag-card:hover .icard { transform: scale(1.1) rotate(-4deg); box-shadow: 0 0 22px rgba(124, 92, 255, .35); }

/* ---------- 芯片 / 标签 ---------- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--t2);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all .25s var(--ease);
}
.chip:hover { color: var(--t1); border-color: rgba(124, 92, 255, .5); transform: translateY(-2px); box-shadow: 0 6px 18px rgba(124, 92, 255, .15); }
.chip.is-on { background: var(--grad); border-color: transparent; color: #fff; box-shadow: 0 6px 20px rgba(124, 92, 255, .35); }

.tag {
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  background: rgba(124, 92, 255, .1);
  border: 1px solid rgba(124, 92, 255, .26);
  color: #b9a6ff;
}
.tag.is-cyan { background: rgba(34, 211, 238, .08); border-color: rgba(34, 211, 238, .3); color: #7ee6f7; }

/* ---------- 渐变头像球 ---------- */
.orb-avatar {
  border-radius: 999px;
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 800;
  flex: none;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .35), 0 6px 18px rgba(0, 0, 0, .35);
}

/* ---------- 滚动显现 ---------- */
.rv { opacity: 0; transform: translateY(28px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.rv.in { opacity: 1; transform: none; }
.rv-d1 { transition-delay: .08s; } .rv-d2 { transition-delay: .16s; } .rv-d3 { transition-delay: .24s; }

/* ---------- 页脚 ---------- */
.footer { border-top: 1px solid var(--line); background: rgba(6, 8, 16, .6); margin-top: 40px; }
.footer-grid {
  max-width: 1200px;
  margin: 0 auto;
  padding: 56px 24px 40px;
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 40px;
}
.footer h5 { font-size: 13px; letter-spacing: .12em; text-transform: uppercase; color: var(--t3); margin-bottom: 16px; }
.footer-col a { display: block; padding: 5px 0; color: var(--t2); text-decoration: none; font-size: 14px; transition: color .2s, transform .25s var(--ease); }
.footer-col a:hover { color: var(--t1); transform: translateX(4px); }
.footer-brand p { margin-top: 12px; font-size: 13.5px; color: var(--t3); max-width: 300px; }
.footer-bottom { border-top: 1px solid var(--line); }
.footer-bottom div {
  max-width: 1200px; margin: 0 auto; padding: 18px 24px;
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  font-size: 12.5px; color: var(--t3);
}

/* ---------- Toast ---------- */
.toast-wrap { position: fixed; top: 84px; left: 50%; transform: translateX(-50%); z-index: 900; display: flex; flex-direction: column; align-items: center; gap: 8px; pointer-events: none; }
.toast { padding: 11px 22px; border-radius: 999px; background: rgba(17, 22, 38, .95); border: 1px solid rgba(124, 92, 255, .35); color: var(--t1); font-size: 13.5px; font-weight: 600; box-shadow: 0 14px 40px rgba(0, 0, 0, .4); animation: toast-in .3s var(--ease); max-width: 78vw; }
.toast.is-err { border-color: rgba(248, 113, 113, .5); }
.toast.is-out { opacity: 0; transform: translateY(-8px); transition: all .35s var(--ease); }
@keyframes toast-in { from { opacity: 0; transform: translateY(-10px); } to { opacity: 1; transform: translateY(0); } }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .nav-links { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .section { padding: 64px 0; }
  .section-head h2 { font-size: 27px; }
}
@media (max-width: 560px) {
  .footer-grid { grid-template-columns: 1fr; }
}