/* ========== 基础变量 ========== */
:root{
  --ink: #0A0A0A;
  --ink-2: #111111;
  --ink-3: #1A1A1A;
  --line: rgba(255,255,255,0.08);
  --line-2: rgba(255,255,255,0.14);
  --paper: #F5F1E8;
  --paper-2: #ECE5D2;
  --gold: #C8A45C;
  --gold-2: #D9B776;
  --gold-dim: #8C7141;
  --mute: #8A8A8A;
  --mute-2: #5A5A5A;
  --white: #FFFFFF;
  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --sans: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --inter: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-2: cubic-bezier(0.65, 0, 0.35, 1);
  --maxw: 1280px;
}

/* ========== Reset ========== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--sans);
  font-size:16px;
  line-height:1.7;
  color:#1a1a1a;
  background:#FAF8F2;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
  font-feature-settings:"kern" 1, "liga" 1;
}
img,svg{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none;transition:color .25s var(--ease)}
button{font-family:inherit;cursor:pointer;border:none;background:none}
ul,ol{list-style:none}
details summary{cursor:pointer;list-style:none}
details summary::-webkit-details-marker{display:none}

::selection{background:var(--gold);color:var(--ink)}

/* ========== 通用容器 ========== */
.container{
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 32px;
  width:100%;
}

/* ========== 顶部信息条 ========== */
.topbar{
  background:var(--ink);
  color:var(--paper);
  font-size:13px;
  border-bottom:1px solid var(--line);
}
.topbar-inner{
  max-width:var(--maxw);
  margin:0 auto;
  padding:9px 32px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.topbar-text{
  color:var(--mute);
  letter-spacing:0.04em;
  flex:1;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}
.topbar-link{
  color:var(--gold);
  font-weight:500;
  font-family:var(--inter);
  letter-spacing:0.05em;
}
.topbar-link:hover{color:var(--gold-2)}

/* ========== Header ========== */
.header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(10,10,10,0.85);
  backdrop-filter:blur(20px) saturate(180%);
  -webkit-backdrop-filter:blur(20px) saturate(180%);
  border-bottom:1px solid var(--line);
  transition:background .3s var(--ease),border-color .3s var(--ease);
}
.header.scrolled{
  background:rgba(10,10,10,0.95);
}
.header-inner{
  max-width:var(--maxw);
  margin:0 auto;
  padding:18px 32px;
  display:flex;
  align-items:center;
  gap:32px;
}
.logo{
  display:flex;
  align-items:center;
  gap:10px;
  font-weight:700;
  color:var(--paper);
  flex-shrink:0;
  letter-spacing:0.02em;
}
.logo-mark{
  font-family:var(--serif);
  font-size:24px;
  font-weight:900;
  position:relative;
  line-height:1;
}
.logo-r{
  font-size:11px;
  color:var(--gold);
  position:relative;
  top:-10px;
  margin-left:1px;
  font-weight:600;
  font-family:var(--inter);
}
.logo-divider{
  color:var(--gold-dim);
  font-weight:300;
  font-size:18px;
}
.logo-sub{
  font-size:14px;
  font-weight:400;
  color:var(--mute);
  font-family:var(--sans);
  letter-spacing:0.08em;
}
.nav{
  display:flex;
  align-items:center;
  gap:30px;
  margin-left:auto;
}
.nav a{
  color:var(--paper-2);
  font-size:14.5px;
  font-weight:400;
  position:relative;
  padding:6px 0;
  letter-spacing:0.02em;
}
.nav a::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:1px;
  background:var(--gold);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .35s var(--ease);
}
.nav a:hover{color:var(--gold)}
.nav a:hover::after{transform:scaleX(1)}

.cta{
  margin-left:8px;
  padding:10px 22px;
  background:var(--gold);
  color:var(--ink);
  font-size:14px;
  font-weight:500;
  letter-spacing:0.08em;
  border:1px solid var(--gold);
  transition:all .3s var(--ease);
}
.cta:hover{
  background:transparent;
  color:var(--gold);
}
.menu-btn{
  display:none;
  width:32px;
  height:32px;
  flex-direction:column;
  justify-content:center;
  align-items:flex-end;
  gap:5px;
  margin-left:auto;
}
.menu-btn span{
  display:block;
  width:24px;
  height:1.5px;
  background:var(--paper);
  transition:all .3s var(--ease);
}
.menu-btn span:nth-child(2){width:18px}
.menu-btn.active span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.menu-btn.active span:nth-child(2){opacity:0}
.menu-btn.active span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}

.mobile-menu{
  display:none;
  flex-direction:column;
  background:var(--ink-2);
  border-top:1px solid var(--line);
  padding:20px 32px 30px;
}
.mobile-menu a{
  color:var(--paper-2);
  padding:14px 0;
  font-size:16px;
  border-bottom:1px solid var(--line);
  letter-spacing:0.04em;
}
.mobile-menu a:last-child{border-bottom:none}
.mobile-menu.open{display:flex}

/* ========== Hero ========== */
.hero{
  position:relative;
  min-height:calc(100vh - 60px);
  background:var(--ink);
  color:var(--paper);
  overflow:hidden;
  display:flex;
  align-items:center;
  padding:120px 0 80px;
}
.hero-bg{
  position:absolute;
  inset:0;
  z-index:0;
  pointer-events:none;
}
.hero-glow{
  position:absolute;
  border-radius:50%;
  filter:blur(120px);
  opacity:0.5;
  animation:floatGlow 12s ease-in-out infinite;
}
.hero-glow-1{
  width:600px;height:600px;
  top:-150px;right:-100px;
  background:radial-gradient(circle, rgba(200,164,92,0.4) 0%, transparent 70%);
}
.hero-glow-2{
  width:500px;height:500px;
  bottom:-200px;left:-100px;
  background:radial-gradient(circle, rgba(120,80,40,0.35) 0%, transparent 70%);
  animation-delay:-6s;
}
@keyframes floatGlow{
  0%,100%{transform:translate(0,0) scale(1)}
  50%{transform:translate(40px,-30px) scale(1.1)}
}
.hero-grid{
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(rgba(200,164,92,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(200,164,92,0.04) 1px, transparent 1px);
  background-size:60px 60px;
  mask-image:radial-gradient(ellipse at center, black 30%, transparent 75%);
  -webkit-mask-image:radial-gradient(ellipse at center, black 30%, transparent 75%);
}

.hero-inner{
  position:relative;
  z-index:1;
  max-width:1100px;
}
.hero-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:8px 16px;
  border:1px solid var(--line-2);
  border-radius:999px;
  font-size:13px;
  letter-spacing:0.15em;
  color:var(--paper-2);
  margin-bottom:32px;
  font-family:var(--inter);
}
.dot{
  width:6px;height:6px;
  background:var(--gold);
  border-radius:50%;
  box-shadow:0 0 8px var(--gold);
  animation:pulse 2s ease-in-out infinite;
}
@keyframes pulse{
  0%,100%{opacity:1}
  50%{opacity:0.4}
}

.hero-title{
  font-family:var(--serif);
  font-size:clamp(40px, 6.4vw, 84px);
  font-weight:900;
  line-height:1.05;
  letter-spacing:-0.01em;
  margin-bottom:32px;
  color:var(--paper);
}
.hero-title-accent{
  display:inline-block;
  color:var(--gold);
  font-weight:500;
  font-size:0.6em;
  letter-spacing:0.02em;
  margin-top:12px;
  font-family:var(--serif);
}

.hero-sub{
  font-size:clamp(15px,1.4vw,18px);
  line-height:1.8;
  color:var(--mute);
  max-width:720px;
  margin-bottom:48px;
  letter-spacing:0.02em;
}

.hero-actions{
  display:flex;
  gap:16px;
  margin-bottom:80px;
  flex-wrap:wrap;
}
.btn{
  display:inline-flex;
  align-items:center;
  padding:16px 32px;
  font-size:15px;
  font-weight:500;
  letter-spacing:0.1em;
  transition:all .35s var(--ease);
  border:1px solid transparent;
  position:relative;
  overflow:hidden;
}
.btn-primary{
  background:var(--gold);
  color:var(--ink);
  border-color:var(--gold);
}
.btn-primary:hover{
  background:var(--gold-2);
  border-color:var(--gold-2);
  transform:translateY(-2px);
}
.btn-ghost{
  background:transparent;
  color:var(--paper);
  border-color:var(--line-2);
}
.btn-ghost:hover{
  border-color:var(--gold);
  color:var(--gold);
}

.hero-stats{
  display:grid;
  grid-template-columns:repeat(4, 1fr);
  gap:0;
  border-top:1px solid var(--line);
  padding-top:40px;
}
.stat{
  padding:0 20px;
  border-left:1px solid var(--line);
}
.stat:first-child{
  border-left:none;
  padding-left:0;
}
.stat-num{
  font-family:var(--serif);
  font-size:clamp(32px,3.5vw,48px);
  font-weight:700;
  color:var(--gold);
  line-height:1;
  margin-bottom:8px;
  letter-spacing:-0.02em;
}
.stat-label{
  font-size:13px;
  color:var(--mute);
  letter-spacing:0.1em;
}

.scroll-hint{
  position:absolute;
  bottom:40px;
  left:50%;
  transform:translateX(-50%);
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:12px;
  color:var(--mute);
  font-size:11px;
  letter-spacing:0.3em;
  z-index:1;
  font-family:var(--inter);
}
.scroll-line{
  width:1px;
  height:50px;
  background:linear-gradient(to bottom, transparent, var(--gold));
  position:relative;
  overflow:hidden;
}
.scroll-line::after{
  content:"";
  position:absolute;
  width:100%;height:30%;
  background:var(--gold);
  top:-30%;
  animation:scrollDown 2s ease-in-out infinite;
}
@keyframes scrollDown{
  0%{top:-30%}
  100%{top:100%}
}

/* ========== Section 通用 ========== */
.section{
  padding:120px 0;
  position:relative;
  background:var(--paper);
  color:var(--ink);
}
.section-dark{
  background:var(--ink);
  color:var(--paper);
}
.section-head{
  max-width:780px;
  margin-bottom:80px;
}
.kicker{
  display:inline-block;
  font-family:var(--inter);
  font-size:12px;
  letter-spacing:0.4em;
  color:var(--gold);
  margin-bottom:20px;
  text-transform:uppercase;
}
.section-dark .kicker{color:var(--gold)}
.section-title{
  font-family:var(--serif);
  font-size:clamp(32px,4vw,52px);
  font-weight:700;
  line-height:1.2;
  margin-bottom:20px;
  letter-spacing:-0.005em;
}
.section-sub{
  font-size:clamp(15px,1.3vw,17px);
  color:var(--mute-2);
  line-height:1.8;
  letter-spacing:0.02em;
}
.section-dark .section-sub{color:var(--mute)}

/* ========== 核心优势 ========== */
.advantage-grid{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
}
.advantage-card{
  background:var(--ink);
  padding:48px 36px;
  position:relative;
  transition:background .4s var(--ease);
  overflow:hidden;
}
.advantage-card::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(135deg, transparent 50%, rgba(200,164,92,0.08) 100%);
  opacity:0;
  transition:opacity .4s var(--ease);
}
.advantage-card:hover{background:var(--ink-2)}
.advantage-card:hover::before{opacity:1}
.advantage-no{
  font-family:var(--serif);
  font-size:14px;
  color:var(--gold);
  margin-bottom:24px;
  letter-spacing:0.1em;
  font-weight:500;
}
.advantage-card h3{
  font-family:var(--serif);
  font-size:22px;
  font-weight:700;
  margin-bottom:16px;
  color:var(--paper);
  letter-spacing:0.005em;
  line-height:1.4;
}
.advantage-card p{
  color:var(--mute);
  font-size:14.5px;
  line-height:1.85;
  position:relative;
}

/* ========== 业务版块 ========== */
.service-list{
  display:grid;
  grid-template-columns:repeat(2, 1fr);
  gap:1px;
  background:rgba(0,0,0,0.08);
  border:1px solid rgba(0,0,0,0.08);
}
.service-item{
  background:var(--paper);
  padding:48px 40px;
  transition:background .3s var(--ease);
  position:relative;
}
.service-item:hover{
  background:var(--paper-2);
}
.service-tag{
  display:inline-block;
  font-family:var(--inter);
  font-size:11px;
  letter-spacing:0.3em;
  color:var(--gold);
  margin-bottom:20px;
  padding:4px 0;
  border-bottom:1px solid var(--gold);
}
.service-item h3{
  font-family:var(--serif);
  font-size:24px;
  font-weight:700;
  margin-bottom:14px;
  letter-spacing:0;
  line-height:1.4;
}
.service-item p{
  color:#555;
  font-size:15px;
  line-height:1.85;
}

/* ========== 平台矩阵 ========== */
.platform-grid{
  display:grid;
  grid-template-columns:repeat(4, 1fr);
  gap:16px;
}
.platform-card{
  background:var(--ink-2);
  border:1px solid var(--line);
  padding:36px 24px;
  text-align:center;
  transition:all .35s var(--ease);
  position:relative;
  overflow:hidden;
}
.platform-card:hover{
  border-color:var(--gold);
  transform:translateY(-4px);
  background:var(--ink-3);
}
.platform-ic{
  width:56px;height:56px;
  margin:0 auto 18px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-family:var(--serif);
  font-size:24px;
  font-weight:700;
  color:var(--paper);
  border:1px solid var(--line-2);
  border-radius:50%;
  transition:all .35s var(--ease);
}
.platform-card:hover .platform-ic{
  border-color:var(--gold);
  color:var(--gold);
}
.platform-ic-dy{background:linear-gradient(135deg,#000,#1a1a1a)}
.platform-ic-sp{background:linear-gradient(135deg,#07C160,#0a8c47)}
.platform-ic-xhs{background:linear-gradient(135deg,#FF2442,#a0101e)}
.platform-ic-tt{background:linear-gradient(135deg,#000,#1a1a1a)}
.platform-ic-ks{background:linear-gradient(135deg,#FF6600,#cc4f00)}
.platform-ic-bili{background:linear-gradient(135deg,#00A1D6,#006c91)}
.platform-ic-yt{background:linear-gradient(135deg,#FF0000,#990000)}
.platform-ic-xg{background:linear-gradient(135deg,#FF6633,#cc4f1f)}

.platform-card h3{
  font-family:var(--serif);
  font-size:18px;
  font-weight:700;
  margin-bottom:6px;
  letter-spacing:0.02em;
}
.platform-card p{
  color:var(--mute);
  font-size:13px;
  letter-spacing:0.05em;
}

/* ========== 服务流程 ========== */
.process-list{
  display:grid;
  grid-template-columns:repeat(6, 1fr);
  gap:0;
  position:relative;
}
.process-step{
  text-align:center;
  padding:0 12px;
  position:relative;
}
.process-step::after{
  content:"→";
  position:absolute;
  right:-12px;
  top:20px;
  color:var(--gold-dim);
  font-size:18px;
  z-index:1;
}
.process-step:last-child::after{display:none}
.process-num{
  font-family:var(--serif);
  font-size:42px;
  font-weight:900;
  color:var(--gold);
  line-height:1;
  margin-bottom:24px;
  letter-spacing:-0.02em;
  position:relative;
  display:inline-block;
}
.process-num::after{
  content:"";
  display:block;
  width:24px;
  height:1px;
  background:var(--gold);
  margin:14px auto 0;
}
.process-step h3{
  font-family:var(--serif);
  font-size:18px;
  font-weight:700;
  margin-bottom:10px;
  letter-spacing:0.02em;
}
.process-step p{
  color:var(--mute-2);
  font-size:13.5px;
  line-height:1.7;
}

/* ========== 客户案例 ========== */
.case-grid{
  display:grid;
  grid-template-columns:repeat(2, 1fr);
  gap:24px;
}
.case-card{
  background:var(--ink-2);
  border:1px solid var(--line);
  padding:44px 36px;
  transition:all .35s var(--ease);
  position:relative;
}
.case-card::before{
  content:"";
  position:absolute;
  top:0;left:0;
  width:0;
  height:2px;
  background:var(--gold);
  transition:width .5s var(--ease);
}
.case-card:hover{
  border-color:var(--line-2);
  transform:translateY(-4px);
}
.case-card:hover::before{width:100%}
.case-tag{
  display:inline-block;
  font-family:var(--inter);
  font-size:11px;
  letter-spacing:0.25em;
  color:var(--gold);
  margin-bottom:18px;
  padding:3px 10px;
  border:1px solid var(--gold-dim);
  border-radius:0;
}
.case-card h3{
  font-family:var(--serif);
  font-size:22px;
  font-weight:700;
  margin-bottom:14px;
  color:var(--paper);
  line-height:1.4;
}
.case-card p{
  color:var(--mute);
  font-size:14.5px;
  line-height:1.85;
  margin-bottom:20px;
}
.case-list{
  border-top:1px solid var(--line);
  padding-top:18px;
}
.case-list li{
  font-size:13.5px;
  color:var(--mute);
  padding:6px 0;
  position:relative;
  padding-left:14px;
  letter-spacing:0.02em;
}
.case-list li::before{
  content:"·";
  position:absolute;
  left:0;
  color:var(--gold);
  font-weight:700;
}

/* ========== 关于闫宝龙 ========== */
.about-grid{
  display:grid;
  grid-template-columns:380px 1fr;
  gap:80px;
  align-items:start;
}
.about-photo{
  position:sticky;
  top:120px;
}
.photo-frame{
  position:relative;
  overflow:hidden;
  background:var(--ink);
  aspect-ratio:4/5;
  border:1px solid rgba(0,0,0,0.08);
}
.photo-frame::before{
  content:"";
  position:absolute;
  inset:0;
  border:1px solid var(--gold);
  transform:translate(14px, 14px);
  z-index:-1;
}
.photo-frame img{
  width:100%;height:100%;
  object-fit:cover;
  object-position:center top;
  filter:grayscale(0.1) contrast(1.05);
  transition:filter .5s var(--ease), transform .5s var(--ease);
}
.photo-frame:hover img{
  filter:grayscale(0) contrast(1);
  transform:scale(1.02);
}
.photo-caption{
  margin-top:24px;
  text-align:center;
  font-size:14px;
  color:var(--mute-2);
  line-height:1.8;
  letter-spacing:0.05em;
}
.photo-caption strong{
  display:block;
  font-family:var(--serif);
  font-size:20px;
  color:var(--ink);
  margin-bottom:4px;
  letter-spacing:0.02em;
  font-weight:700;
}

.about-content p{
  font-size:16px;
  line-height:1.95;
  color:#333;
  margin-bottom:20px;
  letter-spacing:0.02em;
}
.about-content strong{
  color:var(--gold-dim);
  font-weight:600;
  border-bottom:1px solid var(--gold);
  padding-bottom:1px;
}
.about-list{
  margin-top:32px;
  display:grid;
  gap:14px;
}
.about-list li{
  display:flex;
  align-items:center;
  gap:14px;
  font-size:15px;
  color:#333;
  padding:14px 18px;
  background:rgba(200,164,92,0.06);
  border-left:2px solid var(--gold);
  letter-spacing:0.02em;
  transition:background .3s var(--ease);
}
.about-list li:hover{
  background:rgba(200,164,92,0.12);
}
.about-list .dot{
  width:6px;height:6px;
  background:var(--gold);
  border-radius:50%;
  flex-shrink:0;
  box-shadow:none;
  animation:none;
}

/* ========== FAQ ========== */
.faq-list{
  max-width:980px;
  margin:0 auto;
  display:grid;
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
}
.faq-item{
  background:var(--ink);
  transition:background .3s var(--ease);
}
.faq-item[open]{
  background:var(--ink-2);
}
.faq-item summary{
  padding:28px 32px;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:24px;
  font-size:16.5px;
  color:var(--paper);
  font-weight:500;
  letter-spacing:0.02em;
  font-family:var(--serif);
  user-select:none;
  position:relative;
  list-style:none;
}
.faq-item summary:hover{
  color:var(--gold);
}
.faq-icon{
  flex-shrink:0;
  width:28px;height:28px;
  position:relative;
  transition:transform .35s var(--ease);
}
.faq-icon::before,
.faq-icon::after{
  content:"";
  position:absolute;
  background:var(--gold);
  top:50%;left:50%;
  transform:translate(-50%,-50%);
  transition:all .3s var(--ease);
}
.faq-icon::before{
  width:14px;height:1.5px;
}
.faq-icon::after{
  width:1.5px;height:14px;
}
.faq-item[open] .faq-icon::after{
  transform:translate(-50%,-50%) scaleY(0);
}
.faq-body{
  padding:0 32px 32px;
  color:var(--mute);
  font-size:15px;
  line-height:1.95;
  letter-spacing:0.02em;
}
.faq-body p{margin:0}

/* ========== 联系方式 ========== */
.contact-grid{
  display:grid;
  grid-template-columns:repeat(4, 1fr);
  gap:20px;
}
.contact-card{
  background:var(--paper-2);
  padding:36px 24px;
  text-align:center;
  border:1px solid rgba(0,0,0,0.06);
  transition:all .35s var(--ease);
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:10px;
  position:relative;
}
.contact-card:hover{
  background:var(--paper);
  border-color:var(--gold);
  transform:translateY(-4px);
}
.contact-ic{
  font-size:32px;
  margin-bottom:8px;
  width:60px;height:60px;
  display:flex;
  align-items:center;
  justify-content:center;
  background:rgba(200,164,92,0.12);
  color:var(--gold);
  border-radius:50%;
  font-family:var(--serif);
}
.contact-label{
  font-size:12px;
  letter-spacing:0.25em;
  color:var(--mute-2);
  font-family:var(--inter);
}
.contact-value{
  font-family:var(--serif);
  font-size:22px;
  font-weight:700;
  color:var(--ink);
  letter-spacing:0.02em;
  word-break:break-all;
}
.contact-card:hover .contact-value{color:var(--gold-dim)}
.contact-qr img{
  width:160px;height:160px;
  margin-top:8px;
  border:1px solid rgba(0,0,0,0.1);
  padding:4px;
  background:#fff;
}
.contact-tip{
  font-size:12px;
  color:var(--mute-2);
  margin-top:6px;
  letter-spacing:0.1em;
}

/* ========== 友链 ========== */
.link-group{
  margin-bottom:48px;
}
.link-group:last-child{margin-bottom:0}
.link-group-title{
  font-family:var(--serif);
  font-size:18px;
  font-weight:700;
  color:var(--gold);
  margin-bottom:20px;
  letter-spacing:0.1em;
  position:relative;
  padding-left:16px;
}
.link-group-title::before{
  content:"";
  position:absolute;
  left:0;top:50%;
  transform:translateY(-50%);
  width:4px;height:18px;
  background:var(--gold);
}
.link-list{
  display:grid;
  grid-template-columns:repeat(auto-fill, minmax(180px, 1fr));
  gap:8px;
}
.link-list a{
  display:block;
  padding:12px 16px;
  color:var(--mute);
  font-size:14.5px;
  border:1px solid var(--line);
  background:var(--ink-2);
  letter-spacing:0.04em;
  transition:all .25s var(--ease);
  position:relative;
}
.link-list a:hover{
  color:var(--gold);
  border-color:var(--gold);
  background:var(--ink-3);
  padding-left:22px;
}
.link-list a:hover::before{
  content:"→";
  position:absolute;
  left:10px;
  color:var(--gold);
}

/* ========== Footer ========== */
.footer{
  background:#050505;
  color:var(--mute);
  padding:80px 0 0;
  border-top:1px solid var(--line);
}
.footer-inner{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:48px;
  padding-bottom:60px;
}
.footer-brand p{
  font-size:14px;
  line-height:1.9;
  color:var(--mute);
  margin-top:12px;
}
.footer-logo{
  font-family:var(--serif);
  font-size:24px;
  font-weight:700;
  color:var(--paper);
  margin-bottom:6px;
}
.footer-logo sup{color:var(--gold);font-size:13px;font-weight:600}
.footer-logo span{
  font-family:var(--sans);
  font-size:14px;
  font-weight:400;
  color:var(--mute);
  margin-left:6px;
  letter-spacing:0.05em;
}
.footer-col h4{
  font-family:var(--serif);
  font-size:15px;
  color:var(--paper);
  margin-bottom:18px;
  font-weight:600;
  letter-spacing:0.05em;
}
.footer-col a,
.footer-col span{
  display:block;
  font-size:14px;
  color:var(--mute);
  padding:6px 0;
  letter-spacing:0.04em;
  transition:color .25s var(--ease);
}
.footer-col a:hover{color:var(--gold)}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:24px 0;
  font-size:13px;
  text-align:center;
  background:#000;
}
.footer-bottom p{
  margin:6px 0;
  color:var(--mute-2);
  letter-spacing:0.04em;
}
.footer-bottom a{
  color:var(--mute);
  margin:0 4px;
  transition:color .25s var(--ease);
}
.footer-bottom a:hover{color:var(--gold)}
.dot-sep{
  color:var(--gold-dim);
  margin:0 10px;
}

/* ========== 浮动按钮 ========== */
.floating{
  position:fixed;
  right:24px;
  bottom:24px;
  z-index:99;
  display:flex;
  flex-direction:column;
  gap:12px;
}
.float-btn{
  display:flex;
  align-items:center;
  gap:8px;
  padding:12px 18px;
  background:var(--ink);
  color:var(--paper);
  font-size:13px;
  font-weight:500;
  border:1px solid var(--gold);
  letter-spacing:0.05em;
  transition:all .3s var(--ease);
  box-shadow:0 4px 20px rgba(0,0,0,0.15);
}
.float-btn span{
  font-size:16px;
  color:var(--gold);
}
.float-btn em{
  font-style:normal;
  font-size:13px;
}
.float-btn:hover{
  background:var(--gold);
  color:var(--ink);
}
.float-btn:hover span{color:var(--ink)}
.float-top{opacity:0;pointer-events:none;transform:translateY(10px)}
.float-top.show{opacity:1;pointer-events:auto;transform:translateY(0)}

/* ========== 响应式 ========== */
@media (max-width: 1100px){
  .nav{gap:22px}
  .nav a{font-size:13.5px}
  .process-list{grid-template-columns:repeat(3,1fr);gap:30px 0}
  .process-step::after{display:none}
  .platform-grid{grid-template-columns:repeat(4,1fr)}
  .contact-grid{grid-template-columns:repeat(2,1fr)}
  .footer-inner{grid-template-columns:1fr 1fr;gap:32px}
  .about-grid{grid-template-columns:300px 1fr;gap:48px}
}
@media (max-width: 860px){
  .container{padding:0 22px}
  .header-inner{padding:14px 22px;gap:16px}
  .nav,.cta{display:none}
  .menu-btn{display:flex;order:2;margin-left:auto}
  .logo{flex:1}
  .logo-mark{font-size:20px}
  .logo-sub{font-size:12px}
  .topbar-text{display:none}
  .topbar-inner{justify-content:flex-end}
  .hero{padding:80px 0 60px;min-height:auto}
  .hero-stats{grid-template-columns:repeat(2,1fr);gap:24px 0}
  .stat{padding:0 12px}
  .stat:nth-child(3){border-left:none;padding-left:0}
  .section{padding:80px 0}
  .section-head{margin-bottom:48px}
  .advantage-grid{grid-template-columns:1fr}
  .service-list{grid-template-columns:1fr}
  .platform-grid{grid-template-columns:repeat(2,1fr)}
  .process-list{grid-template-columns:repeat(2,1fr);gap:30px 0}
  .case-grid{grid-template-columns:1fr}
  .about-grid{grid-template-columns:1fr;gap:48px}
  .about-photo{position:static;max-width:300px;margin:0 auto}
  .contact-grid{grid-template-columns:1fr 1fr}
  .footer-inner{grid-template-columns:1fr 1fr;gap:32px}
  .floating{right:14px;bottom:14px}
  .float-btn{padding:10px 14px;font-size:12px}
  .scroll-hint{display:none}
  .hero-actions{flex-direction:column;align-items:stretch}
  .btn{justify-content:center}
}
@media (max-width: 480px){
  .topbar{padding:6px 0;font-size:12px}
  .hero-title{font-size:38px}
  .hero-stats{grid-template-columns:1fr;gap:20px}
  .stat{border-left:none;padding:0}
  .stat-num{font-size:36px}
  .section{padding:60px 0}
  .platform-grid{grid-template-columns:1fr 1fr}
  .contact-grid{grid-template-columns:1fr}
  .link-list{grid-template-columns:1fr 1fr}
  .footer-inner{grid-template-columns:1fr}
  .advantage-card,.service-item,.case-card,.faq-item summary{padding:24px 22px}
  .photo-frame{aspect-ratio:3/4}
}

/* ========== 入场动画 ========== */
.reveal{
  opacity:0;
  transform:translateY(30px);
  transition:opacity .8s var(--ease), transform .8s var(--ease);
}
.reveal.in{
  opacity:1;
  transform:translateY(0);
}
.reveal[data-delay="1"].in{transition-delay:0.1s}
.reveal[data-delay="2"].in{transition-delay:0.2s}
.reveal[data-delay="3"].in{transition-delay:0.3s}
.reveal[data-delay="4"].in{transition-delay:0.4s}
.reveal[data-delay="5"].in{transition-delay:0.5s}

/* ========== 可访问性 - 减少动画 ========== */
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:0.01ms !important;
    transition-duration:0.01ms !important;
  }
  .hero-glow{animation:none}
  .scroll-line::after{animation:none}
}