/* ============================================================
   言聊 YanLiao — Design System / Base  (v2 · 霓虹故障风)
   深蓝黑底 · 霓虹粉 + 青色 · 色差质感 · 干净黑体
   ============================================================ */

:root {
  /* --- surfaces (deep navy-black) --- */
  --bg:        #080b18;
  --bg-1:      #0b0f20;
  --bg-2:      #0f1428;
  --surface:   #141a33;
  --surface-2: #1a2240;

  /* --- ink (cool white) --- */
  --ink:       #f3f5fc;
  --ink-soft:  #c2c9e0;
  --muted:     #828bab;
  --faint:     #565f80;

  /* --- hairlines --- */
  --line:      rgba(180,200,255,0.13);
  --line-2:    rgba(180,200,255,0.06);

  /* --- neon palette --- */
  --pink:        #ff3d7f;
  --pink-bright: #ff77a6;
  --cyan:        #36d3f5;
  --cyan-bright: #84e6fb;
  --purple:      #9d6bff;
  --green:        #15e08a;
  --green-bright: #5ff2b0;

  /* legacy var names remapped → neon (so section CSS inherits) */
  --gold:        var(--pink);
  --gold-bright: var(--pink-bright);
  --rose:        var(--cyan);
  --jade:        var(--purple);

  /* switchable accent (driven by [data-accent]) */
  --accent:        var(--pink);
  --accent-bright: var(--pink-bright);
  --accent-2:      var(--cyan);
  --glow-a: rgba(255,61,127,0.40);
  --glow-b: rgba(54,211,245,0.34);

  /* --- type (clean, free, modern) --- */
  --font-display: "Noto Sans SC", "PingFang SC", sans-serif;
  --font-sans: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-latin: "Poppins", var(--font-sans);

  /* --- layout --- */
  --maxw: 1240px;
  --gutter: clamp(20px, 5vw, 64px);
  --radius: 18px;
  --radius-lg: 28px;

  --ease: cubic-bezier(.22,.61,.36,1);
  --ease-out: cubic-bezier(.16,1,.3,1);
}

[data-accent="cyan"] {
  --accent: var(--cyan);
  --accent-bright: var(--cyan-bright);
  --accent-2: var(--purple);
  /* legacy gold/jade remap → cyan：消除安全板块图标、语音房麦克风、资讯页筛选/分页等残留粉色 */
  --gold: var(--cyan);
  --gold-bright: var(--cyan-bright);
  --jade: var(--cyan);
  --glow-a: rgba(54,211,245,0.40);
  --glow-b: rgba(54,211,245,0.22);
}
/* cyan 版：Hero 大标题渐变走纯青（亮青→青→深青） */
[data-accent="cyan"] .text-grad {
  background: linear-gradient(100deg, var(--cyan-bright), var(--cyan) 55%, #19b8e0 95%);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}
[data-accent="purple"] {
  --accent: var(--purple);
  --accent-bright: #bb9aff;
  --accent-2: var(--cyan);
  --glow-a: rgba(157,107,255,0.36);
  --glow-b: rgba(54,211,245,0.30);
}
[data-accent="green"] {
  --accent: var(--green);
  --accent-bright: var(--green-bright);
  --accent-2: var(--cyan);
  /* legacy gold/jade remap → green，让安全板块图标、语音房麦克风、资讯页筛选/分页等也变绿 */
  --gold: var(--green);
  --gold-bright: var(--green-bright);
  --jade: var(--green);
  --glow-a: rgba(21,224,138,0.40);
  --glow-b: rgba(54,211,245,0.30);
}
/* green 版：Hero 大标题渐变同步走翠绿→青 */
[data-accent="green"] .text-grad {
  background: linear-gradient(100deg, var(--green-bright), var(--green) 42%, var(--cyan) 92%);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}

/* ---------------- reset ---------------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  font-weight: 400;
  letter-spacing: 0.005em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; background: none; border: none; }
::selection { background: var(--pink); color: #fff; }

/* ---------------- typography ---------------- */
.serif, .latin { font-family: var(--font-latin); }

h1, h2, h3 { font-weight: 800; line-height: 1.12; letter-spacing: -0.01em; }

/* chromatic-aberration (logo-style) headline */
.ca {
  color: #fff;
  text-shadow: -0.022em 0 0 rgba(54,211,245,0.9), 0.022em 0 0 rgba(255,61,127,0.9);
}
.ca-soft {
  text-shadow: -0.016em 0 0 rgba(54,211,245,0.75), 0.016em 0 0 rgba(255,61,127,0.75);
}

.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 13px; font-weight: 600; letter-spacing: 0.26em;
  text-transform: uppercase; color: var(--accent);
  font-family: var(--font-sans);
}
.eyebrow::before {
  content: ""; width: 26px; height: 2px; border-radius: 2px;
  background: linear-gradient(90deg, transparent, var(--accent));
}
.eyebrow.center::after {
  content: ""; width: 26px; height: 2px; border-radius: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(30px, 4.4vw, 56px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.02em;
  text-wrap: balance;
}
.section-lead {
  color: var(--ink-soft);
  font-size: clamp(15px, 1.4vw, 18px);
  max-width: 56ch;
  font-weight: 400;
}

.text-grad {
  background: linear-gradient(100deg, var(--cyan-bright), var(--cyan) 35%, var(--pink) 75%, var(--pink-bright));
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}

/* ---------------- layout ---------------- */
.wrap { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }
section { position: relative; }
.section-pad { padding-block: clamp(54px, 7vw, 100px); }
.divider { height: 1px; background: var(--line-2); border: 0; }

/* ---------------- buttons ---------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 14px 26px; border-radius: 100px;
  font-family: var(--font-sans); font-size: 15px; font-weight: 600;
  letter-spacing: 0.01em; white-space: nowrap;
  transition: transform .35s var(--ease-out), box-shadow .35s var(--ease), background .3s, color .3s, border-color .3s;
  will-change: transform;
}
.btn:active { transform: translateY(1px) scale(.99); }

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-bright));
  box-shadow: 0 1px 0 rgba(255,255,255,.3) inset, 0 12px 34px -8px var(--glow-a);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 1px 0 rgba(255,255,255,.4) inset, 0 20px 50px -10px var(--glow-a); }

.btn-ghost {
  color: var(--ink); border: 1px solid var(--line);
  background: rgba(255,255,255,0.02);
  backdrop-filter: blur(6px);
}
.btn-ghost:hover { border-color: color-mix(in oklab, var(--cyan) 70%, var(--line)); background: rgba(54,211,245,0.06); transform: translateY(-2px); }

.btn-lg { padding: 17px 32px; font-size: 16px; }

/* store badges */
.store-badge {
  display: inline-flex; align-items: center; gap: 12px;
  padding: 11px 20px 11px 18px; border-radius: 14px;
  border: 1px solid var(--line); background: rgba(255,255,255,0.03);
  transition: transform .35s var(--ease-out), border-color .3s, background .3s;
}
.store-badge:hover { transform: translateY(-2px); border-color: color-mix(in oklab, var(--pink) 55%, var(--line)); background: rgba(255,61,127,0.06); }
.store-badge .ico { width: 26px; height: 26px; color: var(--ink); flex: none; }
.store-badge > span { display: flex; flex-direction: column; }
.store-badge .l1 { font-size: 11px; color: var(--muted); letter-spacing: .04em; line-height: 1; }
.store-badge .l2 { font-size: 16px; font-weight: 600; line-height: 1.2; margin-top: 3px; white-space: nowrap; }

/* ---------------- chips / pills ---------------- */
.pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 15px; border-radius: 100px;
  border: 1px solid var(--line); background: rgba(255,255,255,0.025);
  font-size: 13px; color: var(--ink-soft); letter-spacing: .02em;
}
.pill .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px color-mix(in oklab, var(--accent) 22%, transparent); }
.dot-live { animation: pulse 2.4s var(--ease) infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .35; } }

/* ---------------- cards ---------------- */
.card {
  position: relative;
  background: linear-gradient(180deg, var(--surface), var(--bg-1));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.card-soft { background: rgba(255,255,255,0.02); border: 1px solid var(--line-2); border-radius: var(--radius); }

/* ---------------- ambient glow blobs ---------------- */
.glow { position: absolute; border-radius: 50%; pointer-events: none; filter: blur(70px); opacity: .55; z-index: 0; }

/* ---------------- reveal-on-scroll ---------------- */
/* 默认可见：无 JS / 搜索引擎 / AI 抓取都能读到内容（不踩"遮挡阻断"） */
[data-reveal] { opacity: 1; }
/* 仅在支持 JS 的浏览器里启用入场动画（html.js 由内联脚本同步添加） */
.js [data-reveal] { opacity: 0; transform: translateY(26px); }
@media (prefers-reduced-motion: reduce) {
  .js [data-reveal] { opacity: 1 !important; transform: none !important; }
}
.js .is-in[data-reveal] {
  opacity: 1; transform: none;
  transition: opacity .9s var(--ease-out), transform .9s var(--ease-out);
  transition-delay: var(--d, 0ms);
}

/* motion off */
.no-motion *, .no-motion *::before, .no-motion *::after { animation: none !important; transition-duration: .001ms !important; }
.no-motion [data-reveal] { opacity: 1 !important; transform: none !important; }

/* utility */
/* 视觉隐藏但爬虫/读屏可读（h1 品牌词等短文本），非堆砌 */
.sr-only { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.center { text-align: center; }
.mx-auto { margin-inline: auto; }
.dim { color: var(--muted); }
.nowrap { white-space: nowrap; }