/* ================= Taste Skill: Minimalist UI ================= */
/* Protocol: Premium Utilitarian Minimalism & Editorial UI         */
/* ============================================================== */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400&family=Newsreader:opsz,wght@6..72,300;6..72,400;6..72,500;6..72,600&display=swap');

:root {
  --bg: #F7F6F3;
  --bg-card: #FFFFFF;
  --border: #EAEAEA;
  --text-primary: #2F3437;
  --text-secondary: #787774;
  --text-muted: #B0AEAB;
  --accent-red-bg: #FDEBEC;
  --accent-red-text: #9F2F2D;
  --accent-blue-bg: #E1F3FE;
  --accent-blue-text: #1F6C9F;
  --accent-green-bg: #EDF3EC;
  --accent-green-text: #346538;
  --accent-yellow-bg: #FBF3DB;
  --accent-yellow-text: #956400;
  --black: #111111;
  --max-w: 1120px;
  --radius-sm: 4px;
  --radius: 8px;
  --font-serif: 'Playfair Display', 'Newsreader', 'Georgia', serif;
  --font-sans: -apple-system, 'Helvetica Neue', 'SF Pro Display', sans-serif;
  --font-cn: 'Libian SC', 'STLibianSC-Regular', 'Noto Serif SC', 'Noto Sans SC', serif;
  --font-latin: 'Helvetica Neue', -apple-system, 'SF Pro Display', sans-serif;
  --font-mono: 'SF Mono', 'JetBrains Mono', monospace;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 18px; }
/* 中文模式（Libian SC 视觉偏小，提一档） */
html[lang="zh-CN"] { font-size: 20px; }
html, body { display: block !important; }

body {
  font-family: var(--font-latin), var(--font-cn);
  color: var(--text-primary);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
/* 中文模式：Libian SC（匹配PPT字体） */
body[data-lang="zh"] {
  font-family: var(--font-cn);
}
/* 英/德文模式：无衬线字体，接近PPT Helvetica */
body[data-lang="en"], body[data-lang="de"] {
  font-family: var(--font-latin);
}

.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ================= Typography ================= */
.section-header {
  text-align: center;
  margin-bottom: 80px;
}
.section-tag {
  display: inline-block;
  padding: 2px 10px;
  background: var(--accent-blue-bg);
  color: var(--accent-blue-text);
  border-radius: 9999px;
  font-size: .8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: 20px;
  font-family: var(--font-sans);
}
.section-header h2 {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
  line-height: 1.15;
  letter-spacing: -.02em;
}
.section-header p {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
}

/* ================= Buttons ================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  font-size: .85rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: all .2s var(--ease);
  font-family: inherit;
  letter-spacing: .01em;
}
.btn-primary {
  background: var(--black);
  color: #fff;
}
.btn-primary:hover { background: #333; }
.btn-primary:active { transform: scale(.98); }
.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-outline:hover { border-color: var(--text-primary); }

/* ================= Navigation ================= */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: all .3s var(--ease);
}
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.nav-logo { display: flex; align-items: center; }
.nav-logo-img { height: 26px; width: auto; display: block; }
.nav-links { display: flex; gap: 28px; }
.nav-links a {
  font-size: .9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color .2s var(--ease);
  letter-spacing: .02em;
  text-transform: uppercase;
}
.nav-links a:hover { color: var(--text-primary); }
.nav-right { display: flex; align-items: center; gap: 16px; }
.lang-switch { display: flex; border: 1px solid var(--border); border-radius: 4px; overflow: hidden; }
.lang-btn {
  padding: 4px 10px;
  font-size: .75rem;
  font-weight: 500;
  border: none;
  background: transparent;
  cursor: pointer;
  color: var(--text-muted);
  font-family: inherit;
  text-transform: uppercase;
  letter-spacing: .05em;
  transition: all .15s var(--ease);
}
.lang-btn.active { background: var(--black); color: #fff; }
.lang-btn:hover:not(.active) { background: var(--bg); }
.menu-toggle { display: none; flex-direction: column; gap: 4px; background: none; border: none; cursor: pointer; padding: 4px; }
.menu-toggle span { display: block; width: 22px; height: 2px; background: var(--text-primary); border-radius: 1px; transition: all .2s var(--ease); }

/* ================= Hero ================= */
.hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  padding: 100px 0 80px;
  background: var(--bg);
  overflow: hidden;
}
/* Ambient background blob */
.hero::before {
  content: '';
  position: absolute;
  width: 600px;
  height: 600px;
  top: -200px;
  right: -100px;
  background: radial-gradient(circle, rgba(200,190,180,.03) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  animation: blob 20s ease-in-out infinite;
}
@keyframes blob {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(30px, -30px) scale(1.1); }
}
.hero-grid { display: grid; grid-template-columns: 1fr; gap: 0; align-items: center; max-width: 720px; margin: 0 auto; text-align: center; }
.hero-badge { font-size: .85rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: .08em; margin-bottom: 24px; }
.hero-title {
  font-family: var(--font-serif);
  font-size: 3.5rem;
  font-weight: 600;
  line-height: 1.1;
  color: var(--text-primary);
  letter-spacing: -.03em;
  margin-bottom: 20px;
}
.hero-title span { color: var(--text-primary); font-style: italic; }
.hero-sub {
  font-size: 1rem;
  color: var(--text-secondary);
  font-style: italic;
  font-family: var(--font-serif);
  margin-bottom: 6px;
}
.hero-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  margin: 24px auto 36px;
  max-width: 520px;
  line-height: 1.7;
}
.hero-actions { display: flex; gap: 12px; justify-content: center; }
.hero-visual { display: none; }

/* ================= Numbers ================= */
.numbers {
  padding: 80px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--bg-card);
}
.numbers-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; text-align: center; }
.num-item {
  padding: 16px 24px;
  border-right: 1px solid var(--border);
}
.num-item:last-child { border-right: none; }
.num-value {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 400;
  color: var(--text-primary);
  letter-spacing: -.02em;
  margin-bottom: 4px;
}
.num-label { font-size: .85rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: .06em; }

/* ================= About ================= */
.about {
  padding: 120px 0;
  background: var(--bg);
}
.about-content {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  align-items: start;
}
.about-text p {
  font-size: 1rem;
  color: var(--text-primary);
  margin-bottom: 20px;
  line-height: 1.8;
}
.about-mission {
  margin-top: 40px;
  padding: 24px 0 0;
  border-top: 1px solid var(--border);
}
.about-mission span {
  font-size: .75rem;
  font-weight: 600;
  color: var(--text-muted);
  display: block;
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: .08em;
}
.about-mission p { margin-bottom: 0; font-size: 1rem; color: var(--text-secondary); }
.about-logos h4 {
  font-size: .75rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: .08em;
}
.logo-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.logo-item {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: .8rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: .05em;
  text-transform: uppercase;
}

/* ================= Services ================= */
.services {
  padding: 120px 0;
  background: var(--bg-card);
  border-top: 1px solid var(--border);
}
.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.service-card {
  background: var(--bg-card);
  padding: 40px 36px;
  position: relative;
  transition: all .2s var(--ease);
}
.service-card:hover { background: #FAFAF9; }
.card-icon {
  width: 32px;
  height: 32px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}
.card-icon svg { width: 18px; height: 18px; stroke: var(--text-primary); fill: none; stroke-width: 1.5; }
.service-card h3 {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.3;
  letter-spacing: -.01em;
  margin-bottom: 12px;
}
.service-card > p {
  font-size: .95rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.6;
}
.service-card ul li {
  font-size: .9rem;
  color: var(--text-secondary);
  padding: 5px 0;
  padding-left: 16px;
  position: relative;
}
.service-card ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 11px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--text-muted);
}
.card-highlight {
  position: relative;
}
.card-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 2px 8px;
  background: var(--accent-yellow-bg);
  color: var(--accent-yellow-text);
  border-radius: 9999px;
  font-size: .7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .05em;
}

/* ================= Industries ================= */
.industries {
  padding: 120px 0;
  background: var(--bg);
}
.industries-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.ind-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 36px 12px;
  background: var(--bg-card);
  text-align: center;
  transition: all .2s var(--ease);
}
.ind-item:hover { background: #FAFAF9; }
.ind-icon svg { width: 24px; height: 24px; stroke: var(--text-primary); fill: none; stroke-width: 1.2; }
.ind-item h4 {
  font-size: .8rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: .05em;
}

/* ================= Cases ================= */
.cases {
  padding: 120px 0;
  background: var(--bg-card);
  border-top: 1px solid var(--border);
}
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.case-card {
  background: var(--bg-card);
  padding: 32px;
  transition: all .2s var(--ease);
}
.case-card:hover { background: #FAFAF9; }
.case-year {
  font-size: .7rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: 12px;
}
.case-card h3 {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}
.case-card p { font-size: .9rem; color: var(--text-secondary); line-height: 1.6; }

/* ================= Reports ================= */
.reports {
  padding: 120px 0;
  background: var(--bg);
  border-top: 1px solid var(--border);
}
.reports .section-tag { background: var(--accent-yellow-bg); color: var(--accent-yellow-text); }
.reports-cta { text-align: center; max-width: 540px; margin: 0 auto; }
.reports-cta p { font-size: 1rem; color: var(--text-secondary); margin-bottom: 24px; }
.rpt-categories { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-bottom: 36px; }
.rpt-categories span {
  padding: 6px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 9999px;
  font-size: .8rem;
  color: var(--text-secondary);
}

/* ================= Contact ================= */
.contact {
  padding: 120px 0;
  background: var(--bg-card);
  border-top: 1px solid var(--border);
}
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
}
.contact-info {
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.info-item { display: flex; gap: 16px; }
.info-icon svg {
  width: 20px;
  height: 20px;
  stroke: var(--text-muted);
  fill: none;
  stroke-width: 1.2;
  flex-shrink: 0;
  margin-top: 2px;
}
.info-item h4 {
  font-size: .75rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: .06em;
}
.info-item p { font-size: .95rem; color: var(--text-secondary); }
.info-item a { color: var(--text-primary); text-decoration: underline; text-underline-offset: 2px; text-decoration-color: var(--border); }
.info-item a:hover { text-decoration-color: var(--text-primary); }

.contact-form { display: flex; flex-direction: column; gap: 12px; }
.contact-form input, .contact-form select, .contact-form textarea {
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: .95rem;
  font-family: inherit;
  transition: all .15s var(--ease);
  background: var(--bg);
  color: var(--text-primary);
}
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus {
  outline: none;
  border-color: var(--text-muted);
  background: var(--bg-card);
}
.contact-form button { align-self: flex-start; }

/* ================= Footer ================= */
.footer {
  padding: 80px 0 32px;
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  color: var(--text-secondary);
}
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 60px; margin-bottom: 48px; }
.footer-brand h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 12px; }
.footer-logo-img { height: 22px; width: auto; display: block; }
.footer-brand p { font-size: .9rem; color: var(--text-muted); }
.footer-links h4 {
  font-size: .75rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: .08em;
}
.footer-links a {
  display: block;
  font-size: .85rem;
  padding: 5px 0;
  color: var(--text-secondary);
  transition: color .15s var(--ease);
}
.footer-links a:hover { color: var(--text-primary); }
.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: .8rem;
  color: var(--text-muted);
}

/* ================= Language Toggle (handled by JS) ================= */

/* ================= Responsive ================= */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; text-align: center; }
  .hero-actions { justify-content: center; }
  .about-content { grid-template-columns: 1fr; gap: 40px; }
  .services-grid { grid-template-columns: 1fr; }
  .industries-grid { grid-template-columns: repeat(3, 1fr); }
  .cases-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .menu-toggle { display: flex; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(255,255,255,.98);
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
    gap: 12px;
  }
  .hero-title { font-size: 2.5rem; }
  .hero-sub { font-size: .95rem; }
  .section-header h2 { font-size: 1.8rem; }
  .numbers-grid { grid-template-columns: repeat(2, 1fr); }
  .num-item:nth-child(2) { border-right: none; }
  .num-item:nth-child(3), .num-item:nth-child(4) { border-top: 1px solid var(--border); }
  .num-value { font-size: 2rem; }
  .industries-grid { grid-template-columns: repeat(2, 1fr); }
  .cases-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
}