/* ============================================================
   习悦星 BabyHabit 官方网站 · 设计系统 v3
   风格：温馨幸福 + 活跃（家庭亲子向）
   背景：极光渐变（活跃）· 主色：蜜桃橙 → 珊瑚（温馨，呼应吉祥物黄星/橙腮红）
        主文字：柔和暖紫灰（去深沉感）· 点缀：奶油橙 #FFF1E3 / 腮红粉 #FF5E8A
   ============================================================ */

/* ---------- 变量 ---------- */
:root {
  --ink: #453a63;            /* 主文字：柔和暖紫灰（温暖不低沉） */
  --ink-soft: #5a4d80;
  --ink-light: #6e6296;
  --primary: #ff8a5c;        /* 蜜桃橙（主 CTA） */
  --primary-deep: #e85a4a;   /* 珊瑚橙红 */
  --primary-soft: #fff1e3;   /* 奶油橙 */
  --sky-50: #fdf6ef;
  --sky-100: #fae8d9;
  --sky-200: #f5d5b8;
  --cloud: #ffffff;
  --accent: #ffb25e;         /* 暖橙星（呼应吉祥物） */
  --accent-deep: #e8781f;
  --pink: #ff5e8a;           /* 腮红粉 */
  --teal: #14b8a6;
  --green: #22c55e;
  --text: #554a72;
  --text-secondary: #7d71a0;
  --border: #f7e9dd;
  --shadow-sm: 0 2px 10px rgba(200, 110, 60, 0.10);
  --shadow-md: 0 12px 32px rgba(200, 110, 60, 0.14);
  --shadow-lg: 0 24px 60px rgba(200, 110, 60, 0.18);
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 28px;
  --radius-xl: 40px;
  --font-title: 'ZCOOL KuaiLe', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-body: 'Nunito', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', system-ui, sans-serif;
  --maxw: 1160px;
  --aurora: linear-gradient(160deg, #4facfe 0%, #00f2fe 52%, #43e97b 100%);
  --grad-primary: linear-gradient(135deg, #ffb25e 0%, #ff7a4c 100%);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--text);
  background:
    radial-gradient(900px 480px at 6% -6%, rgba(255, 236, 210, 0.55) 0%, rgba(255, 236, 210, 0) 60%),
    radial-gradient(1100px 560px at 90% -10%, rgba(255, 255, 255, 0.5) 0%, rgba(255, 255, 255, 0) 60%),
    var(--aurora);
  background-attachment: fixed;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* 网格噪点背景叠加 */
.bg-noise::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.5;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23n)' opacity='0.035'/%3E%3C/svg%3E");
  z-index: 0;
}

/* ---------- 排版 ---------- */
h1, h2, h3, .font-title { font-family: var(--font-title); font-weight: 400; letter-spacing: 0.02em; }

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--primary-deep);
  background: var(--primary-soft);
  border: 1px solid var(--sky-100);
  padding: 6px 14px;
  border-radius: 999px;
  text-transform: uppercase;
}

.section-title {
  font-size: clamp(28px, 4.6vw, 42px);
  color: var(--ink);
  line-height: 1.25;
  margin: 16px 0 14px;
}

.section-sub {
  font-size: clamp(15px, 2vw, 17px);
  color: var(--text-secondary);
  max-width: 640px;
}

/* 加载错落揭示 */
@keyframes rise {
  from { opacity: 0; transform: translateY(26px); }
  to   { opacity: 1; transform: translateY(0); }
}
.reveal {
  opacity: 0;
  animation: rise 0.7s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}
.reveal.d1 { animation-delay: 0.08s; }
.reveal.d2 { animation-delay: 0.18s; }
.reveal.d3 { animation-delay: 0.28s; }
.reveal.d4 { animation-delay: 0.38s; }
.reveal.d5 { animation-delay: 0.48s; }
.reveal.d6 { animation-delay: 0.58s; }

/* 滚动触发 */
.scroll-in { opacity: 0; transform: translateY(30px); transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.22, 1, 0.36, 1); }
.scroll-in.visible { opacity: 1; transform: translateY(0); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--font-body);
  font-weight: 800;
  font-size: 16px;
  padding: 14px 30px;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}
.btn:active { transform: scale(0.97); }

/* 主按钮：蜜桃橙渐变 + 深暖棕文字（对比清晰，温馨有幸福感） */
.btn-primary {
  color: #462a2a;
  background: var(--grad-primary);
  box-shadow: 0 10px 24px rgba(255, 122, 76, 0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(232, 90, 74, 0.42); }

.btn-dark {
  color: #462a2a;
  background: var(--grad-primary);
  box-shadow: 0 10px 24px rgba(255, 122, 76, 0.32);
}
.btn-dark:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(232, 90, 74, 0.4); }

.btn-ghost {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.92);
  border: 2px solid var(--sky-100);
  box-shadow: var(--shadow-sm);
}
.btn-ghost:hover { border-color: var(--primary); transform: translateY(-2px); }

.btn-lg { padding: 17px 40px; font-size: 17px; }
.btn-sm { padding: 9px 20px; font-size: 14px; }

/* ---------- 导航 ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: blur(16px) saturate(1.4);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  border-bottom: 1px solid rgba(26, 26, 46, 0.08);
}
.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand img { width: 42px; height: 42px; border-radius: 12px; }
.brand-name { font-family: var(--font-title); font-size: 22px; color: var(--ink); }

.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a {
  font-weight: 700;
  color: var(--ink-light);
  position: relative;
  padding: 6px 2px;
  transition: color 0.2s ease;
}
.nav-links a:hover, .nav-links a.active { color: var(--ink); }
/* 导航内的按钮文字：覆盖 .nav-links a 的颜色，保证按钮文字清晰 */
.nav-links a.btn { color: #462a2a; }
.nav-links a.btn:hover { color: #462a2a; }
.nav-links a:not(.btn)::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--accent), var(--pink));
  transition: width 0.25s ease;
}
.nav-links a:not(.btn):hover::after, .nav-links a:not(.btn).active::after { width: 100%; }

.nav-cta { margin-left: 8px; }

.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  border: none;
  background: #fff;
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  gap: 4px;
}
.nav-toggle span {
  display: block;
  width: 20px; height: 2.6px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.2s ease;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(6.6px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-6.6px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 76px 0 96px;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  top: -140px; right: -120px;
  width: 460px; height: 460px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.45) 0%, rgba(255, 255, 255, 0) 70%);
}
.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.06fr 0.94fr;
  align-items: center;
  gap: 40px;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--sky-100);
  color: var(--ink-soft);
  font-size: 13.5px;
  font-weight: 700;
  padding: 8px 16px;
  border-radius: 999px;
  box-shadow: var(--shadow-sm);
}
.hero-eyebrow .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 4px rgba(34,197,94,0.2); }

.hero h1 {
  font-size: clamp(38px, 6vw, 64px);
  line-height: 1.12;
  color: var(--ink);
  margin: 22px 0 18px;
}
.hero h1 .hl {
  background: linear-gradient(120deg, #ff9a5c 0%, #ff5e8a 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero p.lead {
  font-size: clamp(16px, 2.2vw, 19px);
  color: var(--ink-soft);
  max-width: 520px;
  margin-bottom: 32px;
}

.hero-cta { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }

.hero-meta {
  display: flex;
  align-items: center;
  gap: 26px;
  margin-top: 40px;
  padding-top: 26px;
  border-top: 1px dashed rgba(122, 78, 46, 0.3);
}
.hero-meta .stat b { display: block; font-family: var(--font-title); font-size: 26px; color: var(--ink); line-height: 1.2; }
.hero-meta .stat span { font-size: 13px; color: var(--ink-light); }

/* Hero 视觉 */
.hero-visual { position: relative; }
.hero-blob {
  position: absolute;
  inset: 4% 2%;
  border-radius: 46% 54% 60% 40% / 48% 42% 58% 52%;
  background: rgba(255, 255, 255, 0.85);
  box-shadow: var(--shadow-lg);
  animation: blob 9s ease-in-out infinite;
}
@keyframes blob {
  0%, 100% { border-radius: 46% 54% 60% 40% / 48% 42% 58% 52%; }
  50% { border-radius: 56% 44% 44% 56% / 52% 58% 42% 48%; }
}
.hero-mascot {
  position: relative;
  width: 72%;
  margin: 0 auto;
  animation: float 5s ease-in-out infinite;
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}

.float-item {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 74px; height: 74px;
  border-radius: 26px;
  background: #fff;
  box-shadow: 0 10px 26px rgba(255, 138, 92, 0.32);
  font-size: 30px;
  animation: float 5.4s ease-in-out infinite;
}
.float-item.f1 { top: 6%; left: 0; animation-delay: 0.4s; }
.float-item.f2 { top: 34%; right: -4px; animation-delay: 1.1s; }
.float-item.f3 { bottom: 8%; left: 8%; animation-delay: 1.8s; }
.float-item .lbl {
  position: absolute;
  bottom: -8px;
  font-size: 11px;
  font-weight: 700;
  color: #fff;
  background: var(--ink);
  padding: 2px 10px;
  border-radius: 999px;
  white-space: nowrap;
}

/* ---------- 通用区块 ---------- */
.section { padding: 84px 0; }
.section-head { text-align: center; margin-bottom: 52px; }
.section-head .section-sub { margin: 0 auto; }

/* ---------- 特性卡片 ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  position: relative;
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: var(--radius-md);
  padding: 30px 26px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  overflow: hidden;
}
.feature-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 5px;
  background: linear-gradient(90deg, var(--primary), var(--pink));
  opacity: 0;
  transition: opacity 0.25s ease;
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.feature-card:hover::before { opacity: 1; }

.feature-icon {
  width: 60px; height: 60px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  margin-bottom: 18px;
  background: linear-gradient(150deg, var(--primary-soft), #fff);
  border: 1px solid var(--sky-100);
}
.feature-card h3 { font-size: 20px; color: var(--ink); margin-bottom: 8px; }
.feature-card p { font-size: 14.5px; color: var(--text-secondary); }
.feature-tag {
  display: inline-block;
  margin-top: 14px;
  font-size: 12px;
  font-weight: 700;
  color: var(--primary-deep);
  background: var(--primary-soft);
  padding: 4px 12px;
  border-radius: 999px;
}

/* ---------- 双视角 ---------- */
.duo-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.duo-card {
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  position: relative;
  overflow: hidden;
}
.duo-card.parent { background: linear-gradient(160deg, #e2576b 0%, #a8446a 85%); color: #fff2f4; }
.duo-card.child  { background: rgba(255, 255, 255, 0.95); border: 1px solid var(--sky-100); color: var(--ink); }
.duo-card .who { font-family: var(--font-title); font-size: 30px; margin-bottom: 6px; }
.duo-card .sub { font-size: 14px; opacity: 0.78; margin-bottom: 22px; }
.duo-card ul li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 11px 0;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.2);
  font-size: 15px;
}
.duo-card.child ul li { border-color: rgba(26, 26, 46, 0.1); }
.duo-card ul li:last-child { border-bottom: none; }
.duo-card ul li .ck {
  flex: none;
  width: 24px; height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: #fff;
  background: var(--green);
  margin-top: 2px;
}

/* ---------- 游戏化 ---------- */
.game-band {
  border-radius: var(--radius-xl);
  background:
    radial-gradient(700px 300px at 90% 0%, rgba(255, 138, 92, 0.28) 0%, rgba(255, 138, 92, 0) 60%),
    linear-gradient(150deg, #6b3a5e 0%, #3d1f3a 100%);
  color: #fff2ef;
  padding: 64px 56px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  box-shadow: var(--shadow-lg);
}
.game-band h2 { font-size: clamp(26px, 3.4vw, 36px); margin-bottom: 14px; }
.game-band p { color: #c4ccf0; font-size: 15.5px; }
.game-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.game-chip {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius-md);
  padding: 22px 18px;
  text-align: center;
  transition: transform 0.22s ease, background 0.22s ease;
}
.game-chip:hover { transform: translateY(-5px); background: rgba(255, 255, 255, 0.14); }
.game-chip .ico { font-size: 34px; margin-bottom: 10px; }
.game-chip b { display: block; font-family: var(--font-title); font-size: 17px; margin-bottom: 4px; }
.game-chip span { font-size: 12.5px; color: #e8c3d0; }

/* ---------- 数据安全 ---------- */
.trust-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 40px;
}
.trust-item {
  display: flex;
  gap: 14px;
  align-items: center;
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid var(--sky-100);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  box-shadow: var(--shadow-sm);
}
.trust-item .ico { font-size: 26px; }
.trust-item b { display: block; font-size: 15px; color: var(--ink); }
.trust-item span { font-size: 12.5px; color: var(--text-secondary); }

/* ---------- CTA ---------- */
.cta-band {
  position: relative;
  border-radius: var(--radius-xl);
  background: var(--grad-primary);
  color: #fff;
  text-align: center;
  padding: 72px 32px;
  overflow: hidden;
  box-shadow: 0 30px 60px rgba(255, 122, 76, 0.35);
}
.cta-band::before {
  content: "★";
  position: absolute;
  top: -40px; left: 8%;
  font-size: 180px;
  color: rgba(255, 255, 255, 0.14);
  transform: rotate(-14deg);
}
.cta-band::after {
  content: "★";
  position: absolute;
  bottom: -56px; right: 6%;
  font-size: 220px;
  color: rgba(255, 255, 255, 0.12);
  transform: rotate(18deg);
}
.cta-band h2 { font-size: clamp(28px, 4.4vw, 44px); margin-bottom: 12px; position: relative; }
.cta-band p { font-size: 16.5px; opacity: 0.94; margin-bottom: 30px; position: relative; }
.cta-band .btn { background: #fff; color: #462a2a; box-shadow: 0 14px 30px rgba(0,0,0,0.16); position: relative; }
.cta-band .btn:hover { transform: translateY(-2px); }
.cta-note { margin-top: 16px; font-size: 13px; opacity: 0.85; position: relative; }

/* ---------- 下载页 ---------- */
.dl-hero { text-align: center; padding: 64px 0 24px; position: relative; }
.dl-hero .mascot-mini { width: 96px; margin: 0 auto 10px; animation: float 5s ease-in-out infinite; }
.dl-hero h1 { font-size: clamp(32px, 5vw, 52px); margin-bottom: 10px; }
.dl-hero .ver-badge {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--sky-100);
  box-shadow: var(--shadow-sm);
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 700;
  color: var(--ink-soft);
}
.dl-hero .ver-badge .tag {
  background: var(--grad-primary);
  color: #462a2a;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 800;
}

.dl-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; margin-top: 44px; }
.dl-card {
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: var(--radius-lg);
  padding: 38px 34px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  position: relative;
  overflow: hidden;
}
.dl-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.dl-card .plat {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 8px;
}
.dl-card .plat .logo { width: 46px; height: 46px; border-radius: 13px; display: flex; align-items: center; justify-content: center; font-size: 24px; }
.dl-card .plat b { font-family: var(--font-title); font-size: 24px; color: var(--ink); }
.dl-card .desc { font-size: 14.5px; color: var(--text-secondary); margin-bottom: 22px; }
.dl-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  border: none;
  border-radius: 16px;
  padding: 18px 22px;
  font-family: var(--font-body);
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
  margin-bottom: 12px;
  text-align: left;
}
.dl-btn:hover { transform: translateY(-2px); }
.dl-btn .t b { display: block; font-size: 16.5px; color: #fff; font-weight: 800; }
.dl-btn .t span { font-size: 12.5px; color: rgba(255, 255, 255, 0.92); }
.dl-btn .arrow { font-size: 20px; color: #fff; flex: none; }
.dl-btn.android { background: linear-gradient(135deg, #15803d, #166534); box-shadow: 0 10px 24px rgba(34, 197, 94, 0.32); }
.dl-btn.test { background: linear-gradient(135deg, #64748b, #475569); box-shadow: 0 10px 22px rgba(71, 85, 105, 0.25); }
.dl-btn.ios { background: linear-gradient(135deg, #0ea5e9, #0284c7); box-shadow: 0 10px 24px rgba(14, 165, 233, 0.32); }
.dl-btn.store { background: var(--grad-primary); box-shadow: 0 10px 24px rgba(255, 122, 76, 0.36); }
/* 暖橙底上使用深暖棕文字，保证对比清晰 */
.dl-btn.store .t b, .dl-btn.store .t span, .dl-btn.store .arrow { color: #462a2a; }
.dl-btn.outline {
  background: #fff;
  border: 2px solid var(--sky-100);
  color: var(--ink);
}
.dl-btn.outline .t b { color: var(--ink); }
.dl-btn.outline .t span { color: var(--text-secondary); }
.dl-btn.outline .arrow { color: var(--primary); }
.dl-btn.outline:hover { border-color: var(--primary); }
.dl-btn.coming { background: #e9eef7; cursor: not-allowed; }
.dl-btn.coming .t b, .dl-btn.coming .t span, .dl-btn.coming .arrow { color: #7590b5; }

.dl-extra {
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px dashed rgba(122, 78, 46, 0.25);
  font-size: 13px;
  color: var(--text-secondary);
}

/* 安装说明步骤 */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 56px; counter-reset: step; }
.step {
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  position: relative;
  box-shadow: var(--shadow-sm);
}
.step .num {
  counter-increment: step;
  width: 44px; height: 44px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-title);
  font-size: 22px;
  color: #462a2a;
  background: var(--grad-primary);
  margin-bottom: 16px;
  box-shadow: 0 8px 18px rgba(255, 122, 76, 0.35);
}
.step .num::before { content: counter(step); }
.step h3 { font-size: 18px; color: var(--ink); margin-bottom: 8px; }
.step p { font-size: 14px; color: var(--text-secondary); }

/* ---------- 功能页 ---------- */
.feat-detail { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.feat-row {
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: var(--radius-md);
  padding: 30px 28px;
  display: flex;
  gap: 20px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.22s ease, box-shadow 0.22s ease;
}
.feat-row:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.feat-row .ico {
  flex: none;
  width: 56px; height: 56px;
  border-radius: 16px;
  background: var(--primary-soft);
  border: 1px solid var(--sky-100);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
}
.feat-row h3 { font-size: 19px; color: var(--ink); margin-bottom: 6px; }
.feat-row p { font-size: 14px; color: var(--text-secondary); }
.feat-row ul { margin-top: 10px; }
.feat-row ul li { font-size: 13.5px; color: var(--text-secondary); padding: 3px 0; }
.feat-row ul li::before { content: "· "; color: var(--primary); font-weight: 900; }

/* ---------- 指南页 ---------- */
.guide-steps { max-width: 760px; margin: 0 auto; }
.guide-step {
  display: flex;
  gap: 22px;
  padding: 26px 0;
  position: relative;
}
.guide-step::before {
  content: "";
  position: absolute;
  left: 25px; top: 66px; bottom: -22px;
  width: 2px;
  background: linear-gradient(var(--sky-200), rgba(255, 255, 255, 0.4));
}
.guide-step:last-child::before { display: none; }
.guide-step .dot {
  flex: none;
  width: 52px; height: 52px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--sky-100);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  box-shadow: var(--shadow-sm);
}
.guide-step h3 { font-size: 20px; color: var(--ink); margin-bottom: 8px; }
.guide-step p { font-size: 15px; color: var(--text-secondary); max-width: 560px; }

/* ---------- 隐私页 ---------- */
.legal { max-width: 820px; margin: 0 auto; }
.legal .card {
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: var(--radius-lg);
  padding: 40px 42px;
  box-shadow: var(--shadow-sm);
}
.legal h2 { font-size: 22px; color: var(--ink); margin: 28px 0 10px; }
.legal h2:first-child { margin-top: 0; }
.legal p, .legal li { font-size: 15px; color: var(--text-secondary); margin-bottom: 10px; }
.legal ul { padding-left: 4px; }
.legal ul li { padding-left: 20px; position: relative; }
.legal ul li::before { content: "•"; position: absolute; left: 0; color: var(--primary); font-weight: 900; }

/* ---------- FAQ ---------- */
.faq-list { max-width: 760px; margin: 0 auto; }
.faq-item {
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.faq-q {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  border: none;
  background: none;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  cursor: pointer;
  text-align: left;
}
.faq-q .arr { font-size: 18px; color: var(--primary); transition: transform 0.25s ease; flex: none; }
.faq-item.open .arr { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; }
.faq-a-inner { padding: 0 24px 22px; font-size: 14.5px; color: var(--text-secondary); }

/* ---------- Footer ---------- */
.footer {
  margin-top: 90px;
  background: linear-gradient(160deg, #3d2145 0%, #241028 100%);
  color: #d8c2dd;
}
.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 56px 24px 32px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
}
.footer .brand-name { color: #fff; }
.footer .brand-desc { font-size: 14px; margin-top: 14px; line-height: 1.8; max-width: 300px; }
.footer h4 { font-family: var(--font-title); font-weight: 400; font-size: 16px; color: #fff; margin-bottom: 16px; }
.footer ul li { margin-bottom: 10px; }
.footer ul a { font-size: 14px; color: #c9a7d4; transition: color 0.2s ease; }
.footer ul a:hover { color: #fff; }
.footer .contact p { font-size: 14px; margin-bottom: 8px; }
.footer-bottom {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 20px 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 13px;
  color: #a98ab8;
}
.footer-bottom a { color: #a98ab8; text-decoration: underline; transition: color 0.2s ease; }
.footer-bottom a:hover { color: #fff; }
.footer-bottom .dot { font-style: normal; margin: 0 6px; opacity: 0.6; }

/* ============================================================
   响应式 · PC / 平板 / 手机 三端适配
   ============================================================ */

/* 平板横屏 / 大屏笔记本（≤1024px） */
@media (max-width: 1024px) {
  .container { padding: 0 20px; }
  .nav-inner { padding: 12px 20px; }
  .hero-grid { gap: 28px; }
  .game-band { padding: 52px 40px; gap: 30px; }
}

/* 平板竖屏（≤900px）*/
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; text-align: center; }
  .hero p.lead { margin-left: auto; margin-right: auto; }
  .hero-cta { justify-content: center; }
  .hero-meta { justify-content: center; }
  .hero-visual { max-width: 460px; margin: 0 auto; order: -1; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .duo-grid, .dl-grid, .feat-detail { grid-template-columns: 1fr; }
  .game-band { grid-template-columns: 1fr; padding: 44px 30px; }
  .trust-strip { grid-template-columns: 1fr 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .dl-card { max-width: 560px; margin-left: auto; margin-right: auto; }
}

/* 平板小屏 / 大屏手机（≤768px）*/
@media (max-width: 768px) {
  .steps { grid-template-columns: 1fr 1fr; }
  .game-cards { grid-template-columns: repeat(3, 1fr); gap: 12px; }
  .section { padding: 64px 0; }
  .cta-band { padding: 56px 24px; }
}

/* 手机（≤640px）*/
@media (max-width: 640px) {
  .nav-links {
    position: absolute;
    top: 100%; left: 0; right: 0;
    flex-direction: column;
    background: rgba(255, 255, 255, 0.98);
    padding: 18px 24px 24px;
    gap: 6px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 10px 4px; width: 100%; }
  .nav-cta { margin-left: 0; margin-top: 6px; width: 100%; text-align: center; }
  .nav-toggle { display: flex; }
  .feature-grid, .steps, .trust-strip, .game-cards { grid-template-columns: 1fr; }
  .hero { padding: 48px 0 64px; }
  .hero h1 { font-size: clamp(32px, 10vw, 42px); }
  .section { padding: 56px 0; }
  .float-item { width: 58px; height: 58px; font-size: 24px; border-radius: 18px; }
  .float-item .lbl { display: none; }
  .dl-card { padding: 30px 22px; }
  .dl-btn { padding: 16px 18px; }
  .legal .card { padding: 28px 22px; }
  .footer-inner { grid-template-columns: 1fr; gap: 30px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .guide-step { gap: 16px; }
  .duo-card { padding: 28px 24px; }
}