/* ════════════════════════════════════════════════════════════════
   APRSlocus 官网样式 · 毛玻璃玻璃态（Glassmorphism）
   目录：
   01. 变量与基础
   02. 全屏光斑背景
   03. 通用容器 / 区块头
   04. 导航栏
   05. Hero 与按钮
   06. 手机模拟器
   07. 数据统计
   08. 功能卡片
   09. 平台下载
   10. 快速上手
   11. 产品展示（信标 / 符号 / 跑马灯）
   12. FAQ
   13. 社区
   14. 页脚
   15. 悬浮工具（回到顶部 / Toast / 进度条）
   16. 细节交互
   17. 响应式与动效偏好
   ════════════════════════════════════════════════════════════════ */

/* ── 01. 变量与基础 ── */
:root {
  --glass: rgba(255, 255, 255, .52);          /* 玻璃卡片底色 */
  --line: rgba(255, 255, 255, .65);           /* 玻璃描边（亮） */
  --text: #0f172a;
  --text-dim: #4b5a75;
  --text-faint: #8494ad;
  --cyan: #0284c7;
  --blue: #2563eb;
  --green: #10b981;
  --amber: #d97706;
  --red: #ef4444;
  --grad: linear-gradient(120deg, #38bdf8, #6366f1 55%, #a855f7);
  --radius: 18px;
  --shadow: 0 18px 50px rgba(45, 70, 120, .14);
  --shadow-hover: 0 26px 64px rgba(45, 70, 120, .22);
  --ease: cubic-bezier(.22, .8, .24, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background:
    radial-gradient(1200px 700px at 85% -10%, rgba(56, 189, 248, .16), transparent 60%),
    radial-gradient(1000px 600px at 0% 40%, rgba(168, 85, 247, .12), transparent 60%),
    radial-gradient(1100px 700px at 90% 100%, rgba(16, 185, 129, .10), transparent 60%),
    linear-gradient(180deg, #f3f6fd 0%, #eaf0fb 100%);
  background-attachment: fixed;
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
code {
  font-family: ui-monospace, "SF Mono", Consolas, "Courier New", monospace;
  background: rgba(14, 165, 233, .12);
  color: #0369a1;
  padding: .1em .4em;
  border-radius: 6px;
  font-size: .9em;
}
::selection { background: rgba(99, 102, 241, .2); }
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(120, 140, 180, .35); border-radius: 8px; }
::-webkit-scrollbar-thumb:hover { background: rgba(120, 140, 180, .55); }

/* ── 02. 全屏漂浮渐变色块（玻璃后面的光斑） ── */
.bg-blobs { position: fixed; inset: 0; z-index: 0; overflow: hidden; pointer-events: none; }
.blob { position: absolute; border-radius: 50%; filter: blur(72px); opacity: .55; will-change: transform; }
.blob.b1 { width: 520px; height: 520px; left: -140px; top: -120px; background: radial-gradient(circle at 30% 30%, rgba(56, 189, 248, .6), rgba(56, 189, 248, 0) 70%); animation: drift1 26s ease-in-out infinite; }
.blob.b2 { width: 460px; height: 460px; right: -120px; top: 12%; background: radial-gradient(circle at 60% 40%, rgba(168, 85, 247, .5), rgba(168, 85, 247, 0) 70%); animation: drift2 32s ease-in-out infinite; }
.blob.b3 { width: 480px; height: 480px; left: 16%; bottom: -160px; background: radial-gradient(circle at 50% 50%, rgba(16, 185, 129, .45), rgba(16, 185, 129, 0) 70%); animation: drift3 29s ease-in-out infinite; }
.blob.b4 { width: 420px; height: 420px; right: 14%; bottom: 8%; background: radial-gradient(circle at 40% 60%, rgba(244, 114, 182, .42), rgba(244, 114, 182, 0) 70%); animation: drift2 36s ease-in-out infinite reverse; }
@keyframes drift1 { 0%, 100% { transform: translate(0, 0) scale(1); } 50% { transform: translate(70px, 50px) scale(1.12); } }
@keyframes drift2 { 0%, 100% { transform: translate(0, 0) scale(1.05); } 50% { transform: translate(-60px, 40px) scale(.95); } }
@keyframes drift3 { 0%, 100% { transform: translate(0, 0) scale(1); } 50% { transform: translate(50px, -60px) scale(1.1); } }

/* ── 03. 通用容器 / 区块头 ── */
.section { position: relative; z-index: 1; padding: 108px clamp(20px, 6vw, 96px); }
.section.alt {
  background: linear-gradient(180deg, rgba(255, 255, 255, .28), rgba(255, 255, 255, .16));
  border-top: 1px solid rgba(255, 255, 255, .5);
  border-bottom: 1px solid rgba(255, 255, 255, .5);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.section-head { max-width: 720px; margin: 0 0 54px; }
.section-head::before {
  content: ""; display: block; width: 42px; height: 3px; border-radius: 3px;
  background: var(--grad); margin-bottom: 18px;
}
.section-head h2 { font-size: clamp(30px, 4.6vw, 46px); font-weight: 800; letter-spacing: -.02em; line-height: 1.2; }
.section-head p { color: var(--text-dim); margin-top: 14px; font-size: 16.5px; }

/* ── 04. 导航栏 ── */
.nav { position: fixed; inset: 0 0 auto 0; z-index: 100; padding: 18px 0; transition: all .4s var(--ease); }
.nav-inner {
  max-width: 1200px; margin: 0 auto; padding: 0 clamp(18px, 4vw, 40px);
  display: flex; align-items: center; justify-content: space-between;
}
.nav.scrolled {
  padding: 10px 0;
  background: rgba(255, 255, 255, .6);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border-bottom: 1px solid rgba(255, 255, 255, .6);
  box-shadow: 0 10px 30px rgba(45, 70, 120, .08);
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-logo { width: 40px; height: 40px; border-radius: 12px; object-fit: cover; box-shadow: 0 8px 22px rgba(56, 189, 248, .4); transition: transform .4s var(--ease); }
.brand:hover .brand-logo { transform: rotate(-6deg) scale(1.06); }
.brand-name { font-weight: 800; font-size: 19px; letter-spacing: -.02em; }
.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a { position: relative; padding: 9px 14px; border-radius: 12px; font-size: 14.5px; color: var(--text-dim); transition: color .25s, background .25s, box-shadow .25s; }
.nav-links a:hover { color: var(--text); background: rgba(255, 255, 255, .55); box-shadow: 0 4px 14px rgba(45, 70, 120, .06); }
.nav-links a::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 5px; height: 2px;
  border-radius: 2px; background: var(--grad);
  transform: scaleX(0); transform-origin: left; transition: transform .3s var(--ease);
}
.nav-links a:hover::after, .nav-links a.active::after { transform: scaleX(1); }
.nav-links a.active { color: var(--text); }
.nav-links .nav-cta {
  margin-left: 10px; color: #fff; font-weight: 700; background: var(--grad);
  padding: 10px 18px; border-radius: 12px; box-shadow: 0 10px 26px rgba(99, 102, 241, .38);
}
.nav-links .nav-cta::after { display: none; }
.nav-links .nav-cta:hover { color: #fff; filter: brightness(1.06); background: var(--grad); box-shadow: 0 14px 30px rgba(99, 102, 241, .46); }
.nav-burger { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-burger span { width: 24px; height: 2px; background: var(--text); border-radius: 2px; transition: .3s var(--ease); }
.nav-burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-burger.open span:nth-child(2) { opacity: 0; }
.nav-burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── 05. Hero 与按钮 ── */
.hero {
  position: relative; z-index: 1; min-height: 100vh; display: flex; align-items: center;
  padding: 140px clamp(20px, 6vw, 96px) 80px; overflow: hidden;
}
.hero-canvas { position: absolute; inset: 0; z-index: 0; opacity: .7; }
.hero-grid {
  position: absolute; inset: 0; z-index: 0; opacity: .5;
  background-image:
    linear-gradient(rgba(120, 150, 200, .08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120, 150, 200, .08) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 40%, transparent 78%);
  mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 40%, transparent 78%);
}
.hero-inner {
  position: relative; z-index: 2; width: 100%; max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 60px; align-items: center;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px; font-size: 13px;
  padding: 7px 15px; border-radius: 999px; color: var(--cyan);
  background: rgba(255, 255, 255, .55); border: 1px solid rgba(255, 255, 255, .75);
  box-shadow: 0 6px 18px rgba(45, 70, 120, .1);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  margin-bottom: 26px;
}
.pulse-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--green); position: relative; }
.pulse-dot::after {
  content: ""; position: absolute; inset: -4px; border-radius: 50%;
  border: 1.5px solid var(--green); animation: pulse 1.8s ease-out infinite;
}
@keyframes pulse { 0% { transform: scale(.5); opacity: 1; } 100% { transform: scale(2); opacity: 0; } }
.hero-title { font-size: clamp(38px, 6vw, 68px); font-weight: 900; letter-spacing: -.03em; line-height: 1.08; }
.hero-title .grad { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-sub { color: var(--text-dim); font-size: clamp(15px, 1.6vw, 18px); margin: 26px 0 34px; max-width: 560px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 30px; color: var(--text-faint); font-size: 13.5px; }
.hero-meta span { display: inline-flex; align-items: center; gap: 6px; transition: transform .3s var(--ease); }
.hero-meta span:hover { transform: translateY(-2px); }

.btn {
  display: inline-flex; align-items: center; gap: 9px; font-weight: 700; font-size: 15px;
  padding: 14px 22px; border-radius: 14px; transition: transform .3s var(--ease), box-shadow .3s, background .3s, color .3s, border-color .3s;
}
.btn svg { width: 18px; height: 18px; fill: currentColor; }
.btn-primary { position: relative; overflow: hidden; color: #fff; background: var(--grad); box-shadow: 0 14px 32px rgba(99, 102, 241, .38); }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 20px 44px rgba(99, 102, 241, .5); }
.btn-primary::after {
  content: ""; position: absolute; top: 0; left: -70%; width: 45%; height: 100%;
  background: linear-gradient(100deg, transparent, rgba(255, 255, 255, .5), transparent);
  transform: skewX(-20deg); pointer-events: none;
}
.btn-primary:hover::after { animation: shine .9s var(--ease); }
@keyframes shine { to { left: 130%; } }
.btn-ghost {
  color: var(--text); border: 1px solid rgba(255, 255, 255, .8);
  background: rgba(255, 255, 255, .55); box-shadow: 0 10px 26px rgba(45, 70, 120, .1);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.btn-ghost:hover { transform: translateY(-3px); border-color: var(--cyan); color: var(--cyan); }
.btn-text { padding: 14px 8px; color: var(--cyan); }
.btn-text svg { transition: transform .3s; }
.btn-text:hover svg { transform: translateX(4px); }

/* ── 06. 手机模拟器 ── */
.hero-phone { position: relative; display: flex; justify-content: center; }
.phone {
  width: min(300px, 78vw); aspect-ratio: 9/19; border-radius: 40px; position: relative; z-index: 3;
  background: linear-gradient(160deg, rgba(255, 255, 255, .72), rgba(240, 246, 255, .55));
  border: 1px solid rgba(255, 255, 255, .85);
  box-shadow: 0 44px 90px rgba(45, 70, 120, .28), inset 0 0 0 5px rgba(255, 255, 255, .35), inset 0 0 40px rgba(255, 255, 255, .35);
  backdrop-filter: blur(22px) saturate(150%);
  -webkit-backdrop-filter: blur(22px) saturate(150%);
  overflow: hidden;
  animation: floaty 7s ease-in-out infinite;
}
@keyframes floaty { 0%, 100% { transform: translateY(0) rotate(-.5deg); } 50% { transform: translateY(-16px) rotate(.5deg); } }
.phone-notch { position: absolute; top: 10px; left: 50%; transform: translateX(-50%); width: 90px; height: 20px; background: rgba(255, 255, 255, .6); border-radius: 0 0 14px 14px; z-index: 5; backdrop-filter: blur(4px); }
.phone-screen { position: absolute; inset: 0; padding: 30px 0 0; display: flex; flex-direction: column; }
.ph-statusbar { display: flex; justify-content: space-between; padding: 2px 18px; font-size: 10px; color: var(--text-dim); z-index: 2; }
.ph-map { position: relative; flex: 1; margin: 6px 10px; border-radius: 14px; overflow: hidden; background: linear-gradient(180deg, rgba(220, 235, 255, .75), rgba(235, 242, 252, .65) 60%, rgba(228, 240, 250, .7)); }
.ph-grid {
  position: absolute; inset: 0; opacity: .6;
  background-image: linear-gradient(rgba(99, 102, 241, .08) 1px, transparent 1px), linear-gradient(90deg, rgba(99, 102, 241, .08) 1px, transparent 1px);
  background-size: 22px 22px;
}
.ph-radar { position: absolute; width: 150px; height: 150px; left: 40%; top: 30%; border-radius: 50%; border: 1px solid rgba(56, 189, 248, .35); transform: translate(-50%, -50%); }
.ph-radar::before { content: ""; position: absolute; inset: 22px; border-radius: 50%; border: 1px solid rgba(56, 189, 248, .3); }
.ph-radar::after { content: ""; position: absolute; inset: 0; border-radius: 50%; background: conic-gradient(from 0deg, rgba(56, 189, 248, .35), transparent 70deg); animation: spin 3.6s linear infinite; }
.ph-radar i { position: absolute; inset: 0; border-radius: 50%; animation: spin 3.6s linear infinite; }
.ph-radar i::after { content: ""; position: absolute; top: 50%; left: 50%; width: 50%; height: 1.5px; background: linear-gradient(90deg, rgba(56, 189, 248, .9), transparent); transform-origin: left center; }
@keyframes spin { to { transform: rotate(360deg); } }
.ph-marker { position: absolute; transform: translate(-50%, -50%); display: flex; align-items: center; gap: 3px; font-size: 7px; color: #334155; white-space: nowrap; z-index: 2; background: rgba(255, 255, 255, .82); padding: 1px 5px; border-radius: 8px; box-shadow: 0 2px 6px rgba(45, 70, 120, .18); backdrop-filter: blur(4px); }
.ph-marker i { width: 7px; height: 7px; border-radius: 50%; display: inline-block; box-shadow: 0 0 6px currentColor; }
.p-online { background: var(--green); color: var(--green); animation: blink 2s infinite; }
.p-moving { background: var(--blue); color: var(--blue); animation: blink 1.6s infinite; }
.p-stopped { background: var(--amber); color: var(--amber); }
.p-fmo { background: var(--red); color: var(--red); animation: blink 1.3s infinite; }
@keyframes blink { 50% { opacity: .35; } }
.ph-self { position: absolute; left: 50%; top: 46%; width: 12px; height: 12px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0 5px rgba(14, 165, 233, .22), 0 0 16px rgba(14, 165, 233, .6); z-index: 3; animation: selfPulse 2.2s ease-in-out infinite; }
@keyframes selfPulse { 50% { box-shadow: 0 0 0 9px rgba(14, 165, 233, .1), 0 0 20px rgba(14, 165, 233, .65); } }
.ph-trail { position: absolute; left: 50%; top: 46%; width: 90px; height: 40px; border-left: 2px dashed rgba(56, 189, 248, .65); border-bottom: 2px dashed rgba(56, 189, 248, .65); border-radius: 0 0 0 40px; z-index: 1; opacity: .75; }
.ph-route { position: absolute; right: 12%; bottom: 20%; width: 60px; height: 44px; border-top: 2px dashed rgba(168, 85, 247, .6); border-right: 2px dashed rgba(168, 85, 247, .6); border-radius: 0 40px 0 0; z-index: 1; opacity: .7; }
.ph-chat { position: absolute; inset: 0; padding: 34px 12px; display: flex; flex-direction: column; gap: 6px; background: rgba(250, 252, 255, .8); backdrop-filter: blur(8px); opacity: 0; transition: opacity .5s; }
.phone:hover .ph-chat { opacity: 1; }
.ph-chat-msg { font-size: 8.5px; padding: 7px 9px; border-radius: 10px; max-width: 86%; color: #1f2a3d; }
.ph-chat-msg b { color: var(--cyan); }
.ph-chat-msg.in { background: rgba(99, 102, 241, .14); align-self: flex-start; border-bottom-left-radius: 3px; }
.ph-chat-msg.out { background: rgba(56, 189, 248, .18); align-self: flex-end; border-bottom-right-radius: 3px; }
.ph-nav { display: flex; justify-content: space-around; padding: 8px 4px 10px; background: rgba(255, 255, 255, .66); border-top: 1px solid rgba(255, 255, 255, .7); z-index: 2; backdrop-filter: blur(8px); }
.ph-nav span { display: flex; flex-direction: column; align-items: center; gap: 3px; font-size: 8px; color: var(--text-faint); position: relative; }
.ph-nav span.on { color: var(--cyan); }
.ph-nav svg { width: 16px; height: 16px; fill: currentColor; }
.ph-nav .dot { position: absolute; top: -2px; right: -6px; background: var(--red); color: #fff; font-size: 7px; border-radius: 8px; padding: 0 3px; line-height: 1.4; }
.phone-glow { position: absolute; inset: 6% 10%; z-index: 1; background: radial-gradient(60% 50% at 50% 50%, rgba(56, 189, 248, .22), transparent 70%); filter: blur(30px); }

/* ── 07. 数据统计 ── */
.stats { position: relative; z-index: 1; margin-top: -6px; padding: 34px clamp(20px, 6vw, 96px) 30px; }
.stats-inner { max-width: 1000px; margin: 0 auto; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.stat {
  text-align: center; padding: 34px 16px; border-radius: var(--radius);
  background: var(--glass); border: 1px solid var(--line);
  box-shadow: 0 16px 40px rgba(45, 70, 120, .12);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  transition: transform .35s var(--ease), box-shadow .35s, border-color .35s;
}
.stat:hover { transform: translateY(-5px); border-color: rgba(56, 189, 248, .55); box-shadow: var(--shadow-hover); }
.stat-num { font-size: clamp(30px, 3.6vw, 44px); font-weight: 900; color: var(--text); }
.stat-label { color: var(--text-dim); font-size: 14px; margin-top: 6px; }

/* ── 08. 功能卡片 ── */
.cards { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.card {
  position: relative; padding: 30px 26px; border-radius: var(--radius); overflow: hidden;
  background: var(--glass); border: 1px solid var(--line);
  box-shadow: 0 14px 38px rgba(45, 70, 120, .12);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  transition: transform .4s var(--ease), border-color .4s, box-shadow .4s;
}
.card::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(260px circle at var(--mx, 50%) var(--my, 50%), rgba(56, 189, 248, .16), transparent 65%);
  opacity: 0; transition: opacity .4s;
}
.card:hover { transform: translateY(-8px); border-color: rgba(255, 255, 255, .9); box-shadow: var(--shadow-hover); }
.card:hover::after { opacity: 1; }
.card-icon {
  width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center; margin-bottom: 18px;
  box-shadow: 0 12px 26px rgba(45, 70, 120, .2);
  transition: transform .4s var(--ease);
}
.card:hover .card-icon { transform: translateY(-3px) scale(1.06) rotate(-4deg); }
.card-icon svg { width: 26px; height: 26px; fill: #fff; }
.c1 { background: linear-gradient(135deg, #38bdf8, #0284c7); }
.c2 { background: linear-gradient(135deg, #34d399, #059669); }
.c3 { background: linear-gradient(135deg, #6366f1, #4f46e5); }
.c4 { background: linear-gradient(135deg, #a855f7, #7c3aed); }
.c5 { background: linear-gradient(135deg, #fbbf24, #d97706); }
.c6 { background: linear-gradient(135deg, #f472b6, #db2777); }
.c7 { background: linear-gradient(135deg, #38bdf8, #6366f1); }
.c8 { background: linear-gradient(135deg, #fb7185, #e11d48); }
.card h3 { font-size: 19px; font-weight: 800; margin-bottom: 10px; }
.card p { color: var(--text-dim); font-size: 14.5px; }
.card-tags { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.card-tags li { font-size: 12px; color: var(--cyan); background: rgba(255, 255, 255, .6); border: 1px solid rgba(56, 189, 248, .3); padding: 3px 10px; border-radius: 999px; }

/* ── 09. 平台下载 ── */
.platforms { max-width: 1000px; margin: 0 auto; display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.platform {
  display: flex; align-items: center; gap: 18px; padding: 24px 26px; border-radius: var(--radius);
  background: var(--glass); border: 1px solid var(--line);
  box-shadow: 0 14px 38px rgba(45, 70, 120, .12);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  transition: transform .35s var(--ease), border-color .35s, box-shadow .35s;
}
.platform:hover { transform: translateY(-5px); border-color: rgba(255, 255, 255, .9); box-shadow: var(--shadow-hover); }
.pl-logo { width: 54px; height: 54px; border-radius: 15px; display: grid; place-items: center; flex-shrink: 0; transition: transform .35s var(--ease); }
.platform:hover .pl-logo { transform: scale(1.08) rotate(-4deg); }
.pl-logo svg { width: 28px; height: 28px; fill: #fff; }
.pl-logo.a { background: linear-gradient(135deg, #34d399, #059669); }
.pl-logo.w { background: linear-gradient(135deg, #6366f1, #4f46e5); }
.pl-body { flex: 1; }
.pl-body h3 { font-size: 18px; font-weight: 800; display: flex; align-items: center; gap: 8px; }
.pl-body p { color: var(--text-dim); font-size: 13.5px; margin-top: 3px; }
.tag { font-style: normal; font-size: 11px; padding: 2px 9px; border-radius: 999px; font-weight: 700; }
.tag.ok { color: #047857; background: rgba(16, 185, 129, .14); border: 1px solid rgba(16, 185, 129, .35); }
.pl-arrow { font-size: 22px; color: var(--text-faint); transition: transform .3s, color .3s; }
.platform:hover .pl-arrow { transform: translateX(4px); color: var(--cyan); }
.dl-note {
  max-width: 720px; margin: 34px auto 0; text-align: center; color: var(--text-dim); font-size: 14px;
  display: flex; align-items: center; justify-content: center; gap: 10px;
}
.dl-note svg { width: 20px; height: 20px; fill: var(--green); }
.dl-note a { color: var(--cyan); border-bottom: 1px dashed rgba(2, 132, 199, .4); }

/* ── 10. 快速上手 ── */
.steps { max-width: 1100px; margin: 0 auto; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.step {
  position: relative; padding: 30px 26px 26px; border-radius: var(--radius); text-align: center;
  background: var(--glass); border: 1px solid var(--line);
  box-shadow: 0 14px 38px rgba(45, 70, 120, .12);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  transition: transform .35s var(--ease), border-color .35s, box-shadow .35s;
}
.step:hover { transform: translateY(-6px); border-color: rgba(255, 255, 255, .9); box-shadow: var(--shadow); }
.step-num {
  width: 46px; height: 46px; margin: 0 auto 16px; border-radius: 50%; display: grid; place-items: center;
  font-size: 20px; font-weight: 900; color: #fff; background: #2563eb;
  box-shadow: 0 12px 26px rgba(37, 99, 235, .35);
}
.step h3 { font-size: 18px; font-weight: 800; margin-bottom: 6px; }
.step p { color: var(--text-dim); font-size: 14px; }
.oobe-tip {
  max-width: 760px; margin: 40px auto 0; display: flex; gap: 16px; align-items: flex-start;
  padding: 20px 24px; border-radius: var(--radius); color: var(--text-dim); font-size: 14.5px;
  background: rgba(255, 255, 255, .5); border: 1px solid rgba(217, 119, 6, .35);
  box-shadow: 0 12px 30px rgba(45, 70, 120, .1);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}
.oobe-tip .tip-icon { font-size: 24px; line-height: 1.2; }
.oobe-tip b { color: var(--amber); }
.oobe-tip a { color: var(--cyan); border-bottom: 1px dashed rgba(2, 132, 199, .4); }
.oobe-tip u { text-decoration-color: rgba(217, 119, 6, .4); }

/* ── 11. 产品展示（信标 / 符号 / 跑马灯） ── */
.showcase-grid { max-width: 1100px; margin: 0 auto; display: grid; grid-template-columns: 1.15fr .85fr; gap: 24px; }
.beacon-box, .syms-box {
  padding: 28px; border-radius: var(--radius); background: var(--glass);
  border: 1px solid var(--line); box-shadow: 0 14px 38px rgba(45, 70, 120, .12);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
}
.beacon-title { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; font-weight: 700; font-size: 14.5px; color: var(--text-dim); }
.lang-tag { font-size: 11px; color: var(--cyan); background: rgba(255, 255, 255, .6); border: 1px solid rgba(56, 189, 248, .3); padding: 2px 10px; border-radius: 999px; }
.beacon-box pre {
  background: rgba(255, 255, 255, .6); border: 1px solid rgba(255, 255, 255, .8); border-radius: 12px; padding: 18px 16px;
  overflow-x: auto; font-size: 12.5px; line-height: 1.75; white-space: pre;
  box-shadow: inset 0 2px 8px rgba(45, 70, 120, .05);
}
.tok-c { color: #047857; } .tok-m { color: #94a3b8; } .tok-p { color: #6d28d9; }
.tok-o { color: #dc2626; } .tok-n { color: #0369a1; } .tok-s { color: #b45309; }
.beacon-notes { list-style: none; margin-top: 16px; display: grid; gap: 6px; }
.beacon-notes li { font-size: 13px; color: var(--text-dim); }
.beacon-notes code { font-size: .92em; }
.syms { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.sym {
  display: flex; flex-direction: column; align-items: center; gap: 6px; padding: 14px 6px;
  border-radius: 12px; background: rgba(255, 255, 255, .5); border: 1px solid rgba(255, 255, 255, .75);
  box-shadow: 0 6px 16px rgba(45, 70, 120, .06);
  transition: transform .3s, border-color .3s, background .3s;
}
.sym:hover { transform: translateY(-4px); border-color: rgba(56, 189, 248, .6); background: rgba(255, 255, 255, .75); }
.sym-char {
  width: 40px; height: 40px; border-radius: 10px; display: grid; place-items: center;
  font-family: ui-monospace, Consolas, monospace; font-size: 20px; font-weight: 800;
  color: #fff; background: var(--grad);
  box-shadow: 0 8px 18px rgba(99, 102, 241, .3);
}
.sym b { font-size: 12px; color: var(--text-dim); font-weight: 600; }
.syms-note { text-align: center; color: var(--text-faint); font-size: 13px; margin-top: 18px; }
.marquee {
  max-width: 1100px; margin: 46px auto 0; overflow: hidden; border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, .75); background: rgba(255, 255, 255, .5);
  box-shadow: 0 12px 30px rgba(45, 70, 120, .1);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}
.marquee-track { display: flex; gap: 34px; padding: 13px 0; white-space: nowrap; animation: marquee 22s linear infinite; width: max-content; }
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee-track span { color: var(--text-faint); font-family: ui-monospace, Consolas, monospace; font-size: 13px; letter-spacing: .08em; }
.marquee-track span::before { content: "◆"; color: var(--cyan); margin-right: 10px; font-size: 9px; vertical-align: 1px; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ── 12. FAQ ── */
.faq-list { max-width: 820px; margin: 0 auto; display: grid; gap: 14px; }
.faq {
  border-radius: var(--radius); background: var(--glass); border: 1px solid var(--line);
  box-shadow: 0 14px 38px rgba(45, 70, 120, .1);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  overflow: hidden; transition: border-color .3s, box-shadow .3s;
}
.faq[open] { border-color: rgba(56, 189, 248, .55); box-shadow: var(--shadow); }
.faq summary {
  cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between;
  padding: 20px 24px; font-weight: 700; font-size: 15.5px; user-select: none; transition: color .25s;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary:hover { color: var(--cyan); }
.faq .chev { position: relative; width: 18px; height: 18px; flex-shrink: 0; }
.faq .chev::before, .faq .chev::after { content: ""; position: absolute; background: var(--text-faint); border-radius: 2px; transition: background .25s, transform .35s var(--ease); }
.faq .chev::before { width: 14px; height: 2px; top: 8px; left: 2px; }
.faq .chev::after { width: 2px; height: 14px; top: 2px; left: 8px; }
.faq[open] .chev::after { transform: scaleY(0); }
.faq summary:hover .chev::before, .faq summary:hover .chev::after { background: var(--cyan); }
.faq > p { padding: 0 24px 22px; color: var(--text-dim); font-size: 14.5px; animation: fadeDown .4s var(--ease); }
@keyframes fadeDown { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: none; } }

/* ── 13. 社区 ── */
.community-inner { max-width: 1100px; margin: 0 auto; }
.community-links { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.clink {
  display: flex; align-items: center; gap: 16px; padding: 22px 24px; border-radius: var(--radius);
  background: var(--glass); border: 1px solid var(--line);
  box-shadow: 0 14px 38px rgba(45, 70, 120, .12);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  transition: transform .35s var(--ease), border-color .35s, box-shadow .35s;
}
.clink:hover { transform: translateY(-5px); border-color: rgba(255, 255, 255, .9); box-shadow: var(--shadow-hover); }
.cl-icon { width: 48px; height: 48px; border-radius: 13px; display: grid; place-items: center; flex-shrink: 0; box-shadow: 0 10px 22px rgba(45, 70, 120, .18); transition: transform .35s var(--ease); }
.clink:hover .cl-icon { transform: scale(1.08) rotate(-4deg); }
.cl-icon svg { width: 24px; height: 24px; fill: #fff; }
.cl-icon.gh { background: linear-gradient(135deg, #475569, #1e293b); }
.cl-icon.gc { background: linear-gradient(135deg, #38bdf8, #0284c7); }
.cl-icon.qq { background: linear-gradient(135deg, #38bdf8, #6366f1); }
.cl-icon.web2 { background: linear-gradient(135deg, #a855f7, #7c3aed); }
.clink div { flex: 1; }
.clink b { display: block; font-size: 16px; }
.clink div span { color: var(--text-faint); font-size: 12.5px; word-break: break-all; }
.cl-arrow { color: var(--text-faint); font-size: 20px; transition: transform .3s, color .3s; }
.clink:hover .cl-arrow { transform: translate(3px, -3px); color: var(--cyan); }

/* ── 14. 页脚 ── */
.footer { border-top: 1px solid rgba(255, 255, 255, .6); padding: 50px clamp(20px, 6vw, 96px) 34px; position: relative; z-index: 1; background: rgba(255, 255, 255, .35); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); }
.footer-inner { max-width: 1200px; margin: 0 auto; }
.footer-top { display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap; padding-bottom: 28px; border-bottom: 1px solid rgba(255, 255, 255, .7); }
.footer-brand { display: flex; align-items: center; gap: 14px; }
.footer-brand img { width: 44px; height: 44px; border-radius: 13px; object-fit: cover; box-shadow: 0 8px 20px rgba(56, 189, 248, .35); }
.footer-brand b { display: block; font-size: 18px; }
.footer-brand span { color: var(--text-faint); font-size: 13px; }
.footer-links { display: flex; gap: 6px; flex-wrap: wrap; }
.footer-links a { color: var(--text-dim); font-size: 14px; padding: 8px 12px; border-radius: 8px; transition: color .25s, background .25s; }
.footer-links a:hover { color: var(--cyan); background: rgba(255, 255, 255, .55); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; gap: 14px; flex-wrap: wrap; padding-top: 24px; color: var(--text-faint); font-size: 13px; }
.footer-bottom a { color: var(--cyan); }
.footer-links a, .footer-bottom a {
  background-image: linear-gradient(currentColor, currentColor);
  background-size: 0% 1.5px; background-repeat: no-repeat; background-position: 0 100%;
  transition: background-size .3s var(--ease), color .25s, background-color .25s;
}
.footer-links a:hover, .footer-bottom a:hover { background-size: 100% 1.5px; }
.disclaimer { opacity: .85; }

/* ── 15. 悬浮工具（进度条 / 回到顶部 / Toast） ── */
.scroll-progress {
  position: fixed; top: 0; left: 0; right: 0; height: 3px; z-index: 300;
  background: var(--grad); transform-origin: 0 50%; transform: scaleX(0);
  box-shadow: 0 0 12px rgba(56, 189, 248, .55);
  pointer-events: none;
}
.backtop {
  position: fixed; right: 26px; bottom: 26px; z-index: 90; width: 48px; height: 48px; border-radius: 14px;
  display: grid; place-items: center; background: rgba(255, 255, 255, .65); border: 1px solid rgba(255, 255, 255, .85);
  box-shadow: 0 12px 30px rgba(45, 70, 120, .2);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  opacity: 0; pointer-events: none; transform: translateY(14px);
  transition: opacity .35s, transform .35s var(--ease), border-color .3s;
}
.backtop.show { opacity: 1; pointer-events: auto; transform: none; }
.backtop:hover { border-color: var(--cyan); }
.backtop svg { width: 20px; height: 20px; fill: var(--cyan); }
.backtop-ring { position: absolute; inset: 0; width: 100%; height: 100%; }
.ring-bg { fill: none; stroke: rgba(15, 40, 80, .14); stroke-width: 2.5; }
.ring-fg {
  fill: none; stroke: var(--cyan); stroke-width: 2.5; stroke-linecap: round;
  transform: rotate(-90deg); transform-origin: 50% 50%;
  stroke-dasharray: 106.8; stroke-dashoffset: 106.8;
  transition: stroke-dashoffset .12s linear;
}
.backtop-arrow { position: absolute; width: 19px; height: 19px; fill: var(--cyan); }
.toast {
  position: fixed; left: 50%; bottom: 34px; transform: translate(-50%, 18px); z-index: 300;
  display: flex; align-items: center; gap: 8px;
  padding: 11px 20px; border-radius: 12px; font-size: 14px; color: #fff;
  background: rgba(15, 23, 42, .82); box-shadow: 0 16px 40px rgba(15, 23, 42, .4);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  opacity: 0; pointer-events: none; transition: opacity .35s, transform .35s var(--ease);
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }
.toast::before { content: "✓"; color: var(--green); font-weight: 800; }
.toast svg { width: 15px; height: 15px; fill: var(--green); }

/* ── 16. 细节交互（复制按钮 / 焦点 / 显现动画） ── */
.beacon-code { position: relative; }
.copy-btn {
  position: absolute; top: 10px; right: 10px; width: 34px; height: 34px; border-radius: 9px;
  display: grid; place-items: center; cursor: pointer; border: 1px solid rgba(255, 255, 255, .85);
  background: rgba(255, 255, 255, .65); color: var(--text-dim);
  box-shadow: 0 6px 16px rgba(45, 70, 120, .1);
  transition: color .25s, border-color .25s, transform .25s, background .25s, box-shadow .25s;
}
.copy-btn svg { width: 15px; height: 15px; fill: currentColor; }
.copy-btn:hover { color: var(--cyan); border-color: var(--cyan); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(56, 189, 248, .3); }
.copy-btn.copied { color: var(--green); border-color: var(--green); }
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 2px solid var(--cyan); outline-offset: 3px; border-radius: 8px;
}
.reveal { opacity: 0; transform: translateY(34px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: .08s; }
.reveal.d2 { transition-delay: .16s; }
.reveal.d3 { transition-delay: .24s; }

/* ── 17. 响应式与动效偏好 ── */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 56px; }
  .hero-phone { order: -1; }
  .phone { width: 240px; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .platforms, .community-links { grid-template-columns: 1fr; }
  .showcase-grid { grid-template-columns: 1fr; }
  .stats-inner { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .section { padding: 80px 22px; }
  .nav-links {
    position: fixed; top: 0; right: 0; bottom: 0; width: min(300px, 80vw);
    flex-direction: column; align-items: stretch; justify-content: flex-start; gap: 4px;
    padding: 90px 24px 30px; background: rgba(255, 255, 255, .72); border-left: 1px solid rgba(255, 255, 255, .8);
    backdrop-filter: blur(24px) saturate(160%);
    -webkit-backdrop-filter: blur(24px) saturate(160%);
    box-shadow: -20px 0 60px rgba(45, 70, 120, .18);
    transform: translateX(100%); transition: transform .4s var(--ease);
  }
  .nav-links.open { transform: none; }
  .nav-links a { padding: 14px 16px; font-size: 16px; }
  .nav-links .nav-cta { margin: 16px 0 0; text-align: center; }
  .nav-burger { display: flex; z-index: 110; }
  .cards { grid-template-columns: 1fr; }
  .stats-inner { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; }
  .syms { grid-template-columns: repeat(3, 1fr); }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* ════════════════════════════════════════════════════════════════
   18. 进入动画 · 启动遮罩 + Hero 入场 + 溢出防护
   ════════════════════════════════════════════════════════════════ */

/* 全局横向溢出防护（移动端抽屉 / 全屏光斑不会撑出滚动条） */
html { overflow-x: hidden; }

/* 启动遮罩 */
.preloader {
  position: fixed; inset: 0; z-index: 400;
  display: grid; place-items: center;
  background:
    radial-gradient(900px 600px at 50% 30%, rgba(56, 189, 248, .18), transparent 60%),
    radial-gradient(700px 500px at 80% 90%, rgba(168, 85, 247, .12), transparent 60%),
    linear-gradient(180deg, #f3f6fd 0%, #eaf0fb 100%);
  transition: opacity .7s var(--ease), visibility .7s;
}
.preloader.hide { opacity: 0; visibility: hidden; pointer-events: none; }
.pre-inner { text-align: center; }
.pre-radar {
  position: relative; width: 96px; height: 96px; margin: 0 auto 18px; border-radius: 50%;
  display: grid; place-items: center;
  border: 1px solid rgba(56, 189, 248, .4);
  animation: prePulse 2.4s ease-in-out infinite;
}
.pre-radar::before { content: ""; position: absolute; inset: 20px; border-radius: 50%; border: 1px solid rgba(56, 189, 248, .35); }
.pre-radar::after { content: ""; position: absolute; inset: 0; border-radius: 50%; background: conic-gradient(from 0deg, rgba(56, 189, 248, .5), transparent 70deg); animation: spin 1.6s linear infinite; }
.pre-radar i { position: absolute; inset: 0; border-radius: 50%; animation: spin 1.6s linear infinite; }
.pre-radar i::after { content: ""; position: absolute; top: 50%; left: 50%; width: 50%; height: 2px; background: linear-gradient(90deg, rgba(56, 189, 248, .9), transparent); transform-origin: left center; }
.pre-logo { position: relative; z-index: 2; width: 34px; height: 34px; border-radius: 10px; object-fit: cover; box-shadow: 0 8px 22px rgba(56, 189, 248, .4); }
.pre-brand { font-weight: 800; font-size: 20px; letter-spacing: .06em; color: var(--text); }
.pre-bar { width: 170px; height: 3px; margin: 16px auto 0; border-radius: 3px; background: rgba(15, 40, 80, .1); overflow: hidden; }
.pre-bar i { display: block; height: 100%; width: 38%; border-radius: 3px; background: var(--grad); animation: preBar 1.2s ease-in-out infinite; }
@keyframes prePulse { 50% { transform: scale(1.05); } }
@keyframes preBar { 0% { transform: translateX(-120%); } 100% { transform: translateX(420%); } }

/* Hero 入场：遮罩淡出时内容依次浮现 */
.hero-copy > *, .hero-phone {
  opacity: 0; transform: translateY(28px);
  transition: opacity .8s var(--ease), transform .8s var(--ease);
}
.hero-copy > *:nth-child(1) { transition-delay: .06s; }
.hero-copy > *:nth-child(2) { transition-delay: .14s; }
.hero-copy > *:nth-child(3) { transition-delay: .22s; }
.hero-copy > *:nth-child(4) { transition-delay: .30s; }
.hero-copy > *:nth-child(5) { transition-delay: .38s; }
.hero-phone { transform: translateY(28px) scale(.95); transition-delay: .26s; }
body.loaded .hero-copy > *, body.loaded .hero-phone { opacity: 1; transform: none; }

/* 移动端：导航抽屉收起时隐藏，避免脱离屏幕造成横向滚动 */
@media (max-width: 720px) {
  .nav-links { visibility: hidden; }
  .nav-links.open { visibility: visible; }
}

/* 动效偏好：跳过入场动画 */
@media (prefers-reduced-motion: reduce) {
  .preloader { display: none; }
  .hero-copy > *, .hero-phone { opacity: 1; transform: none; }
}