/* ============================================================
   Baiyin Group v2 — main.css
   深青黑科技底色 + 玻璃质感 + 浅色信息层 + 总部空间延展色
   ============================================================ */

/* ---------- Tokens ---------- */
:root {
  --bg-0: #061116;
  --bg-1: #081A22;
  --bg-2: #0B1F2A;
  --bg-3: #0E2A35;

  --line-1: rgba(255, 255, 255, 0.08);
  --line-2: rgba(255, 255, 255, 0.14);

  --text-0: #FFFFFF;
  --text-1: #F5F7FA;
  --text-2: #B8C3CC;
  --text-3: #7E8A93;

  --accent: #36CFF2;
  --accent-2: #2ED3B7;
  --accent-soft: rgba(54, 207, 242, 0.14);
  --accent-glow: rgba(54, 207, 242, 0.45);

  --light-1: #F6FAFC;
  --light-2: #EAF6F8;
  --light-text: #0B1F2A;
  --light-text-2: #4A5560;

  --hq-wood: #C9A47A;
  --hq-bronze: #8C6A3A;
  --hq-glass: #0A0F12;
  --hq-warm: #C8C8C8;

  --glass-bg: rgba(255, 255, 255, 0.06);
  --glass-bg-strong: rgba(255, 255, 255, 0.10);
  --glass-border: rgba(255, 255, 255, 0.10);

  --max-w: 1280px;
  --gutter: clamp(20px, 4vw, 48px);
  --radius-s: 8px;
  --radius-m: 14px;
  --radius-l: 20px;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);

  --font-cn: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-en: 'Inter', 'Helvetica Neue', 'Arial', sans-serif;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0;
  font-family: var(--font-cn);
  background: var(--bg-0);
  color: var(--text-1);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.7;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color .3s var(--ease); }
a:hover { color: var(--accent); }
button { font-family: inherit; cursor: pointer; }

::selection { background: var(--accent); color: var(--bg-0); }

/* Custom scrollbar */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg-0); }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.08); border-radius: 6px; }
::-webkit-scrollbar-thumb:hover { background: rgba(54,207,242,0.4); }

/* ---------- Typography ---------- */
.eyebrow {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  padding: 6px 12px;
  border: 1px solid rgba(54,207,242,0.3);
  border-radius: 999px;
  background: var(--accent-soft);
  margin-bottom: 24px;
}
h1, h2, h3, h4 {
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text-0);
  margin: 0 0 0.6em;
}
h1 { font-size: clamp(34px, 5vw, 64px); line-height: 1.15; letter-spacing: 0.04em; }
h2 { font-size: clamp(28px, 3.4vw, 44px); line-height: 1.2; }
h3 { font-size: clamp(20px, 1.8vw, 26px); line-height: 1.35; }
h4 { font-size: 16px; letter-spacing: 0.05em; }
.lead { font-size: clamp(16px, 1.2vw, 18px); color: var(--text-2); max-width: 720px; }
.muted { color: var(--text-2); }
.accent-text { color: var(--accent); }
.text-en { font-family: var(--font-en); letter-spacing: 0.04em; }
.mono { font-family: 'Inter Mono', 'Menlo', monospace; }

/* ---------- Layout ---------- */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 var(--gutter); }
.section { padding: clamp(70px, 8vw, 120px) 0; position: relative; }
.section-tight { padding: clamp(48px, 5vw, 72px) 0; }
.grid { display: grid; gap: clamp(20px, 2vw, 32px); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.row { display: flex; gap: 16px; flex-wrap: wrap; align-items: center; }

@media (max-width: 900px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}
@media (min-width: 901px) and (max-width: 1199px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- Navigation ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(6, 17, 22, 0.55);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: background .3s var(--ease), border-color .3s var(--ease);
}
.nav.is-scrolled {
  background: rgba(6, 17, 22, 0.88);
  border-bottom-color: var(--line-1);
}
.nav-inner {
  max-width: var(--max-w); margin: 0 auto;
  padding: 16px var(--gutter);
  display: flex; align-items: center; gap: 20px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; letter-spacing: 0.04em; }
.brand img { width: 28px; height: 28px; }
.brand span { font-size: 16px; color: var(--text-0); }
.brand small { font-family: var(--font-en); font-size: 11px; color: var(--text-3); letter-spacing: 0.18em; margin-left: 4px; }

.nav-links {
  display: flex; gap: clamp(14px, 1.5vw, 26px);
  margin-left: auto;
  font-size: 14px;
}
.nav-links a {
  color: var(--text-2);
  position: relative;
  padding: 6px 2px;
}
.nav-links a:hover, .nav-links a.is-active { color: var(--text-0); }
.nav-links a.is-active::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -2px;
  height: 2px; background: var(--accent); border-radius: 2px;
}

.nav-eos {
  margin-left: 14px;
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 18px;
  font-size: 13px; font-weight: 500;
  color: var(--bg-0);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-radius: 999px;
  letter-spacing: 0.05em;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease);
  box-shadow: 0 0 0 0 rgba(54,207,242,0);
}
.nav-eos:hover {
  color: var(--bg-0);
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(54,207,242,0.35);
}
.nav-eos svg { width: 12px; height: 12px; }

.nav-toggle {
  display: none;
  background: transparent; border: 1px solid var(--line-2);
  border-radius: 8px; padding: 8px;
  color: var(--text-1);
}
.nav-toggle span {
  display: block; width: 18px; height: 2px;
  background: currentColor; margin: 4px 0; transition: all .3s var(--ease);
}

@media (max-width: 1100px) {
  .nav-links { display: none; }
  .nav-toggle { display: inline-flex; flex-direction: column; align-items: center; }
  .nav.is-open .nav-mobile { display: flex; }
}
.nav-mobile {
  display: none;
  position: absolute; top: 100%; left: 0; right: 0;
  flex-direction: column; gap: 4px;
  padding: 16px var(--gutter) 24px;
  background: rgba(6, 17, 22, 0.96);
  border-top: 1px solid var(--line-1);
}
.nav-mobile a {
  display: block; padding: 12px 0;
  border-bottom: 1px solid var(--line-1);
  color: var(--text-1); font-size: 15px;
}
.nav-mobile .nav-eos { align-self: flex-start; margin-top: 12px; margin-left: 0; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex; align-items: center;
  padding: 120px 0 80px;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(ellipse at 70% 30%, rgba(54,207,242,0.10), transparent 55%),
    radial-gradient(ellipse at 20% 80%, rgba(46,211,183,0.08), transparent 55%),
    linear-gradient(180deg, var(--bg-0) 0%, var(--bg-2) 100%);
}
.hero-bg::after {
  content: ''; position: absolute; inset: 0;
  background-image: var(--hero-img, none);
  background-size: cover; background-position: center;
  opacity: 0.22;
  mix-blend-mode: screen;
}
.hero-wave {
  position: absolute; left: 0; right: 0; bottom: 12%;
  width: 100%; height: 220px; z-index: 1;
  opacity: 0.55; pointer-events: none;
}
.hero-wave path {
  fill: none; stroke: var(--accent); stroke-width: 1;
  opacity: 0.5;
  animation: wave-flow 14s linear infinite;
}
.hero-wave path:nth-child(2) { stroke: var(--accent-2); animation-duration: 18s; opacity: 0.35; }
.hero-wave path:nth-child(3) { stroke: rgba(255,255,255,0.4); animation-duration: 22s; opacity: 0.25; }

@keyframes wave-flow {
  0%   { stroke-dasharray: 0 2000; stroke-dashoffset: 0; }
  50%  { stroke-dasharray: 2000 0; stroke-dashoffset: -1000; }
  100% { stroke-dasharray: 0 2000; stroke-dashoffset: -2000; }
}

.hero-particles { position: absolute; inset: 0; z-index: 1; pointer-events: none; }
.hero-particles span {
  position: absolute; width: 3px; height: 3px;
  background: var(--accent); border-radius: 50%;
  opacity: 0.4; animation: hero-breath 6s ease-in-out infinite;
}
@keyframes hero-breath {
  0%, 100% { opacity: 0.15; transform: translateY(0); }
  50%      { opacity: 0.55; transform: translateY(-8px); }
}

.hero-inner {
  position: relative; z-index: 2;
  max-width: var(--max-w); margin: 0 auto;
  padding: 0 var(--gutter);
  width: 100%;
}
.hero h1 {
  font-size: clamp(36px, 6vw, 76px);
  line-height: 1.1;
  margin-bottom: 24px;
}
.hero h1 .hl {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub { font-size: clamp(16px, 1.4vw, 19px); color: var(--text-2); max-width: 720px; margin-bottom: 12px; }
.hero-aux { font-size: 15px; color: var(--text-2); margin-bottom: 8px; }
.hero-en  { font-family: var(--font-en); font-size: 14px; color: var(--text-3); letter-spacing: 0.08em; margin-bottom: 36px; }

.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 26px;
  font-size: 14px; letter-spacing: 0.04em;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: all .3s var(--ease);
  cursor: pointer;
}
.btn svg { width: 14px; height: 14px; }
.btn-primary {
  color: var(--bg-0);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border: none;
}
.btn-primary:hover {
  color: var(--bg-0);
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(54,207,242,0.35);
}
.btn-ghost {
  color: var(--text-1);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--line-2);
}
.btn-ghost:hover { color: var(--text-0); border-color: var(--accent); background: var(--accent-soft); }

.btn-light {
  color: var(--bg-0);
  background: var(--text-0);
  border: 1px solid var(--text-0);
}
.btn-light:hover { color: var(--bg-0); background: rgba(255,255,255,0.85); }

/* ---------- Section title ---------- */
.section-head { max-width: 820px; margin-bottom: 56px; }
.section-head h2 { margin-top: 8px; }

/* ---------- Glass card ---------- */
.card {
  position: relative;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-m);
  padding: clamp(24px, 2.4vw, 36px);
  transition: transform .35s var(--ease), border-color .35s var(--ease), background .35s var(--ease);
  overflow: hidden;
}
.card::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(54,207,242,0.06), transparent 60%);
  opacity: 0; transition: opacity .35s var(--ease);
  pointer-events: none;
}
.card:hover {
  transform: translateY(-4px);
  border-color: rgba(54,207,242,0.4);
  background: var(--glass-bg-strong);
}
.card:hover::before { opacity: 1; }
.card .card-tag {
  display: inline-block; font-family: var(--font-en);
  font-size: 11px; letter-spacing: 0.18em; color: var(--accent);
  margin-bottom: 12px;
}
.card h3 { margin-bottom: 12px; }
.card p { color: var(--text-2); margin: 0; font-size: 15px; }

/* ---------- AOS layer card ---------- */
.aos-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
@media (max-width: 1199px) { .aos-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px)  { .aos-grid { grid-template-columns: 1fr; } }

.aos-card {
  position: relative;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-m);
  padding: 28px 22px;
  min-height: 200px;
  transition: all .35s var(--ease);
  overflow: hidden;
  cursor: default;
}
.aos-card .aos-num {
  font-family: var(--font-en); font-size: 11px; color: var(--accent); letter-spacing: 0.2em;
}
.aos-card h4 { font-size: 18px; margin: 14px 0 6px; color: var(--text-0); }
.aos-card .aos-layer { font-size: 13px; color: var(--text-3); letter-spacing: 0.1em; }
.aos-card .aos-detail {
  margin-top: 14px;
  font-size: 13px; color: var(--text-2); line-height: 1.6;
  opacity: 0.8;
}
.aos-card:hover {
  transform: translateY(-4px);
  background: var(--glass-bg-strong);
  border-color: var(--accent);
  box-shadow: 0 10px 40px rgba(54,207,242,0.18);
}
.aos-card:hover .aos-detail { opacity: 1; color: var(--text-1); }

/* ---------- EOS module card ---------- */
.eos-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
@media (max-width: 1100px) { .eos-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px)  { .eos-grid { grid-template-columns: 1fr; } }

.eos-card {
  position: relative;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-m);
  padding: 28px 22px;
  transition: all .35s var(--ease);
  overflow: hidden;
}
.eos-card::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
  transform: scaleY(0); transform-origin: top;
  transition: transform .4s var(--ease);
}
.eos-card:hover::before { transform: scaleY(1); }
.eos-card:hover { background: var(--glass-bg-strong); border-color: rgba(54,207,242,0.35); transform: translateY(-3px); }
.eos-card .eos-code { font-family: var(--font-en); font-size: 13px; letter-spacing: 0.18em; color: var(--accent); }
.eos-card h4 { margin: 10px 0 6px; font-size: 17px; }
.eos-card p { font-size: 14px; color: var(--text-2); margin: 0; }

/* ---------- Stats ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--line-1);
  border-bottom: 1px solid var(--line-1);
}
@media (max-width: 900px) { .stats { grid-template-columns: repeat(2,1fr); } }
.stats > div {
  padding: 28px 24px;
  border-right: 1px solid var(--line-1);
}
.stats > div:last-child { border-right: none; }
@media (max-width: 900px) {
  .stats > div:nth-child(2) { border-right: none; }
  .stats > div:nth-child(-n+2) { border-bottom: 1px solid var(--line-1); }
}
.stats .stat-num {
  font-family: var(--font-en);
  font-size: clamp(36px, 4vw, 56px);
  font-weight: 600;
  color: var(--text-0);
  letter-spacing: 0.02em;
}
.stats .stat-num small { font-size: 0.5em; color: var(--accent); margin-left: 4px; }
.stats .stat-label { font-size: 13px; color: var(--text-3); letter-spacing: 0.1em; margin-top: 6px; }

/* ---------- Showcase ---------- */
.showcase {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
@media (max-width: 900px) { .showcase { grid-template-columns: 1fr; } }
.show-card {
  position: relative;
  border-radius: var(--radius-l);
  overflow: hidden;
  min-height: 360px;
  background: var(--bg-2);
  border: 1px solid var(--line-1);
  transition: transform .4s var(--ease), border-color .4s var(--ease);
}
.show-card:hover { transform: translateY(-4px); border-color: var(--accent); }
.show-card img {
  width: 100%; height: 100%; object-fit: cover;
  position: absolute; inset: 0;
  transition: transform .8s var(--ease), opacity .4s var(--ease);
  opacity: 0.85;
}
.show-card:hover img { transform: scale(1.05); opacity: 1; }
.show-card .show-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(6,17,22,0.92) 100%);
}
.show-card .show-body {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 28px;
}
.show-card .show-body small { color: var(--accent); letter-spacing: 0.18em; font-family: var(--font-en); font-size: 11px; }
.show-card .show-body h3 { color: var(--text-0); margin: 8px 0 6px; }
.show-card .show-body p { color: var(--text-2); font-size: 14px; margin: 0; }

/* ---------- Light section ---------- */
.section-light {
  background: linear-gradient(180deg, var(--light-1) 0%, var(--light-2) 100%);
  color: var(--light-text);
}
.section-light h2, .section-light h3, .section-light h4 { color: var(--light-text); }
.section-light .lead, .section-light p, .section-light .muted { color: var(--light-text-2); }
.section-light .eyebrow {
  background: rgba(11, 31, 42, 0.06);
  border-color: rgba(11, 31, 42, 0.18);
  color: var(--light-text);
}
.section-light .card {
  background: rgba(255,255,255,0.7);
  border-color: rgba(11,31,42,0.08);
}
.section-light .card:hover { background: #fff; border-color: var(--accent); }
.section-light .card p { color: var(--light-text-2); }
.section-light .btn-ghost { color: var(--light-text); border-color: rgba(11,31,42,0.2); background: rgba(255,255,255,0.5); }

/* ---------- Cognitive path (sticky on left) ---------- */
/* v4 调整：宽度 ~104px；左边距 32px；与主内容间距 ≈96–120px
   弱化对比、轻透明背景、成为辅助层。 */
.cog-path {
  position: fixed;
  left: 32px; top: 50%; transform: translateY(-50%);
  z-index: 50;
  display: none;
  flex-direction: column; gap: 16px;
  width: 104px;
  padding: 14px 12px 14px 14px;
  font-family: var(--font-en); font-size: 10.5px; letter-spacing: 0.16em;
  background: rgba(8, 26, 34, 0.32);
  border: 1px solid rgba(255,255,255,0.04);
  border-radius: 12px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 6px 22px rgba(0,0,0,0.18);
}
@media (min-width: 1280px) { .cog-path { display: flex; } }
.cog-path .cog-line {
  position: absolute; left: 17px; top: 18px; bottom: 18px; width: 1px;
  background: linear-gradient(180deg, transparent, rgba(255,255,255,0.10), transparent);
}
.cog-path .cog-step {
  position: relative;
  padding-left: 16px;
  color: rgba(184,195,204,0.45);
  cursor: pointer;
  transition: color .3s var(--ease);
}
.cog-path .cog-step::before {
  content: ''; position: absolute; left: 0; top: 5px;
  width: 7px; height: 7px;
  border-radius: 50%;
  border: 1px solid rgba(184,195,204,0.28);
  background: transparent;
  transition: all .3s var(--ease);
}
.cog-path .cog-step:hover { color: rgba(245,247,250,0.85); }
.cog-path .cog-step:hover::before { border-color: rgba(184,195,204,0.55); }
.cog-path .cog-step.is-active { color: var(--accent); }
.cog-path .cog-step.is-active::before {
  border-color: var(--accent);
  background: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

/* ---------- Corporate narrative path (homepage v3, refined v4) ---------- */
.cog-path-corp {
  gap: 18px;
  left: 32px;
  width: 108px;
}
.cog-path-corp .cog-line {
  left: 18px; top: 16px; bottom: 16px;
}
.cog-path-corp .cog-step {
  display: flex; flex-direction: column; gap: 1px;
  padding-left: 18px;
  letter-spacing: 0.04em;
  line-height: 1.3;
}
.cog-path-corp .cog-step::before { top: 6px; left: 1px; }
.cog-path-corp .cog-num {
  font-family: var(--font-en);
  font-size: 9.5px;
  letter-spacing: 0.22em;
  color: rgba(184,195,204,0.32);
  transition: color .3s var(--ease);
}
.cog-path-corp .cog-en {
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: rgba(184,195,204,0.55);
  transition: color .3s var(--ease);
}
.cog-path-corp .cog-cn {
  font-family: var(--font-cn);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: rgba(184,195,204,0.40);
  transition: color .3s var(--ease);
}
.cog-path-corp .cog-step:hover .cog-en { color: rgba(245,247,250,0.92); }
.cog-path-corp .cog-step:hover .cog-cn { color: rgba(184,195,204,0.75); }
.cog-path-corp .cog-step.is-active .cog-num,
.cog-path-corp .cog-step.is-active .cog-en,
.cog-path-corp .cog-step.is-active .cog-cn {
  color: var(--accent);
}
@media (max-width: 1380px) {
  .cog-path-corp { left: 20px; width: 100px; }
}

/* ---------- Main content offset on pages with cog-path ---------- */
/* 在 ≥1280px 下，令首页主内容从左侧反表退 ≈12px 额外内边距，
   使认知轴与主内容之间总间距 ≈ 120px，主内容获得呼吸感。 */
@media (min-width: 1280px) {
  body:has(.cog-path-corp) {
    --cog-offset: 56px;
  }
  body:has(.cog-path-corp) .hero-inner,
  body:has(.cog-path-corp) .section > .container,
  body:has(.cog-path-corp) .section-tight > .container,
  body:has(.cog-path-corp) .page-hero > .container {
    padding-left: calc(var(--gutter) + var(--cog-offset));
  }
}
@media (min-width: 1480px) {
  body:has(.cog-path-corp) { --cog-offset: 72px; }
}

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* ---------- Hero scroll-snap row ---------- */
.snap-row {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(300px, 360px);
  gap: 20px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: 8px 4px 24px;
  scrollbar-width: thin;
}
.snap-row > .snap-card {
  scroll-snap-align: start;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-m);
  overflow: hidden;
  display: flex; flex-direction: column;
  min-height: 380px;
  transition: transform .4s var(--ease), border-color .4s var(--ease);
}
.snap-row > .snap-card:hover { transform: translateY(-4px); border-color: var(--accent); }
.snap-card .snap-img { aspect-ratio: 16/10; background: var(--bg-2); overflow: hidden; }
.snap-card .snap-img img { width:100%; height:100%; object-fit: cover; transition: transform .8s var(--ease); }
.snap-card:hover .snap-img img { transform: scale(1.05); }
.snap-card .snap-body { padding: 22px 24px; }
.snap-card .snap-body small { color: var(--accent); font-family: var(--font-en); font-size: 11px; letter-spacing: 0.18em; }
.snap-card .snap-body h4 { margin: 8px 0 8px; font-size: 18px; }
.snap-card .snap-body p { color: var(--text-2); font-size: 14px; margin: 0; }

/* ---------- Footer ---------- */
.footer {
  background: var(--bg-1);
  border-top: 1px solid var(--line-1);
  padding: 70px 0 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
}
@media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; } .footer-brand { grid-column: 1 / -1; } }
@media (max-width: 600px) { .footer-grid { grid-template-columns: 1fr; } }
.footer h5 { font-size: 13px; color: var(--text-0); letter-spacing: 0.16em; margin: 0 0 18px; text-transform: uppercase; font-family: var(--font-en); }
.footer ul { list-style: none; padding: 0; margin: 0; }
.footer li { margin-bottom: 10px; }
.footer a { color: var(--text-2); font-size: 14px; }
.footer a:hover { color: var(--accent); }
.footer-brand p { color: var(--text-2); font-size: 14px; max-width: 320px; }
.footer-brand .brand { margin-bottom: 18px; }
.footer-bottom {
  margin-top: 48px; padding-top: 22px;
  border-top: 1px solid var(--line-1);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
  font-size: 12px; color: var(--text-3); letter-spacing: 0.06em;
}

/* ---------- Page hero (二级页通用) ---------- */
.page-hero {
  position: relative;
  padding: 180px 0 90px;
  overflow: hidden;
  background:
    radial-gradient(ellipse at 80% 20%, rgba(54,207,242,0.08), transparent 55%),
    linear-gradient(180deg, var(--bg-0) 0%, var(--bg-2) 100%);
}
.page-hero::after {
  content: ''; position: absolute; inset: 0;
  background-image: var(--phero-img);
  background-size: cover; background-position: center;
  opacity: 0.16; mix-blend-mode: screen; pointer-events: none;
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero h1 { max-width: 880px; }
.page-hero p.lead { margin-top: 12px; }

/* ---------- Trust strip (浅色 / 长期主义) ---------- */
.trust-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 900px) { .trust-grid { grid-template-columns: 1fr; } }
.trust-item {
  background: rgba(255,255,255,0.85);
  border: 1px solid rgba(11,31,42,0.08);
  border-radius: var(--radius-m);
  padding: 28px;
}
.trust-item h4 { color: var(--light-text); font-size: 17px; margin-bottom: 10px; }
.trust-item p { color: var(--light-text-2); font-size: 14px; margin: 0; }
.trust-item .trust-tag { display: inline-block; font-family: var(--font-en); font-size: 11px; color: var(--accent); letter-spacing: 0.16em; margin-bottom: 10px; }

/* ---------- HQ chapter (sticky narrative) ---------- */
.chapter {
  display: grid; grid-template-columns: 1fr 1fr; gap: 48px;
  align-items: center;
  margin: 60px 0;
}
@media (max-width: 900px) { .chapter { grid-template-columns: 1fr; } }
.chapter.reverse { direction: rtl; }
.chapter.reverse > * { direction: ltr; }
.chapter .ch-img {
  border-radius: var(--radius-l);
  overflow: hidden;
  border: 1px solid var(--line-1);
  aspect-ratio: 4/3;
  background: var(--bg-2);
}
.chapter .ch-img img { width:100%; height:100%; object-fit: cover; }
.chapter .ch-body small { font-family: var(--font-en); font-size: 11px; color: var(--accent); letter-spacing: 0.2em; }
.chapter .ch-body h3 { margin: 10px 0 16px; font-size: clamp(22px, 2vw, 28px); }
.chapter .ch-body p { color: var(--text-2); font-size: 15px; }

/* ---------- Path timeline (HQ) ---------- */
.path-timeline {
  display: flex; gap: 0; align-items: center; flex-wrap: wrap;
  padding: 28px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-m);
}
.path-timeline .path-node {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--font-en); font-size: 12px; letter-spacing: 0.16em; color: var(--text-2);
}
.path-timeline .path-node b { color: var(--accent); font-weight: 500; }
.path-timeline .path-arrow {
  flex: 1; min-width: 24px; height: 1px;
  background: linear-gradient(90deg, var(--accent), transparent);
  margin: 0 14px;
}

/* ---------- Form ---------- */
.form-grid { display: grid; gap: 16px; grid-template-columns: 1fr 1fr; }
@media (max-width: 700px) { .form-grid { grid-template-columns: 1fr; } }
.field label { display: block; font-size: 13px; color: var(--text-2); margin-bottom: 6px; letter-spacing: 0.04em; }
.field input, .field select, .field textarea {
  width: 100%;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-1);
  padding: 12px 14px;
  border-radius: 10px;
  font-family: inherit; font-size: 14px;
  transition: border-color .3s var(--ease), background .3s var(--ease);
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--accent); background: var(--bg-2);
}
.field.full { grid-column: 1 / -1; }
.field textarea { min-height: 120px; resize: vertical; }

/* ---------- Ligre gallery ---------- */
.ligre-gallery {
  display: grid; gap: 16px;
  grid-template-columns: repeat(4, 1fr);
}
@media (max-width: 1100px) { .ligre-gallery { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 700px) { .ligre-gallery { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 420px) { .ligre-gallery { grid-template-columns: 1fr; } }
.ligre-cell {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-m);
  overflow: hidden;
  transition: transform .35s var(--ease), border-color .35s var(--ease);
}
.ligre-cell:hover { transform: translateY(-3px); border-color: var(--accent); }
.ligre-cell .ligre-img { aspect-ratio: 4/5; overflow: hidden; }
.ligre-cell img { width: 100%; height: 100%; object-fit: cover; }
.ligre-cell .ligre-cap { padding: 10px 14px 14px; font-size: 11px; color: var(--text-3); letter-spacing: 0.04em; font-family: var(--font-en); }

/* ---------- Module section heading inside business ---------- */
.biz-module {
  display: grid; grid-template-columns: 1fr 1fr; gap: 40px;
  align-items: center;
  padding: 48px 0;
  border-bottom: 1px solid var(--line-1);
}
@media (max-width: 900px) { .biz-module { grid-template-columns: 1fr; } }
.biz-module:last-child { border-bottom: none; }
.biz-module .biz-img { aspect-ratio: 4/3; overflow: hidden; border-radius: var(--radius-l); border: 1px solid var(--line-1); background: var(--bg-2); }
.biz-module .biz-img img { width:100%; height:100%; object-fit: cover; }
.biz-module ul { list-style: none; padding: 0; margin: 16px 0 0; columns: 2; column-gap: 24px; }
.biz-module ul li { padding: 6px 0 6px 20px; position: relative; color: var(--text-2); font-size: 14px; break-inside: avoid; }
.biz-module ul li::before { content: ''; position: absolute; left: 0; top: 14px; width: 6px; height: 6px; background: var(--accent); border-radius: 50%; }
@media (max-width: 700px) { .biz-module ul { columns: 1; } }
.biz-module .biz-tag { display: inline-block; font-family: var(--font-en); font-size: 11px; color: var(--accent); letter-spacing: 0.18em; }

/* ---------- Notice / disclaimer ---------- */
.notice {
  margin-top: 16px; padding: 12px 16px;
  background: rgba(54,207,242,0.05);
  border: 1px dashed rgba(54,207,242,0.3);
  border-radius: 10px;
  color: var(--text-2);
  font-size: 13px;
}

/* ---------- CTA panel ---------- */
.cta-panel {
  margin-top: 24px;
  padding: clamp(36px, 5vw, 64px);
  background: linear-gradient(135deg, rgba(54,207,242,0.10), rgba(46,211,183,0.06));
  border: 1px solid rgba(54,207,242,0.25);
  border-radius: var(--radius-l);
  text-align: center;
}
.cta-panel h2 { margin-bottom: 14px; }
.cta-panel p { color: var(--text-2); max-width: 640px; margin: 0 auto 24px; }
.cta-panel .row { justify-content: center; }

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1 !important; transform: none !important; }
  .hero-wave path { animation: none; }
}