/* ==========================================================================
   光音AI漫剧坊 — 站点样式
   令牌层 → 基础层 → 组件层 → 响应式
   ========================================================================== */

:root{
  /* 色板：墨黑 + 暖金（唯一强调色） */
  --ink:#08080A;
  --ink-2:#0C0C10;
  --ink-3:#111117;
  --paper:#F0EBE2;
  --paper-dim:#C9C3B8;
  --muted:#8E8A82;
  --gold:#E0B070;
  --gold-lite:#F2D5A4;
  --amber:#F0A055;
  --line:rgba(240,235,226,.10);
  --line-strong:rgba(240,235,226,.18);
  --card:rgba(255,255,255,.028);

  /* 排版 */
  --font:"PingFang SC","HarmonyOS Sans SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-display:"Songti SC","Source Han Serif SC","Noto Serif SC",Georgia,"PingFang SC",serif;

  /* 节奏 */
  --wrap:1180px;
  --r:18px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}

html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--ink);
  color:var(--paper);
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,p,ul,ol,figure{margin:0;padding:0}
ul,ol{list-style:none}
::selection{background:rgba(224,176,112,.28);color:#fff}

.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 28px}

/* 锚点定位避开固定导航 */
section[id],main[id]{scroll-margin-top:88px}

/* ---------- 入场动画 ---------- */
[data-reveal]{opacity:0;transform:translateY(22px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
[data-reveal].in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  [data-reveal]{opacity:1;transform:none;transition:none}
  *{animation:none!important;transition:none!important}
}

/* ==========================================================================
   导航
   ========================================================================== */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:90;
  transition:background .4s var(--ease),border-color .4s var(--ease),backdrop-filter .4s;
  border-bottom:1px solid transparent;
}
.nav.scrolled{
  background:rgba(8,8,10,.82);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  border-bottom-color:var(--line);
}
.nav-inner{
  max-width:var(--wrap);margin:0 auto;padding:18px 28px;
  display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.nav.scrolled .nav-inner{padding-top:13px;padding-bottom:13px}

.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand-logo{
  width:36px;height:36px;flex:0 0 36px;display:block;border-radius:9px;
  /* logo 自带米色底，深色导航上给出一点外发光，避免边缘发脏 */
  box-shadow:0 2px 12px -4px rgba(0,0,0,.8),0 0 0 1px rgba(240,235,226,.10);
}
.brand-txt{display:flex;flex-direction:column;line-height:1.25;min-width:0}
.brand-txt strong{font-size:16px;font-weight:600;letter-spacing:.05em;white-space:nowrap}
.brand-txt em{
  font-style:normal;font-size:8.5px;letter-spacing:.19em;
  color:var(--muted);text-transform:uppercase;white-space:nowrap;
  margin-top:3px;
}

.nav-links{display:flex;align-items:center;gap:34px}
.nav-links a{
  font-size:14px;color:var(--paper-dim);position:relative;
  transition:color .3s var(--ease);
  padding:4px 0;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:1px;
  background:var(--gold);transform:scaleX(0);transform-origin:left;
  transition:transform .35s var(--ease);
}
.nav-links a:hover{color:var(--paper)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links .nav-cta{
  color:var(--ink);background:var(--gold);
  padding:9px 20px;border-radius:100px;font-size:13.5px;font-weight:500;
  transition:background .3s var(--ease),transform .3s var(--ease);
}
.nav-links .nav-cta::after{display:none}
.nav-links .nav-cta:hover{background:var(--gold-lite);transform:translateY(-1px)}

.nav-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--line-strong);
  border-radius:50%;background:none;cursor:pointer;position:relative;
  padding:0;
}
.nav-toggle span{
  position:absolute;left:13px;width:16px;height:1.4px;background:var(--paper);
  transition:transform .35s var(--ease),opacity .25s;
}
.nav-toggle span:nth-child(1){top:18px}
.nav-toggle span:nth-child(2){top:24px}
.nav-toggle.open span:nth-child(1){transform:translateY(3px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){transform:translateY(-3px) rotate(-45deg)}

.mobile-menu{
  position:fixed;inset:0;z-index:80;background:rgba(8,8,10,.97);
  backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  display:flex;flex-direction:column;justify-content:center;gap:6px;
  padding:80px 32px;opacity:0;pointer-events:none;transition:opacity .35s var(--ease);
}
.mobile-menu.open{opacity:1;pointer-events:auto}
.mobile-menu a{
  font-size:24px;font-weight:500;padding:14px 0;color:var(--paper);
  border-bottom:1px solid var(--line);
}
.mobile-menu a:last-child{color:var(--gold);border-bottom:0}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero{
  position:relative;min-height:100svh;
  display:flex;align-items:center;
  padding:132px 0 84px;
  overflow:hidden;
}
.hero-bg{position:absolute;inset:0;pointer-events:none;z-index:0}
.beam{
  position:absolute;top:-30%;left:-10%;width:70vw;height:150vh;
  background:conic-gradient(from 200deg at 10% 40%,transparent 0deg,rgba(224,176,112,.10) 12deg,rgba(224,176,112,.03) 26deg,transparent 40deg);
  filter:blur(6px);
  transform:rotate(-4deg);
}
.glow{position:absolute;border-radius:50%;filter:blur(90px);opacity:.5}
.g1{width:44vw;height:44vw;top:-14vw;right:-8vw;background:radial-gradient(circle,rgba(224,176,112,.20),transparent 68%)}
.g2{width:50vw;height:40vw;bottom:-22vw;left:-14vw;background:radial-gradient(circle,rgba(240,160,85,.10),transparent 70%)}
.grain{
  position:absolute;inset:0;opacity:.30;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='.42'/%3E%3C/svg%3E");
}

.hero-grid{
  position:relative;z-index:1;
  display:grid;grid-template-columns:1.05fr .95fr;gap:64px;align-items:center;
}

.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-size:12.5px;letter-spacing:.16em;color:var(--gold);
  border:1px solid rgba(224,176,112,.28);border-radius:100px;
  padding:6px 15px 6px 12px;margin-bottom:26px;
  background:rgba(224,176,112,.05);
}
.eyebrow .dot{
  width:5px;height:5px;border-radius:50%;background:var(--gold);
  box-shadow:0 0 0 3px rgba(224,176,112,.16);
  animation:blink 3.4s var(--ease) infinite;
}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.35}}

.hero h1{
  font-family:var(--font-display);
  font-size:clamp(44px,6.2vw,84px);
  line-height:1.06;font-weight:600;letter-spacing:.01em;
  margin-bottom:22px;
}
.hero h1 .l1{
  display:block;
  background:linear-gradient(96deg,var(--gold-lite) 0%,var(--gold) 44%,var(--amber) 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero h1 .l2{display:block;color:var(--paper);font-size:.62em;letter-spacing:.02em;margin-top:6px}

.hero-claim{
  font-size:clamp(17px,1.9vw,21px);line-height:1.6;font-weight:500;
  color:var(--paper);letter-spacing:.02em;margin-bottom:18px;
}
.hero-sub{
  font-size:15px;line-height:1.95;color:var(--paper-dim);
  max-width:52ch;margin-bottom:34px;
}
.br-m{display:none}

.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  height:50px;padding:0 30px;border-radius:100px;
  font-size:14.5px;font-weight:500;letter-spacing:.03em;
  transition:transform .35s var(--ease),background .35s var(--ease),border-color .35s var(--ease),color .35s;
  will-change:transform;
}
.btn-primary{
  background:linear-gradient(100deg,var(--gold-lite),var(--gold));
  color:#1A1408;
  box-shadow:0 12px 34px -14px rgba(224,176,112,.75);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 40px -16px rgba(224,176,112,.9)}
.btn-ghost{border:1px solid var(--line-strong);color:var(--paper)}
.btn-ghost:hover{border-color:rgba(224,176,112,.55);color:var(--gold-lite);transform:translateY(-2px)}

.hero-tags{display:flex;flex-wrap:wrap;gap:10px}
.hero-tags li{
  font-size:12.5px;color:var(--muted);letter-spacing:.06em;
  border:1px solid var(--line);border-radius:100px;padding:5px 14px;
}

/* Hero 视觉：帧 + 声波 */
.hero-visual{position:relative}
.stage{
  position:relative;border:1px solid var(--line-strong);border-radius:22px;
  background:
    radial-gradient(120% 90% at 80% 0%,rgba(224,176,112,.10),transparent 60%),
    linear-gradient(165deg,#121218,#0A0A0E 60%,#0D0D12);
  padding:18px;overflow:hidden;
  box-shadow:0 40px 90px -50px rgba(0,0,0,.95),inset 0 1px 0 rgba(255,255,255,.04);
}
.stage::after{ /* 扫光 */
  content:"";position:absolute;top:0;left:-40%;width:38%;height:100%;
  background:linear-gradient(105deg,transparent,rgba(255,255,255,.07),transparent);
  transform:skewX(-14deg);
  animation:sweep 7.5s var(--ease) infinite;
  pointer-events:none;
}
@keyframes sweep{0%{left:-45%}55%,100%{left:118%}}

.stage-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px;padding:0 2px}
.rec{display:inline-flex;align-items:center;gap:6px;font-size:9.5px;letter-spacing:.2em;color:var(--muted)}
.rec i{width:5px;height:5px;border-radius:50%;background:#E06A5A;box-shadow:0 0 8px #E06A5A;animation:blink 1.8s infinite}
.stage-title{font-size:10px;letter-spacing:.4em;color:rgba(224,176,112,.6)}

.frames{display:grid;grid-template-columns:repeat(3,1fr);gap:9px}
.frame{
  position:relative;border-radius:11px;overflow:hidden;
  aspect-ratio:3/4;border:1px solid rgba(255,255,255,.07);
  transition:transform .6s var(--ease);
}
.frame:hover{transform:translateY(-4px)}
.fnum{
  position:absolute;top:7px;left:8px;z-index:2;
  font-size:9px;letter-spacing:.14em;color:rgba(255,255,255,.75);
  font-variant-numeric:tabular-nums;
}
.frame figcaption{
  position:absolute;left:0;right:0;bottom:0;z-index:2;
  font-size:9.5px;letter-spacing:.05em;color:rgba(255,255,255,.82);
  padding:20px 8px 8px;
  background:linear-gradient(to top,rgba(6,6,9,.9),transparent);
}
.fart{position:absolute;inset:0}
/* 漫画网点纹理 */
.fart::before{
  content:"";position:absolute;inset:0;z-index:1;opacity:.30;
  background-image:radial-gradient(rgba(0,0,0,.55) .8px,transparent .9px);
  background-size:3px 3px;mix-blend-mode:multiply;
}
.fart::after{content:"";position:absolute;inset:0;z-index:1}
.fart.a{background:
  radial-gradient(60% 50% at 30% 24%,rgba(242,213,164,.55),transparent 70%),
  radial-gradient(70% 60% at 80% 78%,rgba(240,160,85,.42),transparent 72%),
  linear-gradient(160deg,#2A2118,#14100C);}
/* 山脊剪影 */
.fart.a::after{
  background:#0A0908;opacity:.94;
  clip-path:polygon(0 100%,0 66%,16% 46%,30% 62%,46% 32%,60% 56%,74% 40%,88% 58%,100% 48%,100% 100%);
}
.fart.b{background:
  radial-gradient(55% 45% at 68% 30%,rgba(200,214,230,.38),transparent 70%),
  radial-gradient(65% 55% at 24% 76%,rgba(224,176,112,.34),transparent 72%),
  linear-gradient(200deg,#1B1C22,#0E0F13);}
/* 城市天际线剪影 */
.fart.b::after{
  background:#08080C;opacity:.94;
  clip-path:polygon(0 100%,0 64%,9% 64%,9% 50%,17% 50%,17% 68%,26% 68%,26% 42%,34% 42%,34% 60%,44% 60%,44% 30%,52% 30%,52% 56%,60% 56%,60% 46%,68% 46%,68% 70%,78% 70%,78% 38%,86% 38%,86% 62%,94% 62%,94% 52%,100% 52%,100% 100%);
}
.fart.c{background:
  radial-gradient(circle at 50% 44%,#FFE6C0 0 8%,rgba(250,192,132,.72) 13%,rgba(206,138,84,.22) 30%,transparent 48%),
  radial-gradient(70% 50% at 18% 92%,rgba(160,110,70,.45),transparent 72%),
  linear-gradient(150deg,#2A1E14,#120D0A);}
/* 地平线 + 光轴 */
.fart.c::after{
  background:
    linear-gradient(to top,rgba(9,7,6,.96),rgba(9,7,6,.55) 26%,transparent 58%),
    linear-gradient(to bottom,transparent 61.4%,rgba(242,213,164,.85) 61.6%,transparent 62.2%);
}

.wave{
  display:flex;align-items:center;justify-content:space-between;
  gap:3px;height:42px;margin-top:16px;padding:0 3px;
}
.wave span{
  flex:1;min-height:2px;border-radius:2px;
  height:var(--h,56%);
  background:linear-gradient(to top,rgba(224,176,112,.18),rgba(224,176,112,.9));
  transform-origin:bottom;
  animation:bar var(--d,1.9s) var(--ease) infinite alternate;
}
@keyframes bar{from{transform:scaleY(.38)}to{transform:scaleY(1)}}

.stage-note{
  margin-top:16px;font-size:12px;color:var(--muted);letter-spacing:.06em;
  text-align:center;
}

.scroll-hint{
  position:absolute;left:50%;bottom:26px;transform:translateX(-50%);
  width:20px;height:32px;border:1px solid var(--line-strong);border-radius:12px;
  z-index:2;
}
.scroll-hint span{
  position:absolute;left:50%;top:7px;width:3px;height:6px;margin-left:-1.5px;
  background:var(--gold);border-radius:2px;
  animation:scrollDot 2.4s var(--ease) infinite;
}
@keyframes scrollDot{0%{opacity:0;transform:translateY(0)}30%{opacity:1}100%{opacity:0;transform:translateY(11px)}}

/* ==========================================================================
   简介条
   ========================================================================== */
.intro{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--ink-2)}
.intro-inner{padding:64px 28px}
.intro-inner p{
  font-size:clamp(16px,1.55vw,19px);line-height:2.05;color:var(--paper-dim);
  max-width:1000px;
}
.intro-inner em{font-style:normal;color:var(--gold-lite);position:relative;white-space:nowrap}
.intro-inner em::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:1px;
  background:linear-gradient(to right,rgba(224,176,112,.55),transparent);
}

/* ==========================================================================
   通用区块
   ========================================================================== */
.section{padding:112px 0;position:relative}
.sec-head{margin-bottom:56px;max-width:720px}
.sec-kicker{
  font-size:11px;letter-spacing:.28em;color:var(--gold);
  margin-bottom:16px;text-transform:uppercase;
}
.sec-head h2,.idea-left h2,.contact h2{
  font-family:var(--font-display);
  font-size:clamp(28px,3.5vw,44px);line-height:1.3;font-weight:600;
  letter-spacing:.01em;margin-bottom:18px;
}
.sec-desc{font-size:15px;line-height:1.9;color:var(--muted);max-width:56ch}

/* ---------- 业务卡 ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{
  position:relative;border:1px solid var(--line);border-radius:var(--r);
  background:linear-gradient(170deg,rgba(255,255,255,.035),rgba(255,255,255,.012));
  padding:34px 30px 36px;
  transition:border-color .45s var(--ease),transform .45s var(--ease),background .45s var(--ease);
  overflow:hidden;
}
.card::before{
  content:"";position:absolute;inset:0;border-radius:var(--r);pointer-events:none;
  background:radial-gradient(120% 80% at 50% -10%,rgba(224,176,112,.14),transparent 62%);
  opacity:0;transition:opacity .45s var(--ease);
}
.card:hover{border-color:rgba(224,176,112,.36);transform:translateY(-6px)}
.card:hover::before{opacity:1}

.card-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:22px}
.idx{
  font-family:var(--font-display);font-size:15px;color:var(--gold);
  letter-spacing:.1em;font-variant-numeric:tabular-nums;
}
.card-en{font-size:9.5px;letter-spacing:.18em;color:var(--muted);text-align:right;line-height:1.5}
.card h3{
  font-size:22px;font-weight:600;letter-spacing:.02em;margin-bottom:16px;
  font-family:var(--font-display);
}
.card-desc{font-size:14px;line-height:1.95;color:var(--paper-dim);margin-bottom:14px}
.card-list{margin-top:22px;padding-top:22px;border-top:1px solid var(--line)}
.card-list li{
  position:relative;padding-left:16px;font-size:13.5px;line-height:2.1;
  color:var(--paper-dim);
}
.card-list li::before{
  content:"";position:absolute;left:0;top:.95em;
  width:5px;height:1px;background:var(--gold);opacity:.85;
}

/* ---------- 流程 ---------- */
.process{border-top:1px solid var(--line);background:var(--ink-2)}
.steps{display:grid;grid-template-columns:repeat(6,1fr);gap:0;counter-reset:s}
.steps li{
  position:relative;padding:28px 18px 26px 0;
  border-top:1px solid var(--line-strong);
}
.steps li::before{ /* 节点 */
  content:"";position:absolute;top:-4px;left:0;width:7px;height:7px;
  border-radius:50%;background:var(--gold);box-shadow:0 0 0 4px rgba(224,176,112,.12);
}
.steps li::after{ /* 连接线 */
  content:"";position:absolute;top:-1px;left:11px;right:0;height:1px;
  background:linear-gradient(to right,rgba(224,176,112,.4),rgba(224,176,112,.06));
}
.steps li:last-child::after{display:none}
.sn{
  display:block;font-size:10px;letter-spacing:.18em;color:var(--gold);
  margin-bottom:12px;font-variant-numeric:tabular-nums;
}
.steps b{display:block;font-size:15.5px;font-weight:600;letter-spacing:.02em;margin-bottom:7px}
.steps i{display:block;font-style:normal;font-size:12.5px;line-height:1.7;color:var(--muted)}

/* ---------- 理念 ---------- */
.idea-grid{display:grid;grid-template-columns:1fr .82fr;gap:80px;align-items:start}
.idea-left h2{margin-bottom:26px}
.idea-desc{font-size:14.5px;line-height:2;color:var(--paper-dim);margin-bottom:16px;max-width:48ch}

.pillar{
  border-left:1px solid var(--line-strong);padding:4px 0 28px 26px;
  transition:border-color .45s var(--ease);
}
.pillar:last-child{padding-bottom:0}
.pillar:hover{border-left-color:var(--gold)}
.pn{
  display:block;font-size:17px;font-weight:600;letter-spacing:.03em;
  margin-bottom:9px;color:var(--gold-lite);font-family:var(--font-display);
}
.pillar p{font-size:13.5px;line-height:1.95;color:var(--muted);max-width:34ch}

/* ---------- 服务对象 ---------- */
.audience{border-top:1px solid var(--line)}
.aud-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.aud{
  border:1px solid var(--line);border-radius:var(--r);
  padding:28px 26px;background:var(--card);
  transition:border-color .4s var(--ease),background .4s var(--ease),transform .4s var(--ease);
}
.aud:hover{border-color:rgba(224,176,112,.32);background:rgba(255,255,255,.045);transform:translateY(-4px)}
.aud svg{width:26px;height:26px;color:var(--gold);margin-bottom:18px}
.aud h3{font-size:16px;font-weight:600;letter-spacing:.02em;margin-bottom:10px}
.aud p{font-size:13px;line-height:1.9;color:var(--muted)}

.aud-quote{
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(150deg,rgba(224,176,112,.10),rgba(224,176,112,.02));
  border-color:rgba(224,176,112,.3);
  text-align:center;
}
.aud-quote p{
  font-family:var(--font-display);font-size:17px;line-height:1.85;
  color:var(--gold-lite);letter-spacing:.04em;
}

/* ---------- 联系 ---------- */
.contact{
  border-top:1px solid var(--line);
  background:
    radial-gradient(90% 70% at 82% 12%,rgba(224,176,112,.10),transparent 62%),
    var(--ink-2);
}
.contact-grid{display:grid;grid-template-columns:1fr 340px;gap:72px;align-items:center}
.contact-desc{font-size:14.5px;line-height:2;color:var(--paper-dim);margin:0 0 38px;max-width:50ch}

.contact-rows{border-top:1px solid var(--line)}
.crow{
  display:grid;grid-template-columns:1fr auto;align-items:center;
  gap:4px 20px;padding:22px 0;border-bottom:1px solid var(--line);
  transition:padding .35s var(--ease);
}
.crow .cl{grid-column:1;font-size:11px;letter-spacing:.16em;color:var(--muted)}
.crow strong{
  grid-column:1;font-family:var(--font-display);
  font-size:clamp(26px,2.8vw,36px);font-weight:600;letter-spacing:.02em;
  color:var(--paper);line-height:1.25;
  transition:color .35s var(--ease);
}
.crow .cn{grid-column:2;grid-row:1/3;font-size:13px;color:var(--gold);white-space:nowrap}
a.crow:hover strong{color:var(--gold-lite)}
.crow-static strong.cstrong-sm{
  font-family:var(--font);font-size:15px;font-weight:500;
  color:var(--paper-dim);letter-spacing:.02em;
}

.contact-tip{font-size:12.5px;line-height:1.9;color:var(--muted);margin-top:22px;max-width:48ch}

.qr-card{
  border:1px solid rgba(224,176,112,.28);border-radius:20px;
  background:linear-gradient(170deg,rgba(224,176,112,.09),rgba(255,255,255,.015));
  padding:22px 22px 26px;text-align:center;
  box-shadow:0 40px 80px -50px rgba(0,0,0,.9);
}
.qr-frame{
  background:#fff;border-radius:12px;padding:12px;
  margin-bottom:18px;
}
.qr-frame img{width:100%;height:auto;border-radius:6px}
.qr-title{font-size:15px;font-weight:600;letter-spacing:.06em;margin-bottom:6px}
.qr-sub{font-size:12.5px;color:var(--muted);letter-spacing:.04em}

/* ---------- 留资表单 ---------- */
.lead{
  margin-top:64px;padding:28px 32px 26px;border:1px solid var(--line);
  border-radius:var(--r);background:linear-gradient(160deg,rgba(255,255,255,.04),rgba(255,255,255,.012));
}
.lead-copy{display:flex;flex-wrap:wrap;align-items:baseline;gap:6px 18px;margin-bottom:22px}
.lead-copy h3{font-family:var(--font-display);font-size:19px;font-weight:600;letter-spacing:.02em}
.lead-copy p{font-size:12.5px;line-height:1.8;color:var(--muted)}
.lead-form{display:flex;flex-wrap:wrap;gap:12px;align-items:flex-end}
.lf{flex:1 1 150px;display:block;min-width:0}
.lf.wide{flex:2 1 240px}
.lf span{display:block;font-size:11px;letter-spacing:.12em;color:var(--muted);margin-bottom:6px}
.lf input{
  width:100%;height:46px;padding:0 14px;border-radius:10px;
  background:rgba(0,0,0,.28);border:1px solid var(--line);color:var(--paper);
  font-family:inherit;font-size:14px;outline:none;
  transition:border-color .3s var(--ease),background .3s var(--ease);
}
.lf input::placeholder{color:rgba(240,235,226,.26)}
.lf input:focus{border-color:rgba(224,176,112,.55);background:rgba(0,0,0,.42)}
.lead-form .btn{flex:0 0 auto;height:46px;padding:0 26px}
@media (max-width:1180px){ .lead-form .btn{width:100%} }
.lead-note{grid-column:1/-1;margin:14px 0 0;font-size:13px;color:var(--gold)}
.lead-note.bad{color:#E08573}

/* ==========================================================================
   页脚
   ========================================================================== */
.footer{border-top:1px solid var(--line);background:var(--ink);padding:56px 0 48px}
.footer-inner{display:grid;grid-template-columns:1.2fr 1fr auto;gap:40px;align-items:start}
.f-brand{display:flex;align-items:center;gap:12px}
.f-logo{width:40px;height:40px;border-radius:10px;flex:0 0 40px;box-shadow:0 0 0 1px rgba(240,235,226,.08)}
.f-brand strong{font-size:16px;font-weight:600;letter-spacing:.06em;display:block;margin-bottom:4px}
.f-brand p{font-size:13px;color:var(--muted)}
.f-links{display:flex;flex-wrap:wrap;gap:22px}
.f-links a{font-size:13px;color:var(--paper-dim);transition:color .3s}
.f-links a:hover{color:var(--gold)}
.f-meta{text-align:right;font-size:12.5px;color:var(--muted)}
.f-copy{margin-top:6px;opacity:.7}
/* 备案号：可点击跳备案系统，视觉上保持灰字，只加一条细下划线 */
.f-copy a{color:inherit;text-decoration:none;border-bottom:1px solid rgba(240,235,226,.18);transition:color .3s,border-color .3s}
.f-copy a:hover{color:var(--gold);border-color:var(--gold)}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width:1080px){
  .hero-grid{grid-template-columns:1fr;gap:56px}
  .hero{min-height:auto;padding:128px 0 92px}
  .hero-visual{max-width:560px}
  .stage-note{text-align:left}
  .cards{grid-template-columns:1fr;gap:16px}
  .steps{grid-template-columns:repeat(3,1fr);row-gap:8px}
  .steps li:nth-child(3n)::after{display:none}
  .idea-grid{grid-template-columns:1fr;gap:48px}
  .aud-grid{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:1fr;gap:48px}
  .qr-card{max-width:340px}
  .lead{grid-template-columns:1fr;gap:20px;padding:24px 22px}
  .footer-inner{grid-template-columns:1fr 1fr;gap:28px}
  .f-meta{grid-column:1/-1;text-align:left}
}

@media (max-width:860px){
  .nav-links{display:none}
  .nav-toggle{display:block}
  .wrap{padding:0 20px}
  .nav-inner{padding:14px 20px}
  .brand-logo{width:32px;height:32px;flex:0 0 32px;border-radius:8px}
  .section{padding:72px 0}
  .sec-head{margin-bottom:40px}
  .intro-inner{padding:48px 20px}
  .hero-tags li{font-size:11.5px;padding:4px 12px}
  .scroll-hint{display:none}
}

@media (max-width:640px){
  body{font-size:15px}
  .hero{padding:112px 0 72px}
  .hero h1{font-size:clamp(38px,11vw,54px)}
  .hero h1 .l2{font-size:.58em}
  .br-m{display:block}
  .hero-claim{font-size:17px}
  .hero-sub{font-size:14px;line-height:1.9}
  .hero-actions{gap:10px}
  .btn{height:46px;padding:0 22px;font-size:13.5px;flex:1 1 auto}
  .stage{padding:14px;border-radius:18px}
  .frames{gap:7px}
  .steps{grid-template-columns:repeat(2,1fr)}
  .steps li:nth-child(3n)::after{display:block}
  .steps li:nth-child(2n)::after{display:none}
  .aud-grid{grid-template-columns:1fr}
  .card{padding:28px 24px 30px}
  .card h3{font-size:20px}
  .idea-left h2,.contact h2{font-size:26px}
  .crow strong{font-size:30px}
  .crow .cn{font-size:12px}
  .footer-inner{grid-template-columns:1fr;gap:26px}
  .qr-card{padding:18px 18px 22px}
  .sec-head h2{font-size:27px}
  .lead{margin-top:44px;padding:22px 18px}
  .lead-form{gap:10px}
  .lf,.lf.wide{flex:1 1 100%}
  .lead-form .btn{width:100%}
}

@media (max-width:380px){
  .brand-txt em{display:none}
  .crow{grid-template-columns:1fr}
  .crow .cn{grid-column:1;grid-row:auto;margin-top:2px}
}