/* ============================================================
   THEME · DARK-TECH (Linear / Stripe / Vercel grade)
   Midnight ink + violet-cyan dual accent + mesh gradient
   File still named theme-light.css for stable <link> path.
   ============================================================ */

:root {
  /* Brighter, more vibrant midnight purple — feels "alive" not "黑乎乎" */
  --bg:          #15173a;       /* deep purple navy (much brighter than #0a) */
  --bg-alt:      #1c1f4a;
  --bg-card:     rgba(255,255,255,0.05);
  --bg-card-2:   rgba(255,255,255,0.08);

  /* Vibrant neon accent */
  --accent:        #38e1ff;     /* electric cyan */
  --accent-2:      #c084fc;     /* neon violet */
  --accent-soft:   rgba(56,225,255,0.1);
  --accent-mid:    rgba(56,225,255,0.22);
  --accent-border: rgba(56,225,255,0.35);

  --gold:        #ffd23f;
  --gold-soft:   rgba(255,210,63,0.1);
  --gold-border: rgba(255,210,63,0.38);
  --gold-glow:   rgba(255,210,63,0.06);

  --text-1:      #ffffff;
  --text-2:      #d8dce5;
  --text-3:      #9aa0b5;
  --text-4:      #6a7188;

  --rule:        rgba(255,255,255,0.1);
  --rule-soft:   rgba(255,255,255,0.06);
  --rule-hair:   rgba(255,255,255,0.04);
}

/* ─── Body & grain noise overlay ─── */
body {
  background: var(--bg);
  color: var(--text-1);
  position: relative;
}
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 1  0 0 0 0 1  0 0 0 0 1  0 0 0 0.03 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
  opacity: 0.4;
  mix-blend-mode: overlay;
}

.section.alt-bg { background: var(--bg-alt); }

/* ─── Hero — vibrant mesh gradient + giant typography ─── */
.section-hero {
  background:
    radial-gradient(ellipse 1200px 700px at 20% 20%, rgba(192,132,252,0.4) 0%, transparent 50%),
    radial-gradient(ellipse 1000px 600px at 85% 75%, rgba(56,225,255,0.35) 0%, transparent 50%),
    radial-gradient(ellipse 800px 500px at 50% 100%, rgba(255,210,63,0.12) 0%, transparent 60%),
    linear-gradient(135deg, #1a1d4a 0%, #15173a 50%, #1f1a4d 100%);
}
.section-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 80px 80px;
  mask: radial-gradient(ellipse 70% 60% at 50% 50%, black 30%, transparent 90%);
  -webkit-mask: radial-gradient(ellipse 70% 60% at 50% 50%, black 30%, transparent 90%);
  pointer-events: none;
}
.hero-label { color: var(--accent); }
.hero-name {
  background: linear-gradient(135deg, #ffffff 0%, var(--accent) 40%, var(--accent-2) 80%, #ffffff 100%);
  background-size: 200% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: hero-shine 8s ease-in-out infinite;
}
@keyframes hero-shine {
  0%, 100% { background-position: 0% 0; }
  50%      { background-position: 100% 0; }
}
.hero-subtitle, .hero-info { color: var(--text-3); }
.hero-email { color: var(--accent); }
.hero-blurb { color: var(--text-2); }
.hero-blurb .hl-num,
.hero-blurb .hl-accent { color: var(--accent); }
.role-item { color: var(--text-1); }
.role-item::before { background: var(--accent); }
.scroll-indicator span { color: var(--text-3); }
.scroll-arrow { border-color: var(--text-3); }

#particle-canvas { opacity: 0.55; }

/* ─── Navigation — glass blur dark ─── */
#nav {
  background: rgba(10,12,24,0.72);
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  border-bottom: 0.5px solid var(--rule);
}
#nav.scrolled { box-shadow: 0 4px 28px rgba(0,0,0,0.4); }
.nav-name { color: var(--text-1); }
.nav-links a { color: var(--text-3); }
.nav-links a:hover, .nav-links a.active { color: var(--accent); }
.nav-hamburger span { background: var(--text-1); }
.mobile-menu {
  background: rgba(10,12,24,0.96);
  backdrop-filter: blur(20px);
}
.mm-link { color: var(--text-1); }
.mm-link:hover { color: var(--accent); }

#progress-bar { background: linear-gradient(90deg, var(--accent) 0%, var(--accent-2) 50%, var(--gold) 100%); }

/* ─── Section header ─── */
.sec-en {
  color: var(--accent);
  text-shadow: 0 0 24px rgba(90,200,250,0.4);
}
.sec-cn { color: var(--text-1); }

/* ─── About ─── */
.about-text p { color: var(--text-2); }
.meta-lbl { color: var(--text-4); }
.meta-val { color: var(--text-1); }
.cap-item {
  background: var(--bg-card);
  border: 0.5px solid var(--rule);
  backdrop-filter: blur(8px);
}
.cap-title { color: var(--text-1); }
.cap-desc { color: var(--text-3); }

/* ─── Timeline ─── */
.tl-card {
  background: var(--bg-card);
  border: 0.5px solid var(--rule);
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.25);
}
.tl-card-active {
  background: linear-gradient(135deg, rgba(90,200,250,0.1) 0%, rgba(167,139,250,0.08) 100%);
  border-color: var(--accent-border);
  box-shadow: 0 12px 36px rgba(90,200,250,0.15);
}
.tl-period { color: var(--text-3); }
.tl-role { color: var(--text-1); }
.tl-company { color: var(--text-3); }
.tl-dot { background: var(--text-4); border: 2px solid var(--bg); }
.tl-dot-active {
  background: var(--accent);
  border: 2px solid var(--bg);
  box-shadow: 0 0 0 5px rgba(90,200,250,0.2), 0 0 20px rgba(90,200,250,0.5);
}
.ttag {
  background: rgba(255,255,255,0.04);
  color: var(--text-2);
  border: 0.5px solid var(--rule);
}
.ttag.gold {
  background: var(--gold-soft);
  color: var(--gold);
  border: 0.5px solid var(--gold-border);
}

/* ─── Project sections ─── */
.proj-tag { color: var(--text-3); }
.proj-meta-block { color: var(--text-2); }
.pm-lbl, .em-lbl { color: var(--text-4); }
.pm-val, .em-val { color: var(--text-1); }
.pstat-num, .pstat-plus { color: var(--accent); text-shadow: 0 0 20px rgba(90,200,250,0.3); }
.pstat-lbl { color: var(--text-4); }

.wcard, .wcard-sm, .wb, .mg-card, .ma-card, .tc, .loop-card, .tm-card, .sc-card, .eng-item {
  background: var(--bg-card);
  border: 0.5px solid var(--rule);
  backdrop-filter: blur(8px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.22);
}
.wcard.featured, .mg-card.featured-card, .ma-card.ma-featured {
  background: linear-gradient(135deg, rgba(90,200,250,0.06) 0%, rgba(167,139,250,0.04) 100%);
  border-color: var(--accent-border);
  box-shadow: 0 12px 36px rgba(90,200,250,0.1);
}
.wc-num, .wsn, .wb-num, .ma-num { color: var(--accent); }
.wc-title, .wst, .wb-title, .mg-title, .ma-title, .tc-title, .ei-title { color: var(--text-1); }
.wc-desc, .wsd, .wb-desc, .mg-desc, .ma-desc, .tc-desc, .ei-desc { color: var(--text-2); }
.wc-desc .hl, .wsd .hl, .wb-desc .hl, .ei-desc .hl { color: var(--accent); font-weight: 600; }

/* Architecture flows */
.af-node, .ef-node {
  background: var(--bg-card);
  border: 0.5px solid var(--rule);
  color: var(--text-1);
  backdrop-filter: blur(8px);
}
.af-node.accent, .ef-node.accent {
  background: var(--accent-soft);
  border-color: var(--accent-border);
  color: var(--accent);
}
.af-node.gold { background: var(--gold-soft); border-color: var(--gold-border); color: var(--gold); }
.af-node.small { background: rgba(255,255,255,0.03); color: var(--text-2); }
.af-node.dim { color: var(--text-3); }
.af-arr, .ef-arr, .bf-arr { background: var(--text-3); }
.arch-lbl, .arch-label-row, .domain-label, .sub-label, .chain-flow-label,
.loop-label, .team-label { color: var(--text-3); }

/* Domain / sub matrix */
.dm-cell, .sub-cell {
  background: var(--bg-card);
  border: 0.5px solid var(--rule);
  backdrop-filter: blur(8px);
}
.dm-cell.accent-cell, .sub-cell.core-cell {
  background: var(--accent-soft);
  border-color: var(--accent-border);
}
.sub-cell.gold-cell { background: var(--gold-soft); border-color: var(--gold-border); }
.dc-cn, .sc-cn { color: var(--text-1); }
.dc-en, .sc-en { color: var(--text-3); }

/* Layer arch */
.la-box {
  background: var(--bg-card);
  border: 0.5px solid var(--rule);
  backdrop-filter: blur(8px);
}
.la-box.accent-box { background: var(--accent-soft); border-color: var(--accent-border); }
.la-box.gold-box { background: var(--gold-soft); border-color: var(--gold-border); }
.la-box.dim-box { background: rgba(255,255,255,0.025); }
.la-title { color: var(--text-1); }
.la-tech { color: var(--text-3); }
.la-desc { color: var(--text-2); }
.la-badge { background: var(--accent); color: var(--bg); box-shadow: 0 0 16px rgba(90,200,250,0.4); }
.la-badge.gold-badge { background: var(--gold); color: var(--bg); box-shadow: 0 0 16px rgba(255,184,77,0.4); }
.la-badge.dim-badge { background: var(--text-3); color: var(--bg); }

/* Biz flow */
.bf-step {
  background: var(--bg-card);
  border: 0.5px solid var(--rule);
  color: var(--text-1);
}
.bf-step.gold-step { background: var(--gold-soft); border-color: var(--gold-border); color: var(--gold); }

/* Chain flow */
.cf-chain, .cf-box {
  background: var(--bg-card);
  border: 0.5px solid var(--rule);
  color: var(--text-1);
}
.cf-box.gold { background: var(--gold-soft); border-color: var(--gold-border); color: var(--gold); }
.cf-chain-more { color: var(--text-3); }
.cf-title { color: var(--text-1); }
.cf-sub { color: var(--text-3); }

/* Code stat */
.code-stat-block {
  background: var(--bg-card);
  border: 0.5px solid var(--rule);
  backdrop-filter: blur(10px);
  box-shadow: 0 12px 36px rgba(0,0,0,0.3);
}
.cs-big {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.cs-plus { color: var(--accent); }
.cs-unit, .cs-break { color: var(--text-3); }
.cs-hairline { background: var(--accent); opacity: 0.4; }

/* Stack pills */
.pill {
  background: var(--bg-card);
  border: 0.5px solid var(--rule);
  color: var(--text-2);
  backdrop-filter: blur(6px);
}
.pill.core {
  background: var(--accent-soft);
  border-color: var(--accent-border);
  color: var(--accent);
}

/* Startup hero */
.big-kpi-num {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.big-kpi-unit, .kpi-label { color: var(--text-3); }
.kpi-hairline { background: linear-gradient(90deg, var(--accent), var(--accent-2), transparent); }
.sm-num { color: var(--text-1); }
.sm-num.gold-num { color: var(--gold); }
.sm-plus { color: var(--accent); }
.sm-lbl { color: var(--text-4); }
.sm-row { border-bottom: 0.5px solid var(--rule-soft); }
.sm-k { color: var(--text-3); }
.sm-v { color: var(--text-1); }
.loop-head { color: var(--accent); border-bottom: 0.5px solid var(--rule-soft); }
.li { color: var(--text-2); }
.end-note { color: var(--text-3); }

/* Exp sections */
.exp-period, .exp-company { color: var(--text-3); }
.exp-product { color: var(--text-1); }
.exp-kpi-block {
  background: var(--bg-card);
  border: 0.5px solid var(--rule);
  backdrop-filter: blur(10px);
  box-shadow: 0 12px 36px rgba(0,0,0,0.25);
}
.exp-kpi-block.gold-kpi { background: var(--gold-soft); border-color: var(--gold-border); }
.ekpi-num { color: var(--accent); text-shadow: 0 0 24px rgba(90,200,250,0.3); }
.ekpi-num.gold-num { color: var(--gold); text-shadow: 0 0 24px rgba(255,184,77,0.3); }
.ekpi-hairline { background: var(--accent); }
.ekpi-hairline.gold-hairline { background: var(--gold); }
.ekpi-lbl { color: var(--text-2); }
.ekpi-sub { color: var(--text-4); }
.es-num { color: var(--text-1); }
.es-lbl { color: var(--text-4); }
.tm-role { color: var(--text-1); }
.tm-task { color: var(--text-3); }
.tm-card.leader-card { background: var(--accent-soft); border-color: var(--accent-border); }
.wr { border-bottom: 0.5px solid var(--rule-soft); }
.wr.wr-hl { background: var(--accent-soft); }
.wr-k { color: var(--text-1); }
.wr-v { color: var(--text-2); }
.gain-block { background: var(--bg-card); border: 0.5px solid var(--rule); backdrop-filter: blur(8px); }
.gb-title { color: var(--accent); }
.gi { color: var(--text-2); }
.pivot-badge {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  color: #fff;
  box-shadow: 0 6px 18px rgba(90,200,250,0.3);
}
.pivot-badge.small-badge { background: var(--gold); color: var(--bg); }

/* Role timeline */
.rt-line { background: var(--rule); }
.rt-dot { background: var(--text-4); border: 2px solid var(--bg); }
.rt-dot.active-dot {
  background: var(--accent);
  border: 2px solid var(--bg);
  box-shadow: 0 0 0 5px rgba(90,200,250,0.15), 0 0 16px rgba(90,200,250,0.5);
}
.rt-year, .rt-role { color: var(--text-3); }
.rt-node.active .rt-year, .rt-node.active .rt-role { color: var(--text-1); }

/* Stage cards */
.sc-card.sc-active { background: var(--accent-soft); border-color: var(--accent-border); }
.sc-phase, .sc-year { color: var(--text-3); }
.sc-badge { background: var(--text-1); color: var(--bg); }
.sc-role { color: var(--text-1); }
.sp { color: var(--text-2); }
.sp .hl { color: var(--accent); font-weight: 600; }

/* Tech section */
.tc-cat { border-top-color: var(--rule); }
.tcat-en { color: var(--accent); }
.tcat-cn { color: var(--text-1); }
.tr-name { color: var(--text-1); }
.tr-name.core { color: var(--accent); }
.tr-desc { color: var(--text-3); }
.tr-desc .hl { color: var(--text-1); font-weight: 500; }

/* Engineering */
.eng-item.hl-eng {
  background: linear-gradient(135deg, rgba(90,200,250,0.08) 0%, rgba(167,139,250,0.04) 100%);
  border-color: var(--accent-border);
}
.eng-item .ei-desc .hl { color: var(--accent); font-weight: 600; }

/* Contact */
.contact-pre { color: var(--accent); }
.contact-name {
  background: linear-gradient(135deg, #ffffff 0%, var(--accent) 50%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.contact-name .cn-bold {
  -webkit-text-fill-color: var(--accent);
}
.contact-line { background: linear-gradient(90deg, var(--accent), var(--accent-2), transparent); }
.contact-subtitle { color: var(--text-3); }
.contact-card {
  background: var(--bg-card);
  border: 0.5px solid var(--accent-border);
  backdrop-filter: blur(12px);
  box-shadow: 0 16px 48px rgba(90,200,250,0.1);
}
.cc-lbl { color: var(--text-4); }
.cc-val { color: var(--accent); }
.contact-edu { border-top: 0.5px solid var(--rule); color: var(--text-3); }
.edu-school { color: var(--text-1); }
.edu-sep { color: var(--rule); }
.footer-bar { color: var(--text-4); border-top: 0.5px solid var(--rule); }

/* ============================================================
   OPS · 4-card grid (运营能力)
   ============================================================ */
.section-ops {
  background:
    radial-gradient(ellipse 1000px 600px at 80% 0%, rgba(167,139,250,0.1) 0%, transparent 60%),
    radial-gradient(ellipse 800px 500px at 20% 100%, rgba(90,200,250,0.08) 0%, transparent 60%),
    var(--bg);
  position: relative;
  overflow: hidden;
}
.ops-intro {
  text-align: center;
  font-family: var(--font-cn);
  font-size: 15px;
  color: var(--text-3);
  letter-spacing: 0.06em;
  margin: -8px auto 56px;
  max-width: 880px;
}
.ops-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  max-width: 1200px;
  margin: 0 auto;
}
.ops-card {
  background:
    radial-gradient(ellipse 500px 300px at 0% 0%, rgba(167,139,250,0.07) 0%, transparent 60%),
    linear-gradient(180deg, rgba(255,255,255,0.04) 0%, rgba(255,255,255,0.015) 100%);
  border: 1px solid var(--rule);
  border-radius: 20px;
  padding: 36px 36px 32px;
  backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
  box-shadow:
    0 1px 0 rgba(255,255,255,0.05) inset,
    0 18px 50px rgba(0,0,0,0.3);
  transition: all 0.5s cubic-bezier(.15,.8,.2,1);
}
.ops-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 20px;
  padding: 1px;
  background: linear-gradient(135deg, rgba(167,139,250,0.18) 0%, transparent 30%, transparent 70%, rgba(90,200,250,0.18) 100%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  pointer-events: none;
  opacity: 0.6;
  transition: opacity 0.5s;
}
.ops-card:hover {
  transform: translateY(-3px);
  border-color: rgba(167,139,250,0.3);
  box-shadow:
    0 1px 0 rgba(255,255,255,0.08) inset,
    0 28px 70px rgba(0,0,0,0.5),
    0 0 0 1px rgba(167,139,250,0.1),
    0 0 60px rgba(167,139,250,0.12);
}
.ops-card:hover::before { opacity: 1; }
.ops-head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 18px;
}
.ops-num {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: 0.18em;
  font-variant-numeric: tabular-nums;
}
.ops-cat {
  font-family: var(--font-cn);
  font-size: 13px;
  font-weight: 700;
  color: var(--accent-2);
  letter-spacing: 0.32em;
  padding: 4px 10px;
  background: rgba(167,139,250,0.08);
  border: 0.5px solid rgba(167,139,250,0.28);
  border-radius: 3px;
}
.ops-title {
  font-family: var(--font-cn);
  font-size: 24px;
  font-weight: 700;
  color: var(--text-1);
  letter-spacing: 0.02em;
  line-height: 1.3;
  margin-bottom: 22px;
}
.ops-kpi-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  padding: 18px 0;
  border-top: 0.5px solid var(--rule-soft);
  border-bottom: 0.5px solid var(--rule-soft);
  margin-bottom: 22px;
}
.ops-kpi { display: flex; flex-direction: column; gap: 4px; }
.ops-kpi-n {
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums slashed-zero;
  line-height: 1;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.ops-kpi-l {
  font-family: var(--font-cn);
  font-size: 11px;
  color: var(--text-4);
  letter-spacing: 0.12em;
}
.ops-points {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.ops-points li {
  font-family: var(--font-cn);
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.6;
  padding-left: 20px;
  position: relative;
}
.ops-points li::before {
  content: '';
  position: absolute;
  left: 0; top: 11px;
  width: 8px;
  height: 1px;
  background: var(--accent);
}
.ops-source {
  font-family: var(--font-cn);
  font-size: 12px;
  color: var(--text-4);
  letter-spacing: 0.08em;
  padding-top: 14px;
  border-top: 0.5px solid var(--rule-hair);
}
@media (max-width: 768px) {
  .ops-grid { grid-template-columns: 1fr !important; gap: 18px !important; }
  .ops-card { padding: 26px 22px !important; border-radius: 16px !important; }
  .ops-title { font-size: 19px !important; margin-bottom: 16px !important; }
  .ops-kpi-n { font-size: 24px !important; }
  .ops-kpi-l { font-size: 10px !important; }
  .ops-points li { font-size: 13px !important; }
  .ops-intro { font-size: 13px !important; margin-bottom: 36px !important; }
}

/* ============================================================
   PORTFOLIO · dark-tech override
   ============================================================ */
.section-portfolio {
  background:
    radial-gradient(ellipse 1200px 600px at 20% 0%, rgba(90,200,250,0.08) 0%, transparent 60%),
    radial-gradient(ellipse 900px 500px at 80% 100%, rgba(167,139,250,0.08) 0%, transparent 60%),
    radial-gradient(ellipse 700px 400px at 50% 50%, rgba(255,184,77,0.03) 0%, transparent 60%),
    var(--bg);
}
.section-portfolio::before {
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
}
.pi-pill {
  color: var(--text-3);
  border-color: var(--rule);
  background: var(--bg-card);
  backdrop-filter: blur(6px);
}

.pf-card {
  background:
    radial-gradient(ellipse 600px 300px at 50% -10%, rgba(90,200,250,0.06) 0%, transparent 60%),
    linear-gradient(180deg, rgba(255,255,255,0.04) 0%, rgba(255,255,255,0.015) 100%);
  border: 1px solid var(--rule);
  backdrop-filter: blur(12px);
  box-shadow:
    0 1px 0 rgba(255,255,255,0.06) inset,
    0 24px 70px rgba(0,0,0,0.5);
}
.pf-card:hover {
  border-color: var(--accent-border);
  box-shadow:
    0 1px 0 rgba(255,255,255,0.08) inset,
    0 32px 80px rgba(0,0,0,0.6),
    0 0 0 1px rgba(90,200,250,0.08),
    0 0 60px rgba(90,200,250,0.1);
}
.pf-card::before {
  background: linear-gradient(135deg, rgba(90,200,250,0.25) 0%, transparent 30%, transparent 70%, rgba(167,139,250,0.18) 100%);
}
.pf-mock {
  background:
    radial-gradient(ellipse 80% 70% at 50% 30%, rgba(90,200,250,0.08) 0%, transparent 70%),
    linear-gradient(180deg, rgba(13,18,38,0.6) 0%, rgba(8,12,24,0.8) 100%);
  border-bottom: 0.5px solid var(--rule);
}
.pf-mock::after {
  background: linear-gradient(180deg, transparent 0%, rgba(8,12,24,0.6) 100%);
}

.portfolio-grid .pf-card:first-child {
  background:
    radial-gradient(ellipse 800px 400px at 30% -20%, rgba(34,197,94,0.07) 0%, transparent 60%),
    radial-gradient(ellipse 600px 300px at 90% 100%, rgba(90,200,250,0.06) 0%, transparent 60%),
    linear-gradient(180deg, rgba(255,255,255,0.04) 0%, rgba(255,255,255,0.015) 100%);
}
.portfolio-grid .pf-card:first-child .pf-mock {
  border-right: 0.5px solid var(--rule);
}

.pf-title { color: var(--text-1); }
.pf-desc { color: var(--text-3); }
.pf-desc .hl { color: var(--accent); font-weight: 600; }

.pf-cat.android-cat {
  color: #22c55e;
  background: rgba(34,197,94,0.08);
  border: 0.5px solid rgba(34,197,94,0.28);
}
.pf-cat.web-cat {
  color: var(--accent);
  background: var(--accent-soft);
  border: 0.5px solid var(--accent-border);
}
.pf-cat.finance-cat {
  color: var(--gold);
  background: var(--gold-soft);
  border: 0.5px solid var(--gold-border);
}
.pf-status { color: var(--text-3); }
.pf-status.live { color: #22c55e; }
.pf-status.live::before { background: #22c55e; box-shadow: 0 0 6px #22c55e; }
.pf-status.internal::before { background: var(--text-3); }

.pf-kpis {
  border-top-color: var(--rule-soft);
  border-bottom-color: var(--rule-soft);
}
.pfk-num {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 50%, var(--accent) 100%);
  background-size: 200% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.pfk-plus, .pfk-unit { color: var(--accent); -webkit-text-fill-color: var(--accent); }
.pfk-lbl { color: var(--text-4); }

.pf-pill {
  background: rgba(255,255,255,0.03);
  border: 0.5px solid var(--rule);
  color: var(--text-2);
}
.pf-pill.core {
  background: var(--accent-soft);
  border-color: var(--accent-border);
  color: var(--accent);
}
.pf-pill:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 4px 12px rgba(90,200,250,0.2);
}

.pf-link {
  background: var(--accent-soft);
  border-color: var(--accent-border);
  color: var(--accent);
}
.pf-link:hover {
  background: rgba(90,200,250,0.14);
  border-color: var(--accent);
  color: #b5e3ff;
  box-shadow: 0 8px 24px rgba(90,200,250,0.25);
}
.pf-link::before {
  background: linear-gradient(90deg, transparent, rgba(90,200,250,0.3), transparent);
}
.pf-link.disabled {
  background: rgba(255,255,255,0.03);
  border-color: var(--rule);
  color: var(--text-4);
}

.portfolio-note { color: var(--text-4); }

/* ============================================================
   MOBILE ADAPTATION · < 768px critical fixes
   ============================================================ */
@media (max-width: 768px) {
  /* Hero — compact heights + scaled-down typography */
  .section-hero { min-height: auto; padding: 0; }
  .hero-inner { padding: 80px 24px 60px !important; max-width: 100% !important; }
  .hero-blurb { word-break: break-word; overflow-wrap: anywhere; }
  .hero-info { word-break: break-word; }
  .hero-email { word-break: break-all; }
  .hero-name { font-size: 26px !important; letter-spacing: 0.12em !important; }
  .hero-subtitle { font-size: 13px !important; }
  .hero-info { font-size: 12px !important; }
  .hero-email { font-size: 13px !important; word-break: break-all; }
  .hero-label { font-size: 12px !important; letter-spacing: 0.3em !important; }
  .hero-roles {
    grid-template-columns: 1fr !important;
    gap: 14px !important;
  }
  .role-item { font-size: 26px !important; letter-spacing: 0.04em !important; }
  .hero-meta {
    grid-template-columns: 1fr !important;
    gap: 28px !important;
  }
  .hero-blurb { font-size: 14px !important; line-height: 1.9 !important; }

  /* Generic section reduce */
  .section { padding: 64px 0 !important; }
  .container { padding: 0 20px !important; }
  .sec-cn { font-size: 28px !important; }
  .sec-en { font-size: 11px !important; }

  /* About — single col */
  .about-grid { grid-template-columns: 1fr !important; gap: 32px !important; }
  .capability-grid { grid-template-columns: 1fr !important; gap: 14px !important; }

  /* Timeline — single col + smaller cards */
  .timeline-track { padding: 0 !important; }
  .tl-item { grid-template-columns: 1fr !important; padding-left: 24px !important; }
  .tl-period { font-size: 12px !important; }
  .tl-role { font-size: 18px !important; }
  .tl-company { font-size: 13px !important; }
  .ttag { font-size: 11px !important; padding: 3px 8px !important; }

  /* Project — collapse to single col */
  .project-layout { grid-template-columns: 1fr !important; gap: 32px !important; }
  .proj-stats { grid-template-columns: repeat(3, 1fr) !important; gap: 12px !important; }
  .pstat-num { font-size: 28px !important; }
  .pstat-plus { font-size: 18px !important; }
  .pstat-lbl { font-size: 10px !important; }
  .work-cards-3 { grid-template-columns: 1fr !important; gap: 12px !important; }
  .work-cards-6 { grid-template-columns: 1fr !important; gap: 10px !important; }
  .work-grid-2 { grid-template-columns: 1fr !important; gap: 12px !important; }
  .domain-grid { grid-template-columns: repeat(2, 1fr) !important; gap: 8px !important; }
  .sub-matrix { grid-template-columns: repeat(2, 1fr) !important; gap: 8px !important; }
  .arch-strip, .arch-flow { overflow-x: auto; padding-bottom: 8px; }
  .arch-flow, .biz-flow-row, .chain-flow, .erp-flow-row {
    display: flex !important;
    flex-wrap: nowrap !important;
    overflow-x: auto;
    gap: 8px !important;
  }
  .stack-pills { gap: 6px !important; }
  .pill { font-size: 11px !important; padding: 4px 9px !important; }

  /* Startup / Exp */
  .startup-layout, .exp-layout { grid-template-columns: 1fr !important; gap: 28px !important; }
  .big-kpi-num { font-size: 72px !important; }
  .ekpi-num { font-size: 52px !important; }
  .ekpi-num.gold-num { font-size: 52px !important; }
  .sub-metrics { grid-template-columns: repeat(3, 1fr) !important; gap: 10px !important; }
  .sm-num { font-size: 22px !important; }
  .sm-lbl { font-size: 10px !important; }
  .loop-grid { grid-template-columns: 1fr !important; }
  .team-grid { grid-template-columns: 1fr !important; }
  .module-grid-2 { grid-template-columns: 1fr !important; }
  .module-asym { grid-template-columns: 1fr !important; }
  .stage-cards { grid-template-columns: 1fr !important; }
  .role-timeline { flex-direction: column; }
  .rt-line { width: 2px; height: 24px; }

  /* Tech grid */
  .tech-grid { grid-template-columns: 1fr !important; gap: 28px !important; }
  .tr { grid-template-columns: 1fr !important; gap: 4px !important; }
  .tr-name { font-size: 13px !important; }
  .tr-desc { font-size: 12px !important; }
  .tech-cards-3 { grid-template-columns: 1fr !important; }
  .erp-flow-row, .arch-flow { font-size: 11px !important; }

  /* Engineering — single col */
  .eng-grid { grid-template-columns: 1fr !important; gap: 14px !important; }
  .ei-title { font-size: 16px !important; }
  .ei-desc { font-size: 13px !important; }

  /* Portfolio — single col + smaller cards */
  .portfolio-grid { grid-template-columns: 1fr !important; gap: 24px !important; }
  .portfolio-grid .pf-card:first-child {
    grid-template-columns: 1fr !important;
    grid-column: 1 !important;
  }
  .portfolio-grid .pf-card:first-child .pf-mock {
    border-right: none !important;
    border-bottom: 0.5px solid var(--rule) !important;
    min-height: 280px !important;
  }
  .portfolio-grid .pf-card:first-child .phone-frame {
    width: 200px !important; height: 420px !important;
  }
  .portfolio-grid .pf-card:first-child .pf-title { font-size: 22px !important; }
  .portfolio-grid .pf-card:first-child .pfk-num { font-size: 26px !important; }
  .portfolio-grid .pf-card:first-child .pf-body { padding: 28px 24px !important; }
  .pf-mock { height: 280px !important; }
  .phone-frame { width: 180px !important; height: 380px !important; }
  .browser-frame { width: 100% !important; max-width: 320px !important; height: 230px !important; }
  .pf-body { padding: 24px 22px !important; gap: 14px !important; }
  .pf-title { font-size: 18px !important; }
  .pf-desc { font-size: 13px !important; line-height: 1.75 !important; }
  .pf-kpis { grid-template-columns: repeat(3, 1fr) !important; gap: 8px !important; padding: 12px 0 !important; }
  .pfk-num { font-size: 22px !important; }
  .pfk-plus { font-size: 14px !important; }
  .pfk-unit { font-size: 11px !important; }
  .pfk-lbl { font-size: 10px !important; }
  .pf-pill { font-size: 10px !important; padding: 3px 8px !important; }
  .pf-link { font-size: 12px !important; padding: 9px 14px !important; }
  .portfolio-intro { gap: 6px !important; margin-bottom: 36px !important; }
  .pi-pill { font-size: 11px !important; padding: 6px 12px !important; letter-spacing: 0.08em !important; }

  /* Contact */
  .contact-name { font-size: clamp(48px, 16vw, 80px) !important; }
  .contact-subtitle { font-size: 13px !important; }
  .contact-card { max-width: 100% !important; }
  .cc-val { font-size: 15px !important; word-break: break-all !important; }
  .contact-edu { font-size: 12px !important; flex-wrap: wrap !important; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px !important; }
  .section { padding: 56px 0 !important; }
  .role-item { font-size: 22px !important; }
  .sec-cn { font-size: 24px !important; }
}

/* ============================================================
   AGGRESSIVE MOBILE OVERFLOW FIX · all phones < 768px
   Forces every element to respect viewport width.
   ============================================================ */
@media (max-width: 768px) {
  html, body {
    overflow-x: hidden !important;
    max-width: 100vw !important;
    width: 100vw !important;
  }
  * {
    max-width: 100% !important;
    word-wrap: break-word !important;
    overflow-wrap: anywhere !important;
    box-sizing: border-box !important;
  }
  section, .section, .container, .stage, .slide {
    max-width: 100vw !important;
    overflow-x: hidden !important;
  }
  .container { padding: 0 16px !important; }
  /* Horizontal flex rows — force wrap not scroll */
  .arch-flow, .chain-flow, .biz-flow-row, .erp-flow-row, .cf-chains,
  .role-timeline {
    flex-wrap: wrap !important;
    justify-content: flex-start !important;
    gap: 8px !important;
    overflow-x: hidden !important;
  }
  .af-arr, .ef-arr, .bf-arr, .cf-arr { display: none !important; }
  /* Device frames in portfolio — fit phone width */
  .phone-frame {
    width: min(180px, calc(100vw - 80px)) !important;
    height: min(380px, calc((100vw - 80px) * 2.11)) !important;
  }
  .browser-frame {
    width: 100% !important;
    max-width: calc(100vw - 64px) !important;
    height: auto !important;
    min-height: 220px !important;
  }
  .portfolio-grid .pf-card:first-child .phone-frame {
    width: min(200px, calc(100vw - 80px)) !important;
    height: min(420px, calc((100vw - 80px) * 2.1)) !important;
  }
  .pf-mock {
    padding: 16px !important;
    overflow: hidden !important;
  }
  /* Big numbers — fluid scale */
  .big-kpi-num { font-size: clamp(48px, 14vw, 80px) !important; }
  .cs-big { font-size: clamp(32px, 10vw, 56px) !important; }
  .ekpi-num, .ekpi-num.gold-num { font-size: clamp(36px, 12vw, 60px) !important; }
  .hero-name { font-size: 26px !important; letter-spacing: 0.1em !important; }
  .contact-name { font-size: clamp(40px, 14vw, 72px) !important; }
  /* Email / URL break */
  .hero-email, .cc-val { word-break: break-all !important; }
  /* Tables / matrices — single col on tight phones */
  .domain-grid, .sub-matrix {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 6px !important;
  }
  .layer-arch .la-row { grid-template-columns: auto 1fr !important; gap: 6px !important; }
  .la-desc { grid-column: 1 / -1 !important; font-size: 12px !important; }
  /* Module asym yulong section */
  .module-asym { grid-template-columns: 1fr !important; }
  /* Force any overflowing pre/code/img to wrap */
  pre, code { white-space: pre-wrap !important; word-break: break-all !important; }
  img, svg { max-width: 100% !important; height: auto !important; }
}

@media (max-width: 393px) {
  .container { padding: 0 14px !important; }
  .pf-body { padding: 20px 16px !important; }
  .ops-card { padding: 22px 16px !important; }
  .cap-item, .eng-item, .wcard, .wcard-sm, .wb, .mg-card, .tl-card { padding: 16px !important; }
  .tcat-cn, .ops-title { font-size: 17px !important; }
  .pf-pill, .pill { font-size: 10px !important; padding: 3px 7px !important; }
  .ttag { font-size: 10px !important; padding: 2px 6px !important; }
}