:root {
  --ink: #211a3d;
  --deep: #2a2050;
  --muted: #6f6885;
  --bg: #fdf9ff;
  --bg-soft: #f6f0ff;
  --white: #ffffff;
  --coral: #ff5e7e;
  --orange: #ff8a3d;
  --sun: #ffcf33;
  --mint: #12d8a0;
  --sky: #3aa0ff;
  --violet: #7c4dff;
  --pink: #ff4fa3;
  --line: #efe6fb;
  --grad: linear-gradient(120deg, #7c4dff 0%, #ff4fa3 52%, #ff8a3d 100%);
  --grad-cool: linear-gradient(120deg, #3aa0ff 0%, #7c4dff 60%, #ff4fa3 100%);
  --shadow: 0 18px 44px rgba(124, 77, 255, 0.16);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

/* ---------- 顶部导航 ---------- */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

nav {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0.7rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
}

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  object-fit: cover;
  box-shadow: 0 6px 16px rgba(124, 77, 255, 0.28);
}

.brand .name {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.06em;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.brand .name small {
  display: block;
  font-size: 0.6rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: var(--muted);
  -webkit-text-fill-color: var(--muted);
}

nav ul {
  display: flex;
  gap: 1.6rem;
  list-style: none;
  align-items: center;
}

nav ul a {
  text-decoration: none;
  font-size: 0.9rem;
  color: var(--muted);
  letter-spacing: 0.04em;
  transition: color 0.2s;
  position: relative;
}

nav ul a:hover, nav ul a.active { color: var(--violet); }

nav ul a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -7px;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--grad);
  transition: width 0.25s;
}

nav ul a:hover::after, nav ul a.active::after { width: 100%; }

/* ---------- 首屏 ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: 5rem 1.5rem 6rem;
  background:
    radial-gradient(ellipse at 12% 12%, rgba(124, 77, 255, 0.28), transparent 55%),
    radial-gradient(ellipse at 88% 18%, rgba(255, 79, 163, 0.26), transparent 55%),
    radial-gradient(ellipse at 70% 92%, rgba(255, 138, 61, 0.22), transparent 55%),
    linear-gradient(160deg, #fbf6ff 0%, #fdf1fb 50%, #fff5ef 100%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(124, 77, 255, 0.08) 1.2px, transparent 1.2px);
  background-size: 30px 30px;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  max-width: 1120px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3rem;
  align-items: center;
}

.hero .pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.35rem 1rem;
  border-radius: 999px;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--violet);
  background: rgba(124, 77, 255, 0.1);
  border: 1px solid rgba(124, 77, 255, 0.2);
  margin-bottom: 1.3rem;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  line-height: 1.25;
  letter-spacing: 0.02em;
  color: var(--deep);
  margin-bottom: 1rem;
}

.hero h1 .accent {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero p.sub {
  max-width: 34em;
  color: var(--muted);
  font-size: 1.02rem;
  margin-bottom: 1.8rem;
}

.hero .actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 2rem;
  border-radius: 999px;
  text-decoration: none;
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  transition: transform 0.25s, box-shadow 0.25s, background 0.25s;
}

.btn-grad {
  background: var(--grad);
  color: #fff;
  font-weight: 600;
  box-shadow: 0 12px 30px rgba(255, 79, 163, 0.32);
}

.btn-grad:hover { transform: translateY(-2px); box-shadow: 0 16px 38px rgba(255, 79, 163, 0.42); }

.btn-line {
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--deep);
}

.btn-line:hover { transform: translateY(-2px); box-shadow: var(--shadow); }

/* ---------- 手机预览 ---------- */
.hero-visual { display: flex; justify-content: center; }

.phone {
  width: 250px;
  aspect-ratio: 9 / 18.5;
  border-radius: 38px;
  background: #1b1436;
  padding: 10px;
  box-shadow: 0 30px 60px rgba(42, 32, 80, 0.32);
  position: relative;
}

.phone::after {
  content: "";
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: 90px;
  height: 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.22);
}

.screen {
  width: 100%;
  height: 100%;
  border-radius: 30px;
  background: linear-gradient(165deg, #7c4dff 0%, #ff4fa3 60%, #ff8a3d 100%);
  padding: 2.6rem 1rem 1rem;
  overflow: hidden;
}

.screen .s-head { color: #fff; font-weight: 700; font-size: 1.05rem; margin-bottom: 0.2rem; }
.screen .s-sub { color: rgba(255, 255, 255, 0.8); font-size: 0.72rem; margin-bottom: 1rem; }

.tile {
  background: rgba(255, 255, 255, 0.95);
  border-radius: 14px;
  padding: 0.7rem 0.8rem;
  margin-bottom: 0.65rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  box-shadow: 0 8px 18px rgba(42, 32, 80, 0.14);
}

.tile .dot {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  color: #fff;
  font-weight: 700;
}

.tile .bars { flex: 1; }
.tile .bars i { display: block; height: 7px; border-radius: 999px; background: #e6def5; }
.tile .bars i + i { margin-top: 6px; width: 62%; }

.d1 { background: linear-gradient(135deg, #ff5e7e, #ff8a3d); }
.d2 { background: linear-gradient(135deg, #3aa0ff, #7c4dff); }
.d3 { background: linear-gradient(135deg, #12d8a0, #3aa0ff); }

/* ---------- 通用区块 ---------- */
section {
  max-width: 1120px;
  margin: 0 auto;
  padding: 5rem 1.5rem;
}

.sec-head { text-align: center; margin-bottom: 3rem; }

.sec-head .eyebrow {
  display: inline-block;
  font-size: 0.74rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--pink);
  margin-bottom: 0.5rem;
}

.sec-head h2 {
  font-size: 1.95rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--deep);
}

.sec-head .rule {
  width: 56px;
  height: 4px;
  border-radius: 999px;
  background: var(--grad);
  margin: 1rem auto 0;
}

.sec-head p.lead {
  max-width: 46em;
  margin: 1.1rem auto 0;
  color: var(--muted);
  font-size: 0.96rem;
}

/* ---------- 功能特性 ---------- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 2rem 1.7rem;
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  border-color: transparent;
}

.card .icon {
  width: 54px;
  height: 54px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 1.1rem;
}

.card h3 { font-size: 1.12rem; color: var(--deep); margin-bottom: 0.5rem; }
.card p { font-size: 0.9rem; color: var(--muted); }

.i1 { background: linear-gradient(135deg, #ff5e7e, #ff8a3d); }
.i2 { background: linear-gradient(135deg, #3aa0ff, #7c4dff); }
.i3 { background: linear-gradient(135deg, #12d8a0, #3aa0ff); }
.i4 { background: linear-gradient(135deg, #ffcf33, #ff8a3d); }
.i5 { background: linear-gradient(135deg, #7c4dff, #ff4fa3); }
.i6 { background: linear-gradient(135deg, #ff4fa3, #ff8a3d); }

/* ---------- 重要说明 ---------- */
.notice {
  background: linear-gradient(135deg, #fff6ea 0%, #fdf0fb 100%);
  border: 1px solid #ffe2c4;
  border-radius: 22px;
  padding: 2.4rem 2.2rem;
}

.notice h3 {
  color: #d2691e;
  font-size: 1.2rem;
  margin-bottom: 0.8rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.notice p { color: var(--muted); font-size: 0.94rem; margin-bottom: 0.7rem; }
.notice p:last-child { margin-bottom: 0; }
.notice strong { color: var(--deep); }

/* ---------- 截图 ---------- */
.shots {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.6rem;
  justify-items: center;
}

.shot {
  width: 100%;
  max-width: 210px;
  aspect-ratio: 9 / 17;
  border-radius: 24px;
  padding: 1rem 0.85rem;
  color: #fff;
  box-shadow: 0 16px 34px rgba(42, 32, 80, 0.16);
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.shot h4 { font-size: 0.95rem; letter-spacing: 0.05em; }
.shot .cap { font-size: 0.7rem; opacity: 0.85; margin-bottom: 0.4rem; }

.shot .line { height: 9px; border-radius: 999px; background: rgba(255, 255, 255, 0.5); }
.shot .line.w70 { width: 70%; }
.shot .line.w50 { width: 50%; }
.shot .block { flex: 1; border-radius: 12px; background: rgba(255, 255, 255, 0.9); }

.s1 { background: linear-gradient(160deg, #7c4dff, #ff4fa3); }
.s2 { background: linear-gradient(160deg, #3aa0ff, #7c4dff); }
.s3 { background: linear-gradient(160deg, #12d8a0, #3aa0ff); }
.s4 { background: linear-gradient(160deg, #ff8a3d, #ff4fa3); }

/* ---------- 下载 ---------- */
.download {
  background: var(--grad);
  border-radius: 26px;
  padding: 3.2rem 2.5rem;
  color: #fff;
  text-align: center;
  box-shadow: 0 24px 54px rgba(255, 79, 163, 0.3);
}

.download h3 { font-size: 1.7rem; letter-spacing: 0.08em; margin-bottom: 0.7rem; }
.download p { color: rgba(255, 255, 255, 0.85); font-size: 0.96rem; margin-bottom: 1.8rem; }
.download .actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

.btn-white {
  background: #fff;
  color: var(--violet);
  font-weight: 600;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.12);
}

.btn-white:hover { transform: translateY(-2px); }

.btn-ghostw {
  border: 1px solid rgba(255, 255, 255, 0.6);
  color: #fff;
}

.btn-ghostw:hover { background: rgba(255, 255, 255, 0.14); }

/* ---------- 文档页（隐私/协议/支持） ---------- */
.doc-hero {
  padding: 4rem 1.5rem 2.5rem;
  text-align: center;
  background:
    radial-gradient(ellipse at 20% 10%, rgba(124, 77, 255, 0.2), transparent 55%),
    radial-gradient(ellipse at 85% 90%, rgba(255, 79, 163, 0.18), transparent 55%),
    linear-gradient(160deg, #fbf6ff, #fff4f1);
}

.doc-hero h1 {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  color: var(--deep);
  letter-spacing: 0.06em;
}

.doc-hero p { color: var(--muted); font-size: 0.9rem; margin-top: 0.6rem; }

.doc {
  max-width: 900px;
  margin: 0 auto;
  padding: 3rem 1.6rem 5rem;
}

.doc h2 {
  font-size: 1.25rem;
  color: var(--deep);
  margin: 2.2rem 0 0.8rem;
  padding-left: 0.8rem;
  border-left: 4px solid;
  border-image: var(--grad) 1;
}

.doc h2:first-child { margin-top: 0; }

.doc p, .doc li { color: var(--muted); font-size: 0.95rem; }
.doc ul { margin: 0.6rem 0 0.6rem 1.3rem; }
.doc li { margin-bottom: 0.35rem; }
.doc strong { color: var(--deep); }
.doc .updated { color: #a99fc4; font-size: 0.82rem; margin-bottom: 1.5rem; }

.doc table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.9rem;
}

.doc th, .doc td {
  border: 1px solid var(--line);
  padding: 0.7rem 0.9rem;
  text-align: left;
  color: var(--muted);
}

.doc th { background: var(--bg-soft); color: var(--deep); font-weight: 600; }

.faq {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.4rem 1.6rem;
  margin-bottom: 1rem;
}

.faq h4 { color: var(--deep); font-size: 1rem; margin-bottom: 0.45rem; }
.faq p { font-size: 0.92rem; }

.contact-card {
  margin-top: 2rem;
  background: linear-gradient(135deg, #f6f0ff, #fff1f6);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 1.8rem 1.8rem;
}

.contact-card h3 { color: var(--deep); margin-bottom: 0.8rem; }
.contact-card p { font-size: 0.94rem; margin-bottom: 0.35rem; }
.contact-card a { color: var(--violet); text-decoration: none; font-weight: 600; }

/* ---------- 底部 ---------- */
footer {
  margin-top: 3rem;
  background: linear-gradient(160deg, #241c3f, #2f2157);
  color: #b7b0cc;
  padding: 3rem 1.5rem 2rem;
  text-align: center;
  font-size: 0.86rem;
}

footer .co-name {
  color: #fff;
  font-size: 1.1rem;
  letter-spacing: 0.12em;
  margin-bottom: 0.6rem;
}

footer .desc { max-width: 46em; margin: 0.4rem auto 1.2rem; color: #9b93b8; }

footer .links {
  display: flex;
  gap: 1.4rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 1.2rem;
}

footer .links a { color: #cfc7e6; text-decoration: none; transition: color 0.2s; }
footer .links a:hover { color: #fff; }

footer .beians {
  display: flex;
  gap: 0.8rem;
  justify-content: center;
  flex-wrap: wrap;
}

footer .beian {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 1.1rem;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 999px;
  color: #ded8ee;
  text-decoration: none;
  transition: background 0.25s;
}

footer .beian:hover { background: rgba(255, 255, 255, 0.1); }

footer .fine {
  margin-top: 1.6rem;
  padding-top: 1.2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.78rem;
  color: #837b9e;
}

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; text-align: center; }
  .hero .actions { justify-content: center; }
  .hero-visual { order: -1; }
  .phone { width: 210px; }
}

@media (max-width: 620px) {
  nav { flex-wrap: wrap; }
  nav ul { width: 100%; justify-content: space-between; gap: 0.5rem; font-size: 0.82rem; flex-wrap: wrap; }
  section { padding: 3.5rem 1.2rem; }
  .doc { padding: 2.4rem 1.2rem 4rem; }
}