/* ── 基础 ───────────────────────────────────────────── */
:root {
  --brand: #e11d48;
  --accent: #f97316;
  --bg: #0b0b12;
  --bg-2: #10101a;
  --card: rgba(255, 255, 255, .045);
  --card-2: rgba(255, 255, 255, .075);
  --line: rgba(255, 255, 255, .1);
  --text: #f4f4f7;
  --muted: #a3a3b2;
  --radius: 18px;
  --max: 1140px;
}

* { box-sizing: border-box; }

/* 必须放在组件规则之前生效级别之上：否则 .btn{display:inline-flex} 会盖掉 [hidden] */
[hidden] { display: none !important; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: radial-gradient(1200px 700px at 12% -10%, rgba(225, 29, 72, .22), transparent 60%),
              radial-gradient(900px 600px at 92% 4%, rgba(249, 115, 22, .16), transparent 62%),
              var(--bg);
  color: var(--text);
  font: 16px/1.65 "Inter", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  min-height: 100vh;
}

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

/* ── 背景层：图片轮播 + 氛围遮罩 + 虚焦光斑 ───────────── */
.bgstage {
  position: fixed;
  inset: 0;
  z-index: -2;
  overflow: hidden;
  pointer-events: none;
}
.bgstage img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 20%;
  opacity: 0;
  transform: scale(1.08);
  filter: blur(var(--bg-blur, 6px)) saturate(1.08) contrast(1.02);
  transition: opacity 1.8s ease;
  will-change: opacity, transform;
}
.bgstage img.is-on {
  opacity: var(--bg-opacity, .3);
  animation: bgdrift 24s ease-in-out infinite alternate;
}
@keyframes bgdrift {
  from { transform: scale(1.08) translate3d(-0.8%, 0.6%, 0); }
  to   { transform: scale(1.13) translate3d(0.8%, -0.8%, 0); }
}

.bgveil {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(120% 80% at 78% 4%, rgba(225, 29, 72, .20), transparent 55%),
    /* 左暗右透：文案在左边，影像在右边露出来 */
    linear-gradient(90deg, rgba(11, 11, 18, .90) 0%, rgba(11, 11, 18, .70) 38%, rgba(11, 11, 18, .30) 68%, rgba(11, 11, 18, .46) 100%),
    /* 下半屏淡出，保证功能卡/FAQ 那些区块照样清楚 */
    linear-gradient(180deg, rgba(11, 11, 18, 0) 0%, rgba(11, 11, 18, .55) 52%, rgba(11, 11, 18, .96) 88%, var(--bg) 100%);
}

.bokeh { position: fixed; inset: 0; z-index: -1; pointer-events: none; overflow: hidden; }
.bokeh i {
  position: absolute;
  border-radius: 50%;
  filter: blur(38px);
  opacity: .5;
  animation: bokfloat 15s ease-in-out infinite alternate;
}
.bokeh i:nth-child(1) { width: 180px; height: 180px; left: 7%; top: 13%; background: rgba(255, 138, 168, .28); }
.bokeh i:nth-child(2) { width: 120px; height: 120px; left: 27%; top: 63%; background: rgba(255, 196, 150, .22); animation-delay: -4s; }
.bokeh i:nth-child(3) { width: 220px; height: 220px; right: 5%; top: 24%; background: rgba(190, 120, 255, .22); animation-delay: -8s; }
.bokeh i:nth-child(4) { width: 140px; height: 140px; right: 21%; bottom: 9%; background: rgba(255, 120, 120, .18); animation-delay: -2s; }
@keyframes bokfloat {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to   { transform: translate3d(14px, -18px, 0) scale(1.12); }
}

body.has-bg .nav { background: rgba(11, 11, 18, .84); }

.glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(90px);
  pointer-events: none;
  z-index: 0;
  opacity: .55;
}
.glow--a { width: 420px; height: 420px; left: -140px; top: 120px; background: rgba(225, 29, 72, .38); }
.glow--b { width: 520px; height: 520px; right: -200px; top: 460px; background: rgba(120, 40, 200, .28); }

/* ── 年龄门 ─────────────────────────────────────────── */
.gate {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(5, 5, 9, .92);
  backdrop-filter: blur(14px);
}
.gate[hidden] { display: none; }
.gate__card {
  width: min(440px, 100%);
  padding: 34px 28px;
  border-radius: 24px;
  border: 1px solid var(--line);
  background: linear-gradient(160deg, rgba(255, 255, 255, .08), rgba(255, 255, 255, .02));
  text-align: center;
  box-shadow: 0 30px 90px rgba(0, 0, 0, .6);
}
.gate__card h2 { margin: 0 0 12px; font-size: 24px; }
.gate__card p { margin: 0 0 24px; color: var(--muted); font-size: 14.5px; }
.gate__badge {
  display: inline-grid;
  place-items: center;
  width: 62px; height: 62px;
  margin-bottom: 18px;
  border-radius: 50%;
  font-weight: 800;
  letter-spacing: .5px;
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--accent));
  box-shadow: 0 12px 30px rgba(225, 29, 72, .45);
}
.gate__actions { display: grid; gap: 10px; }

/* ── 按钮 ───────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 12px 20px;
  border-radius: 999px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text);
  cursor: pointer;
  font-weight: 600;
  font-size: 15px;
  transition: transform .16s ease, box-shadow .16s ease, background .16s ease, opacity .16s;
  white-space: nowrap;
}
.btn:active { transform: scale(.985); }
.btn--primary {
  background: linear-gradient(135deg, var(--brand), var(--accent));
  color: #fff;
  box-shadow: 0 12px 34px rgba(225, 29, 72, .38);
}
.btn--primary:hover { transform: translateY(-1px); box-shadow: 0 18px 42px rgba(225, 29, 72, .5); }
.btn--ghost {
  border-color: var(--line);
  background: var(--card);
  backdrop-filter: blur(6px);
}
.btn--ghost:hover { background: var(--card-2); }
.btn--lg { padding: 16px 30px; font-size: 16.5px; }

/* ── 导航 ───────────────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(16px);
  background: rgba(11, 11, 18, .72);
  border-bottom: 1px solid rgba(255, 255, 255, .06);
}
.nav__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 13px 22px;
  display: flex;
  align-items: center;
  gap: 18px;
}
.brand { display: flex; align-items: center; gap: 11px; }
.brand__mark {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border-radius: 11px;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--accent));
  box-shadow: 0 8px 22px rgba(225, 29, 72, .4);
  background-size: cover;
  background-position: center;
  flex: none;
}
.brand__text { display: grid; line-height: 1.25; }
.brand__text strong { font-size: 15px; letter-spacing: .2px; }
.brand__text small { color: var(--muted); font-size: 11.5px; }
.nav__links { display: flex; gap: 22px; margin-inline-start: auto; font-size: 14px; color: var(--muted); }
.nav__links a:hover { color: var(--text); }
.langs { display: flex; gap: 4px; padding: 3px; border-radius: 999px; border: 1px solid var(--line); background: var(--card); }
.langs button {
  border: 0; background: transparent; color: var(--muted);
  padding: 5px 11px; border-radius: 999px; cursor: pointer; font-size: 12.5px;
  transition: background .15s, color .15s;
  white-space: nowrap;
}
.langs button.is-on { background: var(--card-2); color: var(--text); }

.offline {
  max-width: var(--max);
  margin: 16px auto -8px;
  padding: 12px 18px;
  border-radius: 14px;
  border: 1px solid rgba(250, 204, 21, .3);
  background: rgba(250, 204, 21, .1);
  color: #fde68a;
  font-size: 14px;
}

/* ── Hero ───────────────────────────────────────────── */
main { position: relative; z-index: 1; }
.hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: 62px 22px 34px;
  display: grid;
  grid-template-columns: 1.08fr .92fr;
  gap: 46px;
  align-items: center;
}
/* ── 首屏真人图 ─────────────────────────────────────── */
.hero { position: relative; isolation: isolate; }

/* 桌面：通栏真人背景，左侧压暗保文案、右侧让人露出来 */
.hero__photos {
  position: absolute;
  z-index: -1;
  top: -72px;
  bottom: 6px;
  left: 50%;
  right: 50%;
  margin-inline: -50vw;
  overflow: hidden;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, transparent 0, #000 5%, #000 64%, transparent 100%);
  mask-image: linear-gradient(180deg, transparent 0, #000 5%, #000 64%, transparent 100%);
}
.hero__photos img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 20%;
  opacity: 0;
  filter: saturate(1.05) contrast(1.02);
  transition: opacity 1.6s ease;
}
.hero__photos img.is-on { opacity: .95; animation: heroDrift 28s ease-in-out infinite alternate; }
@keyframes heroDrift {
  from { transform: scale(1.02) translate3d(-.6%, 0, 0); }
  to   { transform: scale(1.08) translate3d(.6%, -.6%, 0); }
}
.hero__photos::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(11, 11, 18, .97) 0%, rgba(11, 11, 18, .90) 32%, rgba(11, 11, 18, .55) 58%, rgba(11, 11, 18, .28) 80%, rgba(11, 11, 18, .50) 100%),
    linear-gradient(180deg, rgba(11, 11, 18, .5) 0%, rgba(11, 11, 18, .12) 42%, rgba(11, 11, 18, .88) 86%, var(--bg) 100%);
}

/* 手机：首屏顶部真人图片带 */
.hero__band {
  display: none;
  position: relative;
  margin: -30px -22px 6px;
  height: clamp(258px, 40vh, 430px);
  border-radius: 0 0 24px 24px;
  overflow: hidden;
  background: var(--bg-2);
  box-shadow: 0 24px 60px rgba(0, 0, 0, .45);
}
.hero__band-imgs { position: absolute; inset: 0; }
.hero__band-imgs img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 16%;
  opacity: 0;
  transition: opacity 1.1s ease;
}
.hero__band-imgs img.is-on { opacity: 1; animation: bandDrift 26s ease-in-out infinite alternate; }
@keyframes bandDrift {
  from { transform: scale(1.01); }
  to   { transform: scale(1.07); }
}
.hero__band::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11, 11, 18, .5) 0%, rgba(11, 11, 18, 0) 26%, rgba(11, 11, 18, .04) 54%, rgba(11, 11, 18, .88) 100%);
  pointer-events: none;
}
.hero__band-top { position: absolute; top: 12px; inset-inline-start: 12px; z-index: 2; display: flex; gap: 8px; align-items: center; }
.pill--free {
  background: linear-gradient(100deg, var(--brand), var(--accent));
  border-color: transparent;
  color: #fff;
  font-weight: 800;
  box-shadow: 0 6px 20px rgba(225, 29, 72, .4);
}
.pill--free::before { display: none; }
.pill--onband {
  background: rgba(11, 11, 18, .55);
  border-color: rgba(255, 255, 255, .22);
  color: #fff;
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}
.hero__band-bot {
  position: absolute;
  bottom: 14px;
  inset-inline: 14px;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.hero__band-name { font-weight: 700; font-size: 15.5px; text-shadow: 0 2px 10px rgba(0, 0, 0, .7); }
.hero__band-live {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  border-radius: 999px;
  background: rgba(225, 29, 72, .86);
  color: #fff;
  font-size: 11.5px;
  font-weight: 600;
}
.hero__band-live i { width: 6px; height: 6px; border-radius: 50%; background: #4ade80; box-shadow: 0 0 8px #4ade80; }

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 15px;
  border-radius: 999px;
  border: 1px solid rgba(225, 29, 72, .35);
  background: rgba(225, 29, 72, .1);
  color: #ffd0da;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .3px;
}
.pill::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: #4ade80; box-shadow: 0 0 10px #4ade80; }
.hero h1 {
  margin: 20px 0 16px;
  font-size: clamp(34px, 5.4vw, 58px);
  line-height: 1.1;
  letter-spacing: -1.2px;
  font-weight: 800;
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(100deg, var(--brand), var(--accent) 70%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero__desc { margin: 0 0 28px; color: var(--muted); font-size: 16.5px; max-width: 31em; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; }
/* 完全免费：标签 + 三个小格 */
.free-line { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin: 0 0 18px; }
.free-line__tag {
  display: inline-flex;
  align-items: center;
  padding: 5px 14px;
  border-radius: 999px;
  background: linear-gradient(100deg, var(--brand), var(--accent));
  color: #fff;
  font-weight: 800;
  font-size: 13.5px;
  letter-spacing: .5px;
  white-space: nowrap;
  box-shadow: 0 6px 22px rgba(225, 29, 72, .38);
  animation: freePulse 2.4s ease-in-out infinite;
}
@keyframes freePulse {
  0%, 100% { box-shadow: 0 6px 22px rgba(225, 29, 72, .32); }
  50%      { box-shadow: 0 8px 30px rgba(249, 115, 22, .55); }
}
.free-line__text { font-size: 15px; font-weight: 600; color: #ffd0da; }

.free-strip { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0 0; padding: 0; list-style: none; }
.free-strip li {
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding: 6px 11px;
  border-radius: 11px;
  background: var(--card);
  border: 1px solid var(--line);
}
.free-strip b {
  font-size: 14px;
  font-weight: 800;
  background: linear-gradient(100deg, var(--brand), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  white-space: nowrap;
}
.free-strip span { font-size: 11.5px; color: var(--muted); white-space: nowrap; }

.hero__hint { margin-top: 14px; color: #c4c4d0; font-size: 13.5px; min-height: 1.4em; }

.meta { display: flex; gap: 26px; margin-top: 26px; padding-top: 22px; border-top: 1px solid var(--line); }
.meta__item { display: grid; gap: 2px; }
.meta__item span { font-size: 11.5px; color: var(--muted); text-transform: uppercase; letter-spacing: .8px; }
.meta__item b { font-size: 15px; font-weight: 600; }

/* 手机预览 */
.hero__visual { position: relative; display: grid; place-items: center; }
.phone {
  width: min(300px, 78vw);
  aspect-ratio: 9 / 18.60;
  padding: 9px;
  border-radius: 42px;
  background: linear-gradient(160deg, rgba(255, 255, 255, .3), rgba(255, 255, 255, .04) 40%, rgba(255, 255, 255, .16));
  box-shadow: 0 40px 90px rgba(0, 0, 0, .62), 0 0 0 1px rgba(255, 255, 255, .1);
  transform: rotate(-2.2deg);
}
.phone__screen {
  height: 100%;
  border-radius: 34px;
  overflow: hidden;
  background: linear-gradient(180deg, #16161f, #0d0d14);
  border: 1px solid rgba(255, 255, 255, .07);
  padding: 16px 14px;
}
.chat { display: grid; gap: 10px; align-content: start; height: 100%; }
.chat__head { display: flex; align-items: center; gap: 9px; padding-bottom: 10px; border-bottom: 1px solid rgba(255, 255, 255, .07); }
.chat__who { display: flex; align-items: center; gap: 7px; font-size: 13.5px; font-weight: 600; }
.avatar {
  width: 30px; height: 30px; border-radius: 50%;
  background: linear-gradient(135deg, #ff8fa3, #b91c1c);
  flex: none;
}
.avatar--sm { width: 26px; height: 26px; }
.avatar--xs { width: 22px; height: 22px; }
.avatar--md { width: 46px; height: 46px; }
.dot { width: 7px; height: 7px; border-radius: 50%; background: #4ade80; box-shadow: 0 0 8px #4ade80; }
.dot--off { background: #4b4b58; box-shadow: none; }
.bubble {
  max-width: 84%;
  padding: 9px 13px;
  border-radius: 15px;
  font-size: 13px;
  line-height: 1.5;
  animation: rise .5s ease both;
}
.bubble--in { background: rgba(255, 255, 255, .09); border-bottom-left-radius: 5px; justify-self: start; }
.bubble--out { background: linear-gradient(135deg, var(--brand), #a3123a); color: #fff; border-bottom-right-radius: 5px; justify-self: end; }
.bubble:nth-child(3) { animation-delay: .12s; }
.bubble:nth-child(4) { animation-delay: .24s; }
.bubble:nth-child(5) { animation-delay: .36s; }
@keyframes rise { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.call-card {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border-radius: 15px;
  background: linear-gradient(135deg, rgba(225, 29, 72, .22), rgba(249, 115, 22, .16));
  border: 1px solid rgba(255, 255, 255, .12);
  font-size: 12.5px;
}
.call-card__pulse {
  width: 9px; height: 9px; border-radius: 50%;
  background: #f43f5e;
  animation: pulse 1.6s infinite;
  flex: none;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(244, 63, 94, .7); }
  70% { box-shadow: 0 0 0 12px rgba(244, 63, 94, 0); }
  100% { box-shadow: 0 0 0 0 rgba(244, 63, 94, 0); }
}
.call-card__txt { font-weight: 600; }
.call-card__time { margin-inline-start: auto; color: var(--muted); font-variant-numeric: tabular-nums; }

.qr-card {
  position: absolute;
  inset-inline-end: -6px;
  bottom: 6px;
  display: grid;
  gap: 7px;
  justify-items: center;
  padding: 12px;
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 20px 50px rgba(0, 0, 0, .5);
}
.qr-card[hidden] { display: none; }
.qr-card__img { width: 92px; height: 92px; }
.qr-card__img svg { width: 100%; height: 100%; display: block; }
.qr-card small { color: #444; font-size: 10.5px; font-weight: 600; }

/* ── 数字条 ─────────────────────────────────────────── */
.strip {
  max-width: 780px;
  margin: 14px auto 0;
  padding: 20px 26px;
  display: flex;
  align-items: center;
  justify-content: space-around;
  gap: 12px;
  border-radius: 20px;
  border: 1px solid var(--line);
  background: var(--card);
  backdrop-filter: blur(10px);
}
.strip[hidden] { display: none; }
.strip__item { display: grid; gap: 3px; text-align: center; }
.strip__item b { font-size: 23px; font-variant-numeric: tabular-nums; letter-spacing: -.5px; }
.strip__item span { color: var(--muted); font-size: 11.5px; }
.strip__sep { width: 1px; height: 34px; background: var(--line); }

/* ── 通用 section ───────────────────────────────────── */
.section { max-width: var(--max); margin: 0 auto; padding: 74px 22px 0; }
.section--tight { padding-top: 58px; }
.section__head { text-align: center; max-width: 620px; margin: 0 auto 38px; }
.section__head h2 { margin: 0 0 10px; font-size: clamp(24px, 3.4vw, 33px); letter-spacing: -.6px; }
.section__head p { margin: 0; color: var(--muted); font-size: 15px; }

/* 预览屏 */
.shots { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.shot { display: grid; gap: 12px; justify-items: center; }
.shot__screen {
  width: 100%;
  aspect-ratio: 9 / 15.5;
  max-width: 240px;
  border-radius: 26px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, #17171f, #0e0e15);
  padding: 16px 14px;
  overflow: hidden;
  position: relative;
  box-shadow: 0 26px 60px rgba(0, 0, 0, .45);
}
.shot__label { color: var(--muted); font-size: 12.5px; }
.mini-row { display: flex; align-items: center; gap: 9px; padding: 9px 0; border-bottom: 1px solid rgba(255, 255, 255, .05); }
.mini-row .dot { margin-inline-start: auto; }
.mini-bar { height: 7px; border-radius: 99px; background: rgba(255, 255, 255, .16); display: block; }
.w25 { width: 25%; } .w38 { width: 38%; } .w40 { width: 40%; } .w45 { width: 45%; }
.w52 { width: 52%; } .w60 { width: 60%; } .w70 { width: 70%; }

.shot__screen--b { display: grid; place-items: center; background: linear-gradient(160deg, #2a1027, #131320 70%); }
.video-veil { position: absolute; inset: 0; background: radial-gradient(120px 120px at 50% 42%, rgba(225, 29, 72, .3), transparent 70%); }
.video-pip {
  position: absolute; inset-inline-end: 12px; top: 12px;
  width: 54px; height: 74px; border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, .3);
  background: linear-gradient(160deg, #3b1b3f, #1a1a26);
}
.video-ctrl { position: absolute; bottom: 16px; display: flex; gap: 10px; }
.video-ctrl i { width: 30px; height: 30px; border-radius: 50%; background: rgba(255, 255, 255, .16); }
.video-ctrl i:last-child { background: linear-gradient(135deg, var(--brand), #9f1239); }

.shot__screen--c { display: grid; gap: 12px; align-content: start; }
.profile-head { display: grid; justify-items: center; gap: 7px; padding-top: 10px; }
.profile-tags { display: flex; gap: 6px; justify-content: center; }
.profile-tags i { width: 46px; height: 20px; border-radius: 99px; background: rgba(255, 255, 255, .1); }
.profile-line { height: 7px; border-radius: 99px; background: rgba(255, 255, 255, .1); }
.profile-line.short { width: 62%; }
.profile-btn {
  margin-top: 8px; height: 38px; border-radius: 99px; border: 0; width: 100%;
  background: linear-gradient(135deg, var(--brand), var(--accent));
  color: #fff; font-size: 12.5px; opacity: .85;
}

/* 功能卡 */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card {
  padding: 24px 22px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--card);
  transition: transform .2s ease, background .2s ease, border-color .2s;
}
.card:hover { transform: translateY(-3px); background: var(--card-2); border-color: rgba(255, 255, 255, .18); }
.card__ico {
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border-radius: 12px;
  margin-bottom: 14px;
  background: linear-gradient(135deg, rgba(225, 29, 72, .28), rgba(249, 115, 22, .18));
  border: 1px solid rgba(255, 255, 255, .1);
  font-size: 17px;
}
.card h3 { margin: 0 0 7px; font-size: 16.5px; }
.card p { margin: 0; color: var(--muted); font-size: 14px; }

/* 步骤 */
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; counter-reset: s; }
.steps li {
  position: relative;
  padding: 24px 22px;
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, .06), rgba(255, 255, 255, .015));
  border: 1px solid var(--line);
}
.steps__n {
  display: grid; place-items: center;
  width: 30px; height: 30px; border-radius: 9px;
  margin-bottom: 13px;
  font-weight: 800; font-size: 14px;
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--accent));
}
.steps h3 { margin: 0 0 6px; font-size: 16px; }
.steps p { margin: 0; color: var(--muted); font-size: 14px; }

/* 安装说明 */
.install {
  padding: 26px 28px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, .035);
}
.install h2 { margin: 0 0 14px; font-size: 18px; }
.install ul { margin: 0; padding-inline-start: 20px; color: var(--muted); font-size: 14.5px; display: grid; gap: 8px; }

/* FAQ */
.faq { max-width: 780px; margin: 0 auto; display: grid; gap: 10px; }
.faq details {
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--card);
  padding: 0 18px;
  transition: background .18s;
}
.faq details[open] { background: var(--card-2); }
.faq summary {
  cursor: pointer;
  padding: 16px 0;
  font-weight: 600;
  font-size: 15px;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 12px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  margin-inline-start: auto;
  color: var(--muted);
  font-weight: 400;
  font-size: 19px;
  line-height: 1;
}
.faq details[open] summary::after { content: "−"; }
.faq p { margin: 0 0 17px; color: var(--muted); font-size: 14.5px; }

/* 结尾 CTA */
.final { max-width: var(--max); margin: 0 auto; padding: 82px 22px 60px; display: grid; gap: 14px; justify-items: center; }
.final__note { color: var(--muted); font-size: 12.5px; text-align: center; margin: 0; }

/* 页脚 */
.footer { border-top: 1px solid rgba(255, 255, 255, .06); background: rgba(0, 0, 0, .28); }
.footer__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 26px 22px 40px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  align-items: center;
  color: var(--muted);
  font-size: 12.5px;
}
.footer__note { margin-inline-start: auto; }

/* ── 照片墙 ─────────────────────────────────────────── */
.gallery {
  display: grid;
  grid-template-columns: repeat(var(--cols, 4), minmax(0, 1fr));
  gap: 14px;
}
.gallery .tile {
  position: relative;
  display: block;
  padding: 0;
  border: 0;
  aspect-ratio: 3 / 4;
  border-radius: 14px;
  overflow: hidden;
  background: var(--bg-2);
  cursor: zoom-in;
  box-shadow: 0 10px 26px rgba(0, 0, 0, .35);
  transition: transform .35s ease, box-shadow .35s ease;
}
.gallery .tile img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}
.gallery .tile::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 58%, rgba(11, 11, 18, .5));
  pointer-events: none;
}
.gallery .tile:hover { transform: translateY(-3px) scale(1.02); box-shadow: 0 18px 36px rgba(225, 29, 72, .26); }
.gallery .tile:hover img { transform: scale(1.06); }
.gallery .tile:focus-visible { outline: 2px solid var(--brand); outline-offset: 3px; }
.gallery__note { margin: 16px 0 0; text-align: center; color: var(--muted); font-size: 12.5px; }

/* 灯箱 */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 90;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 5vmin;
  background: rgba(6, 6, 10, .93);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  animation: lbIn .22s ease;
}
@keyframes lbIn { from { opacity: 0; } to { opacity: 1; } }
.lightbox img {
  max-width: min(100%, 92vw);
  max-height: 88vh;
  border-radius: 16px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, .65);
}
.lightbox__close {
  position: absolute;
  inset-block-start: 18px;
  inset-inline-end: 18px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, .18);
  background: rgba(20, 20, 28, .82);
  color: #fff;
  font-size: 23px;
  line-height: 1;
  cursor: pointer;
  transition: background .2s ease;
}
.lightbox__close:hover { background: var(--brand); }

/* ── RTL ────────────────────────────────────────────── */
[dir="rtl"] .hero h1 { letter-spacing: 0; }
[dir="rtl"] .phone { transform: rotate(2.2deg); }
[dir="rtl"] .brand__text small { letter-spacing: 0; }
[dir="rtl"] body { font-family: "Vazirmatn", "Segoe UI", Tahoma, "PingFang SC", sans-serif; }

/* RTL：文案换到右边，遮罩也要镜像，否则字压在亮的那半边，看着就「歪」 */
[dir="rtl"] .bgveil {
  background:
    radial-gradient(120% 80% at 22% 4%, rgba(225, 29, 72, .20), transparent 55%),
    linear-gradient(270deg, rgba(11, 11, 18, .90) 0%, rgba(11, 11, 18, .70) 38%, rgba(11, 11, 18, .30) 68%, rgba(11, 11, 18, .46) 100%),
    linear-gradient(180deg, rgba(11, 11, 18, 0) 0%, rgba(11, 11, 18, .55) 52%, rgba(11, 11, 18, .96) 88%, var(--bg) 100%);
}
[dir="rtl"] .hero__photos::after {
  background:
    linear-gradient(270deg, rgba(11, 11, 18, .97) 0%, rgba(11, 11, 18, .90) 32%, rgba(11, 11, 18, .55) 58%, rgba(11, 11, 18, .28) 80%, rgba(11, 11, 18, .50) 100%),
    linear-gradient(180deg, rgba(11, 11, 18, .5) 0%, rgba(11, 11, 18, .12) 42%, rgba(11, 11, 18, .88) 86%, var(--bg) 100%);
}

/* ── 响应式 ─────────────────────────────────────────── */
@media (max-width: 940px) {
  .hero { grid-template-columns: 1fr; gap: 24px; padding-top: 22px; text-align: center; }
  .hero__photos { display: none; }
  .hero__band { display: block; order: -1; height: clamp(200px, 30vh, 340px); margin-top: -26px; }
  /* 首屏必须把下载按钮留在折线内：手机端把标题和间距收紧，英文/波斯语长句才不会把 CTA 挤下去 */
  .hero h1 { font-size: clamp(27px, 7.2vw, 34px); line-height: 1.14; letter-spacing: -.6px; margin: 14px 0 12px; }
  .free-line { margin-bottom: 12px; }
  .hero__desc { margin-bottom: 18px; }
  .free-strip { margin-top: 12px; }
  .meta { margin-top: 20px; padding-top: 16px; }
  .free-line, .free-strip { justify-content: center; }
  /* 允许换行：波斯语文案更长，硬撑一行会横向溢出（RTL 下整页会被顶偏 49px） */
  .free-strip { flex-wrap: wrap; gap: 6px; }
  .free-strip li { padding: 6px 9px; gap: 5px; flex: 0 1 auto; min-width: 0; }
  .free-strip b { font-size: 13px; }
  .free-strip span { font-size: 11px; }
  .hero__desc { margin-inline: auto; }
  .cta-row { justify-content: center; }
  .meta { justify-content: center; }
  /* 文案先出现，下载按钮必须在首屏；手机模型退到后面当装饰 */
  .phone { width: min(228px, 60vw); padding: 7px; border-radius: 34px; }
  .phone__screen { border-radius: 28px; padding: 13px 11px; }
  .bubble { font-size: 11.5px; padding: 7px 10px; }
  .chat__who { font-size: 12px; }
  .call-card { font-size: 11px; padding: 9px 11px; }
  .nav__links { display: none; }
  .features, .shots { grid-template-columns: repeat(2, 1fr); }
  .gallery { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }

  .steps { grid-template-columns: 1fr; }
  .qr-card { inset-inline-end: 0; bottom: 0; padding: 9px; }
  .qr-card__img { width: 74px; height: 74px; }
  /* 手机上文案是通栏居中的，横向渐变护不住，改成整体压暗但保留一点影像 */
  body.has-bg .bgveil {
    background:
      radial-gradient(120% 60% at 60% 0%, rgba(225, 29, 72, .16), transparent 60%),
      linear-gradient(180deg, rgba(11, 11, 18, .70) 0%, rgba(11, 11, 18, .74) 55%, rgba(11, 11, 18, .94) 100%);
  }
  .bokeh i { opacity: .32; }
}
@media (max-width: 600px) {
  .section { padding-top: 56px; }
  .features, .shots { grid-template-columns: 1fr; }
  .gallery { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
  .shot__screen { max-width: 210px; }
  .strip { flex-direction: row; padding: 16px 12px; gap: 6px; }
  .strip__item b { font-size: 19px; }
  .strip__item span { font-size: 10.5px; }
  .meta { gap: 18px; }
  .footer__note { margin-inline-start: 0; }
  .nav__inner { padding: 11px 14px; gap: 8px; }
  .brand__text small { display: none; }
  .langs { padding: 2px; }
  .langs button { padding: 4px 8px; font-size: 11.5px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .001ms !important; transition-duration: .001ms !important; }
  html { scroll-behavior: auto; }
}

/* langs-fit：四个语言按钮在窄屏不撑破导航 */
@media (max-width: 430px) {
  .nav__inner { gap: 8px; }
  .langs { gap: 2px; padding: 2px; }
  .langs button { padding: 4px 7px; font-size: 11.5px; }
}