/* ===== 交易者习惯调研 落地页 — 金色主题 ===== */
:root {
  --gold: #f7931a;
  --gold-2: #ffd166;
  --gold-3: #b45309;
  --ink: #0b0703;
  --ink-2: #171009;
  --card: #1e1509;
  --card-2: #271b0e;
  --line: rgba(247, 147, 26, .22);
  --txt: #f5e9d6;
  --muted: #b8a68c;
  --up: #3ddc84;
  --danger: #ff5c5c;
  --radius: 18px;
  --font: 'Be Vietnam Pro', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
  --display: 'Anton', 'Montserrat', var(--font);
}

html[data-theme="neon"] {
  --gold: #22d3ee;
  --gold-2: #a5f3fc;
  --gold-3: #0e7490;
  --ink: #04061a;
  --ink-2: #0a0f2a;
  --card: #0d1230;
  --card-2: #141a3a;
  --line: rgba(34, 211, 238, .25);
  --txt: #eaf6ff;
  --muted: #8fa3c8;
}

* { box-sizing: border-box; margin: 0; padding: 0; -webkit-tap-highlight-color: transparent; }

html, body {
  background: var(--ink);
  color: var(--txt);
  font-family: var(--font);
  min-height: 100%;
  -webkit-font-smoothing: antialiased;
}

.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }

.stage {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background:
    radial-gradient(1200px 600px at 50% -10%, rgba(247, 147, 26, .18), transparent 60%),
    radial-gradient(900px 500px at 50% 110%, rgba(247, 147, 26, .10), transparent 60%),
    var(--ink);
}

.phone {
  position: relative;
  width: 100%;
  max-width: 430px;
  background: linear-gradient(180deg, var(--card), var(--ink-2));
  border: 1px solid var(--line);
  border-radius: 26px;
  overflow: hidden;
  box-shadow: 0 30px 80px rgba(0, 0, 0, .55), 0 0 0 1px rgba(255, 255, 255, .03) inset;
}

/* 背景装饰 */
.bg { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.bg__grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(247, 147, 26, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(247, 147, 26, .07) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(300px 300px at 50% 20%, #000, transparent 70%);
}
.bg__glow {
  position: absolute; top: -80px; left: 50%; transform: translateX(-50%);
  width: 360px; height: 360px; border-radius: 50%;
  background: radial-gradient(circle, rgba(247, 147, 26, .35), transparent 65%);
  filter: blur(30px);
}
.bg__vig { position: absolute; inset: 0; background: radial-gradient(120% 90% at 50% 40%, transparent 60%, rgba(0,0,0,.5)); }

.content { position: relative; padding: 26px 22px 22px; }

/* badge */
.badge {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 6px 13px; border-radius: 999px;
  background: rgba(247, 147, 26, .12);
  border: 1px solid var(--line);
  color: var(--gold-2); font-size: 12px; font-weight: 700; letter-spacing: .4px;
}
.badge__ic { width: 15px; height: 15px; fill: none; stroke: currentColor; stroke-width: 1.6; }
.badge__ic use { fill: currentColor; stroke: none; }

/* title */
.title {
  font-family: var(--display);
  font-weight: 800; font-style: italic;
  line-height: .95; margin: 16px 0 10px;
  letter-spacing: 1px;
}
.title__w { display: block; font-size: 58px; }
.title__w.w1 { color: var(--txt); }
.title__w.w2 { color: var(--gold); }
.title__w.w3 { color: var(--gold-2); }
.title__w.w4 { color: var(--gold); }

.subtitle { color: var(--muted); font-size: 15px; line-height: 1.5; margin-bottom: 16px; }
.subtitle i { color: var(--gold); font-style: normal; }

/* ribbon */
.ribbon {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  padding: 10px 12px; margin-bottom: 18px;
  border-radius: 12px;
  background: linear-gradient(90deg, rgba(247,147,26,.16), rgba(247,147,26,.05));
  border: 1px solid var(--line);
}
.ribbon__orn { width: 30px; height: 30px; }
.ribbon__orn .laurel { fill: none; stroke: var(--gold); stroke-width: 1.6; stroke-linecap: round; }
.ribbon__orn .chev { fill: none; stroke: var(--gold-2); stroke-width: 1.4; stroke-linecap: round; stroke-linejoin: round; }
.ribbon__txt { font-weight: 700; color: var(--gold-2); font-size: 13px; letter-spacing: .3px; }

/* hero */
.hero { text-align: center; }
.hero__kicker { color: var(--muted); font-size: 13px; letter-spacing: 2px; text-transform: uppercase; }
.hero__prize {
  font-family: var(--display); font-weight: 900; font-style: italic;
  display: flex; align-items: baseline; justify-content: center; gap: 8px;
  margin: 4px 0 8px;
}
.hero__one { font-size: 96px; line-height: 1; color: var(--gold); text-shadow: 0 6px 30px rgba(247,147,26,.4); }
.hero__btc { font-size: 56px; line-height: 1; color: var(--txt); }
.hero__reward {
  display: inline-flex; align-items: center; gap: 10px;
  color: var(--gold-2); font-size: 12px; font-weight: 700; letter-spacing: 2px;
}
.hero__reward .star { color: var(--gold); }

/* tick */
.tick { border-radius: 14px; }
.tick--main {
  display: flex; align-items: center; justify-content: space-between;
  gap: 10px; margin: 16px auto 10px; padding: 12px 14px;
  background: var(--card-2); border: 1px solid var(--line);
  max-width: 320px;
}
.tick__head { display: flex; align-items: center; gap: 9px; }
.tick__ico { width: 30px; height: 30px; display: grid; place-items: center; border-radius: 8px; }
.tick__ico svg { width: 22px; height: 22px; }
.tick__ico--btc { background: rgba(247,147,26,.18); color: #f7931a; }
.tick__ico--eth { background: rgba(98,126,234,.18); color: #627eea; }
.tick__ico--bnb { background: rgba(243,186,47,.18); color: #f3ba2f; }
.tick__ico--sol { background: rgba(153,69,255,.18); color: #9945ff; }
.tick__pair { font-size: 14px; font-weight: 700; }
.tick__pair b { color: var(--txt); }
.tick__price { font-size: 18px; font-weight: 800; font-family: var(--display); letter-spacing: .5px; }
.tick__mini { font-size: 14px; font-weight: 700; }
.tick__chg { font-size: 12px; font-weight: 700; color: var(--up); }
.tick--list { list-style: none; max-width: 320px; margin: 0 auto; }
.tick--list li {
  display: flex; align-items: center; gap: 9px;
  padding: 9px 14px; border-radius: 12px;
}
.tick--list li + li { border-top: 1px solid rgba(255,255,255,.04); }

/* coin */
.coin { position: relative; width: 200px; height: 200px; margin: 20px auto 6px; }
.coin__halo {
  position: absolute; inset: 0; border-radius: 50%;
  background: radial-gradient(circle, rgba(247,147,26,.5), transparent 68%);
  filter: blur(16px); animation: pulse 3s ease-in-out infinite;
}
.coin__img {
  position: relative; width: 100%; height: 100%; object-fit: contain;
  filter: drop-shadow(0 16px 30px rgba(247,147,26,.35));
  animation: float 4s ease-in-out infinite;
}
.coin__floor {
  position: absolute; left: 50%; bottom: -6px; transform: translateX(-50%);
  width: 150px; height: 22px; border-radius: 50%;
  background: radial-gradient(ellipse, rgba(247,147,26,.35), transparent 70%);
}
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-9px); } }
@keyframes pulse { 0%,100% { opacity: .7; } 50% { opacity: 1; } }

/* feats */
.feats { list-style: none; display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 18px 0; }
.feat {
  text-align: center; padding: 14px 8px; border-radius: 14px;
  background: var(--card-2); border: 1px solid rgba(255,255,255,.05);
}
.feat__ic { width: 24px; height: 24px; color: var(--gold); fill: none; stroke: currentColor; stroke-width: 1.5; }
.feat__ic use { fill: currentColor; stroke: none; }
.feat h3 { font-size: 14px; font-weight: 800; margin: 8px 0 4px; line-height: 1.25; }
.feat p { font-size: 11px; color: var(--muted); line-height: 1.5; }
.feat p i { color: var(--gold); font-style: normal; }

/* CTA */
.cta {
  position: relative; display: flex; align-items: center; justify-content: center; gap: 10px;
  width: 100%; padding: 15px; border: none; cursor: pointer;
  border-radius: 16px; overflow: hidden;
  background: linear-gradient(135deg, var(--gold), var(--gold-3));
  color: #1a0f02; font-family: var(--font); font-weight: 800; font-size: 16px;
  box-shadow: 0 12px 30px rgba(247,147,26,.35);
}
.cta--sm { padding: 12px; font-size: 15px; border-radius: 14px; }
.cta__shine {
  position: absolute; top: 0; left: -80%; width: 50%; height: 100%;
  background: linear-gradient(100deg, transparent, rgba(255,255,255,.5), transparent);
  animation: shine 2.8s ease-in-out infinite;
}
@keyframes shine { 0% { left: -80%; } 60%,100% { left: 130%; } }
.cta__rocket, .cta__arrow { width: 20px; height: 20px; }
.cta__rocket { fill: currentColor; }
.cta__rocket use { fill: currentColor; }
.cta__arrow { fill: none; stroke: currentColor; stroke-width: 1.8; }
.cta__arrow use { fill: currentColor; stroke: none; }
.cta__txt { position: relative; }

/* strip */
.strip { list-style: none; margin-top: 16px; display: flex; flex-direction: column; gap: 8px; }
.strip li {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; border-radius: 12px;
  background: rgba(255,255,255,.03);
}
.strip__ic { width: 22px; height: 22px; color: var(--gold); fill: none; stroke: currentColor; stroke-width: 1.5; }
.strip__ic use { fill: currentColor; stroke: none; }
.strip b { display: block; font-size: 13px; }
.strip span { font-size: 11px; color: var(--muted); }
.strip__time { font-family: var(--display); font-size: 13px; letter-spacing: 1px; }

.legal { margin-top: 14px; text-align: center; font-size: 11px; color: var(--muted); opacity: .8; }

/* ===== 问卷 sheet ===== */
.sheet { position: fixed; inset: 0; z-index: 100; }
.sheet[hidden] { display: none; }
.sheet__scrim { position: absolute; inset: 0; background: rgba(0,0,0,.7); backdrop-filter: blur(4px); }
.sheet__panel {
  position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
  width: calc(100% - 32px); max-width: 430px; max-height: 88vh;
  display: flex; flex-direction: column;
  background: var(--card); border: 1px solid var(--line); border-radius: 22px;
  overflow: hidden;
}
.sheet__grab { width: 44px; height: 5px; border-radius: 3px; background: rgba(255,255,255,.2); margin: 10px auto 0; }
.sheet__head { display: flex; align-items: center; gap: 10px; padding: 14px 16px 8px; }
.sheet__btn {
  width: 38px; height: 38px; display: grid; place-items: center;
  background: var(--card-2); border: 1px solid rgba(255,255,255,.08); border-radius: 11px;
  color: var(--txt); cursor: pointer;
}
.sheet__btn:disabled { opacity: .35; }
.sheet__btn svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.8; }
.sheet__btn svg use { fill: currentColor; stroke: none; }
.sheet__title { flex: 1; text-align: center; }
.sheet__title b { display: block; font-size: 15px; }
.sheet__title span { font-size: 11px; color: var(--muted); }

.bars { display: flex; gap: 5px; padding: 8px 16px; }
.bars i { flex: 1; height: 4px; border-radius: 2px; background: rgba(255,255,255,.1); transition: background .3s; }
.bars i.on { background: var(--gold); }

.sheet__body { flex: 1; overflow-y: auto; padding: 6px 16px 16px; }
.sheet__note { padding: 10px 16px; text-align: center; font-size: 11px; color: var(--muted); border-top: 1px solid rgba(255,255,255,.05); }

/* question */
.q { animation: enter .3s ease; }
.q__idx { font-family: var(--display); font-size: 42px; color: var(--gold); opacity: .5; line-height: 1; }
.q__title { font-size: 22px; font-weight: 800; margin: 8px 0 18px; line-height: 1.3; }
.q__opts { display: flex; flex-direction: column; gap: 10px; }
@keyframes enter { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.opt {
  display: flex; align-items: center; gap: 12px;
  width: 100%; padding: 14px 16px; text-align: left;
  background: var(--card-2); border: 1px solid rgba(255,255,255,.08); border-radius: 14px;
  color: var(--txt); font-size: 15px; font-weight: 600; cursor: pointer;
  transition: border-color .2s, background .2s;
}
.opt.sel { border-color: var(--gold); background: rgba(247,147,26,.1); }
.opt__box {
  width: 22px; height: 22px; display: grid; place-items: center; flex: none;
  border-radius: 50%; border: 2px solid rgba(255,255,255,.2);
}
.opt.sel .opt__box { border-color: var(--gold); background: var(--gold); color: #1a0f02; }
.opt__box svg { width: 13px; height: 13px; opacity: 0; fill: none; stroke: currentColor; stroke-width: 2; }
.opt.sel .opt__box svg { opacity: 1; }
.opt__box svg use { fill: currentColor; stroke: none; }

/* email field */
.field { margin-bottom: 12px; }
.field__input {
  width: 100%; padding: 14px 16px; border-radius: 14px;
  background: var(--card-2); border: 1px solid rgba(255,255,255,.1);
  color: var(--txt); font-size: 15px; font-family: var(--font); outline: none;
}
.field__input:focus { border-color: var(--gold); }
.field__input.bad { border-color: var(--danger); }
.field__err { color: var(--danger); font-size: 12px; margin-top: 6px; }

/* done */
.done { text-align: center; animation: enter .3s ease; }
.done__mark {
  width: 72px; height: 72px; margin: 10px auto 14px; display: grid; place-items: center;
  border-radius: 50%; background: rgba(61,220,132,.15); color: var(--up);
}
.done__mark svg { width: 36px; height: 36px; fill: none; stroke: currentColor; stroke-width: 2; }
.done__mark svg use { fill: currentColor; stroke: none; }
.done h2 { font-size: 24px; font-weight: 800; }
.done__sub { color: var(--muted); margin: 8px 0 14px; font-size: 14px; }
.done__sub b { color: var(--gold); }
.done__code { padding: 14px; border-radius: 14px; background: var(--card-2); border: 1px dashed var(--line); margin-bottom: 14px; }
.done__code span { display: block; font-size: 12px; color: var(--muted); }
.done__code b { font-family: var(--display); font-size: 28px; letter-spacing: 3px; color: var(--gold); }
.done__list { list-style: none; text-align: left; margin: 0 0 14px; }
.done__list li { display: flex; justify-content: space-between; padding: 8px 0; border-bottom: 1px solid rgba(255,255,255,.05); font-size: 13px; }
.done__list b { color: var(--gold-2); }
.done__hint { margin-top: 12px; font-size: 12px; color: var(--muted); }