:root {
  --ice: #6ee7ff;
  --cyan: #00d4c8;
  --cyan-soft: rgba(0, 212, 200, 0.55);
  --cyan-dim: rgba(0, 212, 200, 0.18);
  --bg-deep: #05070a;
  --bg-mid: #0b1116;
  --glass: rgba(18, 24, 30, 0.50);
  --glass-strong: rgba(22, 30, 37, 0.68);
  --glass-border: rgba(255, 255, 255, 0.10);
  --glass-border-cyan: rgba(0, 212, 200, 0.30);
  --text: #e8f2f2;
  --text-dim: #8a97a1;
  --r: 21px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text);
  background: var(--bg-deep);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ===== 背景层 ===== */
.bg { position: fixed; inset: 0; z-index: -2; overflow: hidden; }
.bg-gradient {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, #05070a 0%, #0b1116 48%, #101a20 72%, #0a0f14 100%);
}
.silk { position: absolute; left: 0; right: 0; bottom: 0; width: 100%; height: 42vh; }
.silk-path { fill: none; stroke: var(--cyan); stroke-width: 2.5; stroke-linecap: round; }
.silk-1 { filter: blur(14px); opacity: 0.45; animation: silkDrift 12s ease-in-out infinite alternate; }
.silk-2 { filter: blur(6px);  opacity: 0.65; animation: silkDrift 18s ease-in-out infinite alternate-reverse; }
.silk-3 { filter: blur(1px);  opacity: 0.85; animation: silkDrift 15s ease-in-out infinite alternate; }
@keyframes silkDrift {
  0%   { transform: translateX(0) translateY(0) scaleX(1.05); }
  50%  { transform: translateX(-3%) translateY(-2%) scaleX(1.15); }
  100% { transform: translateX(2%) translateY(1.5%) scaleX(1.02); }
}
.grid-overlay {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(110, 231, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(110, 231, 255, 0.045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, #000 30%, transparent 75%);
}
.glow { position: absolute; border-radius: 50%; filter: blur(100px); opacity: 0.5; }
.glow-1 { width: 500px; height: 500px; top: -140px; right: -100px; background: rgba(0, 212, 200, 0.20); }
.glow-2 { width: 400px; height: 400px; bottom: 60px; left: -120px; background: rgba(110, 231, 255, 0.14); }

/* ===== 导航 ===== */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  background: rgba(8, 12, 16, 0.55);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}
.nav-inner { max-width: 1200px; margin: 0 auto; padding: 16px 28px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 15px; height: 15px; background: linear-gradient(135deg, var(--ice), var(--cyan));
  clip-path: polygon(0 0, 100% 0, 100% 30%, 30% 100%, 0 100%);
  box-shadow: 0 0 14px var(--cyan-soft);
}
.brand-name { font-weight: 650; letter-spacing: 0.4px; font-size: 16.5px; }
.nav-links { display: flex; gap: 24px; align-items: center; }
.nav-links a {
  color: var(--text-dim); font-size: 14px; transition: color .2s; position: relative;
}
.nav-links a:hover, .nav-links a.active { color: var(--cyan); }
.lang-toggle {
  cursor: pointer; border: 1px solid var(--glass-border); background: var(--glass);
  color: var(--text); font-size: 12.5px; padding: 6px 13px; border-radius: 999px;
  transition: all .2s; backdrop-filter: blur(10px);
}
.lang-toggle:hover { border-color: var(--cyan-soft); color: var(--cyan); }
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 4px; background: none; border: 0; }
.hamburger span { width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: .25s; }

/* ===== 通用容器 / 排版 ===== */
.wrap { max-width: 1200px; margin: 0 auto; padding: 72px 28px 120px; }
.wrap-narrow { max-width: 860px; }
.section { padding: 72px 0; }
.eyebrow { color: var(--cyan); font-size: 13px; letter-spacing: 4px; text-transform: uppercase; margin-bottom: 14px; }
.h1 {
  font-size: clamp(34px, 6vw, 58px); font-weight: 750; letter-spacing: 0.5px; line-height: 1.14;
  background: linear-gradient(120deg, #eafdfb 0%, var(--cyan) 55%, var(--ice) 100%);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.h2 { font-size: clamp(26px, 4vw, 38px); font-weight: 700; letter-spacing: 0.4px; line-height: 1.2; }
.h2 .grad { background: linear-gradient(120deg, #eafdfb, var(--cyan)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.lead { color: var(--text-dim); margin-top: 14px; font-size: 16px; max-width: 640px; }
.sub { color: var(--text-dim); font-size: 14.5px; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex; align-items: center; gap: 8px; cursor: pointer;
  font-size: 15px; font-weight: 600; padding: 14px 30px; border-radius: 999px;
  border: 1px solid transparent; transition: transform .18s cubic-bezier(.2,.8,.2,1), box-shadow .25s, background .2s;
  -webkit-tap-highlight-color: transparent;
}
.btn:active { transform: scale(0.96); }
.btn-primary {
  color: #041014; background: linear-gradient(135deg, var(--ice), var(--cyan));
  box-shadow: 0 8px 26px rgba(0, 212, 200, 0.35);
}
.btn-primary:hover { box-shadow: 0 12px 36px rgba(0, 212, 200, 0.5); transform: translateY(-2px); }
.btn-ghost {
  color: var(--text); background: var(--glass); border-color: var(--glass-border-cyan);
  backdrop-filter: blur(12px);
}
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); }
.btn-lg { padding: 16px 38px; font-size: 16px; }

/* ===== 玻璃卡片 ===== */
.card {
  position: relative; background: var(--glass); border: 1px solid var(--glass-border);
  border-radius: var(--r); padding: 28px 26px; overflow: hidden;
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  box-shadow: 0 12px 40px rgba(0,0,0,0.42);
  transition: transform .3s cubic-bezier(.2,.8,.2,1), box-shadow .3s, border-color .3s;
}
.card:hover { transform: translateY(-6px); border-color: var(--glass-border-cyan); box-shadow: 0 0 30px rgba(0,212,200,0.25), 0 20px 54px rgba(0,0,0,0.5); }
.card .corner {
  position: absolute; top: 0; left: 0; width: 46px; height: 46px;
  background: linear-gradient(135deg, var(--cyan) 0%, rgba(0,212,200,0.22) 60%, transparent 75%);
  clip-path: polygon(0 0, 100% 0, 0 100%); opacity: 0.85;
}
.card .corner::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(135deg, #fff 0%, transparent 45%); opacity: 0.3;
}
.chip {
  display: inline-block; font-size: 12px; padding: 4px 12px; border-radius: 999px;
  color: var(--cyan); background: rgba(0,212,200,0.08); border: 1px solid rgba(0,212,200,0.22);
}
.icon-chip { display: inline-flex; align-items: center; justify-content: center; width: 46px; height: 46px; border-radius: 14px; font-size: 22px; background: rgba(0,212,200,0.08); border: 1px solid rgba(0,212,200,0.2); }

/* ===== Hero ===== */
.hero { padding: 96px 28px 60px; text-align: center; }
.hero .h1 { max-width: 900px; margin: 0 auto; }
.hero .lead { margin: 20px auto 34px; max-width: 680px; font-size: 17px; }
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ===== 图标一览 grid ===== */
.icon-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 18px; margin-top: 40px; }
.icon-cell {
  display: flex; flex-direction: column; align-items: center; gap: 10px; padding: 22px 12px;
  background: var(--glass); border: 1px solid var(--glass-border); border-radius: var(--r);
  backdrop-filter: blur(14px); transition: transform .25s, border-color .25s; text-align: center;
}
.icon-cell:hover { transform: translateY(-5px); border-color: var(--glass-border-cyan); }
.icon-cell .emoji { font-size: 26px; }
.icon-cell .t { font-size: 13px; color: var(--text-dim); }

/* ===== 优势 / 特性 ===== */
.grid-4 { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 22px; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 22px; }
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 22px; }
.feature h3 { font-size: 18px; font-weight: 650; margin-bottom: 8px; }
.feature p { color: var(--text-dim); font-size: 14.5px; }

/* ===== 服务页分组 ===== */
.svc-group { margin-bottom: 46px; }
.svc-group > h3 { font-size: 21px; font-weight: 700; margin-bottom: 6px; display: flex; align-items: center; gap: 10px; }
.svc-group > h3 .n { color: var(--cyan); font-size: 15px; font-weight: 700; letter-spacing: 1px; }
.svc-group > .svc-list { margin-top: 16px; }
.svc-item {
  display: flex; align-items: flex-start; gap: 14px; padding: 16px 18px; border-radius: 16px;
  border: 1px solid var(--glass-border); background: var(--glass); backdrop-filter: blur(12px);
  margin-bottom: 12px; transition: border-color .2s, transform .2s;
}
.svc-item:hover { border-color: var(--glass-border-cyan); transform: translateX(4px); }
.svc-item .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--cyan); margin-top: 7px; flex-shrink: 0; box-shadow: 0 0 10px var(--cyan-soft); }
.svc-item .name { font-weight: 600; font-size: 15.5px; }
.svc-item .desc { color: var(--text-dim); font-size: 13.5px; }

/* ===== Portfolio 筛选 ===== */
.filter-bar { display: flex; gap: 10px; flex-wrap: wrap; margin: 30px 0; }
.filter-btn {
  cursor: pointer; font-size: 13.5px; padding: 9px 18px; border-radius: 999px;
  border: 1px solid var(--glass-border); background: var(--glass); color: var(--text-dim);
  transition: all .2s; backdrop-filter: blur(10px);
}
.filter-btn:hover, .filter-btn.active { color: var(--cyan); border-color: var(--cyan-soft); }
.pf-card { cursor: pointer; }
.pf-thumb { height: 170px; border-radius: 15px; margin-bottom: 16px; background: linear-gradient(135deg, rgba(0,212,200,0.14), rgba(110,231,255,0.06)); border: 1px solid var(--glass-border); display: flex; align-items: center; justify-content: center; font-size: 44px; }
.pf-card h3 { font-size: 17px; font-weight: 650; margin-bottom: 6px; }
.pf-card p { color: var(--text-dim); font-size: 13.5px; }
.pf-meta { margin-top: 14px; display: flex; gap: 8px; flex-wrap: wrap; }

/* ===== Pricing ===== */
.price-card { display: flex; flex-direction: column; padding: 34px 28px; }
.price-card.featured { border-color: var(--glass-border-cyan); box-shadow: 0 0 34px rgba(0,212,200,0.28); }
.price-name { font-size: 18px; font-weight: 700; }
.price-tag { font-size: 15px; color: var(--text-dim); margin: 4px 0 20px; }
.price-amount { font-size: 42px; font-weight: 750; letter-spacing: -0.5px; }
.price-amount .cur { font-size: 20px; color: var(--cyan); vertical-align: super; }
.price-features { list-style: none; margin: 24px 0 30px; flex: 1; }
.price-features li { padding: 9px 0; font-size: 14.5px; color: var(--text-dim); border-bottom: 1px solid rgba(255,255,255,0.05); }
.price-features li::before { content: "✓ "; color: var(--cyan); font-weight: 700; }
.badge-flag { position: absolute; top: 18px; right: 18px; font-size: 11px; letter-spacing: 1px; padding: 5px 12px; border-radius: 999px; color: #041014; background: linear-gradient(135deg, var(--ice), var(--cyan)); font-weight: 700; }

/* ===== Blog ===== */
.blog-card .date { font-size: 12.5px; color: var(--cyan); letter-spacing: 1px; margin-bottom: 10px; }
.blog-card h3 { font-size: 18px; font-weight: 650; margin-bottom: 8px; }
.blog-card p { color: var(--text-dim); font-size: 14px; }

/* ===== 联系 ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1.3fr; gap: 30px; align-items: start; }
.contact-item { display: flex; align-items: center; gap: 14px; padding: 16px 18px; border-radius: 16px; border: 1px solid var(--glass-border); background: var(--glass); margin-bottom: 14px; backdrop-filter: blur(12px); }
.contact-item .emoji { font-size: 22px; }
.contact-item .lbl { font-size: 12.5px; color: var(--text-dim); }
.contact-item .val { font-weight: 600; font-size: 15px; word-break: break-all; }
.form fieldset { border: 0; }
.form input, .form textarea, .form select {
  width: 100%; padding: 14px 16px; margin-bottom: 16px; border-radius: 14px;
  border: 1px solid var(--glass-border); background: rgba(10,15,20,0.6); color: var(--text);
  font-size: 15px; font-family: inherit; outline: none; transition: border-color .2s;
}
.form input:focus, .form textarea:focus { border-color: var(--cyan-soft); }
.form textarea { min-height: 130px; resize: vertical; }
.form label { display: block; font-size: 13px; color: var(--text-dim); margin-bottom: 7px; }

/* ===== 合规页 ===== */
.prose h2 { font-size: 22px; font-weight: 700; margin: 34px 0 12px; }
.prose h3 { font-size: 17px; font-weight: 650; margin: 24px 0 8px; }
.prose p { color: var(--text-dim); margin-bottom: 14px; font-size: 15px; }
.prose ul { color: var(--text-dim); padding-left: 22px; margin-bottom: 14px; }
.prose li { margin-bottom: 8px; font-size: 14.5px; }
.prose .updated { font-size: 13px; color: var(--text-dim); margin-bottom: 30px; }

/* ===== CTA 横幅 ===== */
.cta-banner {
  text-align: center; padding: 60px 32px; border-radius: 26px;
  background: linear-gradient(135deg, rgba(0,212,200,0.12), rgba(110,231,255,0.07));
  border: 1px solid var(--glass-border-cyan); backdrop-filter: blur(18px);
}
.cta-banner h2 { font-size: clamp(24px, 4vw, 34px); font-weight: 750; margin-bottom: 12px; }
.cta-banner p { color: var(--text-dim); margin-bottom: 28px; }

/* ===== 页脚 ===== */
.footer { border-top: 1px solid rgba(255,255,255,0.07); padding: 54px 28px 40px; margin-top: 20px; }
.footer-inner { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 32px; }
.footer .brand-name { margin-bottom: 12px; display: inline-block; }
.footer p { color: var(--text-dim); font-size: 13.5px; }
.footer h4 { font-size: 14px; font-weight: 650; margin-bottom: 14px; color: var(--text); }
.footer a { display: block; color: var(--text-dim); font-size: 13.5px; margin-bottom: 9px; transition: color .2s; }
.footer a:hover { color: var(--cyan); }
.footer-bottom { max-width: 1200px; margin: 30px auto 0; padding-top: 24px; border-top: 1px solid rgba(255,255,255,0.06); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-size: 12.5px; color: var(--text-dim); }

/* ===== 响应式 ===== */
@media (max-width: 900px) {
  .contact-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .nav-links {
    position: fixed; inset: 0; top: 62px; flex-direction: column; align-items: flex-start;
    padding: 28px; gap: 22px; background: rgba(6,9,13,0.96); backdrop-filter: blur(24px);
    transform: translateX(100%); transition: transform .3s cubic-bezier(.2,.8,.2,1); z-index: 49;
  }
  .nav-links.open { transform: translateX(0); }
  .nav-links a { font-size: 18px; }
  .hamburger { display: flex; }
  .hero { padding: 64px 20px 40px; }
  .wrap { padding: 48px 20px 90px; }
  .footer-inner { grid-template-columns: 1fr; gap: 24px; }
  .icon-grid { grid-template-columns: repeat(3, 1fr); }
}


/* ===== nav actions ===== */
.nav-actions { display: flex; align-items: center; gap: 12px; }

/* ===== 滚动出现动效 ===== */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s cubic-bezier(.2,.8,.2,1); }
.reveal.in { opacity: 1; transform: translateY(0); }

/* ============================================================
   iOS 液态玻璃按钮（复刻 iOS 原生质感：扫光 + 按压回弹 + 跟手光晕）
   由 .btn 体系升级，JS 自动注入多层玻璃结构
   ============================================================ */
.btn {
  --px: 50%;
  --py: 36%;
  --dur: .34s;
  --ease: cubic-bezier(.22, 1, .36, 1);
  position: relative;
  isolation: isolate;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 52px;
  padding: 0 32px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: #fff;
  font-size: 15px;
  font-weight: 590;
  letter-spacing: .012em;
  line-height: 1;
  cursor: pointer;
  user-select: none;
  -webkit-user-select: none;
  text-decoration: none;
  transition: transform var(--dur) var(--ease);
  will-change: transform;
}
.btn:active { transform: scale(.955); }
.btn:focus { outline: none; }
.btn:focus-visible { outline: 2px solid rgba(255,255,255,.85); outline-offset: 4px; }

.btn__glass,
.btn__refract,
.btn__glow,
.btn__shine,
.btn__rim {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
}

/* 1. 玻璃主体：背景模糊 + 半透明渐变 */
.btn__glass {
  z-index: 0;
  overflow: hidden;
  backdrop-filter: blur(16px) saturate(190%) brightness(1.05);
  -webkit-backdrop-filter: blur(16px) saturate(190%) brightness(1.05);
  background:
    radial-gradient(140% 140% at var(--px) var(--py),
      rgba(255,255,255,.40) 0%,
      rgba(255,255,255,.10) 26%,
      rgba(255,255,255,.03) 52%,
      rgba(255,255,255,.08) 100%),
    linear-gradient(180deg,
      rgba(255,255,255,.30) 0%,
      rgba(255,255,255,.10) 42%,
      rgba(255,255,255,.04) 58%,
      rgba(255,255,255,.14) 100%);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.70),
    inset 0 -1px 0 rgba(255,255,255,.20),
    inset 1px 0 0 rgba(255,255,255,.16),
    inset -1px 0 0 rgba(255,255,255,.16),
    0 1px 1px rgba(0,0,0,.10),
    0 8px 20px -6px rgba(0,0,0,.40),
    0 22px 48px -16px rgba(0,0,0,.50);
  transition: backdrop-filter var(--dur) ease, -webkit-backdrop-filter var(--dur) ease, box-shadow var(--dur) ease;
}

/* primary 青蓝玻璃 tint */
.btn-primary .btn__glass {
  background:
    radial-gradient(140% 140% at var(--px) var(--py),
      rgba(255,255,255,.46) 0%,
      rgba(110,231,255,.32) 26%,
      rgba(0,212,200,.22) 52%,
      rgba(0,212,200,.10) 100%),
    linear-gradient(180deg,
      rgba(110,231,255,.42) 0%,
      rgba(0,212,200,.30) 42%,
      rgba(0,170,165,.16) 58%,
      rgba(110,231,255,.24) 100%);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.75),
    inset 0 -1px 0 rgba(255,255,255,.22),
    inset 1px 0 0 rgba(255,255,255,.18),
    inset -1px 0 0 rgba(255,255,255,.18),
    0 1px 1px rgba(0,0,0,.10),
    0 8px 22px -6px rgba(0,212,200,.45),
    0 22px 48px -16px rgba(0,0,0,.50);
}

/* ghost 中性玻璃（稍暗，适配深色背景的次要按钮） */
.btn-ghost .btn__glass {
  background:
    radial-gradient(140% 140% at var(--px) var(--py),
      rgba(255,255,255,.30) 0%,
      rgba(255,255,255,.08) 26%,
      rgba(255,255,255,.02) 52%,
      rgba(255,255,255,.06) 100%),
    linear-gradient(180deg,
      rgba(255,255,255,.18) 0%,
      rgba(255,255,255,.06) 42%,
      rgba(255,255,255,.02) 58%,
      rgba(255,255,255,.08) 100%);
}

/* 2. 边缘折射环（厚边） */
.btn__refract {
  z-index: 1;
  padding: 1.5px;
  backdrop-filter: blur(.5px) saturate(200%) brightness(1.55) contrast(1.1);
  -webkit-backdrop-filter: blur(.5px) saturate(200%) brightness(1.55) contrast(1.1);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  opacity: .95;
}

/* 3. 跟随光标的内发光 */
.btn__glow {
  z-index: 2;
  overflow: hidden;
  opacity: 0;
  transition: opacity .4s ease;
}
.btn.is-hover .btn__glow,
.btn.is-pressed .btn__glow { opacity: 1; }
.btn__glow::before {
  content: "";
  position: absolute;
  left: var(--px);
  top: var(--py);
  width: 150px;
  height: 150px;
  transform: translate(-50%, -50%);
  background: radial-gradient(closest-side, rgba(255,255,255,.55), rgba(255,255,255,0) 72%);
  filter: blur(6px);
}

/* 4. 点击扫光 */
.btn__shine { z-index: 3; overflow: hidden; }
.btn__shine::before {
  content: "";
  position: absolute;
  top: -30%;
  bottom: -30%;
  left: 0;
  width: 52%;
  background: linear-gradient(100deg,
    rgba(255,255,255,0) 0%,
    rgba(255,255,255,.85) 50%,
    rgba(255,255,255,0) 100%);
  transform: translateX(-220%) skewX(-16deg);
  filter: blur(3px);
  opacity: 0;
}
.btn.is-shine .btn__shine::before {
  animation: sweep .9s cubic-bezier(.22,1,.36,1) forwards;
}
@keyframes sweep {
  0%   { opacity: 0; transform: translateX(-220%) skewX(-16deg); }
  14%  { opacity: .95; }
  100% { opacity: 0; transform: translateX(330%) skewX(-16deg); }
}

/* 5. 外侧高光描边 */
.btn__rim {
  z-index: 4;
  padding: 1px;
  background: linear-gradient(160deg,
    rgba(255,255,255,.95) 0%,
    rgba(255,255,255,.30) 22%,
    rgba(255,255,255,.06) 48%,
    rgba(255,255,255,.10) 72%,
    rgba(255,255,255,.60) 100%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  opacity: .9;
}

/* 6. 文字 */
.btn__label {
  position: relative;
  z-index: 5;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  text-shadow: 0 1px 2px rgba(0,0,0,.15);
}

/* 悬停 / 按压状态 */
@media (hover: hover) {
  .btn:hover .btn__glass {
    backdrop-filter: blur(18px) saturate(200%) brightness(1.10);
    -webkit-backdrop-filter: blur(18px) saturate(200%) brightness(1.10);
  }
}
.btn.is-pressed .btn__glass {
  backdrop-filter: blur(20px) saturate(210%) brightness(1.18);
  -webkit-backdrop-filter: blur(20px) saturate(210%) brightness(1.18);
  background:
    radial-gradient(150% 150% at var(--px) var(--py),
      rgba(255,255,255,.55) 0%,
      rgba(255,255,255,.16) 30%,
      rgba(255,255,255,.06) 60%,
      rgba(255,255,255,.12) 100%),
    linear-gradient(180deg,
      rgba(255,255,255,.34) 0%,
      rgba(255,255,255,.12) 45%,
      rgba(255,255,255,.06) 60%,
      rgba(255,255,255,.16) 100%);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.85),
    inset 0 -1px 2px rgba(255,255,255,.22),
    inset 0 8px 16px -10px rgba(0,0,0,.55),
    0 1px 1px rgba(0,0,0,.12),
    0 3px 10px -4px rgba(0,0,0,.45);
}
.btn-primary.is-pressed .btn__glass {
  background:
    radial-gradient(150% 150% at var(--px) var(--py),
      rgba(255,255,255,.55) 0%,
      rgba(110,231,255,.30) 30%,
      rgba(0,212,200,.22) 60%,
      rgba(0,212,200,.14) 100%),
    linear-gradient(180deg,
      rgba(110,231,255,.44) 0%,
      rgba(0,212,200,.32) 45%,
      rgba(0,170,165,.18) 60%,
      rgba(110,231,255,.26) 100%);
}

/* 大号按钮 */
.btn-lg { min-height: 58px; padding: 0 40px; font-size: 16px; }

/* 无障碍：降低动态效果 */
@media (prefers-reduced-motion: reduce) {
  .btn, .btn__glass, .btn__glow { transition-duration: .01ms; }
  .btn.is-shine .btn__shine::before { animation: none; }
}