/* PUBLIC_STYLE_VERSION_20260407_V2 */
/* ==========================================================================
   SoulLink Website — Global Styles
   File: assets/css/style.css
   Notes:
   - 兼容 index.html 中的内联 Critical CSS（变量可重复定义）
   - 支持暗黑模式、无障碍焦点、响应式
   ========================================================================== */

/* ----------------------- CSS Variables ----------------------- */
:root{
  --bg:#ffffff; --fg:#0e0e10; --muted:#6b6b6b; --link:#6e60ff; --border:#e6e6eb;
  --maxw:1200px; --radius:14px; --radius-lg:22px; --shadow:0 10px 30px rgba(0,0,0,.06);
  --grad1:#7c4dff; --grad2:#ff6ec7; --grad3:#35c6ff;
  --hero-h1:56px; --h2:32px; --h3:20px; --body:16px; --small:14px;
  --focus:#5b8cff; /* 焦点可视化 */
}

@media (prefers-color-scheme: dark){
  :root{
    --bg:#0b0c10; --fg:#f5f5f7; --muted:#b3b3bb; --link:#a98fff; --border:#23252b;
    --shadow:0 14px 36px rgba(0,0,0,.35);
    --grad1:#6d5ae6; --grad2:#e06eff; --grad3:#35b0ff;
    --focus:#8ab4ff;
  }
}

/* ----------------------- Base Reset ----------------------- */
*{box-sizing:border-box}
html{scroll-behavior:smooth;text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--fg);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial;
  line-height:1.7;font-size:var(--body);-webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--link);text-decoration:none}
a:hover{text-decoration:underline}
:focus-visible{outline:2px dashed var(--focus);outline-offset:2px}

.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.muted{color:var(--muted)} .small{font-size:var(--small)} .nowrap{white-space:nowrap}

/* ----------------------- Topbar / Nav ----------------------- */
.topbar{
  position:sticky;top:0;z-index:120;backdrop-filter:blur(12px);
  background:color-mix(in srgb, var(--bg) 86%, transparent);
  border-bottom:1px solid var(--border);
  box-shadow:0 6px 20px rgba(0,0,0,.04);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px}
.brand a{font-weight:900;letter-spacing:.2px;color:var(--fg);font-size:18px}
.nav ul{list-style:none;display:flex;gap:22px;margin:0;padding:0}
.nav a.link{color:var(--fg);font-weight:600}
.right{display:flex;gap:14px;align-items:center}
.lang{font-size:var(--small);color:var(--muted)}

/* Buttons */
.btn{display:inline-block;padding:12px 16px;border-radius:12px;font-weight:700;line-height:1}
.btn-primary{background:var(--fg);color:var(--bg)}
.btn-ghost{border:1px solid var(--border);color:var(--fg);background:transparent}
.btn-light{background:#fff;color:#111;border:2px solid #fff}
.btn-outline{border:2px solid #fff;color:#fff;background:transparent}
.btn:active{transform:translateY(1px)}

/* ----------------------- HERO（单图主视觉） ----------------------- */
.hero{
  position:relative;overflow:hidden;border-bottom:1px solid var(--border);
  isolation:isolate;text-align:center;
}
.hero .inner{padding:112px 0 0;position:relative;z-index:1}
.hero h1{
  font-size:var(--hero-h1);letter-spacing:-.025em;margin:0 0 10px;font-weight:900;
}
.hero p{
  max-width:820px;margin:0 auto 18px;font-size:18px;
  color:color-mix(in srgb, var(--fg) 86%, transparent);
}
.cta-row{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-bottom:24px}

/* Glow 背景图 */
.hero-bg{position:absolute;inset:0;z-index:-2}
.hero-bg img{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
  filter:saturate(110%) contrast(102%);
}

/* 人物主视觉卡片（取代原 mock/human 组合） */
.hero-visual{position:relative;display:flex;justify-content:center;margin:28px 0 18px}
.hero-card{
  position:relative;border-radius:24px;overflow:hidden;
  width:min(860px,86vw);
  box-shadow:0 28px 80px rgba(0,0,0,.35), inset 0 0 0 1px color-mix(in srgb,var(--border) 70%, transparent);
  backdrop-filter:saturate(120%) blur(2px);
}
.hero-card::after{
  content:"";position:absolute;inset:-1px;border-radius:26px;
  box-shadow:inset 0 0 60px rgba(0,0,0,.25), inset 0 0 1px rgba(255,255,255,.5);pointer-events:none;
}
.hero-card img{display:block;width:100%;height:auto}

/* ----------------------- Press/Stats Strip ----------------------- */
.strip{
  border-top:1px solid color-mix(in srgb,var(--bg) 70%,transparent);
  border-bottom:1px solid var(--border);
  background:color-mix(in srgb, var(--bg) 88%, transparent);
}
.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;padding:18px 0;text-align:center}
.metric h4{margin:0;font-size:22px;font-weight:900}
.metric p{margin:2px 0 0;color:var(--muted)}
.logos{display:flex;gap:18px;justify-content:center;flex-wrap:wrap;padding:10px 0 28px}
.logos img{opacity:.75;transition:opacity .2s ease}
.logos img:hover{opacity:1}

/* ----------------------- Sections ----------------------- */
section{padding:76px 0}
h2.section-title{font-size:var(--h2);letter-spacing:-.01em;margin:0 0 10px;text-align:center}
p.lead{text-align:center;margin:0 auto 24px;max-width:820px;color:var(--muted)}

/* Steps (How it works) */
.steps{display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.step{border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px;background:linear-gradient(180deg, color-mix(in srgb, var(--bg) 92%, transparent), transparent);box-shadow:var(--shadow)}
.step .num{display:inline-block;font-weight:900;border:1px solid var(--border);border-radius:999px;padding:4px 10px;margin-bottom:8px;color:var(--muted);font-size:var(--small)}
.step h3{margin:0 0 6px;font-size:var(--h3)}
.step .media{border-radius:14px;overflow:hidden;margin-top:12px;border:1px solid var(--border)}
.step .media img{display:block;width:100%;height:auto}

/* Feature Grid */
.grid{display:grid;gap:18px;grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}
.card{border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px;background:linear-gradient(180deg, color-mix(in srgb, var(--bg) 92%, transparent), transparent);box-shadow:var(--shadow)}
.card h3{margin:4px 0 10px;font-size:var(--h3)}
.card .media{border-radius:14px;overflow:hidden;margin-bottom:12px;border:1px solid var(--border)}
.card .media img{display:block;width:100%;height:auto}

/* Chat Preview */
.chat{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}
.bubble{border:1px solid var(--border);border-radius:16px;padding:14px;background:var(--bg);box-shadow:var(--shadow)}
.bubble .who{font-weight:800;margin-bottom:4px}
.bubble.user{border-left:4px solid color-mix(in srgb, var(--grad2) 50%, transparent)}
.bubble.ai{border-left:4px solid color-mix(in srgb, var(--grad1) 50%, transparent)}

/* Trust Badges */
.badges{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:10px}
.badge{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--border);padding:6px 12px;border-radius:999px;font-size:14px;color:var(--muted);background:linear-gradient(180deg, color-mix(in srgb, var(--bg) 92%, transparent), transparent)}

/* Testimonials */
.quotes{display:grid;gap:22px;grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}
blockquote{border-left:4px solid var(--link);padding-left:14px;margin:0;font-style:italic}
.sig{margin-top:6px;color:var(--muted);font-size:var(--small)}

/* FAQ */
.faq{max-width:900px;margin:0 auto}
details{border:1px solid var(--border);border-radius:12px;padding:14px 16px;margin-bottom:12px;background:linear-gradient(180deg, color-mix(in srgb, var(--bg) 96%, transparent), transparent)}
summary{cursor:pointer;font-weight:700;list-style:none}
details[open]{box-shadow:var(--shadow)}

/* CTA Panel */
.cta-panel{border:1px solid var(--border);border-radius:22px;padding:28px;text-align:center;box-shadow:var(--shadow)}
.cta-panel h3{margin:0 0 8px;font-size:26px}
.cta-row-2{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:10px}

/* Footer */
footer{border-top:1px solid var(--border);padding:40px 0;color:var(--muted);font-size:14px}
.foot-grid{display:grid;gap:18px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.foot-col h4{margin:0 0 10px;font-size:16px;color:var(--fg)}
.foot-col a{color:var(--muted)}
.foot-bottom{margin-top:18px;text-align:center}

/* ----------------------- Utilities ----------------------- */
.hide{display:none !important}
.center{text-align:center}
.mt-0{margin-top:0}.mt-8{margin-top:8px}.mt-16{margin-top:16px}.mt-24{margin-top:24px}
.mb-0{margin-bottom:0}.mb-8{margin-bottom:8px}.mb-16{margin-bottom:16px}.mb-24{margin-bottom:24px}

/* ----------------------- Responsive ----------------------- */
@media (max-width:1120px){
  :root{ --hero-h1:48px }
}
@media (max-width:1024px){
  .hero-card{width:min(720px,90vw);border-radius:20px}
  .hero-card::after{border-radius:22px}
}
@media (max-width:860px){
  :root{ --hero-h1:42px }
}
@media (max-width:768px){
  .nav ul{display:none}
  .hero .inner{padding:96px 0 0}
  .metrics{grid-template-columns:1fr}
}
@media (max-width:480px){
  :root{ --hero-h1:34px }
  .hero .inner{padding:88px 0 0}
  .cta-row{margin-bottom:18px}
  .hero-card{width:92vw;border-radius:18px}
  .hero-card::after{border-radius:20px}
}

/* ----------------------- Print ----------------------- */
@media print{
  .topbar,.cta-row,.logos,.strip{display:none !important}
  a{color:#000;text-decoration:underline}
}

/* TRY_ALLOW_BUTTON_RAINBOW_V6 */
@keyframes allowBtnRainbowShift{
  0%{background-position:0% 50%}
  100%{background-position:100% 50%}
}
#allow.btn,
#allow_btn.btn{
  background:linear-gradient(120deg,#ff4d8d 0%,#ff8a3d 16%,#f6d64a 32%,#4fe08a 48%,#42b8ff 64%,#7a7dff 80%,#c15dff 100%) !important;
  background-size:300% 300% !important;
  animation:allowBtnRainbowShift 8s ease infinite !important;
  color:#fdfdff !important;
  border:1px solid rgba(255,255,255,.55) !important;
  box-shadow:0 18px 40px rgba(20,26,44,.45),inset 0 1px 0 rgba(255,255,255,.28),0 0 0 1px rgba(255,255,255,.16) !important;
  text-shadow:0 1px 2px rgba(8,10,18,.42) !important;
}
#allow.btn:hover,
#allow_btn.btn:hover{
  filter:brightness(1.06) saturate(1.08);
  border-color:rgba(255,255,255,.82) !important;
  color:#fff !important;
}
#allow.btn:active,
#allow_btn.btn:active{
  filter:brightness(.92);
  border-color:rgba(255,255,255,.92) !important;
  color:#fff !important;
}
#allow.btn:disabled,
#allow_btn.btn:disabled{
  background:#FCA5A5 !important;
  background-image:none !important;
  color:#7F1D1D !important;
  border-color:#F87171 !important;
  opacity:1 !important;
  cursor:pointer !important;
}