/* ============================================================
   汇宇科技集团 官网样式
   设计基调：浅色高端、留白通透、流体渐变动效
   ============================================================ */

/* ---------- 字体 ---------- */
@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;600;700;900&family=Noto+Sans+SC:wght@300;400;500;700&family=Playfair+Display:ital,wght@0,500;0,700;1,500&display=swap');

/* ---------- 设计变量 ---------- */
:root{
  /* 基础色 */
  --bg:        #f5f7fc;
  --bg-soft:   #eef2fa;
  --surface:   #ffffff;
  --surface-2: #fbfcfe;
  --line:      #e6eaf2;

  /* 文字色 */
  --ink:       #1b2540;
  --ink-soft:  #5b6478;
  --ink-faint: #9aa3b8;

  /* 品牌渐变色 */
  --azure:     #3658f5;
  --azure-2:   #6e8bff;
  --teal:      #18c9bd;
  --violet:    #8c6bff;
  --gold:      #cda45e;
  --gold-soft: #f6ecd9;

  /* 阴影与圆角 */
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --shadow-lg: 0 30px 80px -30px rgba(27, 37, 64, .18);
  --shadow-md: 0 16px 40px -20px rgba(27, 37, 64, .16);
  --shadow-sm: 0 8px 20px -12px rgba(27, 37, 64, .14);

  /* 排版 */
  --font-display: 'Noto Serif SC', 'Source Han Serif SC', serif;
  --font-accent:  'Playfair Display', 'Noto Serif SC', serif;
  --font-body:    'Noto Sans SC', -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;

  --container: 1180px;
}

/* ---------- 重置 ---------- */
*,*::before,*::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img{ max-width:100%; display:block; }
a{ color: inherit; text-decoration: none; }
ul{ margin:0; padding:0; list-style:none; }
h1,h2,h3,h4,h5{ font-family: var(--font-display); margin:0; color: var(--ink); }
p{ margin:0; }
button{ font-family: inherit; cursor:pointer; border:none; background:none; }
input,textarea,select{ font-family: inherit; }

::selection{ background: var(--azure); color:#fff; }

/* 自定义滚动条 */
::-webkit-scrollbar{ width:10px; }
::-webkit-scrollbar-track{ background: var(--bg-soft); }
::-webkit-scrollbar-thumb{
  background: linear-gradient(180deg, var(--azure-2), var(--teal));
  border-radius:10px;
}

/* ---------- 通用布局 ---------- */
.container{
  width:100%;
  max-width: var(--container);
  margin:0 auto;
  padding: 0 28px;
}
.section{ position:relative; padding: 120px 0; }
.section--tight{ padding: 90px 0; }
.section--alt{ background: var(--bg-soft); }
.section-head{
  max-width: 720px;
  margin: 0 auto 64px;
  text-align:center;
}
.section-head.is-left{ margin:0 0 56px; text-align:left; }
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family: var(--font-accent);
  font-style: italic;
  letter-spacing: .22em;
  text-transform: uppercase;
  font-size: 13px;
  color: var(--azure);
  margin-bottom: 18px;
}
.eyebrow::before{
  content:"";
  display:inline-block;
  width: 28px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold));
}
.eyebrow::after{
  content:"";
  display:inline-block;
  width: 28px; height: 1px;
  background: linear-gradient(90deg, var(--gold), transparent);
}
.section-title{
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: .02em;
}
.section-title .accent{
  background: linear-gradient(120deg, var(--azure), var(--violet) 55%, var(--teal));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.section-sub{
  margin-top: 18px;
  color: var(--ink-soft);
  font-size: 16px;
  line-height: 1.9;
}

/* ============================================================
   流体动态背景（信号元素）
   多个柔光渐变色块 + 高斯模糊，缓慢漂移营造高端流动感
   ============================================================ */
.fluid-bg{
  position:absolute;
  inset:0;
  overflow:hidden;
  z-index:0;
  pointer-events:none;
}
.fluid-bg::after{
  content:"";
  position:absolute; inset:0;
  background: radial-gradient(circle at 50% 0%, rgba(255,255,255,0) 0%, var(--bg) 78%);
}
.fluid-blob{
  position:absolute;
  border-radius:50%;
  filter: blur(60px);
  opacity:.55;
  will-change: transform;
  mix-blend-mode: normal;
}
.fluid-blob.b1{
  width:46vw; height:46vw; max-width:680px; max-height:680px;
  top:-14%; left:-10%;
  background: radial-gradient(circle at 30% 30%, var(--azure-2), var(--azure) 60%, transparent 75%);
  animation: drift1 26s ease-in-out infinite alternate;
}
.fluid-blob.b2{
  width:38vw; height:38vw; max-width:560px; max-height:560px;
  top:6%; right:-12%;
  background: radial-gradient(circle at 60% 40%, var(--teal), var(--azure-2) 65%, transparent 78%);
  animation: drift2 32s ease-in-out infinite alternate;
}
.fluid-blob.b3{
  width:42vw; height:42vw; max-width:620px; max-height:620px;
  bottom:-18%; left:18%;
  background: radial-gradient(circle at 50% 50%, var(--violet), var(--azure) 60%, transparent 78%);
  animation: drift3 30s ease-in-out infinite alternate;
}
.fluid-blob.b4{
  width:26vw; height:26vw; max-width:420px; max-height:420px;
  bottom:8%; right:8%;
  background: radial-gradient(circle at 40% 40%, var(--gold), var(--gold-soft) 70%, transparent 80%);
  opacity:.35;
  animation: drift4 24s ease-in-out infinite alternate;
}
.fluid-bg--soft .fluid-blob{ opacity:.18; filter: blur(80px); }

@keyframes drift1{
  0%   { transform: translate(0,0) scale(1) rotate(0deg); }
  50%  { transform: translate(6%, 8%) scale(1.12) rotate(20deg); }
  100% { transform: translate(-4%, 4%) scale(.96) rotate(-10deg); }
}
@keyframes drift2{
  0%   { transform: translate(0,0) scale(1); }
  50%  { transform: translate(-8%, 6%) scale(1.15); }
  100% { transform: translate(4%, -6%) scale(.92); }
}
@keyframes drift3{
  0%   { transform: translate(0,0) scale(1) rotate(0deg); }
  50%  { transform: translate(5%, -8%) scale(1.08) rotate(-15deg); }
  100% { transform: translate(-6%, 2%) scale(1.02) rotate(10deg); }
}
@keyframes drift4{
  0%   { transform: translate(0,0) scale(1); }
  100% { transform: translate(-10%, -12%) scale(1.2); }
}

/* 流体波浪分隔线 */
.wave-divider{
  display:block;
  width:100%;
  line-height:0;
  position:relative;
  z-index:1;
}
.wave-divider svg{ width:100%; height:auto; display:block; }
.wave-divider path{
  animation: waveShift 18s ease-in-out infinite alternate;
  transform-origin: center;
}
@keyframes waveShift{
  0%   { d: path('M0,40 C200,90 400,0 600,40 C800,80 1000,10 1200,50 L1200,120 L0,120 Z'); }
  100% { d: path('M0,60 C220,10 420,90 620,50 C820,20 1020,80 1200,30 L1200,120 L0,120 Z'); }
}

/* ============================================================
   预加载动画
   ============================================================ */
.preloader{
  position:fixed; inset:0; z-index:9999;
  display:flex; align-items:center; justify-content:center;
  background: var(--bg);
  transition: opacity .6s ease, visibility .6s ease;
}
.preloader.is-done{ opacity:0; visibility:hidden; }
.preloader__mark{
  width:64px; height:64px;
  border-radius:50%;
  border: 2px solid var(--line);
  border-top-color: var(--azure);
  border-right-color: var(--teal);
  animation: spin 1s linear infinite;
}
@keyframes spin{ to{ transform: rotate(360deg); } }

/* ============================================================
   导航栏
   ============================================================ */
.navbar{
  position: fixed;
  top:0; left:0; right:0;
  z-index: 1000;
  padding: 22px 0;
  transition: all .35s ease;
}
.navbar.is-scrolled{
  padding: 12px 0;
  background: rgba(255,255,255,.72);
  backdrop-filter: blur(16px) saturate(160%);
  box-shadow: 0 1px 0 var(--line), var(--shadow-sm);
}
.navbar__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 24px;
}
.navbar__logo{
  display:flex;
  align-items:center;
  gap:12px;
}
.navbar__logo img{
  height: 34px;
  width:auto;
  object-fit:contain;
}
.navbar__nav{
  display:flex;
  align-items:center;
  gap: 34px;
}
.navbar__nav a{
  position:relative;
  font-size:15px;
  color: var(--ink-soft);
  font-weight:500;
  letter-spacing:.02em;
  transition: color .25s ease;
}
.navbar__nav a::after{
  content:"";
  position:absolute; left:0; bottom:-8px;
  width:0; height:2px;
  background: linear-gradient(90deg, var(--azure), var(--teal));
  transition: width .3s ease;
}
.navbar__nav a:hover{ color: var(--ink); }
.navbar__nav a:hover::after{ width:100%; }

.navbar__actions{ display:flex; align-items:center; gap:14px; }
.navbar__user{
  display:flex; align-items:center; gap:10px;
  font-size:14px; color: var(--ink-soft);
}
.navbar__user b{ color: var(--ink); font-weight:600; }
.navbar__toggle{
  display:none;
  width:42px; height:42px;
  border-radius: 50%;
  border:1px solid var(--line);
  background: var(--surface);
  align-items:center; justify-content:center;
}
.navbar__toggle span{
  display:block; width:18px; height:1.5px; background: var(--ink);
  position:relative;
}
.navbar__toggle span::before,.navbar__toggle span::after{
  content:""; position:absolute; left:0; width:18px; height:1.5px; background: var(--ink);
}
.navbar__toggle span::before{ top:-6px; }
.navbar__toggle span::after{ top:6px; }

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding: 13px 30px;
  border-radius: 999px;
  font-size: 15px;
  font-weight:600;
  letter-spacing:.04em;
  transition: transform .3s ease, box-shadow .3s ease, background .3s ease, color .3s ease, border-color .3s ease;
  white-space:nowrap;
}
.btn-sm{ padding: 10px 22px; font-size:13.5px; }
.btn-primary{
  color:#fff;
  background: linear-gradient(120deg, var(--azure), var(--violet));
  box-shadow: 0 14px 30px -12px rgba(54,88,245,.55);
}
.btn-primary:hover{ transform: translateY(-2px); box-shadow: 0 18px 36px -12px rgba(54,88,245,.6); }
.btn-ghost{
  color: var(--ink);
  background: var(--surface);
  border:1px solid var(--line);
}
.btn-ghost:hover{ border-color: var(--azure); color: var(--azure); transform: translateY(-2px); }
.btn-gold{
  color:#6b4f1f;
  background: linear-gradient(120deg, #f6e3bd, var(--gold));
  box-shadow: 0 14px 30px -14px rgba(205,164,94,.6);
}
.btn-gold:hover{ transform: translateY(-2px); }
.btn-block{ width:100%; }
.btn-text{
  color: var(--azure);
  font-weight:600;
  display:inline-flex; align-items:center; gap:8px;
}
.btn-text .arrow{ transition: transform .3s ease; }
.btn-text:hover .arrow{ transform: translateX(6px); }

/* ============================================================
   HERO
   ============================================================ */
.hero{
  position:relative;
  min-height: 100vh;
  display:flex;
  align-items:center;
  padding-top: 120px;
  padding-bottom: 80px;
  overflow:hidden;
}
.hero__inner{
  position:relative;
  z-index:2;
  display:grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 60px;
  align-items:center;
}
.hero__tag{
  display:inline-flex; align-items:center; gap:12px;
  padding: 8px 18px 8px 8px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  font-size: 13px;
  color: var(--ink-soft);
  margin-bottom: 28px;
}
.hero__tag span.dot{
  width:26px; height:26px; border-radius:50%;
  background: linear-gradient(135deg, var(--azure), var(--teal));
  display:inline-flex; align-items:center; justify-content:center;
  color:#fff; font-size:12px; font-family: var(--font-accent);
}
.hero h1{
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: .01em;
}
.hero h1 .line2{
  display:block;
  background: linear-gradient(120deg, var(--azure) 10%, var(--violet) 50%, var(--teal) 90%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero__desc{
  margin-top: 26px;
  font-size: 17px;
  color: var(--ink-soft);
  max-width: 540px;
  line-height: 1.95;
}
.hero__actions{
  margin-top: 40px;
  display:flex;
  gap: 16px;
  flex-wrap:wrap;
}
.hero__stats{
  margin-top: 64px;
  display:grid;
  grid-template-columns: repeat(4, auto);
  gap: 36px;
}
.hero__stat-num{
  font-family: var(--font-accent);
  font-size: 34px;
  font-weight:700;
  color: var(--ink);
}
.hero__stat-num span{
  font-size: 16px;
  color: var(--azure);
  margin-left:2px;
}
.hero__stat-label{
  margin-top:6px;
  font-size: 13px;
  color: var(--ink-faint);
  letter-spacing:.05em;
}

/* Hero 右侧视觉卡片 */
.hero__visual{
  position:relative;
  height: 520px;
}
.hero__card{
  position:absolute;
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(255,255,255,.6);
}
.hero__card--main{
  inset: 6% 0 6% 8%;
  display:flex;
  align-items:center;
  justify-content:center;
  background:
    radial-gradient(circle at 30% 20%, rgba(54,88,245,.10), transparent 55%),
    radial-gradient(circle at 80% 80%, rgba(24,201,189,.12), transparent 55%),
    var(--surface);
  padding: 40px;
  animation: floatY 7s ease-in-out infinite;
}
.hero__card--main img{
  width: 78%;
  filter: drop-shadow(0 20px 40px rgba(54,88,245,.18));
}
.hero__card--tag{
  top: 8%; right: -4%;
  padding: 16px 22px;
  display:flex; align-items:center; gap:12px;
  font-size: 13px;
  color: var(--ink-soft);
  animation: floatY 6s ease-in-out infinite reverse;
}
.hero__card--tag b{ color: var(--ink); display:block; font-size:18px; font-family: var(--font-accent); }
.hero__card--tag .pulse{
  width:10px; height:10px; border-radius:50%;
  background: var(--teal);
  box-shadow: 0 0 0 0 rgba(24,201,189,.6);
  animation: pulse 2s infinite;
}
.hero__card--bottom{
  bottom: 6%; left: -6%;
  padding: 18px 22px;
  font-size: 13px;
  color: var(--ink-soft);
  animation: floatY 8s ease-in-out infinite;
}
.hero__card--bottom b{ color: var(--ink); font-size: 22px; font-family: var(--font-accent); display:block; }

@keyframes floatY{
  0%,100%{ transform: translateY(0); }
  50%{ transform: translateY(-14px); }
}
@keyframes pulse{
  0%{ box-shadow: 0 0 0 0 rgba(24,201,189,.55); }
  70%{ box-shadow: 0 0 0 10px rgba(24,201,189,0); }
  100%{ box-shadow: 0 0 0 0 rgba(24,201,189,0); }
}

.scroll-cue{
  position:absolute;
  bottom: 36px; left:50%;
  transform: translateX(-50%);
  display:flex; flex-direction:column; align-items:center; gap:10px;
  font-size:12px; letter-spacing:.2em; color: var(--ink-faint);
  z-index:2;
}
.scroll-cue__line{
  width:1px; height:46px;
  background: linear-gradient(180deg, var(--azure), transparent);
  position:relative;
  overflow:hidden;
}
.scroll-cue__line::after{
  content:"";
  position:absolute; left:0; top:-100%;
  width:100%; height:100%;
  background: linear-gradient(180deg, transparent, var(--teal));
  animation: scrollLine 2.4s ease-in-out infinite;
}
@keyframes scrollLine{
  0%{ top:-100%; } 100%{ top:100%; }
}

/* ============================================================
   关于我们
   ============================================================ */
.about__grid{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 70px;
  align-items:center;
}
.about__copy p{ color: var(--ink-soft); margin-bottom: 16px; }
.about__copy p:last-child{ margin-bottom:0; }
.about__highlight{
  margin-top: 28px;
  display:flex; gap:14px; flex-wrap:wrap;
}
.tagchip{
  padding: 8px 16px;
  border-radius: 999px;
  border:1px solid var(--line);
  background: var(--surface);
  font-size: 13px;
  color: var(--ink-soft);
}
.about__visual{
  position:relative;
  display:flex; align-items:center; justify-content:center;
  padding: 60px;
}
.about__visual::before{
  content:"";
  position:absolute; inset: 8%;
  border-radius: 50%;
  background: conic-gradient(from 0deg, var(--azure), var(--violet), var(--teal), var(--azure));
  filter: blur(60px);
  opacity:.25;
  animation: spinSlow 26s linear infinite;
}
@keyframes spinSlow{ to{ transform: rotate(360deg); } }
.about__logo-card{
  position:relative;
  z-index:1;
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 56px;
  width:100%;
  max-width: 380px;
  aspect-ratio: 1/1;
  display:flex; align-items:center; justify-content:center;
}
.about__logo-card img{ width:72%; }

/* 数据统计 */
.stats{
  margin-top: 90px;
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border-radius: var(--radius-md);
  overflow:hidden;
  box-shadow: var(--shadow-sm);
}
.stat-item{
  background: var(--surface);
  padding: 36px 24px;
  text-align:center;
}
.stat-item .num{
  font-family: var(--font-accent);
  font-size: 40px;
  font-weight:700;
  background: linear-gradient(120deg, var(--azure), var(--violet));
  -webkit-background-clip:text; background-clip:text; color:transparent;
}
.stat-item .num span{ font-size:20px; }
.stat-item .label{ margin-top:8px; font-size: 13px; color: var(--ink-soft); letter-spacing:.05em; }

/* ============================================================
   创始人介绍
   ============================================================ */
.founder{
  position:relative;
}
.founder__grid{
  display:grid;
  grid-template-columns: .85fr 1.15fr;
  gap: 70px;
  align-items:center;
}
.founder__portrait{
  position:relative;
  display:flex; align-items:center; justify-content:center;
}
.founder__ring{
  position:relative;
  width: 320px; height: 320px;
  border-radius:50%;
  display:flex; align-items:center; justify-content:center;
  background: var(--surface);
  box-shadow: var(--shadow-lg);
}
.founder__ring::before{
  content:"";
  position:absolute; inset:-14px;
  border-radius:50%;
  border: 1.5px dashed var(--gold);
  opacity:.5;
  animation: spinSlow 40s linear infinite;
}
.founder__ring::after{
  content:"";
  position:absolute; inset:-30px;
  border-radius:50%;
  background: conic-gradient(from 90deg, var(--azure), var(--teal), var(--violet), var(--azure));
  filter: blur(40px);
  opacity:.22;
  animation: spinSlow 30s linear infinite reverse;
}
.founder__avatar{
  position:relative;
  z-index:1;
  width: 248px; height: 248px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--azure), var(--violet) 60%, var(--teal));
  display:flex; align-items:center; justify-content:center;
  color:#fff;
  font-family: var(--font-display);
  font-size: 96px;
  font-weight:700;
  letter-spacing:.1em;
  box-shadow: inset 0 0 0 6px rgba(255,255,255,.25);
}
.founder__badge{
  position:absolute;
  bottom: 14px; right: -6px;
  background: var(--surface);
  border-radius: 999px;
  box-shadow: var(--shadow-md);
  padding: 10px 18px;
  font-size: 13px;
  color: var(--ink-soft);
  display:flex; align-items:center; gap:8px;
}
.founder__badge b{ color: var(--gold); font-family: var(--font-accent); }

.founder__name{
  font-size: 38px;
  font-weight:700;
}
.founder__role{
  margin-top:8px;
  font-family: var(--font-accent);
  font-style: italic;
  color: var(--azure);
  letter-spacing:.06em;
  font-size: 16px;
}
.founder__bio p{
  margin-top: 18px;
  color: var(--ink-soft);
}
.founder__quote{
  margin-top: 30px;
  padding: 24px 28px;
  border-radius: var(--radius-md);
  background: var(--surface);
  border-left: 3px solid var(--gold);
  box-shadow: var(--shadow-sm);
  font-family: var(--font-display);
  font-size: 18px;
  color: var(--ink);
  position:relative;
}
.founder__quote::before{
  content:"“";
  font-family: var(--font-accent);
  font-size: 60px;
  color: var(--gold-soft);
  position:absolute; top:-6px; left:14px;
  line-height:1;
}
.founder__sign{
  margin-top: 28px;
  display:flex; align-items:center; gap:18px;
}
.founder__sign .mark{
  font-family: var(--font-accent);
  font-size: 30px;
  font-style: italic;
  color: var(--ink);
  border-bottom: 2px solid var(--gold);
  padding-bottom:4px;
}
.founder__sign .info{ font-size:13px; color: var(--ink-faint); line-height:1.6; }

/* ============================================================
   核心业务
   ============================================================ */
.services__grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.service-card{
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: 36px 30px;
  border: 1px solid var(--line);
  transition: transform .35s ease, box-shadow .35s ease, border-color .35s ease;
  position:relative;
  overflow:hidden;
}
.service-card::before{
  content:"";
  position:absolute; inset:0;
  background: linear-gradient(135deg, rgba(54,88,245,.06), rgba(24,201,189,.06));
  opacity:0;
  transition: opacity .35s ease;
}
.service-card:hover{
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.service-card:hover::before{ opacity:1; }
.service-card__icon{
  width: 56px; height:56px;
  border-radius: 16px;
  display:flex; align-items:center; justify-content:center;
  background: linear-gradient(135deg, var(--azure), var(--violet));
  color:#fff;
  margin-bottom: 24px;
  position:relative; z-index:1;
}
.service-card__icon svg{ width:26px; height:26px; }
.service-card h3{ font-size:20px; font-weight:700; position:relative; z-index:1; }
.service-card p{
  margin-top: 12px; color: var(--ink-soft); font-size: 14.5px; position:relative; z-index:1;
}
.service-card__num{
  position:absolute; top:28px; right:30px;
  font-family: var(--font-accent);
  font-size: 38px;
  color: var(--bg-soft);
  font-weight:700;
  z-index:0;
}

/* ============================================================
   技术实力
   ============================================================ */
.tech__grid{
  display:grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.tech-card{
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: 30px 32px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}
.tech-card h4{
  font-size: 16px;
  display:flex; align-items:center; gap:12px;
  margin-bottom: 18px;
}
.tech-card h4 .dot{
  width:10px; height:10px; border-radius:50%;
  background: linear-gradient(135deg, var(--azure), var(--teal));
}
.tech-pills{ display:flex; flex-wrap:wrap; gap:10px; }
.tech-pill{
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 13px;
  color: var(--ink-soft);
  background: var(--bg-soft);
  border: 1px solid var(--line);
  transition: all .25s ease;
}
.tech-pill:hover{
  color:#fff;
  background: linear-gradient(120deg, var(--azure), var(--violet));
  border-color: transparent;
  transform: translateY(-2px);
}

/* ============================================================
   发展历程 / 时间线
   ============================================================ */
.timeline{
  position:relative;
  max-width: 900px;
  margin: 0 auto;
}
.timeline::before{
  content:"";
  position:absolute;
  left: 50%; top:0; bottom:0;
  width:1px;
  background: linear-gradient(180deg, transparent, var(--line) 6%, var(--line) 94%, transparent);
  transform: translateX(-50%);
}
.timeline-item{
  position:relative;
  width: 50%;
  padding: 0 50px 60px;
}
.timeline-item:nth-child(odd){ left:0; text-align:right; }
.timeline-item:nth-child(even){ left:50%; text-align:left; }
.timeline-item::before{
  content:"";
  position:absolute;
  top: 4px;
  width: 14px; height:14px;
  border-radius:50%;
  background: var(--surface);
  border: 3px solid var(--azure);
  box-shadow: 0 0 0 6px var(--bg);
}
.timeline-item:nth-child(odd)::before{ right:-7px; }
.timeline-item:nth-child(even)::before{ left:-7px; }
.timeline-item .year{
  font-family: var(--font-accent);
  font-size: 28px;
  font-weight:700;
  color: var(--azure);
}
.timeline-item h4{ font-size:17px; margin-top:6px; }
.timeline-item p{ margin-top:8px; color: var(--ink-soft); font-size:14.5px; }

/* ============================================================
   联系我们
   ============================================================ */
.contact__grid{
  display:grid;
  grid-template-columns: 1fr 1.05fr;
  gap: 60px;
}
.contact-info-list{ display:flex; flex-direction:column; gap:18px; margin-bottom: 36px; }
.contact-info-item{
  display:flex; gap:18px; align-items:flex-start;
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: 22px 24px;
  border: 1px solid var(--line);
  transition: box-shadow .3s ease, transform .3s ease;
}
.contact-info-item:hover{ box-shadow: var(--shadow-md); transform: translateY(-3px); }
.contact-info-item .icon{
  width: 46px; height:46px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--azure), var(--teal));
  color:#fff;
  display:flex; align-items:center; justify-content:center;
  flex-shrink:0;
}
.contact-info-item .icon svg{ width:22px; height:22px; }
.contact-info-item h4{ font-size:15px; color: var(--ink-faint); font-weight:500; letter-spacing:.05em; }
.contact-info-item p{ margin-top:4px; font-size:17px; font-weight:600; color: var(--ink); }
.contact-info-item p a{ transition: color .25s ease; }
.contact-info-item p a:hover{ color: var(--azure); }

.contact-map{
  border-radius: var(--radius-md);
  overflow:hidden;
  height: 220px;
  border: 1px solid var(--line);
  position:relative;
}
.contact-map iframe{ width:100%; height:100%; border:0; filter: grayscale(.15) contrast(1.05); }

.contact-form{
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 46px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--line);
}
.contact-form h3{ font-size:24px; margin-bottom:8px; }
.contact-form .sub{ color: var(--ink-soft); font-size:14px; margin-bottom: 30px; }
.form-row{ margin-bottom: 20px; }
.form-row label{
  display:block; font-size:13px; color: var(--ink-soft); margin-bottom:8px; letter-spacing:.04em;
}
.form-row input, .form-row textarea{
  width:100%;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: var(--bg-soft);
  font-size: 14.5px;
  color: var(--ink);
  transition: border-color .25s ease, background .25s ease, box-shadow .25s ease;
}
.form-row input:focus, .form-row textarea:focus{
  outline:none;
  border-color: var(--azure);
  background: var(--surface);
  box-shadow: 0 0 0 4px rgba(54,88,245,.1);
}
.form-row textarea{ resize: vertical; min-height: 120px; }
.form-grid2{ display:grid; grid-template-columns: 1fr 1fr; gap:20px; }

.alert{
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  margin-bottom: 22px;
  border: 1px solid transparent;
}
.alert-success{ background:#eaf8f1; color:#177a4c; border-color:#bfe9d3; }
.alert-error{ background:#fdecec; color:#bb3434; border-color:#f7cccc; }

/* ============================================================
   页脚
   ============================================================ */
.footer{
  background: var(--ink);
  color: rgba(255,255,255,.7);
  position:relative;
  overflow:hidden;
}
.footer::before{
  content:"";
  position:absolute; inset:0;
  background:
    radial-gradient(circle at 15% 20%, rgba(54,88,245,.35), transparent 45%),
    radial-gradient(circle at 85% 80%, rgba(24,201,189,.25), transparent 45%);
  opacity:.5;
}
.footer__inner{ position:relative; z-index:1; padding: 80px 0 30px; }
.footer__top{
  display:grid;
  grid-template-columns: 1.3fr 1fr 1fr 1.2fr;
  gap: 50px;
}
.footer__logo{
  background: #fff;
  display:inline-flex;
  padding: 14px 22px;
  border-radius: 14px;
  margin-bottom: 22px;
}
.footer__logo img{ height: 30px; }
.footer__brand p{ font-size:14px; line-height:1.9; color: rgba(255,255,255,.55); }
.footer h5{
  color:#fff; font-size:15px; letter-spacing:.08em; margin-bottom: 22px;
  font-family: var(--font-display);
}
.footer__links li{ margin-bottom: 12px; }
.footer__links a{ font-size:14px; color: rgba(255,255,255,.55); transition: color .25s ease, padding-left .25s ease; }
.footer__links a:hover{ color:#fff; padding-left:4px; }
.footer__contact li{ font-size:14px; margin-bottom:14px; color: rgba(255,255,255,.55); display:flex; gap:10px; }
.footer__contact li b{ color:#fff; font-weight:500; }
.footer__bottom{
  margin-top: 60px;
  padding-top: 28px;
  border-top: 1px solid rgba(255,255,255,.1);
  display:flex; justify-content:space-between; align-items:center;
  font-size: 13px;
  color: rgba(255,255,255,.4);
  flex-wrap:wrap; gap:12px;
}

/* 返回顶部 */
.to-top{
  position:fixed;
  right: 28px; bottom: 28px;
  width: 48px; height:48px;
  border-radius:50%;
  background: var(--surface);
  border:1px solid var(--line);
  box-shadow: var(--shadow-md);
  display:flex; align-items:center; justify-content:center;
  z-index: 900;
  opacity:0; visibility:hidden; transform: translateY(10px);
  transition: all .3s ease;
}
.to-top.show{ opacity:1; visibility:visible; transform: translateY(0); }
.to-top:hover{ background: linear-gradient(135deg, var(--azure), var(--violet)); color:#fff; }

/* ============================================================
   滚动揭示动画
   ============================================================ */
.reveal{
  opacity:0;
  transform: translateY(36px);
  transition: opacity .9s cubic-bezier(.16,1,.3,1), transform .9s cubic-bezier(.16,1,.3,1);
}
.reveal.is-visible{ opacity:1; transform: translateY(0); }
.reveal-delay-1{ transition-delay: .08s; }
.reveal-delay-2{ transition-delay: .16s; }
.reveal-delay-3{ transition-delay: .24s; }
.reveal-delay-4{ transition-delay: .32s; }
.reveal-delay-5{ transition-delay: .4s; }
.reveal-delay-6{ transition-delay: .48s; }

/* ============================================================
   认证页（登录 / 注册）
   ============================================================ */
.auth-page{
  min-height: 100vh;
  display:flex;
  align-items:center;
  justify-content:center;
  position:relative;
  padding: 120px 20px 60px;
  overflow:hidden;
}
.auth-card{
  position:relative; z-index:1;
  width:100%; max-width: 460px;
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 48px 44px;
  border: 1px solid var(--line);
}
.auth-card__logo{ display:flex; justify-content:center; margin-bottom: 26px; }
.auth-card__logo img{ height: 40px; }
.auth-card h2{
  font-size: 26px; text-align:center; font-weight:700;
}
.auth-card .sub{
  text-align:center; color: var(--ink-soft); font-size: 14px; margin-top:8px; margin-bottom: 32px;
}
.auth-card .foot{
  margin-top: 24px; text-align:center; font-size: 14px; color: var(--ink-soft);
}
.auth-card .foot a{ color: var(--azure); font-weight:600; }
.auth-back{
  position:fixed; top: 28px; left:28px; z-index:5;
  display:inline-flex; align-items:center; gap:8px;
  font-size:14px; color: var(--ink-soft);
  background: var(--surface);
  padding: 10px 18px;
  border-radius:999px;
  border:1px solid var(--line);
  box-shadow: var(--shadow-sm);
}
.auth-back:hover{ color: var(--azure); }

/* ============================================================
   控制台 / 用户中心
   ============================================================ */
.dash{
  min-height: 100vh;
  padding-top: 110px;
  padding-bottom: 80px;
  position:relative;
}
.dash__header{
  display:flex; justify-content:space-between; align-items:flex-end; gap:20px; flex-wrap:wrap;
  margin-bottom: 40px;
}
.dash__header h1{ font-size: 32px; }
.dash__header p{ color: var(--ink-soft); margin-top:8px; }
.dash__grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.dash-card{
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: 30px;
  border:1px solid var(--line);
  box-shadow: var(--shadow-sm);
}
.dash-card h4{ font-size:14px; color: var(--ink-faint); letter-spacing:.06em; margin-bottom: 12px; }
.dash-card .val{ font-family: var(--font-accent); font-size: 28px; font-weight:700; }
.dash-card .val.small{ font-size: 18px; font-family: var(--font-body); font-weight:600; }
.profile-table{ width:100%; border-collapse: collapse; margin-top:20px; }
.profile-table th, .profile-table td{
  text-align:left; padding: 14px 18px; border-bottom:1px solid var(--line); font-size:14.5px;
}
.profile-table th{ width: 160px; color: var(--ink-faint); font-weight:500; }
.profile-table td{ color: var(--ink); font-weight:500; }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1024px){
  .hero__inner{ grid-template-columns: 1fr; gap: 40px; }
  .hero__visual{ height: 380px; order:-1; }
  .about__grid, .founder__grid, .contact__grid{ grid-template-columns: 1fr; gap: 40px; }
  .founder__portrait{ order:-1; }
  .services__grid{ grid-template-columns: repeat(2, 1fr); }
  .tech__grid{ grid-template-columns: 1fr; }
  .footer__top{ grid-template-columns: 1fr 1fr; }
  .dash__grid{ grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px){
  .navbar__nav, .navbar__actions .btn-ghost{ display:none; }
  .navbar__toggle{ display:flex; }
  .hero__stats{ grid-template-columns: repeat(2,1fr); gap:24px; }
  .stats{ grid-template-columns: repeat(2,1fr); }
  .services__grid{ grid-template-columns: 1fr; }
  .form-grid2{ grid-template-columns: 1fr; }
  .section{ padding: 80px 0; }
  .timeline::before{ left: 14px; }
  .timeline-item, .timeline-item:nth-child(even){ width:100%; left:0; text-align:left; padding-left: 46px; padding-right:0; }
  .timeline-item::before, .timeline-item:nth-child(even)::before{ left: 7px; }
  .footer__top{ grid-template-columns: 1fr; gap:36px; }
  .dash__grid{ grid-template-columns: 1fr; }
  .auth-card{ padding: 36px 26px; }
}

/* 移动端导航展开面板 */
.navbar__mobile{
  display:none;
  position:absolute; top:100%; left:0; right:0;
  background: var(--surface);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 16px 28px 26px;
  flex-direction:column; gap:14px;
}
.navbar__mobile.is-open{ display:flex; }
.navbar__mobile a{ font-size:15px; color: var(--ink-soft); padding:6px 0; }
.navbar__mobile .btns{ display:flex; gap:12px; margin-top:8px; }

/* 减少动态偏好设置 */
@media (prefers-reduced-motion: reduce){
  *{ animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
}