/* ============================================================
   中科简能官方网站 — 孟菲斯设计 / 新野兽派
   Design tokens: 8px radius · hard offset shadows · 0ms transitions
   ============================================================ */

:root {
  --memphis-pink: #FF71CE;
  --memphis-yellow: #FFCE5C;
  --memphis-teal: #86CCCA;
  --memphis-purple: #6A7BB4;
  --ink: #111111;
  --paper: #FFF9EE;
  --card: #FFFFFF;
  --muted: #3D3A33;
  --border: 3px solid var(--ink);
  --radius: 8px;
  --pattern-size: 20px;
  --shape-rotation: 15deg;
  --shadow-soft: 4px 4px 0 var(--ink);
  --shadow-pink: 8px 8px 0 var(--memphis-pink);
  --shadow-teal: 8px 8px 0 var(--memphis-teal);
  --shadow-yellow: 8px 8px 0 var(--memphis-yellow);
  --shadow-purple: 8px 8px 0 var(--memphis-purple);
  --font-display: 'Archivo Black', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans CJK SC', sans-serif;
  --font-body: 'Archivo Black', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans CJK SC', sans-serif;
  --container: 1200px;
}

html[data-theme="dark"] {
  --ink: #FFF6E3;
  --paper: #14110D;
  --card: #1D1913;
  --muted: #CFC8B8;
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]) {
    --ink: #FFF6E3;
    --paper: #14110D;
    --card: #1D1913;
    --muted: #CFC8B8;
  }
}

/* ---------- Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    radial-gradient(var(--pattern-size) circle at center, color-mix(in srgb, var(--ink) 5%, transparent) 1.5px, transparent 1.5px);
  background-size: var(--pattern-size) var(--pattern-size);
  min-height: 100vh;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }

a { color: inherit; }

ul, ol { list-style: none; }

h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.2; }

:focus-visible {
  outline: 3px solid var(--memphis-pink);
  outline-offset: 2px;
}

::selection { background: var(--memphis-yellow); color: #111111; }

/* ---------- Layout ---------- */
.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 24px;
}

.section { padding-block: 64px; position: relative; }

.section--alt {
  background-color: color-mix(in srgb, var(--memphis-teal) 12%, var(--paper));
  border-block: var(--border);
}

.section--alt-pink {
  background-color: color-mix(in srgb, var(--memphis-pink) 12%, var(--paper));
  border-block: var(--border);
}

.section-head { margin-bottom: 40px; max-width: 34em; }

.section-head p { margin-top: 12px; font-size: 16px; color: var(--muted); max-width: 34em; }

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink);
  background: var(--memphis-yellow);
  border: var(--border);
  border-radius: var(--radius);
  padding: 4px 12px;
  box-shadow: var(--shadow-soft);
}

.display {
  font-weight: 900;
  font-size: clamp(2rem, 5vw, 4rem);
  line-height: 1.1;
  text-transform: uppercase;
  letter-spacing: 0.01em;
}

.h2 { font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 700; line-height: 1.2; }

.h3 { font-size: 18px; font-weight: 700; line-height: 1.3; }

.lead { font-size: 18px; line-height: 1.6; color: var(--muted); max-width: 34em; }

.small { font-size: 14px; color: var(--muted); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 24px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  text-decoration: none;
  border: var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: 0ms;
}

.btn--primary {
  background: var(--memphis-pink);
  color: #111111;
  box-shadow: var(--shadow-soft);
}

.btn--primary:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--ink);
}

.btn--primary:active { transform: translate(2px, 2px); box-shadow: 2px 2px 0 var(--ink); }

.btn--secondary {
  background: var(--card);
  color: var(--ink);
  box-shadow: var(--shadow-soft);
}

.btn--secondary:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--memphis-teal);
}

.btn--secondary:active { transform: translate(2px, 2px); box-shadow: 2px 2px 0 var(--memphis-teal); }

.btn--ghost {
  background: transparent;
  border-color: transparent;
  box-shadow: none;
  text-decoration: underline;
  text-decoration-thickness: 3px;
  text-underline-offset: 4px;
  text-decoration-color: var(--memphis-pink);
  color: var(--ink);
  padding-inline: 8px;
}

.btn--ghost:hover { color: var(--memphis-purple); text-decoration-color: var(--memphis-purple); }

.btn[disabled], .btn--primary[disabled] {
  background: color-mix(in srgb, var(--ink) 15%, var(--card));
  color: var(--muted);
  cursor: not-allowed;
  transform: none;
  box-shadow: var(--shadow-soft);
  border-color: color-mix(in srgb, var(--ink) 40%, transparent);
}

/* ---------- Chips ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 12px; }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  border: var(--border);
  border-radius: var(--radius);
  padding: 6px 14px;
  background: var(--card);
  box-shadow: var(--shadow-soft);
}

.chip i.dot { width: 10px; height: 10px; border-radius: 50%; border: 2px solid var(--ink); }

.chip--pink { background: var(--memphis-pink); }
.chip--yellow { background: var(--memphis-yellow); }
.chip--teal { background: var(--memphis-teal); }
.chip--purple { background: var(--memphis-purple); color: #FFF9EE; }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--paper);
  border-bottom: var(--border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 18px;
  letter-spacing: 0.02em;
}

.brand-mark { width: 36px; height: 36px; flex: none; }

.main-nav { display: flex; align-items: center; gap: 8px; }

.main-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  border: 3px solid transparent;
  border-radius: var(--radius);
}

.main-nav a:hover { background: var(--memphis-yellow); border-color: var(--ink); box-shadow: var(--shadow-soft); }

.main-nav a[aria-current="page"] { background: var(--ink); color: var(--paper); border-color: var(--ink); }

.header-actions { display: flex; align-items: center; gap: 12px; }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--card);
  border: var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  cursor: pointer;
  color: var(--ink);
}

.icon-btn:hover { transform: translate(-2px, -2px); box-shadow: 4px 4px 0 var(--memphis-pink); }

.icon-btn:active { transform: translate(2px, 2px); box-shadow: 1px 1px 0 var(--memphis-pink); }

.nav-toggle { display: none; }

.site-header .btn--primary { margin-left: 4px; }

/* ---------- Mobile nav ---------- */
@media (max-width: 860px) {
  .nav-toggle { display: inline-flex; }

  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--paper);
    border-bottom: var(--border);
    padding: 16px 24px 24px;
    display: none;
  }

  .main-nav.open { display: flex; }

  .main-nav a { border: var(--border); background: var(--card); box-shadow: var(--shadow-soft); margin-top: 12px; justify-content: center; }

  .main-nav a[aria-current="page"] { background: var(--ink); color: var(--paper); }

  .header-cta { display: none; }
}

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; border-bottom: var(--border); }

.hero .container {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  align-items: center;
  gap: 48px;
  padding-block: 96px 72px;
}

.hero h1 { margin-top: 20px; }

.hero h1 .hl { position: relative; display: inline-block; padding-inline: 8px; background: var(--memphis-pink); border: var(--border); border-radius: var(--radius); box-shadow: var(--shadow-teal); transform: rotate(-1.5deg); }

.hero .lead { margin-top: 20px; }

.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 32px; }

.hero-chips { margin-top: 40px; }

.hero-art { position: relative; height: 360px; }

.deco { position: absolute; }

.deco--sq {
  width: 120px; height: 120px;
  border: var(--border);
  border-radius: var(--radius);
  background: var(--memphis-yellow);
  transform: rotate(var(--shape-rotation));
  top: 8%; left: 4%;
  box-shadow: var(--shadow-pink);
}

.deco--circ {
  width: 96px; height: 96px;
  border-radius: 50%;
  background: var(--memphis-teal);
  border: var(--border);
  top: 42%; right: 6%;
  box-shadow: var(--shadow-purple);
}

.deco--tri {
  width: 0; height: 0;
  border-left: 60px solid transparent;
  border-right: 60px solid transparent;
  border-bottom: 104px solid var(--memphis-purple);
  bottom: 4%; left: 14%;
  filter: drop-shadow(4px 4px 0 var(--ink));
}

.deco--cross { top: 12%; right: 20%; }

.deco--zig { bottom: 20%; left: 40%; }

.deco--dotgrid {
  width: 140px; height: 140px;
  background-image: radial-gradient(var(--ink) 2.5px, transparent 2.5px);
  background-size: 20px 20px;
  top: 62%; left: 0;
  opacity: 0.5;
}

@media (max-width: 860px) {
  .hero .container { grid-template-columns: 1fr; padding-block: 64px 56px; }
  .hero-art { display: none; }
}

/* ---------- Cards (generic) ---------- */
.card {
  background: var(--card);
  border: var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-soft);
  transition: 0ms;
}

.card:hover { transform: translate(-3px, -3px); box-shadow: 7px 7px 0 var(--memphis-pink); }

.card--teal:hover { box-shadow: 7px 7px 0 var(--memphis-teal); }

.card--yellow:hover { box-shadow: 7px 7px 0 var(--memphis-yellow); }

.card--purple:hover { box-shadow: 7px 7px 0 var(--memphis-purple); }

.card h3 { margin-bottom: 8px; }

.card p { font-size: 15px; color: var(--muted); }

.card .card-icon {
  width: 56px; height: 56px;
  display: grid;
  place-items: center;
  border: var(--border);
  border-radius: var(--radius);
  margin-bottom: 16px;
}

.card .card-icon svg { width: 30px; height: 30px; }

.icon-pink { background: var(--memphis-pink); }
.icon-yellow { background: var(--memphis-yellow); }
.icon-teal { background: var(--memphis-teal); }
.icon-purple { background: var(--memphis-purple); color: #FFF9EE; }

.card .btn { margin-top: 16px; }

.grid { display: grid; gap: 24px; }

.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

@media (max-width: 960px) { .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

@media (max-width: 640px) { .grid-3, .grid-2 { grid-template-columns: 1fr; } }

/* ---------- Home preview strips ---------- */
.stripe {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border: var(--border);
  border-radius: var(--radius);
  background: var(--memphis-yellow);
  color: #111111;
  padding: 24px;
  box-shadow: var(--shadow-pink);
}

.stripe h2 { font-size: clamp(1.25rem, 2.5vw, 1.75rem); }

/* ---------- Page hero (subpages) ---------- */
.page-hero { border-bottom: var(--border); background: color-mix(in srgb, var(--memphis-teal) 16%, var(--paper)); position: relative; overflow: hidden; }

.page-hero .container { padding-block: 64px 48px; position: relative; z-index: 2; }

.page-hero .display { margin-top: 16px; font-size: clamp(1.8rem, 4vw, 3rem); }

.page-hero .lead { margin-top: 12px; }

.page-hero--pink { background: color-mix(in srgb, var(--memphis-pink) 14%, var(--paper)); }

.page-hero--yellow { background: color-mix(in srgb, var(--memphis-yellow) 22%, var(--paper)); }

.page-hero--purple { background: color-mix(in srgb, var(--memphis-purple) 20%, var(--paper)); }

.page-hero .deco--circ { width: 64px; height: 64px; top: 24px; right: 4%; }
.page-hero .deco--sq { width: 64px; height: 64px; top: 90px; right: 12%; box-shadow: none; }

/* ---------- Breadcrumb ---------- */
.breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; font-size: 13px; font-weight: 500; letter-spacing: 0.04em; text-transform: uppercase; }

.breadcrumb a { text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 3px; min-height: 44px; display: inline-flex; align-items: center; }

.breadcrumb a:hover { color: var(--memphis-purple); }

.breadcrumb span[aria-current] { background: var(--ink); color: var(--paper); border-radius: var(--radius); padding: 2px 10px; }

/* ---------- Timeline ---------- */
.timeline { position: relative; padding-left: 32px; display: grid; gap: 24px; max-width: 34em; }

.timeline::before {
  content: "";
  position: absolute;
  left: 7px; top: 8px; bottom: 8px;
  width: 0;
  border-left: 3px dashed var(--ink);
}

.timeline-item { position: relative; }

.timeline-item::before {
  content: "";
  position: absolute;
  left: -32px; top: 6px;
  width: 14px; height: 14px;
  background: var(--memphis-pink);
  border: var(--border);
  border-radius: 50%;
}

.timeline-item h3 { font-size: 18px; }

.timeline-item time { font-size: 13px; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); }

.timeline-item p { font-size: 15px; color: var(--muted); margin-top: 4px; }

/* ---------- Mission / vision ---------- */
.mission-card { border: var(--border); border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow-soft); }

.mission-card h3 { font-size: 22px; text-transform: uppercase; margin-bottom: 12px; }

.mission-card p { color: #111111; }

.mission-card--pink { background: var(--memphis-pink); }

.mission-card--teal { background: var(--memphis-teal); }

/* ---------- Team ---------- */
.avatar {
  width: 96px; height: 96px;
  border: var(--border);
  border-radius: var(--radius);
  display: grid;
  place-items: center;
  margin-bottom: 16px;
}

.avatar svg { width: 64px; height: 64px; }

.role-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: var(--border);
  border-radius: var(--radius);
  padding: 2px 10px;
  margin-bottom: 8px;
  background: var(--memphis-yellow);
  color: #111111;
}

/* ---------- Detail pages ---------- */
.detail-grid { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); gap: 48px; align-items: start; }

@media (max-width: 860px) { .detail-grid { grid-template-columns: 1fr; } }

.feature-list li { display: flex; gap: 12px; align-items: flex-start; padding-block: 12px; border-bottom: 3px dashed color-mix(in srgb, var(--ink) 25%, transparent); }

.feature-list li:last-child { border-bottom: 0; }

.feature-list svg { flex: none; width: 24px; height: 24px; margin-top: 3px; }

.scene-card { border: var(--border); border-radius: var(--radius); background: var(--card); box-shadow: var(--shadow-soft); padding: 20px; }

.scene-card h3 { font-size: 16px; margin-bottom: 4px; }

.scene-card p { font-size: 14px; color: var(--muted); }

.aside-box { border: var(--border); border-radius: var(--radius); background: var(--memphis-yellow); color: #111111; box-shadow: var(--shadow-soft); padding: 24px; }

.aside-box h3 { text-transform: uppercase; margin-bottom: 8px; }

.aside-box p { font-size: 15px; }

.aside-box .btn { margin-top: 16px; }

.related-nav { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 48px; }

/* ---------- Contact form ---------- */
.contact-grid { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 48px; align-items: start; }

@media (max-width: 860px) { .contact-grid { grid-template-columns: 1fr; } }

.form-card { background: var(--card); border: var(--border); border-radius: var(--radius); box-shadow: var(--shadow-pink); padding: 32px; }

.field { margin-bottom: 20px; }

.field label {
  display: block;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
  text-transform: uppercase;
}

.field input, .field textarea {
  width: 100%;
  min-height: 48px;
  font-family: var(--font-body);
  font-size: 16px;
  color: var(--ink);
  background: var(--paper);
  border: var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
}

.field textarea { min-height: 140px; resize: vertical; }

.field input:focus-visible, .field textarea:focus-visible { outline: 3px solid var(--memphis-purple); outline-offset: 2px; }

.field .hint { font-size: 13px; color: var(--muted); margin-top: 6px; }

.form-status {
  display: none;
  margin-top: 16px;
  border: var(--border);
  border-radius: var(--radius);
  background: var(--memphis-teal);
  color: #111111;
  padding: 12px 16px;
  font-size: 15px;
  font-weight: 700;
  box-shadow: var(--shadow-soft);
}

.form-status.show { display: block; }

.contact-info { display: grid; gap: 16px; }

.contact-info .card { display: flex; gap: 12px; align-items: flex-start; }

.contact-info svg { flex: none; width: 24px; height: 24px; margin-top: 3px; }

.contact-info p { font-size: 15px; }

/* ---------- Footer ---------- */
.site-footer {
  margin-top: 64px;
  background: var(--ink);
  color: var(--paper);
  border-top: var(--border);
}

.site-footer .container { padding-block: 48px 24px; }

.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 32px; }

@media (max-width: 720px) { .footer-grid { grid-template-columns: 1fr; } }

.site-footer .brand { color: var(--paper); }

.footer-links { display: grid; gap: 8px; }

.footer-links a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
  text-decoration-color: color-mix(in srgb, var(--paper) 40%, transparent);
  font-size: 15px;
}

.footer-links a:hover { text-decoration-color: var(--memphis-pink); color: var(--memphis-pink); }

.footer-bottom {
  margin-top: 32px;
  padding-top: 16px;
  border-top: 3px dashed color-mix(in srgb, var(--paper) 30%, transparent);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  justify-content: space-between;
  font-size: 14px;
  color: color-mix(in srgb, var(--paper) 75%, transparent);
}

/* ---------- Skip link ---------- */
.skip-link {
  position: absolute;
  left: 16px; top: -64px;
  z-index: 100;
  background: var(--memphis-yellow);
  color: #111111;
  border: var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  padding: 10px 16px;
  font-weight: 700;
  text-decoration: none;
  transition: 0ms;
}

.skip-link:focus { top: 16px; }

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}