/* ==========================================================================
   宇见未来 AI 工坊 — www.yjwl.work
   暗调质感设计系统 v2
   基底：深褐 / 墨绿  |  强调：琥珀 / 铜金渐变
   ========================================================================== */

/* ---------------------------------------------------------------- Tokens */
:root {
  /* 基底 — 深褐系（带暖调，不用纯黑） */
  --bg-0: #0D0B09;          /* 最深 */
  --bg-1: #14110E;          /* 主背景 */
  --bg-2: #1C1815;          /* 卡片底 */
  --bg-3: #24201B;          /* 卡片 hover */

  /* 墨绿 — 次要色温，用于部分 section 的背景偏移 */
  --bg-green: #101512;
  --bg-green-2: #161D19;

  /* 文字 */
  --ink-1: #F5F0E8;         /* 主文字 — 暖白 */
  --ink-2: #B8AE9E;         /* 次要 */
  --ink-3: #7D7466;         /* 弱化 */
  --ink-4: #4A443C;         /* 极弱 / 分隔 */

  /* 强调 — 琥珀 → 铜金 */
  --amber:     #E8A34D;
  --amber-hi:  #FFC978;
  --gold:      #C89B3C;
  --gold-hi:   #E8C87A;
  --bronze:    #A8703A;

  /* 辅助强调 — 低饱和，用于分类标识 */
  --jade:      #6FA88C;      /* 墨绿偏青 */
  --slate:     #7C8FA6;      /* 冷灰蓝 */
  --wine:      #A8637A;      /* 暗玫瑰 */

  /* 渐变 */
  --grad-amber:  linear-gradient(135deg, #FFC978 0%, #E8A34D 45%, #C89B3C 100%);
  --grad-bronze: linear-gradient(135deg, #E8C87A 0%, #A8703A 100%);
  --grad-jade:   linear-gradient(135deg, #8FC7AB 0%, #4E8870 100%);
  --grad-dark:   linear-gradient(180deg, #14110E 0%, #0D0B09 100%);

  /* 线条 */
  --line:    rgba(232, 163, 77, 0.14);
  --line-2:  rgba(232, 163, 77, 0.28);
  --line-hi: rgba(232, 163, 77, 0.55);

  /* 字体 */
  --f-serif: 'Fraunces', 'Noto Serif SC', Georgia, serif;
  --f-sans:  -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
             'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  --f-mono:  'JetBrains Mono', 'SF Mono', Consolas, monospace;

  /* 间距 / 圆角 */
  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 22px;
  --r-xl: 32px;

  --wrap: 1200px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ---------------------------------------------------------------- Reset */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg-1);
  color: var(--ink-1);
  font-family: var(--f-sans);
  font-size: 16px;
  line-height: 1.7;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, p { margin: 0; }

::selection { background: rgba(232, 163, 77, 0.28); color: #fff; }

/* ---------------------------------------------------------------- Base */
.wrap {
  width: min(100% - 48px, var(--wrap));
  margin-inline: auto;
}

.mono {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 24px;
}
.eyebrow::before {
  content: '';
  width: 28px;
  height: 1px;
  background: var(--grad-amber);
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------------------------------------------------------------- Nav */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px max(24px, calc((100vw - var(--wrap)) / 2));
  background: color-mix(in srgb, var(--bg-0) 82%, transparent);
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  border-bottom: 1px solid transparent;
  transition: border-color .4s var(--ease), background .4s var(--ease);
}
.nav.is-stuck {
  border-bottom-color: var(--line);
  background: color-mix(in srgb, var(--bg-0) 94%, transparent);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--f-serif);
  font-size: 17px;
  font-weight: 500;
  letter-spacing: 0.02em;
}
.nav-brand img {
  width: 34px; height: 34px;
  border-radius: 9px;
  object-fit: contain;
  background: var(--bg-2);
  box-shadow: 0 0 0 1px var(--line), 0 4px 16px rgba(232,163,77,.1);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 30px;
}
.nav-links a {
  position: relative;
  font-size: 13.5px;
  color: var(--ink-2);
  padding: 6px 0;
  transition: color .3s var(--ease);
}
.nav-links a::after {
  content: '';
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 1px;
  background: var(--grad-amber);
  transition: width .35s var(--ease);
}
.nav-links a:hover { color: var(--ink-1); }
.nav-links a:hover::after { width: 100%; }

.nav-cta {
  padding: 9px 20px !important;
  border-radius: 999px;
  font-size: 13px !important;
  color: var(--bg-0) !important;
  background: var(--grad-amber);
  font-weight: 600;
  box-shadow: 0 4px 20px rgba(232,163,77,.22);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.nav-cta::after { display: none; }
.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(232,163,77,.34);
}

/* 汉堡按钮：桌面隐藏 */
.nav-toggle {
  display: none;
  width: 42px; height: 42px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border-radius: 11px;
  border: 1px solid var(--line-2);
  background: var(--bg-2);
  transition: border-color .3s var(--ease), background .3s var(--ease);
}
.nav-toggle:hover { border-color: var(--line-hi); background: var(--bg-3); }
.nav-toggle span {
  display: block;
  width: 17px; height: 1.5px;
  border-radius: 2px;
  background: var(--ink-1);
  transition: transform .38s var(--ease), opacity .28s var(--ease);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ---------------------------------------------------------------- Hero */
.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  place-items: center;
  padding: 140px 0 100px;
  overflow: hidden;
  background: var(--grad-dark);
}

/* 背景光晕 — 双层径向渐变 */
.hero::before,
.hero::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
}
.hero::before {
  width: 620px; height: 620px;
  top: -140px; right: -100px;
  background: radial-gradient(circle, rgba(232,163,77,.24) 0%, transparent 68%);
  animation: drift-a 22s var(--ease) infinite alternate;
}
.hero::after {
  width: 520px; height: 520px;
  bottom: -160px; left: -80px;
  background: radial-gradient(circle, rgba(111,168,140,.16) 0%, transparent 68%);
  animation: drift-b 26s var(--ease) infinite alternate;
}
@keyframes drift-a {
  from { transform: translate(0,0) scale(1); }
  to   { transform: translate(-70px, 60px) scale(1.14); }
}
@keyframes drift-b {
  from { transform: translate(0,0) scale(1.06); }
  to   { transform: translate(80px,-50px) scale(1); }
}

.hero-inner {
  position: relative;
  z-index: 2;
  width: min(100% - 48px, 980px);
  margin-inline: auto;
  text-align: center;
}

.hero-title {
  font-family: var(--f-serif);
  font-size: clamp(42px, 7.2vw, 88px);
  font-weight: 400;
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin-bottom: 30px;
}
/* 渐变强调词 */
.hero-title em {
  font-style: normal;
  background: var(--grad-amber);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  padding-right: .08em;
}

.hero-lede {
  max-width: 620px;
  margin: 0 auto 48px;
  font-size: clamp(15px, 1.6vw, 17px);
  color: var(--ink-2);
  line-height: 1.85;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 15px 32px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  color: var(--bg-0);
  background: var(--grad-amber);
  box-shadow: 0 6px 28px rgba(232,163,77,.28);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}
.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(232,163,77,.42);
}
.btn-primary svg { transition: transform .35s var(--ease); }
.btn-primary:hover svg { transform: translateX(4px); }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 15px 30px;
  border-radius: 999px;
  font-size: 15px;
  color: var(--ink-1);
  border: 1px solid var(--line-2);
  transition: border-color .35s var(--ease), background .35s var(--ease);
}
.btn-ghost:hover {
  border-color: var(--line-hi);
  background: rgba(232,163,77,.06);
}

/* Hero 交付物 chips */
.hero-chips {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 64px;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 999px;
  font-family: var(--f-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--ink-2);
  background: rgba(255,255,255,.02);
  border: 1px solid var(--line);
  transition: border-color .35s var(--ease), color .35s var(--ease), transform .35s var(--ease);
}
.chip:hover {
  border-color: var(--line-hi);
  color: var(--ink-1);
  transform: translateY(-2px);
}
.chip i {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 8px rgba(232,163,77,.6);
}

/* Hero 底部滚动提示 */
.scroll-hint {
  position: absolute;
  bottom: 34px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--ink-4);
  z-index: 2;
}
.scroll-hint span {
  width: 1px; height: 46px;
  background: linear-gradient(180deg, var(--line-hi), transparent);
  animation: drop 2.4s var(--ease) infinite;
}
@keyframes drop {
  0%, 100% { opacity: .25; transform: scaleY(.55); transform-origin: top; }
  50%      { opacity: 1;   transform: scaleY(1);   transform-origin: top; }
}

/* ---------------------------------------------------------------- Section */
.section {
  position: relative;
  padding: clamp(90px, 12vw, 160px) 0;
  overflow: hidden;
}
/* 锚点直达时不顶到固定导航下面 */
.section, .contact, .hero { scroll-margin-top: 88px; }

/* section 背景光晕 */
.section::before {
  content: '';
  position: absolute;
  width: 560px; height: 560px;
  border-radius: 50%;
  filter: blur(130px);
  pointer-events: none;
  opacity: .5;
}
.section[data-glow="amber"]::before {
  top: -180px; left: -140px;
  background: radial-gradient(circle, rgba(232,163,77,.14) 0%, transparent 70%);
}
.section[data-glow="jade"]::before {
  top: 20%; right: -160px;
  background: radial-gradient(circle, rgba(111,168,140,.13) 0%, transparent 70%);
}
.section[data-glow="bronze"]::before {
  bottom: -200px; left: 20%;
  background: radial-gradient(circle, rgba(200,155,60,.12) 0%, transparent 70%);
}
.section[data-glow="wine"]::before {
  top: 10%; left: -180px;
  background: radial-gradient(circle, rgba(168,99,122,.11) 0%, transparent 70%);
}

/* 深色变体 section */
.section--deep {
  background: var(--bg-green);
}
.section--deep::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent, rgba(13,11,9,.6), transparent);
  pointer-events: none;
}
.section-inner { position: relative; z-index: 2; }

.sec-head {
  display: grid;
  gap: 20px;
  margin-bottom: clamp(48px, 6vw, 80px);
  max-width: 780px;
}

.sec-title {
  font-family: var(--f-serif);
  font-size: clamp(28px, 4.2vw, 48px);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.015em;
}
.sec-title em {
  font-style: normal;
  background: var(--grad-amber);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.sec-lede {
  font-size: 16px;
  color: var(--ink-2);
  line-height: 1.85;
  max-width: 620px;
}

/* 大号渐变数字 */
.sec-num {
  font-family: var(--f-serif);
  font-size: clamp(72px, 11vw, 148px);
  font-weight: 300;
  line-height: .82;
  letter-spacing: -0.05em;
  background: linear-gradient(160deg, rgba(232,163,77,.22) 0%, rgba(232,163,77,0) 72%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 24px;
  display: block;
}

/* ---------------------------------------------------------------- Why (3 论点) */
.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.why-card {
  position: relative;
  padding: 34px 30px;
  border-radius: var(--r-lg);
  background: linear-gradient(165deg, rgba(255,255,255,.032), rgba(255,255,255,.008));
  border: 1px solid var(--line);
  overflow: hidden;
  transition: transform .5s var(--ease), border-color .5s var(--ease);
}
.why-card::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: var(--grad-amber);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity .5s var(--ease);
}
.why-card:hover {
  transform: translateY(-6px);
  border-color: transparent;
}
.why-card:hover::before { opacity: 1; }

.why-idx {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--amber);
  margin-bottom: 20px;
}
.why-title {
  font-family: var(--f-serif);
  font-size: 21px;
  font-weight: 400;
  line-height: 1.45;
  margin-bottom: 14px;
}
.why-body {
  font-size: 14.5px;
  color: var(--ink-2);
  line-height: 1.8;
}

/* ---------------------------------------------------------------- Services (3 大件) */
.svc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 22px;
}

.svc-card {
  --accent: var(--amber);
  position: relative;
  padding: 40px 34px 36px;
  border-radius: var(--r-xl);
  background: var(--bg-2);
  border: 1px solid var(--line);
  overflow: hidden;
  transition: transform .55s var(--ease), box-shadow .55s var(--ease);
}
.svc-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--grad-amber);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .6s var(--ease);
}
.svc-card[data-accent="jade"]::before  { background: var(--grad-jade); }
.svc-card[data-accent="bronze"]::before { background: var(--grad-bronze); }
.svc-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 24px 60px rgba(0,0,0,.5);
}
.svc-card:hover::before { transform: scaleX(1); }

.svc-icon {
  width: 52px; height: 52px;
  display: grid;
  place-items: center;
  border-radius: 15px;
  margin-bottom: 26px;
  background: linear-gradient(140deg, rgba(232,163,77,.16), rgba(232,163,77,.04));
  border: 1px solid var(--line-2);
  color: var(--amber);
}
.svc-card[data-accent="jade"] .svc-icon {
  background: linear-gradient(140deg, rgba(143,199,171,.16), rgba(143,199,171,.04));
  border-color: rgba(143,199,171,.28);
  color: var(--jade);
}
.svc-card[data-accent="bronze"] .svc-icon {
  background: linear-gradient(140deg, rgba(232,200,122,.16), rgba(168,112,58,.05));
  border-color: rgba(232,200,122,.28);
  color: var(--gold-hi);
}

.svc-name {
  font-family: var(--f-serif);
  font-size: 26px;
  font-weight: 400;
  margin-bottom: 8px;
}
.svc-name span {
  display: block;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--ink-3);
  margin-bottom: 10px;
  text-transform: uppercase;
}
.svc-body {
  font-size: 14.5px;
  color: var(--ink-2);
  line-height: 1.82;
}

/* 递进指示条 */
.svc-prog {
  display: flex;
  gap: 4px;
  margin-top: 26px;
}
.svc-prog i {
  flex: 1;
  height: 3px;
  border-radius: 2px;
  background: var(--ink-4);
  transition: background .5s var(--ease);
}
.svc-card[data-step="1"] .svc-prog i:nth-child(1) { background: var(--amber); }
.svc-card[data-step="2"] .svc-prog i:nth-child(-n+2) { background: var(--jade); }
.svc-card[data-step="3"] .svc-prog i { background: var(--gold); }

/* ---------------------------------------------------------------- Scenarios (紧凑网格 + hover) */
.scn-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 32px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}

.scn-tabs { display: flex; gap: 8px; }
.scn-tab {
  padding: 9px 20px;
  border-radius: 999px;
  font-size: 13.5px;
  color: var(--ink-3);
  border: 1px solid transparent;
  transition: all .35s var(--ease);
}
.scn-tab:hover { color: var(--ink-1); }
.scn-tab[aria-selected="true"] {
  color: var(--bg-0);
  background: var(--grad-amber);
  font-weight: 600;
  box-shadow: 0 4px 18px rgba(232,163,77,.24);
}

.scn-count {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--ink-4);
}

/* 网格 */
.scn-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(168px, 1fr));
  gap: 12px;
}

.scn {
  position: relative;
  min-height: 154px;
  border-radius: var(--r-md);
  background: var(--bg-2);
  border: 1px solid var(--line);
  overflow: hidden;
  cursor: pointer;
  transition: transform .42s var(--ease), border-color .42s var(--ease),
              box-shadow .42s var(--ease), background .42s var(--ease);
}
.scn:hover, .scn.is-open {
  transform: translateY(-4px);
  background: var(--bg-3);
  border-color: var(--line-hi);
  box-shadow: 0 14px 36px rgba(0,0,0,.46);
}

/* hover 时的渐变描边 */
.scn::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: var(--grad-amber);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity .42s var(--ease);
  pointer-events: none;
}
.scn:hover::after, .scn.is-open::after { opacity: 1; }

.scn[data-type="jade"]::after   { background: var(--grad-jade); }
.scn[data-type="slate"]::after  { background: linear-gradient(135deg, #A8BDD1 0%, #5E7186 100%); }
.scn[data-type="wine"]::after   { background: linear-gradient(135deg, #D490AC 0%, #7E4358 100%); }

/* 展开态：覆盖式淡入，不改变卡片高度，避免整行跳动 */
.scn-face {
  padding: 22px 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-items: flex-start;
  transition: opacity .4s var(--ease), transform .5s var(--ease);
}
.scn:hover .scn-face, .scn.is-open .scn-face {
  opacity: 0;
  transform: translateY(-8px);
}

.scn-icon {
  width: 34px; height: 34px;
  color: var(--amber);
  opacity: .9;
  transition: color .42s var(--ease), transform .42s var(--ease);
}
.scn[data-type="jade"] .scn-icon  { color: var(--jade); }
.scn[data-type="slate"] .scn-icon { color: var(--slate); }
.scn[data-type="wine"] .scn-icon  { color: var(--wine); }
.scn:hover .scn-icon { transform: scale(1.1); }

.scn-name {
  font-size: 15px;
  font-weight: 500;
  line-height: 1.45;
  color: var(--ink-1);
}

.scn-kind {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 5px;
  font-family: var(--f-mono);
  font-size: 9.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
  background: rgba(255,255,255,.04);
  border: 1px solid var(--line);
}
.scn[data-type="jade"] .scn-kind  { color: var(--jade);  border-color: rgba(143,199,171,.24); }
.scn[data-type="slate"] .scn-kind { color: var(--slate); border-color: rgba(168,189,209,.24); }
.scn[data-type="wine"] .scn-kind  { color: var(--wine);  border-color: rgba(212,144,172,.24); }

/* 展开态 */
.scn-detail {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  padding: 20px 18px;
  background: var(--bg-3);
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition: opacity .4s var(--ease), transform .5s var(--ease);
}
.scn:hover .scn-detail, .scn.is-open .scn-detail {
  opacity: 1;
  transform: none;
}
.scn-detail p {
  font-size: 13px;
  color: var(--ink-2);
  line-height: 1.72;
}

/* ---------------------------------------------------------------- Team */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
}

.team-card {
  position: relative;
  padding: 32px 28px;
  border-radius: var(--r-lg);
  background: var(--bg-2);
  border: 1px solid var(--line);
  overflow: hidden;
  transition: transform .5s var(--ease), border-color .5s var(--ease);
}
.team-card::before {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 3px; height: 0;
  background: var(--grad-amber);
  transition: height .6s var(--ease);
}
.team-card:hover { transform: translateY(-5px); border-color: var(--line-2); }
.team-card:hover::before { height: 100%; }

.team-role {
  font-family: var(--f-serif);
  font-size: 19px;
  margin-bottom: 6px;
}
.team-en {
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 16px;
}
.team-body {
  font-size: 14px;
  color: var(--ink-2);
  line-height: 1.78;
}

/* ---------------------------------------------------------------- Tech */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
}
.tech-pill {
  padding: 22px 20px;
  border-radius: var(--r-md);
  background: var(--bg-2);
  border: 1px solid var(--line);
  transition: all .4s var(--ease);
}
.tech-pill:hover {
  border-color: var(--line-hi);
  background: var(--bg-3);
  transform: translateY(-3px);
}
.tech-pill h4 {
  font-size: 15px;
  font-weight: 500;
  margin-bottom: 7px;
}
.tech-pill p {
  font-family: var(--f-mono);
  font-size: 11.5px;
  color: var(--ink-3);
  letter-spacing: 0.04em;
}

/* ---------------------------------------------------------------- Process */
.flow {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0;
  counter-reset: step;
}
.flow-step {
  position: relative;
  padding: 30px 24px 30px 0;
  counter-increment: step;
}
/* 连接线 */
.flow-step:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 44px;
  left: 52px;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--line-2), transparent);
}
.flow-step::before {
  content: '0' counter(step);
  display: block;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--amber);
  margin-bottom: 16px;
}
.flow-dot {
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--grad-amber);
  box-shadow: 0 0 14px rgba(232,163,77,.5);
  margin-bottom: 20px;
}
.flow-step h4 {
  font-family: var(--f-serif);
  font-size: 17px;
  font-weight: 400;
  margin-bottom: 9px;
}
.flow-step p {
  font-size: 13.5px;
  color: var(--ink-2);
  line-height: 1.75;
}

/* ---------------------------------------------------------------- Contact */
.contact {
  position: relative;
  padding: clamp(80px, 10vw, 130px) 0;
  overflow: hidden;
  background: var(--bg-green);
  border-top: 1px solid var(--line);
}
.contact::before {
  content: '';
  position: absolute;
  width: 700px; height: 500px;
  top: -160px; left: 50%;
  transform: translateX(-50%);
  border-radius: 50%;
  filter: blur(140px);
  background: radial-gradient(circle, rgba(232,163,77,.16) 0%, transparent 68%);
  pointer-events: none;
}
.contact-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: clamp(40px, 6vw, 80px);
  align-items: center;
}

.contact-title {
  font-family: var(--f-serif);
  font-size: clamp(30px, 4.6vw, 54px);
  font-weight: 400;
  line-height: 1.18;
  letter-spacing: -0.015em;
  margin-bottom: 22px;
}
.contact-title em {
  font-style: normal;
  background: var(--grad-amber);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.contact-lede {
  font-size: 16px;
  color: var(--ink-2);
  line-height: 1.85;
  margin-bottom: 38px;
  max-width: 480px;
}

.contact-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* 二维码卡 */
.qr-card {
  display: grid;
  gap: 20px;
  justify-items: center;
  padding: 34px 28px;
  border-radius: var(--r-xl);
  background: color-mix(in srgb, var(--bg-2) 82%, transparent);
  backdrop-filter: blur(14px);
  border: 1px solid var(--line);
  box-shadow: 0 24px 64px rgba(0,0,0,.44);
}
.qr-card img {
  width: 172px; height: 172px;
  border-radius: var(--r-md);
  background: #fff;
  padding: 10px;
}
.qr-hint {
  font-size: 13px;
  color: var(--ink-3);
  text-align: center;
}

/* ---------------------------------------------------------------- Footer */
.footer-min {
  padding: 34px 0;
  border-top: 1px solid var(--line);
  background: var(--bg-0);
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 12.5px;
  color: var(--ink-4);
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--f-serif);
  font-size: 14px;
  color: var(--ink-2);
}
.footer-brand img { width: 24px; height: 24px; border-radius: 6px; }

/* ---------------------------------------------------------------- Reveal */
.rise {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity .85s var(--ease-out), transform .85s var(--ease-out);
  will-change: opacity, transform;
}
.rise.in { opacity: 1; transform: none; }

/* 分组延迟 */
.d1 { transition-delay: .07s; }
.d2 { transition-delay: .14s; }
.d3 { transition-delay: .21s; }
.d4 { transition-delay: .28s; }

/* ---------------------------------------------------------------- Responsive */
@media (max-width: 980px) {
  .contact-inner { grid-template-columns: 1fr; }
  .qr-card { max-width: 300px; margin-inline: auto; }
}

@media (max-width: 760px) {
  .nav-toggle { display: flex; }

  /* 移动端下拉面板 */
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 14px 16px 20px;
    background: var(--bg-0);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 24px 48px rgba(0,0,0,.5);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity .34s var(--ease), transform .34s var(--ease), visibility .34s;
  }
  .nav-links.is-open {
    opacity: 1;
    visibility: visible;
    transform: none;
  }
  .nav-links a {
    padding: 13px 12px;
    font-size: 15px;
    border-radius: 10px;
  }
  .nav-links a::after { display: none; }
  .nav-links a:active { background: var(--bg-2); }
  .nav-cta {
    margin-top: 8px;
    text-align: center;
    padding: 13px 20px !important;
    color: var(--bg-0) !important;
    background: var(--grad-amber);
  }

  .wrap, .hero-inner { width: min(100% - 32px, var(--wrap)); }
  .hero { padding: 120px 0 90px; }
  .hero-chips { margin-top: 48px; }
  .scn-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 10px; }
  .scn { min-height: 132px; }
  .scn-face { padding: 18px 14px; gap: 11px; }
  .scn-detail { padding: 16px 14px; }
  .scn-name { font-size: 14px; }
  .flow-step:not(:last-child)::after { display: none; }
  .section { padding: 80px 0; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
  .rise { opacity: 1; transform: none; }
}

/* ================================================================
   v3 新增：Hero 数据条 / 六服务网格 / 能力卡
   ================================================================ */

/* ---------- Hero 数字条 ---------- */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin-top: 72px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}
.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 24px 12px;
  background: rgba(20,17,14,.6);
  transition: background .4s var(--ease);
}
.stat:hover { background: rgba(232,163,77,.06); }

.stat-num {
  font-family: var(--f-serif);
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 400;
  line-height: 1;
  background: var(--grad-amber);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stat-num--text {
  font-size: clamp(19px, 2.2vw, 25px);
  font-family: var(--f-sans);
  font-weight: 600;
  letter-spacing: .02em;
}
.stat-label {
  font-family: var(--f-mono);
  font-size: 10.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-3);
}

/* ---------- 六服务网格 ---------- */
.svc-grid--6 {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}
.svc-card h3.svc-name {
  display: block;
  font-size: 21px;
}
.svc-card h3.svc-name span {
  display: block;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--ink-4);
  text-transform: uppercase;
  margin-bottom: 8px;
}
.svc-body { font-size: 14px; }

/* ---------- 能力卡 ---------- */
.cap-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 22px;
}

.cap-card {
  position: relative;
  padding: 36px 32px 32px;
  border-radius: var(--r-xl);
  background: var(--bg-2);
  border: 1px solid var(--line);
  overflow: hidden;
  transition: transform .55s var(--ease), box-shadow .55s var(--ease), border-color .55s var(--ease);
}
.cap-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--grad-amber);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .6s var(--ease);
}
.cap-card[data-accent="jade"]::before   { background: var(--grad-jade); }
.cap-card[data-accent="bronze"]::before { background: var(--grad-bronze); }
.cap-card:hover {
  transform: translateY(-8px);
  border-color: var(--line-2);
  box-shadow: 0 24px 60px rgba(0,0,0,.5);
}
.cap-card:hover::before { transform: scaleX(1); }

.cap-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 22px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}
.cap-idx {
  font-family: var(--f-serif);
  font-size: 40px;
  font-weight: 300;
  line-height: 1;
  background: var(--grad-amber);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.cap-card[data-accent="jade"] .cap-idx {
  background: var(--grad-jade);
  -webkit-background-clip: text;
  background-clip: text;
}
.cap-card[data-accent="bronze"] .cap-idx {
  background: var(--grad-bronze);
  -webkit-background-clip: text;
  background-clip: text;
}
.cap-en {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--ink-4);
}

.cap-name {
  font-family: var(--f-serif);
  font-size: 25px;
  font-weight: 400;
  margin-bottom: 8px;
}
.cap-tag {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--amber);
  margin-bottom: 20px;
}
.cap-card[data-accent="jade"] .cap-tag   { color: var(--jade); }
.cap-card[data-accent="bronze"] .cap-tag { color: var(--gold-hi); }

.cap-body {
  font-size: 14.5px;
  color: var(--ink-2);
  line-height: 1.82;
  margin-bottom: 24px;
}

.cap-samples {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}
.cap-samples span {
  padding: 4px 11px;
  border-radius: 999px;
  font-size: 11.5px;
  color: var(--ink-3);
  background: rgba(255,255,255,.03);
  border: 1px solid var(--line);
}

/* ---------- 优势区（4 卡）---------- */
.team-grid:has(.team-card:nth-child(4)) {
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
}

/* ---------- 响应式 ---------- */
@media (max-width: 760px) {
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    margin-top: 52px;
  }
  .stat { padding: 18px 10px; }
}
/* ==========================================================================
   v4 · 联系方式 / 备案 / 动效系统
   原则：高级、克制、有呼吸感与节奏感
   —— 无限循环动效只给背景光晕，周期 ≥ 12s，位移 ≤ 24px，禁弹跳/旋转/数字滚动
   ========================================================================== */

/* ---------------------------------------------------------------- 导航进度线 */
.nav-progress {
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 1.5px;
  background: var(--grad-amber);
  transform: scaleX(var(--scroll-p, 0));
  transform-origin: left center;
  opacity: 0;
  transition: opacity .5s var(--ease);
}
.nav.is-stuck .nav-progress { opacity: .95; }

/* ---------------------------------------------------------------- Hero 极光呼吸 */
.hero-aurora {
  position: absolute;
  inset: -26% -14% auto -14%;
  height: 96%;
  pointer-events: none;
  background:
    radial-gradient(ellipse 58% 52% at 50% 26%, rgba(232, 163, 77, .15), transparent 70%),
    radial-gradient(ellipse 42% 40% at 78% 12%, rgba(143, 199, 171, .07), transparent 72%);
  animation: aurora-breathe 16s var(--ease) infinite;
}
@keyframes aurora-breathe {
  0%, 100% { opacity: .55; transform: scale(1) translateY(0); }
  50%      { opacity: 1;   transform: scale(1.05) translateY(-14px); }
}

/* Hero 标题逐行擦除揭示：动效本体见 v4.1（纯 CSS animation，不依赖 IO） */
.hero-title .hl {
  display: block;
}

/* ---------------------------------------------------------------- 区块光晕呼吸 */
.section::after,
.section::before {
  animation: glow-breathe 20s var(--ease) infinite;
}
@keyframes glow-breathe {
  0%, 100% { opacity: .55; }
  50%      { opacity: 1; }
}

/* ---------------------------------------------------------------- 流程区连线渐进 */
.flow-step:not(:last-child)::after {
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .9s var(--ease);
}
#process.in .flow-step:not(:last-child)::after { transform: scaleX(1); }
/* 逐级错峰，形成节奏 */
#process.in .flow-step:nth-child(2)::after { transition-delay: .12s; }
#process.in .flow-step:nth-child(3)::after { transition-delay: .26s; }
#process.in .flow-step:nth-child(4)::after { transition-delay: .40s; }

/* 流程节点呼吸 */
.flow-dot {
  animation: dot-breathe 6s var(--ease) infinite;
}
.flow-step:nth-child(2) .flow-dot { animation-delay: .5s; }
.flow-step:nth-child(3) .flow-dot { animation-delay: 1s; }
.flow-step:nth-child(4) .flow-dot { animation-delay: 1.5s; }
.flow-step:nth-child(5) .flow-dot { animation-delay: 2s; }
@keyframes dot-breathe {
  0%, 100% { box-shadow: 0 0 0 0 rgba(232, 163, 77, .30); }
  50%      { box-shadow: 0 0 0 7px rgba(232, 163, 77, 0); }
}

/* ---------------------------------------------------------------- 二维码呼吸环 */
.qr-card { position: relative; }
.qr-card::after {
  content: '';
  position: absolute;
  inset: -10px;
  border-radius: 22px;
  border: 1px solid rgba(232, 163, 77, .16);
  pointer-events: none;
  animation: ring-breathe 12s var(--ease) infinite;
}
@keyframes ring-breathe {
  0%, 100% { opacity: .35; transform: scale(.985); }
  50%      { opacity: .9;  transform: scale(1); }
}

/* ---------------------------------------------------------------- 联系方式行 */
.contact-list {
  display: grid;
  gap: 12px;
  margin-top: 34px;
}
.contact-row {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 18px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: var(--bg-1);
  transition: border-color .45s var(--ease), background .45s var(--ease),
              transform .45s var(--ease);
}
.contact-row:hover {
  border-color: var(--line-hi);
  background: var(--bg-2);
  transform: translateY(-3px);
}
.cr-icon {
  flex: none;
  display: grid;
  place-items: center;
  width: 44px; height: 44px;
  border-radius: 13px;
  color: var(--amber);
  background: linear-gradient(140deg, rgba(232, 163, 77, .15), rgba(232, 163, 77, .03));
  border: 1px solid var(--line-2);
}
.cr-body {
  flex: 1 1 auto;
  min-width: 0;
  display: grid;
  gap: 3px;
}
.cr-label {
  font-family: var(--f-mono);
  font-size: 10.5px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--ink-4);
}
.cr-value {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-family: var(--f-serif);
  font-size: 19px;
  letter-spacing: .01em;
  color: var(--ink-1);
  transition: color .35s var(--ease);
  word-break: break-all;
}
.cr-value:hover { color: var(--amber); }
.cr-meta {
  font-size: 12.5px;
  color: var(--ink-3);
}
.cr-copy {
  flex: none;
  display: grid;
  place-items: center;
  width: 44px; height: 44px;
  border-radius: 12px;
  border: 1px solid var(--line-2);
  color: var(--ink-3);
  background: var(--bg-2);
  transition: color .35s var(--ease), border-color .35s var(--ease),
              background .35s var(--ease), transform .35s var(--ease);
}
.cr-copy:hover {
  color: var(--bg-0);
  background: var(--grad-amber);
  border-color: transparent;
  transform: scale(1.06);
}
.cr-copy.is-done { color: var(--bg-0); background: var(--grad-jade); border-color: transparent; }

/* ---------------------------------------------------------------- ICP 备案 */
.footer-legal {
  display: flex;
  justify-content: center;
  margin-top: 18px;
}
.icp {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 44px;
  font-family: var(--f-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--ink-3);
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: color .35s var(--ease), border-color .35s var(--ease), background .35s var(--ease);
}
.icp:hover {
  color: var(--ink-2);
  border-color: var(--line);
  background: var(--bg-1);
}

/* ---------------------------------------------------------------- 复制提示 */
.toast {
  position: fixed;
  left: 50%;
  bottom: 42px;
  z-index: 200;
  transform: translate(-50%, 14px);
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 12px 20px;
  border-radius: 999px;
  font-size: 13.5px;
  letter-spacing: .02em;
  color: var(--ink-1);
  background: color-mix(in srgb, var(--bg-2) 96%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--line-hi);
  box-shadow: 0 18px 46px rgba(0, 0, 0, .5);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity .4s var(--ease), transform .5s var(--ease), visibility .4s;
}
.toast.show {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
}

/* ---------------------------------------------------------------- 触控目标 >= 44px */
.nav-toggle { width: 44px; height: 44px; }
.scn-tab { padding: 11px 20px; }
.nav-brand { padding: 5px 0; }
.nav-links a { padding: 10px 0; }

/* ---------------------------------------------------------------- 移动端适配 */
@media (max-width: 760px) {
  .contact-list { margin-top: 28px; }
  .contact-row { padding: 14px; gap: 12px; }
  .cr-icon { width: 40px; height: 40px; }
  .cr-value { font-size: 16.5px; }
  .cr-meta { font-size: 11.5px; }
  .nav-toggle { width: 44px; height: 44px; }
  .nav-links a { padding: 14px 12px; }
  .toast { bottom: 28px; padding: 11px 18px; font-size: 13px; }
  .hero-aurora { inset: -18% -30% auto -30%; height: 74%; }
}

/* ---------------------------------------------------------------- 降低动效偏好 */
@media (prefers-reduced-motion: reduce) {
  .hero-aurora,
  .flow-dot,
  .qr-card::after,
  .section::after,
  .section::before {
    animation: none !important;
  }
  .hero-title .hl { clip-path: none; }
  .flow-step:not(:last-child)::after { transform: scaleX(1); transition: none; }
}

/* ==========================================================================
   v4.1 · Hero 首屏入场（纯 CSS，不依赖 IntersectionObserver）
   首屏内容必须无条件可见：观察器延迟、加载顺序、缓存差异都不能影响它
   ========================================================================== */
@keyframes hero-rise {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: none; }
}
@keyframes hero-wipe {
  from { opacity: 0; transform: translateY(20px); clip-path: inset(0 0 108% 0); }
  to   { opacity: 1; transform: none;     clip-path: inset(-12% -6% -18% -6%); }
}
.hero-in {
  animation: hero-rise .95s var(--ease-out) both;
}
.hero-title .hl {
  animation: hero-wipe 1.05s var(--ease-out) both;
}
.hero-in.d1, .hl-in.d1 { animation-delay: .08s; }
.hero-in.d2, .hl-in.d2 { animation-delay: .22s; }
.hero-in.d3, .hl-in.d3 { animation-delay: .36s; }
.hero-in.d4, .hl-in.d4 { animation-delay: .50s; }

@media (prefers-reduced-motion: reduce) {
  .hero-in, .hero-title .hl { animation: none; opacity: 1; transform: none; }
}