/* liangnu.com — 亮ⁿU 官方品牌站 v1 (2026-11-09) */

:root{
  --ink:#22201b;
  --ink-soft:#5c574c;
  --paper:#faf8f3;
  --paper-alt:#f3efe6;
  --gold:#b8892f;
  --gold-deep:#96702a;
  --gold-soft:#e8d9b8;
  --line:#e4ddcd;
  --dark:#161511;
  --dark-2:#201d17;
  --header-h:72px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"MiSans","PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans CJK SC","Source Han Sans SC","WenQuanYi Zen Hei",sans-serif;
  color:var(--ink);
  background:var(--paper);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}

/* ---------- 顶栏：桌面一行（品牌左 / 菜单右 / 主按钮收尾） ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(250,248,243,.86);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:border-color .25s, background .25s;
}
.site-header.scrolled{border-bottom-color:var(--line);background:rgba(250,248,243,.96)}
.header-inner{
  max-width:1200px;margin:0 auto;
  padding:10px 24px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{width:42px;height:42px;border-radius:50%}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-name{font-weight:700;font-size:19px;letter-spacing:.5px}
.brand-name sup{font-size:11px;font-weight:600}
.brand-domain{font-family:Georgia,"Times New Roman",serif;font-size:11.5px;color:var(--gold-deep);letter-spacing:.6px}

.site-nav{display:flex;align-items:center;flex-wrap:wrap;justify-content:flex-end;gap:6px;margin-left:auto}
.nav-item{
  font-size:14.5px;color:var(--ink-soft);
  padding:7px 15px;border-radius:999px;
  background:rgba(184,137,47,.07);
  border:1px solid transparent;
  transition:all .2s;
  text-align:center;
  white-space:nowrap;
}
.nav-item:hover{color:var(--gold-deep);background:rgba(184,137,47,.14)}
.nav-item.active{color:var(--gold-deep);background:rgba(184,137,47,.14);border-color:var(--gold-soft)}
.nav-cta{
  font-size:14.5px;font-weight:600;color:#fff;
  background:linear-gradient(135deg,var(--gold),var(--gold-deep));
  padding:8px 20px;border-radius:999px;
  box-shadow:0 2px 10px rgba(150,112,42,.28);
  transition:transform .2s, box-shadow .2s;
  white-space:nowrap;
}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 4px 14px rgba(150,112,42,.4)}

/* ---------- HERO ---------- */
.hero{
  min-height:100vh;
  display:flex;align-items:center;justify-content:center;
  padding:calc(var(--header-h) + 40px) 24px 70px;
  background:
    radial-gradient(ellipse 60% 45% at 50% 0%, rgba(232,217,184,.55), transparent 70%),
    radial-gradient(ellipse 45% 35% at 85% 80%, rgba(232,217,184,.4), transparent 70%),
    var(--paper);
}
.hero-inner{text-align:center;max-width:820px}
.hero-medal{width:210px;margin:0 auto 26px;filter:drop-shadow(0 14px 30px rgba(150,112,42,.3))}
.hero-domain{
  font-family:Georgia,serif;font-size:14px;letter-spacing:3px;
  color:var(--gold-deep);margin-bottom:18px;
}
.hero-title{
  font-size:clamp(32px,5.2vw,52px);
  font-weight:700;line-height:1.32;letter-spacing:2px;
  margin-bottom:22px;
}
.hero-sub{font-size:17px;color:var(--ink-soft);margin-bottom:26px;line-height:1.9}
.hero-sub strong{color:var(--gold-deep);font-weight:700}
.hero-gold{
  display:inline-block;
  font-size:20px;font-weight:700;letter-spacing:6px;
  color:var(--gold-deep);
  padding:12px 34px;
  border:1px solid var(--gold-soft);border-radius:999px;
  background:rgba(232,217,184,.22);
  margin-bottom:12px;
}
.hero-en{font-family:Georgia,serif;font-style:italic;font-size:14.5px;color:#9a9280;letter-spacing:1px;margin-bottom:34px}
.hero-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn{
  display:inline-block;padding:13px 36px;border-radius:999px;
  font-size:15.5px;font-weight:600;transition:all .2s;
}
.btn-primary{
  color:#fff;background:linear-gradient(135deg,var(--gold),var(--gold-deep));
  box-shadow:0 4px 16px rgba(150,112,42,.32);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 22px rgba(150,112,42,.42)}
.btn-ghost{color:var(--gold-deep);border:1.5px solid var(--gold-soft);background:rgba(255,255,255,.6)}
.btn-ghost:hover{background:var(--gold-soft)}

/* ---------- 通用 SECTION ---------- */
.section{padding:96px 24px}
.section-alt{background:var(--paper-alt)}
.section-inner{max-width:1080px;margin:0 auto}
.eyebrow{
  font-family:Georgia,serif;font-size:12.5px;letter-spacing:3px;
  color:var(--gold-deep);text-transform:uppercase;margin-bottom:10px;
}
.section h2{
  font-size:clamp(26px,3.6vw,38px);font-weight:700;letter-spacing:1px;
  margin-bottom:18px;line-height:1.4;
}
.h2-sub{font-size:15px;font-weight:400;color:var(--ink-soft);letter-spacing:1px;margin-left:10px}
.lede{font-size:16.5px;color:var(--ink-soft);max-width:760px;margin-bottom:44px}

/* ---------- 总纲公式 ---------- */
.formula{
  display:flex;align-items:stretch;justify-content:center;gap:14px;
  margin-bottom:40px;flex-wrap:wrap;
}
.formula-card{
  flex:1;min-width:200px;max-width:280px;
  background:#fff;border:1px solid var(--line);border-radius:18px;
  padding:30px 22px;text-align:center;
  transition:transform .25s, box-shadow .25s;
}
.formula-card:hover{transform:translateY(-4px);box-shadow:0 12px 28px rgba(150,112,42,.14)}
.f-tag{font-size:12px;color:var(--gold-deep);letter-spacing:2px;display:block;margin-bottom:10px}
.formula-card h3{font-size:26px;font-weight:700;margin-bottom:10px}
.f-left{border-top:3px solid var(--gold)}
.f-mid{border-top:3px solid #c8b273}
.f-right{border-top:3px solid var(--gold-deep)}
.formula-card p{font-size:14px;color:var(--ink-soft);line-height:1.8}
.formula-op{
  display:flex;align-items:center;font-size:30px;font-weight:300;
  color:var(--gold-deep);padding-top:40px;
}
.philosophy{
  text-align:center;font-size:clamp(19px,2.6vw,24px);font-weight:600;
  letter-spacing:3px;line-height:2;color:var(--gold-deep);
  padding:30px 20px;margin-bottom:36px;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.tri-value{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.tv-item{
  flex:1;min-width:220px;max-width:320px;text-align:center;
  background:rgba(232,217,184,.18);border-radius:14px;padding:22px 18px;
}
.tv-item h4{font-size:16px;margin-bottom:6px}
.tv-item p{font-size:14px;color:var(--ink-soft)}

/* ---------- 字义卡 ---------- */
.char-cards{display:flex;gap:20px;justify-content:center;margin-bottom:40px;flex-wrap:wrap}
.char-cards.three .char-card{max-width:260px}
.char-card{
  flex:1;max-width:300px;text-align:center;
  background:#fff;border:1px solid var(--line);border-radius:18px;
  padding:38px 24px;
  transition:transform .25s, box-shadow .25s;
}
.char-card:hover{transform:translateY(-4px);box-shadow:0 12px 28px rgba(150,112,42,.14)}
.char-big{
  display:inline-block;font-size:52px;font-weight:700;line-height:1;
  color:var(--gold);margin-bottom:16px;
}
.char-card h4{font-size:17px;margin-bottom:8px;letter-spacing:1px}
.char-card p{font-size:14px;color:var(--ink-soft);line-height:1.9}

.slogan-band{
  text-align:center;background:#fff;border:1px solid var(--line);
  border-radius:18px;padding:34px 26px;margin-bottom:30px;
}
.slogan-label{
  display:inline-block;font-size:12px;letter-spacing:3px;color:var(--gold-deep);
  border:1px solid var(--gold-soft);border-radius:999px;
  padding:4px 16px;margin-bottom:14px;
}
.slogan-main{font-size:clamp(18px,2.4vw,23px);font-weight:700;letter-spacing:2px;margin-bottom:10px}
.slogan-alt{font-size:14px;color:var(--ink-soft)}

.chips{display:flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:center}
.chip-title{font-size:13px;color:var(--gold-deep);letter-spacing:2px;margin-right:6px}
.chip{
  font-size:13.5px;padding:6px 16px;border-radius:999px;
  background:rgba(184,137,47,.09);border:1px solid var(--line);color:var(--ink-soft);
}
.tone-note{text-align:center;font-size:13.5px;color:#9a9280;margin-top:18px}

/* ---------- 亮ⁿU 暗色段 ---------- */
.section-dark{background:linear-gradient(160deg,var(--dark) 0%,var(--dark-2) 60%,#26211a 100%);color:#efe9dc}
.light-title{color:#f5efdf}
.light-sub{color:#b3a88e}
.light-lede{color:#c4bba6}
.section-dark .eyebrow{color:#d3b26a}
.symbol-grid{display:flex;gap:26px;justify-content:center;flex-wrap:wrap;margin-bottom:44px}
.symbol-card{
  flex:1;max-width:340px;text-align:center;
  background:rgba(255,255,255,.04);border:1px solid rgba(211,178,106,.25);
  border-radius:20px;padding:30px 24px;
  transition:transform .25s, border-color .25s;
}
.symbol-card:hover{transform:translateY(-4px);border-color:rgba(211,178,106,.55)}
.symbol-card img{border-radius:16px;margin-bottom:18px;width:220px;object-fit:cover;margin-left:auto;margin-right:auto}
.symbol-card h4{font-size:17px;letter-spacing:1px;margin-bottom:6px}
.symbol-card p{font-size:13.5px;color:#b3a88e}
.sym-logic{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-bottom:26px}
.sym-item{
  flex:1;min-width:180px;max-width:260px;text-align:center;
  background:rgba(211,178,106,.08);border-radius:14px;padding:22px 16px;
}
.sym-char{display:block;font-size:34px;font-weight:700;color:#d3b26a;margin-bottom:8px}
.sym-item p{font-size:13.5px;color:#c4bba6}
.sym-caption{text-align:center;font-size:13.5px;color:#8f8672;line-height:2}

/* ---------- 策划方案 ---------- */
.plan-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:20px;margin-bottom:44px}
.plan-card{
  background:#fff;border:1px solid var(--line);border-radius:18px;
  padding:28px 26px;transition:transform .25s, box-shadow .25s;
}
.plan-card:hover{transform:translateY(-3px);box-shadow:0 10px 26px rgba(150,112,42,.13)}
.plan-card h4{font-size:16.5px;margin-bottom:12px;display:flex;align-items:center;gap:10px}
.p-num{
  font-family:Georgia,serif;font-size:13px;color:var(--gold-deep);
  border:1px solid var(--gold-soft);border-radius:8px;padding:2px 9px;
}
.plan-card p{font-size:14.5px;color:var(--ink-soft);line-height:1.95}
.plan-card strong{color:var(--gold-deep)}

.scene-band{display:flex;gap:16px;flex-wrap:wrap}
.scene{
  flex:1;min-width:240px;border-radius:18px;padding:26px 24px;color:#fff;
}
.scene span{font-size:12px;letter-spacing:3px;opacity:.85;display:block;margin-bottom:8px}
.scene h4{font-size:18px;margin-bottom:6px;letter-spacing:1px}
.scene p{font-size:13.5px;opacity:.85}
.s1{background:linear-gradient(140deg,#a97e2c,#8a6423)}
.s2{background:linear-gradient(140deg,#4d4335,#2c2519)}
.s3{background:linear-gradient(140deg,#c3a45c,#96702a)}

/* ---------- 结语 ---------- */
.epilogue-story{max-width:720px;margin:0 auto 26px;font-size:16px;color:var(--ink-soft);line-height:2.1}
.epilogue-story p+p{margin-top:14px}
.epilogue-final{
  text-align:center;font-size:clamp(18px,2.4vw,22px);font-weight:700;
  letter-spacing:2px;color:var(--gold-deep);margin:36px 0 48px;
}
.contact-band{display:flex;gap:20px;flex-wrap:wrap;justify-content:center}
.contact-card{
  flex:1;min-width:280px;max-width:440px;
  background:#fff;border:1px solid var(--line);border-radius:18px;padding:30px 26px;
}
.contact-card h4{font-size:16.5px;margin-bottom:12px;letter-spacing:1px}
.contact-card p{font-size:14.5px;color:var(--ink-soft);line-height:1.95}
.contact-card.quote{background:rgba(232,217,184,.2)}
.contact-hint{margin-top:14px;font-size:13px;color:#9a9280}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:#a99f8a;padding:56px 24px 34px}
.footer-inner{max-width:1080px;margin:0 auto;display:flex;flex-direction:column;gap:26px}
.footer-brand{display:flex;align-items:center;gap:14px}
.footer-mark{width:48px;height:48px;border-radius:50%}
.footer-name{font-size:17px;font-weight:600;color:#efe9dc;letter-spacing:1px}
.footer-name sup{font-size:10px}
.footer-tag{font-size:13px;letter-spacing:2px}
.footer-nav{display:flex;gap:8px;flex-wrap:wrap}
.footer-nav a{
  font-size:13.5px;padding:6px 14px;border-radius:999px;
  background:rgba(255,255,255,.05);transition:background .2s,color .2s;
}
.footer-nav a:hover{background:rgba(211,178,106,.15);color:#d3b26a}
.footer-copy{font-size:12.5px;border-top:1px solid rgba(255,255,255,.08);padding-top:22px;letter-spacing:.5px}

/* ---------- 移动端：两行（上行 品牌+主按钮，下行 菜单换行） ---------- */
@media (max-width:860px){
  .header-inner{flex-wrap:wrap;padding:10px 16px;row-gap:8px}
  .brand{order:1}
  .nav-cta{order:2;margin-left:auto}
  .site-nav{order:3;width:100%;justify-content:flex-start;gap:6px}
  .nav-item{flex:1 0 auto;padding:7px 12px;font-size:13.5px}
  .nav-cta{padding:8px 18px;font-size:13.5px}
  .hero{padding-top:calc(var(--header-h) + 80px)}
  .hero-medal{width:160px}
  .hero-gold{letter-spacing:3px;padding:10px 22px;font-size:17px}
  .section{padding:70px 18px}
  .formula-op{display:none}
  .formula-card{max-width:none}
  .h2-sub{display:block;margin:6px 0 0}
}
@media (max-width:420px){
  .brand-name{font-size:17px}
  .nav-item{font-size:12.5px;padding:6px 9px}
}