/* ===== 摸了个鱼官网 · 样式表 ===== */
/* 双主题：深色 / 浅色，默认跟随系统 */

/* ---------- 深色主题（默认） ---------- */
:root {
  --bg: #0C1815;
  --bg-2: #101F1B;
  --card: #14241F;
  --card-2: #1A2E28;
  --stroke: rgba(255, 255, 255, .06);
  --stroke-2: rgba(255, 255, 255, .1);
  --accent: #45D4B0;
  --accent-2: #2EB896;
  --accent-soft: rgba(69, 212, 176, .1);
  --accent-line: rgba(69, 212, 176, .28);
  --gold: #D4B87A;
  --gold-2: #B89A5C;
  --gold-soft: rgba(212, 184, 122, .1);
  --gold-line: rgba(212, 184, 122, .28);
  --text: #EDE8DF;
  --text-2: #9AB0A8;
  --text-3: #6B857C;
  --radius: 16px;
  --radius-lg: 22px;
  --shadow-1: 0 1px 0 rgba(255,255,255,.03) inset, 0 10px 28px -12px rgba(0,0,0,.5);
  --shadow-2: 0 1px 0 rgba(255,255,255,.04) inset, 0 20px 48px -16px rgba(0,0,0,.6);
  --container: 1160px;
  --hero-glow-1: rgba(69, 212, 176, .08);
  --hero-glow-2: rgba(212, 184, 122, .05);
}

/* ---------- 浅色主题 ---------- */
[data-theme="light"] {
  --bg: #F4F1EA;
  --bg-2: #EDE9E0;
  --card: #FFFFFF;
  --card-2: #F8F6F1;
  --stroke: rgba(20, 36, 31, .07);
  --stroke-2: rgba(20, 36, 31, .12);
  --accent: #0E8F76;
  --accent-2: #0A7560;
  --accent-soft: rgba(14, 143, 118, .08);
  --accent-line: rgba(14, 143, 118, .25);
  --gold: #A8842E;
  --gold-2: #8A6B22;
  --gold-soft: rgba(168, 132, 46, .08);
  --gold-line: rgba(168, 132, 46, .25);
  --text: #1C2B26;
  --text-2: #4E665D;
  --text-3: #7A9088;
  --shadow-1: 0 1px 2px rgba(20,36,31,.04), 0 8px 24px -12px rgba(20,36,31,.1);
  --shadow-2: 0 1px 2px rgba(20,36,31,.05), 0 16px 40px -16px rgba(20,36,31,.12);
  --hero-glow-1: rgba(14, 143, 118, .06);
  --hero-glow-2: rgba(168, 132, 46, .04);
}

/* 跟随系统：未手动设置时 */
@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    --bg: #F4F1EA;
    --bg-2: #EDE9E0;
    --card: #FFFFFF;
    --card-2: #F8F6F1;
    --stroke: rgba(20, 36, 31, .07);
    --stroke-2: rgba(20, 36, 31, .12);
    --accent: #0E8F76;
    --accent-2: #0A7560;
    --accent-soft: rgba(14, 143, 118, .08);
    --accent-line: rgba(14, 143, 118, .25);
    --gold: #A8842E;
    --gold-2: #8A6B22;
    --gold-soft: rgba(168, 132, 46, .08);
    --gold-line: rgba(168, 132, 46, .25);
    --text: #1C2B26;
    --text-2: #4E665D;
    --text-3: #7A9088;
    --shadow-1: 0 1px 2px rgba(20,36,31,.04), 0 8px 24px -12px rgba(20,36,31,.1);
    --shadow-2: 0 1px 2px rgba(20,36,31,.05), 0 16px 40px -16px rgba(20,36,31,.12);
    --hero-glow-1: rgba(14, 143, 118, .06);
    --hero-glow-2: rgba(168, 132, 46, .04);
  }
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
html, body {
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background-color .35s ease, color .35s ease;
}
body { overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
::selection { background: var(--accent); color: var(--bg); }
img { max-width: 100%; display: block; }

/* ===== Layout ===== */
.container { max-width: var(--container); margin: 0 auto; padding: 0 28px; }

/* ===== Nav ===== */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--stroke);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 20px; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark {
  width: 32px; height: 32px; border-radius: 9px;
  background: var(--card);
  border: 1px solid var(--stroke-2);
  display: grid; place-items: center;
  box-shadow: var(--shadow-1);
}
.brand-mark img { width: 22px; height: 22px; object-fit: contain; }
.brand-name { font-family: "Noto Sans SC", sans-serif; font-weight: 700; font-size: 17px; letter-spacing: -.01em; }
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a { font-size: 14px; color: var(--text-2); transition: color .2s ease; }
.nav-links a:hover { color: var(--accent); }
.nav-actions { display: flex; align-items: center; gap: 10px; }

/* 主题切换按钮 */
.theme-toggle {
  width: 36px; height: 36px; border-radius: 50%;
  display: grid; place-items: center;
  border: 1px solid var(--stroke-2);
  color: var(--text-2);
  transition: all .25s ease;
  background: transparent;
}
.theme-toggle:hover { color: var(--accent); border-color: var(--accent-line); background: var(--accent-soft); }
.theme-toggle svg { width: 17px; height: 17px; }

.cta {
  display: inline-flex; align-items: center; gap: 7px;
  height: 38px; padding: 0 16px; border-radius: 999px;
  background: var(--accent); color: var(--bg);
  font-weight: 600; font-size: 14px;
  transition: transform .2s ease, opacity .2s ease;
}
.cta:hover { transform: translateY(-1px); opacity: .9; }
.cta svg { width: 15px; height: 15px; }
.cta-ghost {
  display: inline-flex; align-items: center; gap: 7px;
  height: 38px; padding: 0 16px; border-radius: 999px;
  background: transparent; color: var(--text);
  font-weight: 500; font-size: 14px;
  border: 1px solid var(--stroke-2);
  transition: border-color .2s ease, color .2s ease;
}
.cta-ghost:hover { border-color: var(--accent-line); color: var(--accent); }

/* ===== Hero ===== */
.hero { position: relative; overflow: hidden; padding: 72px 0 88px; }
.hero::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(900px 500px at 15% 5%, var(--hero-glow-1), transparent 60%),
    radial-gradient(700px 400px at 90% 15%, var(--hero-glow-2), transparent 60%);
  pointer-events: none;
}
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; position: relative; }
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: 999px;
  background: var(--accent-soft);
  border: 1px solid var(--accent-line);
  color: var(--accent); font-size: 12px; font-weight: 600; letter-spacing: .04em;
}
.hero-eyebrow .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }
.hero h1 {
  font-family: "Noto Sans SC", sans-serif;
  font-weight: 800;
  font-size: clamp(36px, 5vw, 64px);
  line-height: 1.1; letter-spacing: -.02em;
  margin: 20px 0 18px;
}
.hero h1 .accent { color: var(--accent); }
.hero p.lede { font-size: 17px; line-height: 1.7; color: var(--text-2); max-width: 520px; }
.hero p.lede b { color: var(--text); font-weight: 600; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 30px; }
.hero-ctas .cta { height: 50px; padding: 0 24px; font-size: 15px; }
.hero-ctas .cta-ghost { height: 50px; padding: 0 24px; font-size: 15px; }
.hero-trust {
  display: flex; gap: 24px; margin-top: 30px;
  padding-top: 24px; border-top: 1px dashed var(--stroke-2);
  max-width: 520px; flex-wrap: wrap;
}
.hero-trust .item { display: flex; flex-direction: column; gap: 2px; }
.hero-trust .num { font-family: "Inter", sans-serif; font-size: 20px; font-weight: 700; color: var(--text); }
.hero-trust .lbl { font-size: 12px; color: var(--text-3); }

/* Hero Visual */
.hero-visual {
  position: relative; aspect-ratio: 4/3;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, var(--card) 0%, var(--bg-2) 100%);
  border: 1px solid var(--stroke-2);
  overflow: hidden; box-shadow: var(--shadow-2);
}
.win-title {
  display: flex; align-items: center; justify-content: space-between;
  padding: 11px 16px; border-bottom: 1px solid var(--stroke);
  background: rgba(0,0,0,.12);
}
.win-dots { display: flex; gap: 6px; }
.win-dots span { width: 10px; height: 10px; border-radius: 50%; }
.win-dots .r { background: #E0605A; }
.win-dots .y { background: #D9A83E; }
.win-dots .g { background: #4FB864; }
.win-title .t { font-family: "Inter", sans-serif; font-size: 12px; color: var(--text-3); font-weight: 500; }
.win-stack { position: relative; height: calc(100% - 45px); padding: 22px; }
.win {
  position: absolute;
  background: color-mix(in srgb, var(--card) 92%, transparent);
  border: 1px solid var(--stroke-2);
  border-radius: 12px;
  backdrop-filter: blur(4px);
  box-shadow: 0 10px 24px -8px rgba(0,0,0,.35);
  overflow: hidden;
}
.win .bar {
  display: flex; align-items: center; gap: 6px;
  padding: 7px 10px; border-bottom: 1px solid var(--stroke);
  font-size: 11px; color: var(--text-2);
}
.win .bar .badge {
  margin-left: auto; font-size: 10px; padding: 2px 7px; border-radius: 5px;
  background: var(--accent-soft); color: var(--accent); font-weight: 600;
}
.win .content { padding: 12px; }
.win .ln { height: 7px; border-radius: 3px; background: var(--stroke-2); margin-bottom: 7px; }
.win .ln.short { width: 60%; }
.win .ln.acc { background: var(--accent-soft); }
.win-chat { top: 30px; left: 26px; width: 62%; height: 48%; }
.win-chat .bubble {
  padding: 7px 10px; border-radius: 8px;
  background: var(--stroke); font-size: 11px; color: var(--text);
  margin-bottom: 5px; max-width: 75%;
}
.win-chat .bubble.me { margin-left: auto; background: var(--accent); color: var(--bg); }
.win-video { top: 16%; left: 28%; width: 60%; height: 54%; border-color: var(--gold-line); }
.win-video .stage {
  padding: 0; position: relative; height: calc(100% - 30px);
  background: linear-gradient(135deg, var(--bg-2) 0%, var(--bg) 100%);
  display: grid; place-items: center;
}
.win-video .play {
  width: 42px; height: 42px; border-radius: 50%;
  background: var(--text); display: grid; place-items: center;
  opacity: .85;
}
.win-video .play svg { width: 16px; height: 16px; color: var(--bg); margin-left: 2px; }
.win-doc { bottom: 30px; left: 16%; width: 75%; height: 48%; }
.win-doc .ln { background: var(--gold-soft); }
.win-doc .ln.acc { background: var(--gold-line); }
.opacity-bar {
  position: absolute; bottom: 12px; left: 12px; right: 12px;
  height: 32px; border-radius: 9px;
  background: color-mix(in srgb, var(--bg) 70%, transparent);
  border: 1px solid var(--stroke);
  display: flex; align-items: center; padding: 0 14px; gap: 12px;
  backdrop-filter: blur(6px); font-size: 11px; color: var(--text-3);
}
.opacity-bar .track { flex: 1; height: 4px; border-radius: 2px; background: var(--stroke-2); position: relative; overflow: hidden; }
.opacity-bar .fill { position: absolute; left: 0; top: 0; bottom: 0; width: 60%; background: var(--accent); }
.opacity-bar .dot { position: absolute; left: 60%; top: -3px; width: 11px; height: 11px; border-radius: 50%; background: var(--text); transform: translateX(-50%); }
.opacity-bar .val { color: var(--accent); font-weight: 600; font-family: "Inter", sans-serif; min-width: 36px; text-align: right; }

.float-chip {
  position: absolute; display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 12px; border-radius: 11px;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  border: 1px solid var(--stroke-2);
  backdrop-filter: blur(6px);
  font-size: 12px; font-weight: 500; color: var(--text);
  box-shadow: 0 8px 20px -8px rgba(0,0,0,.3);
}
.float-chip .icon { width: 15px; height: 15px; display: grid; place-items: center; color: var(--accent); }
.chip-1 { top: 26px; right: -10px; animation: float 6s ease-in-out infinite; }
.chip-2 { bottom: 100px; left: -14px; animation: float 6s ease-in-out infinite 2s; }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-6px); } }

/* ===== Section base ===== */
section { padding: 80px 0; position: relative; }
.sec-eyebrow {
  display: inline-block; padding: 5px 12px; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent);
  font-size: 11px; font-weight: 600; letter-spacing: .08em;
  margin-bottom: 16px;
}
.sec-h {
  font-family: "Noto Sans SC", sans-serif;
  font-weight: 800; font-size: clamp(26px, 3.2vw, 40px);
  line-height: 1.2; letter-spacing: -.01em;
  margin-bottom: 12px; max-width: 720px;
}
.sec-sub { font-size: 16px; color: var(--text-2); max-width: 640px; line-height: 1.7; }

/* ===== How it works ===== */
.how { background: linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%); }
.how-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 48px; }
.step {
  position: relative; padding: 30px 28px;
  border-radius: var(--radius-lg);
  background: var(--card);
  border: 1px solid var(--stroke-2);
  box-shadow: var(--shadow-1);
  transition: border-color .3s ease;
}
.step:hover { border-color: var(--accent-line); }
.step-num {
  font-family: "Inter", sans-serif;
  font-size: 44px; font-weight: 800; line-height: 1;
  color: transparent; -webkit-text-stroke: 1px var(--accent-line);
  margin-bottom: 20px;
}
.step h3 { font-family: "Noto Sans SC", sans-serif; font-weight: 700; font-size: 19px; margin-bottom: 10px; }
.step p { color: var(--text-2); font-size: 14px; line-height: 1.7; }
.step p b { color: var(--accent); font-weight: 600; }
.step .ico {
  margin-top: 20px; width: 38px; height: 38px; border-radius: 10px;
  background: var(--accent-soft); border: 1px solid var(--accent-line);
  display: grid; place-items: center; color: var(--accent);
}
.step .ico svg { width: 19px; height: 19px; }

/* ===== Features bento ===== */
.features { background: var(--bg); }
.bento { display: grid; grid-template-columns: repeat(6, 1fr); grid-auto-rows: minmax(180px, auto); gap: 16px; margin-top: 42px; }
.b {
  background: var(--card); border: 1px solid var(--stroke-2);
  border-radius: var(--radius-lg); padding: 28px;
  position: relative; overflow: hidden;
  box-shadow: var(--shadow-1);
  transition: border-color .3s ease;
}
.b:hover { border-color: var(--accent-line); }
.b .ico {
  width: 40px; height: 40px; border-radius: 10px;
  background: var(--accent-soft); border: 1px solid var(--accent-line);
  display: grid; place-items: center; color: var(--accent); margin-bottom: 16px;
}
.b .ico svg { width: 19px; height: 19px; }
.b h3 { font-family: "Noto Sans SC", sans-serif; font-weight: 700; font-size: 18px; margin-bottom: 8px; }
.b p { color: var(--text-2); font-size: 14px; line-height: 1.7; }
.b.span2 { grid-column: span 2; }
.b.span3 { grid-column: span 3; }
.b.span4 { grid-column: span 4; }
.b.span6 { grid-column: span 6; }
.pill {
  position: absolute; top: 18px; right: 18px;
  padding: 3px 9px; border-radius: 999px;
  background: var(--gold-soft); border: 1px solid var(--gold-line);
  color: var(--gold); font-size: 10px; font-weight: 600;
}
.scale-bar { position: relative; height: 6px; border-radius: 3px; background: var(--stroke-2); overflow: hidden; margin-top: 16px; }
.scale-bar .f { position: absolute; left: 0; top: 0; bottom: 0; background: var(--accent); }
.scale-ticks { display: flex; justify-content: space-between; margin-top: 6px; font-family: "Inter", sans-serif; font-size: 11px; color: var(--text-3); }
.shader {
  position: absolute; right: -20px; bottom: -20px;
  width: 160px; height: 160px; border-radius: 50%;
  background: radial-gradient(circle at center, var(--accent-soft), transparent 70%);
  filter: blur(30px); opacity: .6; pointer-events: none;
}
.mouse-cursor { position: absolute; right: 24px; bottom: 24px; width: 26px; height: 26px; color: var(--accent); transform: rotate(-15deg); opacity: .7; }
.tag-pill {
  padding: 6px 12px; border-radius: 999px;
  background: var(--accent-soft); border: 1px solid var(--accent-line);
  color: var(--accent); font-size: 12px; font-weight: 500;
}

/* ===== Use cases ===== */
.cases {
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
  border-top: 1px solid var(--stroke); border-bottom: 1px solid var(--stroke);
}
.cases-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 42px; }
.case {
  position: relative; padding: 24px 22px;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--stroke-2);
  transition: border-color .25s ease;
}
.case:hover { border-color: var(--accent-line); }
.case .icon {
  width: 34px; height: 34px; border-radius: 9px;
  background: var(--gold-soft); border: 1px solid var(--gold-line);
  color: var(--gold); display: grid; place-items: center; margin-bottom: 14px;
}
.case .icon svg { width: 16px; height: 16px; }
.case h4 { font-family: "Noto Sans SC", sans-serif; font-weight: 700; font-size: 16px; margin-bottom: 6px; }
.case p { font-size: 13px; color: var(--text-2); line-height: 1.6; }
.case .tag { position: absolute; top: 16px; right: 16px; font-size: 10px; color: var(--text-3); font-family: "Inter", sans-serif; letter-spacing: .04em; }

/* ===== Stats ===== */
.stats { padding: 56px 0; }
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px;
  padding: 36px; border-radius: var(--radius-lg);
  background: var(--card); border: 1px solid var(--stroke-2);
}
.stat .num { font-family: "Inter", sans-serif; font-size: 36px; font-weight: 800; letter-spacing: -.02em; color: var(--accent); }
.stat .lbl { color: var(--text-2); font-size: 13px; margin-top: 4px; }

/* ===== Download ===== */
.download { padding: 80px 0 100px; position: relative; }
.download-card {
  position: relative; padding: 56px;
  border-radius: 28px;
  background: linear-gradient(135deg, var(--card) 0%, var(--bg-2) 100%);
  border: 1px solid var(--stroke-2);
  box-shadow: var(--shadow-2); overflow: hidden;
}
.download-card::before {
  content: ""; position: absolute; top: -160px; left: 50%; transform: translateX(-50%);
  width: 600px; height: 320px;
  background: radial-gradient(closest-side, var(--accent-soft), transparent 70%);
  pointer-events: none;
}
.download .sec-h { font-size: clamp(30px, 3.8vw, 48px); }
.download-ctas { display: flex; gap: 14px; margin-top: 28px; flex-wrap: wrap; }
.download-ctas .cta { height: 56px; padding: 0 30px; font-size: 16px; border-radius: 12px; }
.download-ctas .cta-ghost { height: 56px; padding: 0 28px; font-size: 15px; border-radius: 12px; }
.meta {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
  margin-top: 40px; padding-top: 28px; border-top: 1px dashed var(--stroke-2);
}
.meta .item { display: flex; flex-direction: column; gap: 3px; }
.meta .k { font-size: 11px; color: var(--text-3); letter-spacing: .06em; text-transform: uppercase; }
.meta .v { font-family: "Inter", sans-serif; font-weight: 600; color: var(--text); font-size: 13px; }

/* ===== FAQ ===== */
.faq details {
  padding: 22px 26px; border-radius: 14px;
  background: var(--card); border: 1px solid var(--stroke-2);
  cursor: pointer; transition: border-color .2s ease;
}
.faq details:hover { border-color: var(--stroke-2); }
.faq details+details { margin-top: 12px; }
.faq summary {
  font-family: 'Noto Sans SC', sans-serif; font-weight: 600; font-size: 17px;
  list-style: none; display: flex; justify-content: space-between; align-items: center;
}
.faq summary::after { content: "+"; color: var(--accent); font-size: 18px; font-weight: 400; }
.faq details[open] summary::after { content: "−"; }
.faq details p { margin-top: 14px; color: var(--text-2); font-size: 14px; line-height: 1.7; }

/* ===== Footer ===== */
footer { padding: 56px 0 40px; border-top: 1px solid var(--stroke); background: var(--bg-2); }
.foot { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 40px; margin-bottom: 40px; }
.foot .brand-col p { color: var(--text-2); font-size: 13px; line-height: 1.7; margin-top: 16px; max-width: 260px; }
.foot h5 { font-family: "Noto Sans SC", sans-serif; font-weight: 700; font-size: 13px; margin-bottom: 16px; color: var(--text); }
.foot ul { list-style: none; }
.foot li { margin-bottom: 8px; }
.foot li a { color: var(--text-2); font-size: 13px; transition: color .15s ease; }
.foot li a:hover { color: var(--accent); }
.foot-bottom {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 24px; border-top: 1px solid var(--stroke);
  font-size: 12px; color: var(--text-3);
}
.foot-bottom .links { display: flex; gap: 16px; }

/* ===== Promo popup（活动弹窗公告） ===== */
.promo-overlay {
  position: fixed; inset: 0; z-index: 100;
  display: grid; place-items: center;
  padding: 24px;
  background: rgba(6, 14, 12, .62);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.promo-card {
  position: relative;
  width: min(440px, 100%);
  padding: 34px 32px 30px;
  border-radius: 24px;
  background: linear-gradient(155deg, var(--card) 0%, var(--bg-2) 100%);
  border: 1px solid var(--gold-line);
  box-shadow: var(--shadow-2);
  overflow: hidden;
  text-align: center;
}
.promo-card::before {
  content: ""; position: absolute; top: -120px; left: 50%; transform: translateX(-50%);
  width: 380px; height: 240px;
  background: radial-gradient(closest-side, var(--gold-soft), transparent 70%);
  pointer-events: none;
}
.promo-close {
  position: absolute; top: 14px; right: 14px; z-index: 2;
  width: 32px; height: 32px; border-radius: 50%;
  display: grid; place-items: center;
  color: var(--text-3); border: 1px solid transparent;
  transition: color .2s ease, border-color .2s ease, background .2s ease;
}
.promo-close:hover { color: var(--text); border-color: var(--stroke-2); background: var(--stroke); }
.promo-close svg { width: 15px; height: 15px; }

.promo-badge {
  position: relative;
  display: inline-flex; align-items: center; gap: 7px;
  padding: 5px 13px; border-radius: 999px;
  background: var(--gold-soft); border: 1px solid var(--gold-line);
  color: var(--gold); font-size: 12px; font-weight: 600; letter-spacing: .03em;
}
.promo-badge .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--gold); animation: promo-pulse 1.6s ease-in-out infinite; }
@keyframes promo-pulse { 0%, 100% { opacity: 1; } 50% { opacity: .35; } }

.promo-title {
  position: relative;
  font-family: "Noto Sans SC", sans-serif;
  font-weight: 800; font-size: 24px; line-height: 1.3;
  letter-spacing: -.01em; margin: 16px 0 8px;
}
.promo-desc { position: relative; color: var(--text-2); font-size: 14px; line-height: 1.7; }
.promo-desc b { color: var(--gold); font-weight: 700; }

/* 优惠券券面 */
.promo-coupon {
  position: relative;
  display: flex; align-items: stretch;
  margin: 22px 0 24px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--gold-soft), transparent 60%), var(--card-2);
  border: 1px solid var(--gold-line);
  overflow: hidden;
  text-align: left;
}
.promo-coupon-left {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 3px; padding: 18px 22px;
  border-right: 1px dashed var(--gold-line);
}
.promo-amt {
  display: flex; align-items: baseline;
  font-family: "Inter", sans-serif; font-weight: 800; font-size: 40px; line-height: 1;
  color: var(--gold);
}
.promo-amt i { font-style: normal; font-size: 18px; font-weight: 700; margin-right: 2px; }
.promo-amt-lbl { font-size: 11px; color: var(--text-3); letter-spacing: .1em; }
.promo-coupon-right { flex: 1; display: flex; flex-direction: column; justify-content: center; gap: 6px; padding: 18px 20px; }
.promo-tag {
  align-self: flex-start;
  padding: 3px 10px; border-radius: 999px;
  background: var(--accent-soft); border: 1px solid var(--accent-line);
  color: var(--accent); font-size: 11px; font-weight: 600;
}
.promo-tip { font-size: 12px; color: var(--text-3); }
.promo-dashes { display: flex; gap: 5px; margin-top: 2px; }
.promo-dashes i { width: 14px; height: 3px; border-radius: 2px; background: var(--gold-line); }

.promo-actions { position: relative; display: flex; flex-direction: column; gap: 10px; }
.promo-cta { width: 100%; height: 48px; border-radius: 12px; font-size: 15px; justify-content: center; }
.promo-ghost { width: 100%; height: 44px; border-radius: 12px; font-size: 14px; justify-content: center; }

/* 弹窗动效 */
.promo-enter-active, .promo-leave-active { transition: opacity .28s ease; }
.promo-enter-active .promo-card, .promo-leave-active .promo-card {
  transition: transform .32s cubic-bezier(.2, .8, .3, 1), opacity .28s ease;
}
.promo-enter-from, .promo-leave-to { opacity: 0; }
.promo-enter-from .promo-card, .promo-leave-to .promo-card { transform: translateY(14px) scale(.96); opacity: 0; }

@media (prefers-reduced-motion: reduce) {
  .promo-badge .dot { animation: none; }
  .promo-enter-active, .promo-leave-active,
  .promo-enter-active .promo-card, .promo-leave-active .promo-card { transition-duration: .01ms; }
}

/* ===== Reveal animation ===== */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: translateY(0); }

/* ===== Mobile ===== */
@media (max-width: 1024px) {
  .hero { padding: 48px 0 56px; }
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .hero-visual { aspect-ratio: 4/3; }
  .how-grid { grid-template-columns: 1fr; gap: 14px; }
  .bento { grid-template-columns: repeat(2, 1fr); }
  .b.span2, .b.span3, .b.span4, .b.span6 { grid-column: span 2; }
  .cases-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .foot { grid-template-columns: 1fr 1fr; gap: 28px; }
  .nav-links { display: none; }
}
@media (max-width: 640px) {
  .container { padding: 0 18px; }
  section { padding: 56px 0; }
  .bento { grid-template-columns: 1fr; }
  .b.span2, .b.span3, .b.span4, .b.span6 { grid-column: span 1; }
  .cases-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .download-card { padding: 32px 22px; }
  .download .meta { grid-template-columns: 1fr 1fr; }
  .foot { grid-template-columns: 1fr; }
  .foot-bottom { flex-direction: column; gap: 12px; text-align: center; }
  .hero h1 { font-size: 32px; }
  .sec-h { font-size: 22px; }
  .promo-overlay { padding: 18px; }
  .promo-card { padding: 28px 20px 24px; border-radius: 20px; }
  .promo-title { font-size: 21px; }
  .promo-coupon-left { padding: 16px; }
  .promo-coupon-right { padding: 16px; }
  .promo-amt { font-size: 34px; }
}