/* ============================================================
   风简屿 · Direction C · Editorial Tech Studio
   暖白编辑风 · 国际设计工作室质感
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

:root {
  --bg:        #FAFAF9;
  --bg-2:      #F5F0EB;
  --bg-3:      #EDEBE6;
  --ink:       #1C1917;
  --ink-2:     #44403C;
  --ink-3:     #78716C;
  --ink-4:     #A8A29E;
  --pearl:     #FAF8F3;
  --pearl-warm:#F2EDE4;
  --pearl-deep:#ECE6DA;
  --white:     #FFFFFF;
  --bd:        rgba(28,25,23,0.08);
  --bd-h:      rgba(28,25,23,0.18);
  --r-sm: 6px; --r-md: 10px; --r-lg: 16px;
  --t: 0.25s;
}

*,*::before,*::after { box-sizing:border-box; margin:0; padding:0; }
html { scroll-behavior:smooth; }

body {
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei UI","Microsoft YaHei","Noto Sans CJK SC","Inter","SF Pro Display","SF Pro Text",system-ui,-apple-system,BlinkMacSystemFont,sans-serif;
  background: var(--bg);
  color: var(--ink-2);
  font-size:15px; line-height:1.8;
  -webkit-font-smoothing:antialiased; -moz-osx-font-smoothing:grayscale; text-rendering:optimizeLegibility; overflow-x:hidden;
}

a { color:inherit; text-decoration:none; transition:color var(--t); }
a:hover { color:var(--ink); }
ul { list-style:none; }

::selection { background:rgba(28,25,23,0.08); color:var(--ink); }
::-webkit-scrollbar { width:3px; }
::-webkit-scrollbar-track { background:var(--bg-2); }
::-webkit-scrollbar-thumb { background:rgba(28,25,23,0.12); border-radius:2px; }

/* ── Layout ── */
.c { max-width:1200px; margin:0 auto; padding:0 80px; }
.c-narrow { max-width:860px; margin:0 auto; padding:0 80px; }

/* ── Nav ── */
.nav {
  position:fixed; top:0; left:0; right:0; z-index:1000;
  background:rgba(250,250,249,0.90);
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  border-bottom:1px solid var(--bd);
}
.nav-inner { display:flex; align-items:center; justify-content:space-between; height:64px; }
.nav-logo { display:flex; align-items:center; gap:12px; text-decoration:none; transition:opacity var(--t); }
.nav-logo:hover { opacity:0.8; }
.nav-logo-text {
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei UI","Noto Sans CJK SC",sans-serif;
  font-size:16px;
  font-weight:800;
  letter-spacing:-0.05em;
  color:var(--ink);
  line-height:1;
  text-rendering:geometricPrecision;
  -webkit-font-smoothing:antialiased;
}
.nav-links { display:flex; align-items:center; gap:32px }
.nav-links a {
  font-size:14px;
  font-weight:650;
  letter-spacing:-0.01em;
  color:var(--ink-3);
  text-decoration:none;
  transition:color var(--t);
}
.nav-links a:hover { color:var(--ink); }
.nav-links a.active { color:var(--ink); font-weight:600; }
.nav-cta {
  font-size:13px; font-weight:600; color:var(--white); background:var(--ink);
  padding:9px 22px; border-radius:var(--r-md); text-decoration:none;
  transition:all var(--t); flex-shrink:0;
}
.nav-cta:hover { background:var(--ink-2); color:var(--white); }
.hamburger { display:none; flex-direction:column; gap:5px; cursor:pointer; background:none; border:none; padding:8px; }
.hamburger span { display:block; width:22px; height:2px; background:var(--ink); border-radius:1px; }
.mobile-nav { display:none; background:rgba(250,250,249,0.97); border-top:1px solid var(--bd); }
.mobile-nav a { display:block; padding:14px 24px; font-size:14px; color:var(--ink-2); border-bottom:1px solid var(--bd); }

/* ── Hero ── */
.hero {
  min-height:100vh;
  display:grid; grid-template-columns:1.15fr 0.85fr;
  align-items:center; position:relative; overflow:hidden;
}

/* Editorial warm bg */
.hero-bg {
  position:absolute; inset:0; pointer-events:none; z-index:0;
  background:
    radial-gradient(ellipse 70% 60% at 90% 20%, rgba(250,250,249,0.95) 0%, transparent 55%),
    radial-gradient(ellipse 50% 50% at 10% 90%, rgba(237,232,220,0.6) 0%, transparent 50%),
    radial-gradient(ellipse 60% 40% at 50% 80%, rgba(220,210,195,0.3) 0%, transparent 50%),
    linear-gradient(160deg, var(--bg) 0%, var(--bg-2) 50%, var(--bg) 100%);
}
.hero-bg::before {
  content:''; position:absolute; inset:0; pointer-events:none;
  background:
    radial-gradient(ellipse 45% 55% at 88% 35%, rgba(28,25,23,0.04) 0%, transparent 60%),
    radial-gradient(ellipse 35% 45% at 8% 88%, rgba(120,113,108,0.04) 0%, transparent 55%);
}
.hero-grid {
  position:absolute; inset:0; pointer-events:none; z-index:1;
  background-image:
    linear-gradient(rgba(28,25,23,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(28,25,23,0.03) 1px, transparent 1px);
  background-size:72px 72px;
}

/* Ambient floating particles */
.fp {
  position:absolute; border-radius:50%; pointer-events:none; z-index:1;
  animation:fp-drit linear infinite; opacity:0;
}
@keyframes fp-drit {
  0%  {opacity:0; transform:translate(0,0);}
  10% {opacity:0.5;}
  90% {opacity:0.15;}
  100%{opacity:0; transform:translate(20px,-45px);}
}
@keyframes fp-rise {
  0%  {opacity:0; transform:translate(0,0);}
  10% {opacity:0.4;}
  90% {opacity:0.1;}
  100%{opacity:0; transform:translateY(-40px) translateX(10px);}
}

/* ── Hero Left Content ── */
.hero-content {
  position:relative; z-index:3;
  padding:108px 0 80px max(80px, calc((100vw - 1200px) / 2 + 80px));
}

.section-tag {
  display:inline-flex; align-items:center; gap:10px;
  font-size:10px; font-weight:700; letter-spacing:4px; text-transform:uppercase;
  color:var(--ink-4); margin-bottom:40px;
}
.section-tag::before { content:''; width:28px; height:1px; background:var(--ink-4); }

.hero-title {
  font-size:clamp(48px,6.5vw,88px); font-weight:900; line-height:0.95;
  letter-spacing:-0.05em; margin-bottom:16px; color:var(--ink);
}
.hero-title-light { color:var(--ink-3); }
.hero-title-accent { color:var(--ink); }
.hero-title-small { color:var(--ink-4); }

.hero-desc {
  font-size:clamp(14px,1.4vw,17px); line-height:1.85; color:var(--ink-3);
  max-width:480px; margin-bottom:40px;
}

.cta-group { display:flex; gap:12px; align-items:center; flex-wrap:wrap; margin-bottom:56px; }
.btn-dark {
  display:inline-flex; align-items:center; gap:8px;
  background:var(--ink); color:var(--white);
  font-size:14px; font-weight:700; padding:14px 32px; border-radius:var(--r-md);
  text-decoration:none; transition:all var(--t); border:none; cursor:pointer;
}
.btn-dark:hover { background:var(--ink-2); color:var(--white); transform:translateY(-1px); }
.btn-line {
  display:inline-flex; align-items:center; gap:6px;
  font-size:14px; font-weight:500; color:var(--ink-3);
  text-decoration:none; border-bottom:1px solid var(--ink-4);
  padding-bottom:2px; transition:all var(--t);
}
.btn-line:hover { color:var(--ink); border-color:var(--ink); }

.stats-row {
  display:flex; gap:48px; padding-top:40px; border-top:1px solid var(--bd);
}
.stat .num {
  font-family:"Inter","SF Pro Display","PingFang SC",sans-serif;
  font-size:30px;
  font-weight:800;
  color:var(--ink);
  letter-spacing:-0.04em;
}
.stat .lbl { font-size:11px; color:var(--ink-4); margin-top:2px; }

/* ── Hero Right Visual ── */
.hero-visual {
  position:relative; height:100vh;
  display:flex; align-items:center; justify-content:center;
  overflow:hidden; cursor:crosshair; z-index:2; min-width:0;
}
/* Warm orb glow halo */
.hero-visual::before {
  content:''; position:absolute; inset:0; pointer-events:none; z-index:0;
  background: radial-gradient(ellipse 52% 56% at 50% 50%,
    rgba(234,244,255,0.26) 0%,
    rgba(168,199,255,0.07) 30%,
    rgba(125,227,225,0.04) 55%,
    transparent 72%);
  transition:background 0.7s ease;
  animation:pulse-halo 5s ease-in-out infinite;
}
@keyframes pulse-halo {
  0%,100%{transform:scale(1); opacity:0.88;}
  50%{transform:scale(1.05); opacity:1;}
}
.hero-visual:hover::before {
  background: radial-gradient(ellipse 56% 60% at 50% 50%,
    rgba(234,244,255,0.34) 0%,
    rgba(168,199,255,0.12) 30%,
    rgba(125,227,225,0.07) 55%,
    transparent 72%);
}
#hero-canvas {
  position:absolute; inset:0; width:100%; height:100%;
  pointer-events:none; z-index:1;
}

/* Orb Labels */
.orb-labels { position:absolute; inset:0; pointer-events:none; z-index:3; }
.orb-label {
  position:absolute;
  font-family:'Inter',monospace;
  font-size:9px; font-weight:700; letter-spacing:0.12em; text-transform:uppercase;
  color:var(--ink-3); opacity:0.5;
  background:rgba(250,250,249,0.92);
  border:1px solid var(--bd); border-radius:6px; padding:5px 12px;
  backdrop-filter:blur(16px);
  box-shadow:0 2px 16px rgba(28,25,23,0.05);
  transition:all 0.35s;
}
.hero-visual:hover .orb-label {
  opacity:0.75;
  border-color:var(--bd-h);
  box-shadow:0 4px 20px rgba(28,25,23,0.08);
}
.orb-label-1 { top:22%; right:16%; }
.orb-label-2 { top:44%; right:6%; }
.orb-label-3 { top:64%; right:20%; }
.orb-label-4 { top:36%; right:38%; animation:label-float 7s ease-in-out infinite; }
@keyframes label-float { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-8px)} }

/* ── Brand Strip ── */
.brand-strip {
  padding:36px 80px;
  border-top:1px solid var(--bd); border-bottom:1px solid var(--bd);
  background:var(--bg-2);
  display:flex; align-items:center; gap:48px; overflow:hidden;
}
.strip-label { font-size:10px; font-weight:700; letter-spacing:3px; text-transform:uppercase; color:var(--ink-4); flex-shrink:0; }
.strip-items { display:flex; gap:48px; align-items:center; flex-wrap:wrap; }
.strip-item { font-size:13px; font-weight:500; color:var(--ink-3); }

/* ── Sections ── */
.section { padding:100px 0; }
.section-alt { background:var(--bg-2); }
.section-label {
  font-size:10px; font-weight:700; letter-spacing:4px; text-transform:uppercase; color:var(--ink-4);
  margin-bottom:20px; display:flex; align-items:center; gap:12px;
}
.section-label::before { content:''; width:28px; height:1px; background:var(--ink-4); }
.section-title {
  font-size:clamp(28px,3.5vw,48px); font-weight:900; color:var(--ink);
  line-height:1.08; letter-spacing:-0.04em; margin-bottom:16px;
}
.section-intro { font-size:15px; color:var(--ink-3); max-width:560px; font-weight:400; line-height:1.85; }

/* ── Cards ── */
.card {
  background:var(--white); border:1px solid var(--bd);
  border-radius:var(--r-lg); padding:28px;
  transition:all 0.32s cubic-bezier(0.25,0.46,0.45,0.94);
}
.card:hover {
  border-color:var(--bd-h); transform:translateY(-4px);
  box-shadow:0 16px 52px rgba(28,25,23,0.08);
}
.card h3 {
  font-size:15px;
  font-weight:700;
  color:var(--ink);
  margin-bottom:8px;
  letter-spacing:-0.015em;
  line-height:1.3;
}
.card p  { font-size:13px; color:var(--ink-3); line-height:1.8; }
.card-icon { font-size:28px; margin-bottom:14px; }

.grid-2 { display:grid; grid-template-columns:1fr 1fr; gap:20px; }
.grid-3 { display:grid; grid-template-columns:repeat(3,1fr); gap:20px; }
.grid-4 { display:grid; grid-template-columns:repeat(4,1fr); gap:16px; }

/* Tags */
.tag {
  display:inline-block; font-size:11px; font-weight:600; padding:4px 14px;
  border-radius:100px; background:var(--bg-2); border:1px solid var(--bd);
  color:var(--ink-3); transition:all var(--t);
}
.tag:hover { border-color:var(--ink); color:var(--ink); }
.tag-a { background:rgba(28,25,23,0.05); border-color:rgba(28,25,23,0.08); color:var(--ink-2); }

/* Services */
.svc-card {
  background:var(--white); border:1px solid var(--bd);
  border-radius:var(--r-lg); padding:32px; position:relative; overflow:hidden;
  transition:all 0.38s cubic-bezier(0.25,0.46,0.45,0.94);
}
.svc-card::before {
  content:''; position:absolute; top:0; left:0; right:0; height:2px;
  background:linear-gradient(90deg, var(--ink), var(--ink-3));
  opacity:0; transition:opacity 0.4s;
}
.svc-card:hover { border-color:var(--bd-h); transform:translateY(-5px); box-shadow:0 20px 64px rgba(28,25,23,0.08); }
.svc-card:hover::before { opacity:1; }
.svc-num {
  font-family:"Inter","SF Pro Display",monospace;
  font-size:10px;
  font-weight:700;
  letter-spacing:0.18em;
  text-transform:uppercase;
  color:var(--ink-4);
  margin-bottom:12px;
}
.svc-title { font-size:18px; font-weight:800; color:var(--ink); margin-bottom:6px; letter-spacing:-0.02em; }
.svc-sub { font-size:12px; color:var(--ink-4); font-weight:500; margin-bottom:14px; }
.svc-desc { font-size:13px; color:var(--ink-3); line-height:1.85; margin-bottom:20px; }
.svc-dl { display:flex; flex-direction:column; gap:6px; margin-bottom:20px; }
.svc-dl-item { display:flex; align-items:center; gap:8px; font-size:12px; color:var(--ink-3); }
.svc-dl-item::before { content:'→'; color:var(--ink-4); font-size:10px; }
.svc-cta { font-size:12px; font-weight:700; color:var(--ink); display:inline-flex; align-items:center; gap:6px; transition:gap var(--t); }
.svc-cta:hover { color:var(--ink-2); gap:10px; }

/* Process */
.proc-grid { display:grid; grid-template-columns:repeat(6,1fr); gap:12px; }
.proc-step {
  text-align:center; padding:20px 12px;
  background:var(--white); border:1px solid var(--bd);
  border-radius:var(--r-md); transition:all 0.3s;
}
.proc-step:hover { border-color:var(--bd-h); transform:translateY(-2px); }
.proc-num {
  font-family:"Inter","SF Pro Display","PingFang SC",sans-serif;
  font-size:26px;
  font-weight:900;
  color:var(--ink);
  letter-spacing:-0.04em;
  margin-bottom:6px;
}
.proc-step h4 { font-size:12px; font-weight:700; color:var(--ink); margin-bottom:4px; }
.proc-step p { font-size:11px; color:var(--ink-4); line-height:1.6; }

/* Layer / Engine */
.layer-item, .engine-card {
  background:var(--white); border:1px solid var(--bd);
  border-radius:var(--r-lg); padding:24px; transition:all 0.3s;
}
.layer-item:hover, .engine-card:hover { border-color:var(--bd-h); transform:translateY(-2px); }
.layer-num { font-family:'Inter',monospace; font-size:10px; font-weight:700; color:var(--ink-4); letter-spacing:0.1em; margin-bottom:8px; }
.layer-title, .engine-title { font-size:14px; font-weight:700; color:var(--ink); margin-bottom:6px; }
.layer-desc, .engine-desc { font-size:12px; color:var(--ink-3); line-height:1.7; }
.engine-sub { font-size:11px; font-weight:600; color:var(--ink-4); letter-spacing:0.05em; margin-bottom:10px; }

/* Del / Why */
.del-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:12px; }
.del-item {
  background:var(--white); border:1px solid var(--bd);
  border-radius:var(--r-md); padding:16px 18px; text-align:center;
  transition:all 0.3s;
}
.del-item:hover { border-color:var(--bd-h); transform:translateY(-2px); }
.del-item h4 { font-size:12px; font-weight:700; color:var(--ink); margin-bottom:4px; }
.del-item p { font-size:11px; color:var(--ink-4); }
.why-card {
  background:var(--white); border:1px solid var(--bd);
  border-radius:var(--r-lg); padding:28px; transition:all 0.3s;
}
.why-card:hover { border-color:var(--bd-h); transform:translateY(-2px); }
.why-card h3 { font-size:15px; font-weight:700; color:var(--ink); margin-bottom:10px; }
.why-card p { font-size:13px; color:var(--ink-3); line-height:1.8; }

/* CTA Band */
.cta-band {
  padding:100px 0;
  background:var(--pearl-warm);
  background-image:
    radial-gradient(ellipse 60% 40% at 50% 100%, rgba(216,179,106,0.10) 0%, transparent 60%),
    radial-gradient(ellipse 40% 30% at 20% 80%, rgba(168,199,255,0.08) 0%, transparent 50%);
  text-align:center; position:relative; overflow:hidden;
  border-top:1px solid rgba(28,25,23,0.06);
}
.cta-title { font-size:clamp(28px,4vw,52px); font-weight:900; color:var(--ink); letter-spacing:-0.04em; margin-bottom:16px; line-height:1.0; }
.cta-sub { font-size:15px; color:var(--ink-3); margin-bottom:40px; font-weight:400; line-height:1.7; }
.cta-row { display:flex; gap:12px; justify-content:center; flex-wrap:wrap; }
.btn-light {
  display:inline-flex; align-items:center; gap:8px;
  background:var(--ink); color:var(--white);
  font-size:14px; font-weight:700; padding:14px 32px; border-radius:var(--r-md);
  text-decoration:none; transition:all var(--t); border:none; cursor:pointer; letter-spacing:-0.01em;
}
.btn-light:hover { background:var(--ink-2); transform:translateY(-1px); }
.btn-ghost-warm {
  display:inline-flex; align-items:center; gap:8px;
  background:transparent; color:var(--ink-2);
  font-size:14px; font-weight:500; padding:14px 32px; border-radius:var(--r-md);
  border:1.5px solid rgba(28,25,23,0.18); text-decoration:none; transition:all var(--t);
}
.btn-ghost-warm:hover { border-color:var(--ink); color:var(--ink); }

/* Footer */
.footer {
  background:var(--pearl-warm);
  background-image:
    radial-gradient(ellipse 60% 40% at 80% 0%, rgba(216,179,106,0.08) 0%, transparent 50%),
    radial-gradient(ellipse 40% 30% at 10% 20%, rgba(168,199,255,0.06) 0%, transparent 50%);
  padding:60px 0 32px;
  border-top:1px solid rgba(28,25,23,0.06);
}
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:48px; margin-bottom:40px; }
.footer-logo { font-size:18px; font-weight:900; color:var(--ink); letter-spacing:-0.025em; margin-bottom:12px; }
.footer-brand p { font-size:13px; color:var(--ink-3); line-height:1.8; max-width:260px; }
.footer h4 {
  font-family:"Inter","SF Pro Text","PingFang SC",sans-serif;
  font-size:10px;
  font-weight:700;
  text-transform:uppercase;
  letter-spacing:0.2em;
  color:var(--ink-4);
  margin-bottom:16px;
}
.footer ul { display:flex; flex-direction:column; gap:10px; }
.footer ul li a { font-size:13px; color:var(--ink-3); transition:color var(--t); }
.footer ul li a:hover { color:var(--ink); }
.footer-bottom { padding-top:24px; border-top:1px solid rgba(28,25,23,0.07); font-size:11px; color:var(--ink-4); display:flex; justify-content:space-between; gap:16px; flex-wrap:wrap; }
.footer-bottom a { color:var(--ink-4); }
.footer-bottom a:hover { color:var(--ink); }

/* Forms */
.form-grid { display:grid; grid-template-columns:1fr 1fr; gap:14px; }
.form-group { display:flex; flex-direction:column; gap:6px; }
.form-label { font-size:12px; font-weight:600; color:var(--ink-2); }
.form-in,.form-sel,.form-area {
  width:100%; padding:10px 14px;
  border:1.5px solid var(--bd); border-radius:var(--r-md); font-size:14px; color:var(--ink);
  background:rgba(255,255,255,0.82); outline:none; transition:border-color var(--t);
  font-family:'Inter',sans-serif;
}
.form-in:focus,.form-sel:focus,.form-area:focus { border-color:var(--ink); box-shadow:0 0 0 3px rgba(28,25,23,0.06); }
.form-area { resize:vertical; min-height:120px; }

/* Responsive */
@media (max-width:1100px) {
  .hero { grid-template-columns:1fr; }
  .hero-visual { height:55vh; }
  .hero-content { padding:120px 80px 60px; }
  .proc-grid { grid-template-columns:repeat(3,1fr); }
  .del-grid { grid-template-columns:repeat(2,1fr); }
  .footer-grid { grid-template-columns:1fr 1fr; }
}
@media (max-width:768px) {
  .c, .c-narrow { padding:0 32px; }
  .nav-links, .nav-cta { display:none; }
  .hamburger { display:flex; }
  .hero-content { padding:120px 32px 60px; }
  .hero-title { font-size:clamp(38px,10vw,64px); }
  .brand-strip { padding:28px 32px; flex-direction:column; align-items:flex-start; gap:20px; }
  .section { padding:64px 0; }
  .grid-2,.grid-3,.grid-4 { grid-template-columns:1fr; }
  .proc-grid { grid-template-columns:repeat(2,1fr); }
  .footer-grid { grid-template-columns:1fr; gap:32px; }
  .form-grid { grid-template-columns:1fr; }
}