@charset "utf-8";
/* ==========================================================================
   亿万号 · 官方下载站
   v1  设计：深空蓝 → 品牌渐变的 app 落地页
   ========================================================================== */

:root {
  --ink:        #0b1220;
  --ink-2:      #1f2c40;
  --ink-3:      #46586f;
  --mute:       #6b7c93;
  --line:       #e2e9f2;
  --line-2:     #eef3f9;
  --bg:         #ffffff;
  --bg-soft:    #f5f8fd;
  --brand:      #0a6dec;
  --brand-2:    #29a9f2;
  --brand-3:    #7fd3ff;
  --deep:       #06162e;

  --sans: "PingFang SC", "HarmonyOS Sans SC", "Hiragino Sans GB",
          "Microsoft YaHei", "Segoe UI", system-ui, -apple-system, sans-serif;

  --radius:  14px;
  --radius-l: 22px;
  --shadow-1: 0 1px 2px rgba(11,18,32,.06), 0 8px 24px -12px rgba(11,18,32,.18);
  --shadow-2: 0 24px 60px -28px rgba(11,18,32,.42);
  --w: 1160px;
  --gut: 22px;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; border: 0; }
a { color: var(--brand); text-decoration: none; }
a:hover { color: #0757bd; }

h1, h2, h3, h4 { margin: 0; line-height: 1.25; letter-spacing: -.015em; }
p { margin: 0; }

.wrap {
  width: 100%; max-width: var(--w);
  margin: 0 auto; padding: 0 var(--gut);
}

:focus-visible { outline: 2px solid var(--brand-2); outline-offset: 3px; border-radius: 4px; }

/* ---------- 顶部 ---------- */
.site-head {
  position: sticky; top: 0; z-index: 60;
  background: rgba(255,255,255,.88);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.site-head.is-pin {
  border-bottom-color: var(--line);
  box-shadow: 0 6px 24px -18px rgba(11,18,32,.5);
}
.site-head .wrap {
  display: flex; align-items: center; justify-content: space-between;
  gap: 18px; height: 64px;
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); }
.brand:hover { color: var(--ink); }
.brand img { width: 32px; height: 32px; border-radius: 8px; }
.brand b { font-size: 17px; letter-spacing: .01em; font-weight: 700; white-space: nowrap; }
.brand span {
  font-size: 11px; color: var(--mute); letter-spacing: .06em;
  padding-left: 10px; border-left: 1px solid var(--line);
  display: none; white-space: nowrap;
}
@media (min-width: 720px) { .brand span { display: inline-block; } }

.head-nav { display: flex; align-items: center; gap: 22px; flex: none; }
.head-nav a.lnk { font-size: 14px; color: var(--ink-3); display: none; }
.head-nav a.lnk:hover { color: var(--brand); }
@media (min-width: 900px) { .head-nav a.lnk { display: inline-block; } }

.head-dl {
  display: inline-flex; align-items: center; gap: 7px;
  height: 38px; padding: 0 16px; border-radius: 999px;
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-2) 100%);
  color: #fff; font-size: 14px; font-weight: 600; white-space: nowrap;
  box-shadow: 0 6px 18px -8px rgba(10,109,236,.75);
}
.head-dl:hover { color: #fff; filter: brightness(1.06); }
.head-dl svg { width: 15px; height: 15px; }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  color: #eaf3ff;
  background:
    radial-gradient(900px 520px at 78% 8%, rgba(41,169,242,.42), transparent 62%),
    radial-gradient(700px 480px at 12% 88%, rgba(10,109,236,.36), transparent 64%),
    linear-gradient(165deg, #051228 0%, #072a52 42%, #061c3a 100%);
  background-color: #051228;
  padding: 44px 0 56px;
}
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 78% 62% at 50% 26%, #000 30%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 78% 62% at 50% 26%, #000 30%, transparent 78%);
}
.hero .wrap { position: relative; z-index: 2; }

.hero-inner { display: grid; gap: 40px; }
.hero-inner > * { min-width: 0; }
@media (min-width: 900px) {
  .hero { padding: 62px 0 76px; }
  .hero-inner { grid-template-columns: 1.05fr .95fr; align-items: center; gap: 48px; }
}

.pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px 6px 10px; border-radius: 999px;
  background: rgba(127,211,255,.12);
  border: 1px solid rgba(127,211,255,.26);
  color: #bfe4ff; font-size: 12.5px; letter-spacing: .02em;
  margin-bottom: 20px;
}
.pill i {
  flex: none; width: 6px; height: 6px; border-radius: 50%; background: #4fd1a5;
  box-shadow: 0 0 0 3px rgba(79,209,165,.22);
}
.pill b { color: #fff; font-weight: 600; }

.hero h1 {
  font-size: clamp(29px, 7vw, 54px);
  font-weight: 800; letter-spacing: -.03em; line-height: 1.14;
  color: #fff; margin-bottom: 18px; text-wrap: balance;
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(100deg, #7fd3ff 0%, #4fa8ff 48%, #a8e6ff 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub {
  font-size: 15.5px; line-height: 1.85; color: #b9cde6;
  max-width: 34em; margin-bottom: 26px;
}
.hero-sub b { color: #eaf3ff; font-weight: 600; }

/* 下载按钮 */
.dl-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 18px; }
.dl-btn {
  display: flex; align-items: center; gap: 12px;
  flex: 1 1 196px; min-width: 0; padding: 11px 20px 11px 16px;
  border-radius: 14px; border: 1px solid rgba(255,255,255,.18);
  background: rgba(255,255,255,.07);
  color: #fff;
  transition: transform .16s ease, background .16s ease, border-color .16s ease;
}
.dl-btn:hover {
  color: #fff; transform: translateY(-2px);
  background: rgba(255,255,255,.13); border-color: rgba(255,255,255,.34);
}
.dl-btn.primary {
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-2) 100%);
  border-color: transparent;
  box-shadow: 0 16px 34px -16px rgba(41,169,242,.9);
}
.dl-btn.primary:hover { filter: brightness(1.06); }
.dl-btn .ico { flex: none; width: 26px; height: 26px; display: grid; place-items: center; }
.dl-btn .ico svg { width: 24px; height: 24px; }
.dl-btn .tx { line-height: 1.2; min-width: 0; }
.dl-btn .tx small {
  display: block; font-size: 10.5px; letter-spacing: .1em;
  text-transform: uppercase; opacity: .72; margin-bottom: 3px;
}
.dl-btn .tx strong { display: block; font-size: 15.5px; font-weight: 700; }

.hero-meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px 18px;
  font-size: 12.5px; color: #8fa8c6;
}
.hero-meta span { display: inline-flex; align-items: center; gap: 6px; }
.hero-meta b { color: #d6e6f8; font-weight: 600; }
.hero-meta .dot { width: 3px; height: 3px; border-radius: 50%; background: #46617f; }

/* 手机模型 */
.hero-art { position: relative; display: flex; justify-content: center; }
.phone {
  position: relative; width: min(278px, 72vw);
  aspect-ratio: 640 / 1387;
  border-radius: 34px; padding: 9px;
  background: linear-gradient(160deg, #34506f 0%, #101d2f 46%, #24384f 100%);
  box-shadow: 0 40px 80px -30px rgba(0,0,0,.85), 0 0 0 1px rgba(255,255,255,.1) inset;
  z-index: 2;
}
.phone::before {
  content: ""; position: absolute; top: 15px; left: 50%; transform: translateX(-50%);
  width: 34%; height: 18px; border-radius: 0 0 12px 12px;
  background: #0a1220; z-index: 3;
}
.phone img {
  width: 100%; height: 100%; object-fit: cover; object-position: top;
  border-radius: 26px; background: #0a1220;
}
.glow {
  position: absolute; z-index: 1; width: 82%; aspect-ratio: 1;
  border-radius: 50%; filter: blur(46px); opacity: .58;
  background: radial-gradient(circle, #2f9fff 0%, rgba(47,159,255,0) 68%);
}
.glow.a { top: -8%; right: -12%; }
.glow.b { bottom: -14%; left: -16%; background: radial-gradient(circle, #0a6dec 0%, rgba(10,109,236,0) 70%); opacity: .45; }

.float-card {
  position: absolute; z-index: 4;
  background: rgba(10,26,46,.82);
  border: 1px solid rgba(127,211,255,.22);
  border-radius: 13px; padding: 10px 14px;
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 16px 34px -20px rgba(0,0,0,.9);
  font-size: 12px; color: #a9c3e0; line-height: 1.5;
  display: none;
}
.float-card b { display: block; color: #fff; font-size: 16px; font-weight: 700; }
.float-card.tl { top: 14%; left: -6%; }
.float-card.br { bottom: 12%; right: -4%; }
@media (min-width: 900px) { .float-card { display: block; } }
@media (min-width: 1100px) {
  .float-card.tl { left: -14%; }
  .float-card.br { right: -12%; }
}

/* ---------- 二维码段 ---------- */
.qr-band { padding: 46px 0 8px; background: var(--bg); }
.qr-grid { display: grid; gap: 16px; }
@media (min-width: 760px) { .qr-grid { grid-template-columns: 1fr 1fr; gap: 22px; } }

.qr-card {
  display: flex; align-items: center; gap: 20px;
  padding: 22px; border-radius: var(--radius-l);
  border: 1px solid var(--line); background: #fff;
  box-shadow: var(--shadow-1);
}
.qr-card figure { margin: 0; flex: none; width: 116px; }
.qr-card figure img {
  width: 116px; height: 116px; border-radius: 10px;
  border: 1px solid var(--line);
}
.qr-card figure figcaption {
  font-size: 11px; color: var(--mute); text-align: center;
  letter-spacing: .06em; padding-top: 7px;
}
.qr-card .body { min-width: 0; }
.qr-card .body h3 { font-size: 18px; font-weight: 700; margin-bottom: 6px; }
.qr-card .body p { font-size: 13px; color: var(--mute); line-height: 1.7; margin-bottom: 12px; }
.qr-card .body a {
  font-size: 13.5px; font-weight: 600; display: inline-flex; align-items: center; gap: 5px;
}
.qr-card .body a svg { width: 14px; height: 14px; }

/* ---------- 通用段落 ---------- */
.sec { padding: 62px 0; }
.sec.soft { background: var(--bg-soft); }
.sec-head { max-width: 44em; margin-bottom: 34px; }
.sec-head .kicker {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 11.5px; font-weight: 700; letter-spacing: .16em; text-transform: uppercase;
  color: var(--brand); margin-bottom: 12px;
}
.sec-head .kicker::before {
  content: ""; width: 22px; height: 2px; border-radius: 2px;
  background: linear-gradient(90deg, var(--brand), var(--brand-3));
}
.sec-head h2 {
  font-size: clamp(23px, 4.4vw, 34px); font-weight: 800; letter-spacing: -.025em;
  margin-bottom: 12px; text-wrap: balance;
}
.sec-head p { color: var(--ink-3); font-size: 15px; line-height: 1.85; }

/* 功能卡 */
.feat-grid { display: grid; gap: 14px; }
@media (min-width: 620px) { .feat-grid { grid-template-columns: 1fr 1fr; gap: 18px; } }
@media (min-width: 980px) { .feat-grid { grid-template-columns: repeat(3, 1fr); } }

.feat {
  position: relative; overflow: hidden;
  padding: 24px; border-radius: var(--radius);
  background: #fff; border: 1px solid var(--line);
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.feat:hover { transform: translateY(-3px); box-shadow: var(--shadow-2); border-color: #cfe0f5; }
.feat::after {
  content: ""; position: absolute; right: -40px; top: -40px;
  width: 110px; height: 110px; border-radius: 50%;
  background: radial-gradient(circle, rgba(41,169,242,.14), transparent 70%);
  pointer-events: none;
}
.feat .fi {
  width: 40px; height: 40px; border-radius: 11px; display: grid; place-items: center;
  background: linear-gradient(135deg, rgba(10,109,236,.1), rgba(41,169,242,.16));
  color: var(--brand); margin-bottom: 15px;
}
.feat .fi svg { width: 20px; height: 20px; }
.feat h3 { font-size: 16.5px; font-weight: 700; margin-bottom: 7px; }
.feat p { font-size: 13.5px; color: var(--ink-3); line-height: 1.8; }

/* 截图 */
.shots { position: relative; }
.shot-track {
  display: flex; gap: 16px;
  overflow-x: auto; scroll-snap-type: x mandatory;
  padding: 4px 0 18px;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}
.shot-track::-webkit-scrollbar { height: 6px; }
.shot-track::-webkit-scrollbar-thumb { background: #cfdcec; border-radius: 3px; }
.shot-track figure {
  margin: 0; flex: none; width: 178px; scroll-snap-align: start;
}
.shot-track img {
  width: 178px; height: auto; border-radius: 16px; border: 1px solid var(--line);
  box-shadow: var(--shadow-1); background: #fff;
}
.shot-track figcaption {
  font-size: 12px; color: var(--mute); text-align: center; padding-top: 9px;
}
@media (min-width: 760px) {
  .shot-track figure, .shot-track img { width: 226px; }
}

/* 版本表 */
.table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--line); background: #fff; }
table.spec {
  width: 100%; border-collapse: collapse; font-size: 14px; min-width: 520px;
}
table.spec th, table.spec td {
  padding: 14px 18px; text-align: left; border-bottom: 1px solid var(--line-2);
  vertical-align: top;
}
table.spec thead th {
  background: var(--bg-soft); font-size: 12.5px; font-weight: 700;
  color: var(--ink-2); letter-spacing: .04em; white-space: nowrap;
  border-bottom: 1px solid var(--line);
}
table.spec tbody th {
  font-weight: 600; color: var(--ink-3); font-size: 13px; white-space: nowrap;
  width: 30%;
}
table.spec tbody tr:last-child th, table.spec tbody tr:last-child td { border-bottom: 0; }
table.spec td { color: var(--ink-2); }

/* 步骤 */
.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
@media (min-width: 760px) { .steps { grid-template-columns: 1fr 1fr; gap: 18px; } }
.steps li {
  display: flex; gap: 14px; padding: 20px;
  border-radius: var(--radius); background: #fff; border: 1px solid var(--line);
}
.steps .n {
  flex: none; width: 28px; height: 28px; border-radius: 50%;
  display: grid; place-items: center; font-size: 13px; font-weight: 700;
  color: #fff; background: linear-gradient(135deg, var(--brand), var(--brand-2));
}
.steps b { display: block; font-size: 15px; margin-bottom: 4px; }
.steps p { font-size: 13.5px; color: var(--ink-3); line-height: 1.75; }

/* 提示条 */
.note {
  display: flex; gap: 12px; align-items: flex-start;
  padding: 16px 18px; border-radius: var(--radius);
  background: #f0f7ff; border: 1px solid #d6e7fb;
  font-size: 13.5px; line-height: 1.8; color: #274d78;
}
.note svg { flex: none; width: 18px; height: 18px; margin-top: 2px; color: var(--brand); }
.note b { color: #14406e; }

/* FAQ */
.faq { border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq details[open] { background: #fbfdff; }
.faq summary {
  list-style: none; cursor: pointer; position: relative;
  padding: 19px 44px 19px 0; font-size: 15.5px; font-weight: 600; color: var(--ink);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ""; position: absolute; right: 8px; top: 25px;
  width: 11px; height: 11px;
  border-right: 2px solid var(--brand); border-bottom: 2px solid var(--brand);
  transform: rotate(45deg); transition: transform .2s ease; border-radius: 1px;
}
.faq details[open] summary::after { transform: rotate(-135deg); top: 29px; }
.faq .ans { padding: 0 44px 20px 0; font-size: 14px; line-height: 1.9; color: var(--ink-3); }
.faq .ans p + p { margin-top: 9px; }

/* CTA */
.cta {
  position: relative; overflow: hidden; color: #eaf3ff;
  background:
    radial-gradient(700px 380px at 82% 10%, rgba(41,169,242,.42), transparent 64%),
    linear-gradient(120deg, #061c3a 0%, #0a2f5c 52%, #083a70 100%);
  padding: 52px 0;
}
.cta .wrap { display: grid; gap: 26px; }
@media (min-width: 900px) {
  .cta .wrap { grid-template-columns: 1.2fr auto; align-items: center; gap: 40px; }
}
.cta h2 { font-size: clamp(22px, 4vw, 31px); font-weight: 800; margin-bottom: 10px; }
.cta p { font-size: 14.5px; color: #afc8e4; max-width: 38em; line-height: 1.85; }
.cta-btns { display: flex; flex-wrap: wrap; gap: 12px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 46px; padding: 0 24px; border-radius: 999px;
  font-size: 14.5px; font-weight: 600; white-space: nowrap;
  transition: all .16s ease;
}
.btn-w {
  background: #fff; color: #0b2a4d;
  box-shadow: 0 14px 30px -16px rgba(0,0,0,.8);
}
.btn-w:hover { color: #08305c; transform: translateY(-2px); }
.btn-o { border: 1px solid rgba(255,255,255,.42); color: #eaf3ff; }
.btn-o:hover { color: #fff; background: rgba(255,255,255,.12); border-color: rgba(255,255,255,.7); }

/* 页脚 */
.site-foot { background: #061426; color: #93a8c2; padding: 46px 0 26px; }
.foot-top { display: grid; gap: 30px; padding-bottom: 32px; }
@media (min-width: 760px) {
  .foot-top { grid-template-columns: 1.7fr 1fr 1fr; gap: 40px; }
}
.foot-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.foot-brand img { width: 30px; height: 30px; border-radius: 8px; }
.foot-brand b { color: #fff; font-size: 16px; }
.site-foot p.about { font-size: 13px; line-height: 1.9; max-width: 30em; margin-bottom: 16px; }
.site-foot .contact { font-size: 13px; line-height: 2; }
.site-foot .contact a { color: #cfe0f2; }
.site-foot .contact a:hover { color: #fff; }
.site-foot h4 {
  color: #fff; font-size: 12px; letter-spacing: .16em; text-transform: uppercase;
  margin-bottom: 14px; font-weight: 700;
}
.site-foot ul { list-style: none; margin: 0; padding: 0; }
.site-foot li { margin-bottom: 9px; }
.site-foot li a { font-size: 13.5px; color: #a8bdd4; }
.site-foot li a:hover { color: #fff; }
.foot-bot {
  border-top: 1px solid rgba(255,255,255,.1); padding-top: 20px;
  display: flex; flex-wrap: wrap; gap: 8px 20px; justify-content: space-between;
  font-size: 12px; color: #6f88a3;
}

/* 动画 */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .5s ease, transform .5s ease; }
.reveal.is-in { opacity: 1; transform: none; }

/* ---------- 窄屏 ---------- */
@media (max-width: 460px) {
  :root { --gut: 16px; }
  .site-head .wrap { gap: 10px; height: 58px; }
  .brand { gap: 8px; }
  .brand img { width: 28px; height: 28px; }
  .brand b { font-size: 16px; }
  .head-dl { height: 34px; padding: 0 13px; font-size: 13px; }
  .head-dl svg { width: 13px; height: 13px; }
  .hero { padding: 30px 0 44px; }
  .hero-inner { gap: 30px; }
  .hero h1 { font-size: 30px; }
  .hero-sub { font-size: 14.5px; }
  .dl-actions { flex-direction: column; }
  .dl-btn { flex: none; width: 100%; }
  .hero-meta { gap: 6px 14px; font-size: 12px; }
  .hero-meta .dot { display: none; }
  .phone { width: min(240px, 66vw); }
  .qr-band { padding: 34px 0 4px; }
  .qr-card { flex-direction: column; text-align: center; padding: 20px 16px; gap: 14px; }
  .qr-card .body a { justify-content: center; }
  .sec { padding: 46px 0; }
  .sec-head { margin-bottom: 26px; }
  .cta { padding: 42px 0; }
  .cta-btns .btn { flex: 1 1 auto; }
  .faq .ans { padding-right: 0; }
  .faq summary { padding-right: 36px; }

  /* 窄屏：版本表改为堆叠卡片，避免被横向截断 */
  .table-wrap { overflow: visible; border: 0; background: none; border-radius: 0; }
  table.spec { min-width: 0; font-size: 13.5px; display: block; }
  table.spec thead { display: none; }
  table.spec tbody { display: grid; gap: 12px; }
  table.spec tbody tr {
    display: grid; grid-template-columns: 1fr 1fr;
    border: 1px solid var(--line); border-radius: var(--radius);
    background: #fff; overflow: hidden;
  }
  table.spec tbody th {
    grid-column: 1 / -1; width: auto; white-space: normal;
    background: var(--bg-soft); padding: 9px 14px; font-size: 12px;
    letter-spacing: .04em; color: var(--ink-3); border-bottom: 1px solid var(--line);
  }
  table.spec tbody td {
    padding: 11px 14px; font-size: 13px; border-bottom: 0;
    position: relative; padding-top: 22px;
  }
  table.spec tbody td::before {
    position: absolute; top: 6px; left: 14px;
    font-size: 10.5px; letter-spacing: .08em; color: var(--mute);
    text-transform: uppercase;
  }
  table.spec tbody td:nth-of-type(1)::before { content: "Android"; }
  table.spec tbody td:nth-of-type(2)::before { content: "iOS"; }
  table.spec tbody td + td { border-left: 1px solid var(--line-2); }
  table.spec tbody tr th + td { border-top: 0; }
  table.spec tbody td[colspan]::before { content: none; }
  table.spec tbody td[colspan] { grid-column: 1 / -1; padding-top: 11px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1 !important; transform: none !important; transition: none !important; }
  .dl-btn:hover, .feat:hover, .btn-w:hover { transform: none; }
}